Kolb-List Digest Archive

Mon 10/10/16


Total Messages Posted: 14



Today's Message Index:
----------------------
 
     1. 06:06 AM - Re: syncro of carbs (racerjerry)
     2. 06:07 AM - Re: syncro of carbs (racerjerry)
     3. 09:12 AM - Re: syncro of carbs (Richard Pike)
     4. 12:43 PM - Re: Fw: Brakes and full enclosure (John Hauck)
     5. 12:44 PM - Re: Kolb-List Digest: 2 Msgs - 10/09/16 (B Young)
     6. 04:27 PM - More HKS Engine Interference Questions (Bill Berle)
     7. 04:49 PM - Re: More HKS Engine Interference Questions (Larry Cottrell)
     8. 05:02 PM - Re: More HKS Engine Interference Questions (Stuart Harner)
     9. 05:54 PM - Re: Fw: Brakes and full enclosure (Herb)
    10. 05:56 PM - Re: Fw: Brakes and full enclosure (Herb)
    11. 06:07 PM - Re: Fw: Brakes and full enclosure (Herb)
    12. 06:31 PM - Re: More HKS Engine Interference Questions (Larry Cottrell)
    13. 11:12 PM - Re: More HKS Engine Interference Questions (Bill Berle)
    14. 11:28 PM - Re: More HKS Engine Interference Questions (Bill Berle)
 
 
 


Message 1


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    Time: 06:06:55 AM PST US
    Subject: Re: syncro of carbs
    From: "racerjerry" <gnking2@verizon.net>
    I think the confusion is that we are not used to looking at a CLOSED SYSTEM. There is no vent to atmosphere and hoses fit tightly into bottles. If vacuum on one bottle is greater, fluid will flow into that bottle. If carbs are adjusted equal, fluid flow between bottles will stop. Fluid level does not matter. Fluid transferring between bottles means carbs are not balanced. -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=461122#461122


    Message 2


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    Time: 06:07:54 AM PST US
    Subject: Re: syncro of carbs
    From: "racerjerry" <gnking2@verizon.net>
    I think the confusion is that we are not used to looking at a CLOSED SYSTEM. There is no vent to atmosphere and hoses fit tightly into bottles. If vacuum on one bottle is greater, fluid will flow into that bottle. If carbs are adjusted equal, fluid flow between bottles will stop. Fluid level does not matter. Fluid transferring between bottles means carbs are not balanced. -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=461121#461121


    Message 3


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    Time: 09:12:22 AM PST US
    Subject: Re: syncro of carbs
    From: "Richard Pike" <thegreybaron@charter.net>
    racerjerry wrote: > I think the confusion is that we are not used to looking at a CLOSED SYSTEM. > There is no vent to atmosphere and hoses fit tightly into bottles. If vacuum on one bottle is greater, fluid will flow into that bottle. If carbs are adjusted equal, fluid flow between bottles will stop. Fluid level does not matter. Fluid transferring between bottles means carbs are not balanced. Makes perfect sense. Imbalance of vacuum=movement. Lack of movement=balance. Thanks, got it. HOWEVER ~ (Much mental activity going on here... sound of gears grinding...) ~ I am thinking that in order to know that your carbs were in fact perfectly balanced, you would have to balance the carbs, open the system, reconnect the system, and run the engine again. Here is why: even in a closed system, the levels of liquid would still seek to be even with each other, because if one liquid level was higher, it would want to siphon until both levels were equal, but it can't. If one bottle was higher, it would want to siphon into the lower, but because the system is closed, it cannot level itself. However, gravity is still placing an inherent imbalance on those liquid levels. That gravity imbalance manifests itself as a pressure differential, and that is what we are measuring when we balance our carbs. In our situation, if the levels stabilize at an unequal height during adjustment, I think it is going to preclude getting a perfect carb balance because now we have to factor in a pressure differential caused by unequal weights of liquid in the two bottles. Even in a closed system, that pressure differential still has to be a factor somewhere. Let's say you start with both bottles level, liquid levels the same, hook it up and run the engine. Carbs not balanced, siphon occurs and the bottle with the highest vacuum begins to fill. You adjust the carbs for balance, and siphon/transfer stops. But if one bottle is now 1/3 full and the other bottle is 2/3's full, then there is a weight / pressure imbalance which my carb vacuum settings have to compensate for. One bottle has a much greater weight of liquid, which is seeking its own level, but my carb setting is preventing that from happening. Which implies to me that my carb setting cannot be perfectly balanced if it is compensating for a weight imbalance / pressure differential. So if I was doing it, at this point I would shut down the engine, disconnect the tubing, let the liquid siphon/transfer occur until both bottles have level liquid, then hook the system up again, run the engine, and if the carbs are in fact balanced, no transfer would occur, and the liquid levels would stay the same. Then I could quit worrying about it. [Wink] -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kingsport, TN 3TN0 Would you consider yourself to be a good person? https://www.youtube.com/watch?v=VWcDXT6pH7A Read this topic online here: http://forums.matronics.com/viewtopic.php?p=461124#461124


    Message 4


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    Time: 12:43:31 PM PST US
    From: "John Hauck" <jhauck@elmore.rr.com>
    Subject: Fw: Brakes and full enclosure
    Brakes are good for lots of stuff: -As Herb mentioned, ground handling, especially in high wind. Also nice to prevent ground looping in high cross wind conditions. -Back in the mid 1980s, I landed at Ozark, Alabama, Airport. The gas pump was downhill from the taxiway. Had to get out of the US and FS (before I got brakes) and walk the aircraft down to the pump. -They are also handy for run up and mag check. Plenty cross wind in Ely, NV. Hard to walk from the truck to McDonalds for a hamburger. ;-) john h mkIII From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of Herb Sent: Saturday, October 08, 2016 11:59 AM Subject: Re: Kolb-List: Fw: Brakes and full enclosure good for ground handling...mainly...Herb On 10/08/2016 11:04 AM, chris davis wrote: Herb Thank u for the very complete answer to my full enclosure question Im sure I can build it for a lot less than $300 that Kolb asked for it . Your brakes look great but my question was do I need brakes more on the Firefly than the Firestar? thank u Chris Chris Davis KXP 503 492 hrs Glider Pilot Disabled from crash building Firefly On Friday, October 7, 2016 8:59 PM, Herb <mailto:Herbgh@nctc.com> <Herbgh@nctc.com> wrote: slow list Chris... I have installed full enclosures on two Fireflys...I did a gull wing enclosure on my MkIII.. easy to do...the 1/16 lexan just lays over the nose cone... a 4x4 sheet works...was 35 to 40 bucks here in Tenn.. Lay the paper covered lexan over the nose cone and rear bow that you have made and do a rough marking of the size...over sized a bit but to shape ..this makes it easy to clamp and handle. Once the shape is made then move on to mounting..I let the Lexan lay over the nose cone by about 1 and one half inch..enough to allow the rubber seal to clear the front of the cone a bit... 1/8th inch...will do.. Making the rear bow is not science...just bend it carefully and try not to go to round such that it is sticking out any further than need be...Guess your shoulders would dictate the bow size..Oval is good..toward flat.on the sides.. The top of this bow is braced by another bow that runs rather horizontal to the cromolly verticals that attach to the spar carry through..this is attached to the cromolly tubes with gussets and that tube and rear bow meet and are gusseted to one another..on the top... I install a stop screw and decorative washer at about 10 am.. thru the lexan to the cone..I raise the lexan up to a comfortable entry position and install that screw...I also note where the lexan is on the rear bow and install large head rivets from there down to the end of the bow on that side(left) I install a powder coated white angle aluminum on the top of the left longeron and fasten it in maybe three or 4 places then fasten it to the lexan from nose to bow I attach it to the bottom of the rear bow but not to the nose cone....I use the decorative dimpled washer and flush screws there...then once the lexan is down on the right side...I mark the paper covering and install white angle aluminum there also..from nose cone to bow..At the nose end I install a tapered screw of my own making I flatten or grind it flat and attach it to the aluminum angle ..I drill a hole in the nose cone bracket such that the tapered screw fits snugly and holds a good wrap around the nose cone.. before you do this install the rubber seal on this end of the lexan..some hold it with silicone but I use the 3m black weather seal...Trial fit the rubber seal and tape the lexan on both sides so that the rubber goo that squeezes out of the seal does not get on the lexan beyond where it is intended to go...I use good auto paint tape here...Then install the tapered screw on the angle that is attached same as the angle on the left side...now...make a sliding latch that is captured by the aluminum bow that the rear of the lexan lays on...you can make some sort of prop...to hold the lexan open for entry/exit ...i tended to use my head... naturally the right side angle is only attached to the lexan... and it is good to make a stop on the sliding latch such that is cannot rise up the bow..though the slip stream should be fine for that... Clear as mud? Herb my cost is usually the price of the lexan...maybe total of 50 bucks.. oops...brakes...I use mountain bike brakes..they come from the salvage yard on bicycles ...front only usually...meaning that one side mounts with cable forward and the other side rearword.. I turn aluminum spindles to mate the disk to the rim..I have good luck using the two piece spun rims...they are true... The hard part is mounting the caliper...here you need to make an aluminum plate that slides over the axle and mounts to the 4 holes in the large washer that is part of the kolb axle..from here it is a matter of a spacer,trial and error, to get the disk pad/caliper/disk distance correct. a cromolly tube that slips over the axle and sets the distance from disk/rim to caliper... is the spacer.. In the pics..notice that I left too much lexan on the left side..need only be 1/4 inch below the longeron.. On 10/07/2016 01:49 PM, chris davis wrote: Chris Davis KXP 503 492 hrs Glider Pilot Disabled from crash building Firefly On Friday, October 7, 2016 2:34 PM, chris davis <mailto:capedavis@yahoo.com> <capedavis@yahoo.com> wrote: Kolbers i have a couple questions on a Firefly. I flew my Firestar KXP for 10 years without brakes , had almost no trouble on the field i fly out of " Chatham Municipal" 3000 ft asphalt with a full length grass field along side which i used most of the time but I also went to flyins where there was a lot of aircraft taking off and landing never had any trouble as long as I stayed alert and thought ahead! I read most kolb concerned emails on the list and see that most builders go out of there way and risk too much weight to install brakes . Are they necessary ?On a FIREFLY? My next question I prefer a full enclosure and I called Kolb and asked for a price on the full enclosure without the lexan as I have a local supplier for that the price was $308 ? What is included ? Looking at the Plans all I can see is about $30 dollars worth of aluminum and a few bolts I think I can build it myself . Is there somthing I am missing ? Just hoping for some input Chris Chris Davis KXP 503 492 hrs Glider Pilot Disabled from crash building Firefly -- "Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny." Aristotle "Daddy, tell me...why are you going to the pig farm for a reeducation and what does it mean "A basket of deplorables"? "Are you unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's little girl... -- "Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny." Aristotle "Daddy, tell me...why are you going to the pig farm for a reeducation and what does it mean "A basket of deplorables"? "Are you unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's little girl...


    Message 5


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    Time: 12:44:49 PM PST US
    From: B Young <byoungplumbing@gmail.com>
    Subject: Re: Kolb-List Digest: 2 Msgs - 10/09/16
    """Right at the end of the video the man said something that I think is not accurate; he said it makes no difference what the comparative level of the liquid is in the 2 bottles, as long as it is not rising or falling.,..............""" Boyds response. "I think the statement is ok. I can live with it" Because both bottles are tied together they will seak the same level provided the vacuum is the same. But it may take some time to level out. ( the leveling function would be a siphoning action). If the levels are changing rapidly there would be a big difference in vacuum levels. If the levels are changing slowly that would indicate a small difference in vacuum levels... If the levels are the same or different but do not appear to be changing, that would indicate almost exactly the same vacuum levels... One to two inches of water column difference is very tiny... After watching this video , you tube suggested another where they used 4 pressure / vacuums gages. the presenter seemed OK at a one pound difference between carbs... A one pound difference would be a 27 inch water column difference... Setting this will provide a smoother idling engine with less backlash in the propeller reduction gears . with the levels the same, each piston will be creating the same power. (Provided all else is equal) It is probably just as important that the carbs open at the same level at cruise power setting. As was discussed at length in other videos I watched. I think you could chase your tail making it perfect,,,,, then tomorrow with a change in barometric pressure, or , a change in the outside air temperature, or some other variable factor,,, you could do it all over again Kis, keep it simple and go fly!!! Boyd Young Master plumber retired,,, Mk lll driver, 900 plus hours, utah


    Message 6


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    Time: 04:27:10 PM PST US
    From: Bill Berle <victorbravo@sbcglobal.net>
    Subject: More HKS Engine Interference Questions
    Hi again Kolb List, I spent several hours out at the hangar trying to figure out the correct mounting for the HKS engine that will clear the wing parts when folded. I need an answer to another question from those who have been downt his road with the HKS. What is the acceptable height of the propeller shaft / thrust line on the Firestar, as measured from the Kolb rubber engine mounts, or from the main engine mount support tube on top of the fuselage ? I was and I am in 100% agreement with the many Kolb List experienced pilots who have said that too high of a thrust line causes problems.The lower the thrust line, the better the airplane flies. However, even with the aileron torque tubes rotated or moved out of the way during wing folding, the bottom of the HKS exhaust pipe just under the exhaust port is in contact with the inboard "root rib" area of the trailing edge. Moving the engine FORWARD on the fuselage will solve this problem, but the propeller will hit the bottom of the steel cage just above the tailboom tube. Raising the engine several inches will also solve this interference problem, but then the thrust line may become high enough to change how the airplane flies. So the question is... how high can the propeller thrust line be on a Kolb Firestar 2 without causing a change in the aircraft handling? Bill Berle www.ezflaphandle.com - safety & performance upgrade for light aircraft www.grantstar.net - winning proposals for non-profit and for-profit entities -------------------------------------------- On Mon, 10/10/16, Richard Pike <thegreybaron@charter.net> wrote: Subject: Kolb-List: Re: syncro of carbs To: kolb-list@matronics.com Date: Monday, October 10, 2016, 9:11 AM "Richard Pike" <thegreybaron@charter.net> racerjerry wrote: > I think the confusion is that we are not used to looking at a CLOSED SYSTEM. > There is no vent to atmosphere and hoses fit tightly into bottles.If vacuum on one bottle is greater, fluid will flow into that bottle. If carbs are adjusted equal, fluid flow between bottles will stop. Fluid level does not matter. Fluid transferring between bottles means carbs are not balanced. Makes perfect sense. Imbalance of vacuum=movement. Lack of movement=balance. Thanks, got it. HOWEVER ~ (Much mental activity going on here... sound of gears grinding...) ~ I am thinking that in order to know that your carbs were in fact perfectly balanced, you would have to balance the carbs, open the system, reconnect the system, and run the engine again. Here is why: even in a closed system, the levels of liquid would still seek to be even with each other, because if one liquid level was higher, it would want to siphon until both levels were equal, but it can't. If one bottle was higher, it would want to siphon into the lower, but because the system is closed, it cannot level itself. However, gravity is still placing an inherent imbalance on those liquid levels. That gravity imbalance manifests itself as a pressure differential, and that is what we are measuring when we balance our carbs. In our situation, if the levels stabilize at an unequal height during adjustment, I think it is going to preclude getting a perfect carb balance because now we have to factor in a pressure differential caused by unequal weights of liquid in the two bottles. Even in a closed system, that pressure differential still has to be a factor somewhere. Let's say you start with both bottles level, liquid levels the same, hook it up and run the engine. Carbs not balanced, siphon occurs and the bottle with the highest vacuum begins to fill. You adjust the carbs for balance, and siphon/transfer stops. But if one bottle is now 1/3 full and the other bottle is 2/3's full, then there is a weight / pressure imbalance which my carb vacuum settings have to compensate for. One bottle has a much greater weight of liquid, which is seeking its own level, but my carb setting is preventing that from happening. Which implies to me that my carb setting cannot be perfectly balanced if it is compensating for a weight imbalance / pressure differential. So if I was doing it, at this point I would shut down the engine, disconnect the tubing, let the liquid siphon/transfer occur until both bottles have level liquid, then hook the system up again, run the engine, and if the carbs are in fact balanced, no transfer would occur, and the liquid levels would stay the same. Then I could quit worrying about it. [Wink] -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kingsport, TN 3TN0 Would you consider yourself to be a good person? https://www.youtube.com/watch?v=VWcDXT6pH7A Read this topic online here: http://forums.matronics.com/viewtopic.php?p=461124#461124 Forum - - MATRONICS WEB FORUMS - MATRONICS LIST WIKI - List Contribution Web Site - -Matt Dralle, List Admin.


    Message 7


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    Time: 04:49:00 PM PST US
    From: Larry Cottrell <lcottrell1020@gmail.com>
    Subject: Re: More HKS Engine Interference Questions
    > > So the question is... how high can the propeller thrust line be on a Kolb > Firestar 2 without causing a change in the aircraft handling? > Bill Berle > -------- > > Since I am one of the few that have an HKS, I guess that I will have to tell you again that I have mine with 2 inch risers, swing a 66 inch prop giving me about 3/4 of an inch clearance. As to your question about how high- I cannot tell you that as I have not gone there as of yet. I can tell you that my wings will fold by turning the ailerons in the extended position when it is folded. I can also tell you that with the engine set the way that it is, when I give it full throttle the plane climbs without my influence on the stick. So apparently I have not raised it too high yet. I once rode in a Mark three that when full throttle was applied the plane dived without stick up pressure. It scared me! Larry


    Message 8


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    Time: 05:02:34 PM PST US
    From: "Stuart Harner" <stuart@harnerfarm.net>
    Subject: More HKS Engine Interference Questions
    Just a thought. Move the engine forward to clear the exhaust. Use a spacer to move the prop backward enough to clear the rear spar. Stuart -----Original Message----- From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of Bill Berle Sent: Monday, October 10, 2016 6:27 PM Subject: Kolb-List: More HKS Engine Interference Questions Hi again Kolb List, I spent several hours out at the hangar trying to figure out the correct mounting for the HKS engine that will clear the wing parts when folded. I need an answer to another question from those who have been downt his road with the HKS. What is the acceptable height of the propeller shaft / thrust line on the Firestar, as measured from the Kolb rubber engine mounts, or from the main engine mount support tube on top of the fuselage ? I was and I am in 100% agreement with the many Kolb List experienced pilots who have said that too high of a thrust line causes problems.The lower the thrust line, the better the airplane flies. However, even with the aileron torque tubes rotated or moved out of the way during wing folding, the bottom of the HKS exhaust pipe just under the exhaust port is in contact with the inboard "root rib" area of the trailing edge. Moving the engine FORWARD on the fuselage will solve this problem, but the propeller will hit the bottom of the steel cage just above the tailboom tube. Raising the engine several inches will also solve this interference problem, but then the thrust line may become high enough to change how the airplane flies. So the question is... how high can the propeller thrust line be on a Kolb Firestar 2 without causing a change in the aircraft handling? Bill Berle www.ezflaphandle.com - safety & performance upgrade for light aircraft www.grantstar.net - winning proposals for non-profit and for-profit entities -------------------------------------------- On Mon, 10/10/16, Richard Pike <thegreybaron@charter.net> wrote: Subject: Kolb-List: Re: syncro of carbs To: kolb-list@matronics.com Date: Monday, October 10, 2016, 9:11 AM "Richard Pike" <thegreybaron@charter.net> racerjerry wrote: > I think the confusion is that we are not used to looking at a CLOSED SYSTEM. > There is no vent to atmosphere and hoses fit tightly into bottles. If vacuum on one bottle is greater, fluid will flow into that bottle. If carbs are adjusted equal, fluid flow between bottles will stop. Fluid level does not matter. Fluid transferring between bottles means carbs are not balanced. Makes perfect sense. Imbalance of vacuum=movement. Lack of movement=balance. Thanks, got it. HOWEVER ~ (Much mental activity going on here... sound of gears grinding...) ~ I am thinking that in order to know that your carbs were in fact perfectly balanced, you would have to balance the carbs, open the system, reconnect the system, and run the engine again. Here is why: even in a closed system, the levels of liquid would still seek to be even with each other, because if one liquid level was higher, it would want to siphon until both levels were equal, but it can't. If one bottle was higher, it would want to siphon into the lower, but because the system is closed, it cannot level itself. However, gravity is still placing an inherent imbalance on those liquid levels. That gravity imbalance manifests itself as a pressure differential, and that is what we are measuring when we balance our carbs. In our situation, if the levels stabilize at an unequal height during adjustment, I think it is going to preclude getting a perfect carb balance because now we have to factor in a pressure differential caused by unequal weights of liquid in the two bottles. Even in a closed system, that pressure differential still has to be a factor somewhere. Let's say you start with both bottles level, liquid levels the same, hook it up and run the engine. Carbs not balanced, siphon occurs and the bottle with the highest vacuum begins to fill. You adjust the carbs for balance, and siphon/transfer stops. But if one bottle is now 1/3 full and the other bottle is 2/3's full, then there is a weight / pressure imbalance which my carb vacuum settings have to compensate for. One bottle has a much greater weight of liquid, which is seeking its own level, but my carb setting is preventing that from happening. Which implies to me that my carb setting cannot be perfectly balanced if it is compensating for a weight imbalance / pressure differential. So if I was doing it, at this point I would shut down the engine, disconnect the tubing, let the liquid siphon/transfer occur until both bottles have level liquid, then hook the system up again, run the engine, and if the carbs are in fact balanced, no transfer would occur, and the liquid levels would stay the same. Then I could quit worrying about it. [Wink] -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kingsport, TN 3TN0 Would you consider yourself to be a good person? https://www.youtube.com/watch?v=VWcDXT6pH7A Read this topic online here: http://forums.matronics.com/viewtopic.php?p=461124#461124 Forum - - MATRONICS WEB FORUMS - MATRONICS LIST WIKI - List Contribution Web Site - -Matt Dralle, List Admin.


    Message 9


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    Time: 05:54:44 PM PST US
    Subject: Re: Fw: Brakes and full enclosure
    From: Herb <Herbgh@nctc.com>
    Yep...groung handling takes many forms...:-) Herb On 10/10/2016 02:42 PM, John Hauck wrote: > > Brakes are good for lots of stuff: > > -As Herb mentioned, ground handling, especially in high wind.Also nice > to prevent ground looping in high cross wind conditions. > > -Back in the mid 1980s, I landed at Ozark, Alabama, Airport.The gas > pump was downhill from the taxiway.Had to get out of the US and FS > (before I got brakes) and walk the aircraft down to the pump. > > -They are also handy for run up and magcheck. > > Plenty cross wind in Ely, NV.Hard to walk from the truck to McDonalds > for a hamburger.;-) > > john h > > mkIII > > *From:*owner-kolb-list-server@matronics.com > [mailto:owner-kolb-list-server@matronics.com] *On Behalf Of *Herb > *Sent:* Saturday, October 08, 2016 11:59 AM > *To:* kolb-list@matronics.com > *Subject:* Re: Kolb-List: Fw: Brakes and full enclosure > > good for ground handling...mainly...Herb > > On 10/08/2016 11:04 AM, chris davis wrote: > > Herb Thank u for the very complete answer to my full enclosure > question Im sure I can build it for a lot less than $300 that > Kolb asked for it . Your brakes look great but my question was do > I need brakes more on the Firefly than the Firestar? thank u Chris > > Chris Davis > KXP 503 492 hrs > Glider Pilot > Disabled from crash building Firefly > > On Friday, October 7, 2016 8:59 PM, Herb <Herbgh@nctc.com> > <mailto:Herbgh@nctc.com> wrote: > > slow list Chris... > > I have installed full enclosures on two Fireflys...I did a gull > wing enclosure on my MkIII.. > > easy to do...the 1/16 lexan just lays over the nose cone... a > 4x4 sheet works...was 35 to 40 bucks here in Tenn.. Lay the paper > covered lexan over the nose cone and rear bow that you have made > and do a rough marking of the size...over sized a bit but to shape > ..this makes it easy to clamp and handle. Once the shape is made > then move on to mounting..I let the Lexan lay over the nose cone > by about 1 and one half inch..enough to allow the rubber seal to > clear the front of the cone a bit... 1/8th inch...will do.. > > Making the rear bow is not science...just bend it carefully and > try not to go to round such that it is sticking out any further > than need be...Guess your shoulders would dictate the bow > size..Oval is good..toward flat.on the sides.. The top of this bow > is braced by another bow that runs rather horizontal to the > cromolly verticals that attach to the spar carry through..this is > attached to the cromolly tubes with gussets and that tube and rear > bow meet and are gusseted to one another..on the top... > > I install a stop screw and decorative washer at about 10 am.. > thru the lexan to the cone..I raise the lexan up to a comfortable > entry position and install that screw...I also note where the > lexan is on the rear bow and install large head rivets from there > down to the end of the bow on that side(left) I install a powder > coated white angle aluminum on the top of the left longeron and > fasten it in maybe three or 4 places then fasten it to the lexan > from nose to bow I attach it to the bottom of the rear bow but not > to the nose cone....I use the decorative dimpled washer and flush > screws there...then once the lexan is down on the right side...I > mark the paper covering and install white angle aluminum there > also..from nose cone to bow..At the nose end I install a tapered > screw of my own making I flatten or grind it flat and attach it > to the aluminum angle ..I drill a hole in the nose cone bracket > such that the tapered screw fits snugly and holds a good wrap > around the nose cone.. before you do this install the rubber seal > on this end of the lexan..some hold it with silicone but I use the > 3m black weather seal...Trial fit the rubber seal and tape the > lexan on both sides so that the rubber goo that squeezes out of > the seal does not get on the lexan beyond where it is intended to > go...I use good auto paint tape here...Then install the tapered > screw on the angle that is attached same as the angle on the left > side...now...make a sliding latch that is captured by the aluminum > bow that the rear of the lexan lays on...you can make some sort of > prop...to hold the lexan open for entry/exit ...i tended to use my > head... naturally the right side angle is only attached to the > lexan... and it is good to make a stop on the sliding latch such > that is cannot rise up the bow..though the slip stream should be > fine for that... > > Clear as mud? Herb > > my cost is usually the price of the lexan...maybe total of 50 bucks.. > > oops...brakes...I use mountain bike brakes..they come from the > salvage yard on bicycles ...front only usually...meaning that one > side mounts with cable forward and the other side rearword.. > > I turn aluminum spindles to mate the disk to the rim..I have > good luck using the two piece spun rims...they are true... > > The hard part is mounting the caliper...here you need to make an > aluminum plate that slides over the axle and mounts to the 4 holes > in the large washer that is part of the kolb axle..from here it is > a matter of a spacer,trial and error, to get the disk > pad/caliper/disk distance correct. a cromolly tube that slips over > the axle and sets the distance from disk/rim to caliper... is the > spacer.. > > In the pics..notice that I left too much lexan on the left > side..need only be 1/4 inch below the longeron.. > > On 10/07/2016 01:49 PM, chris davis wrote: > > Chris Davis > KXP 503 492 hrs > Glider Pilot > Disabled from crash building Firefly > > On Friday, October 7, 2016 2:34 PM, chris davis > <capedavis@yahoo.com> <mailto:capedavis@yahoo.com> wrote: > > Kolbers i have a couple questions on a Firefly. I flew my > Firestar KXP for 10 years without brakes , had almost no > trouble on the field i fly out of " Chatham Municipal" 3000 ft > asphalt with a full length grass field along side which i used > most of the time but I also went to flyins where there was a > lot of aircraft taking off and landing never had any trouble > as long as I stayed alert and thought ahead! I read most kolb > concerned emails on the list and see that most builders go out > of there way and risk too much weight to install brakes . Are > they necessary ?On a FIREFLY? > > My next question I prefer a full enclosure and I called Kolb > and asked for a price on the full enclosure without the lexan > as I have a local supplier for that the price was $308 ? What > is included ? > > Looking at the Plans all I can see is about $30 dollars worth > of aluminum and a few bolts I think I can build it myself . Is > there somthing I am missing ? Just hoping for some input Chris > > Chris Davis > KXP 503 492 hrs > Glider Pilot > Disabled from crash building Firefly > > -- > > "Masculine republics give way to feminine democracies, and > feminine democracies give way to tyranny." > > Aristotle > > "Daddy, tell me...why are you going to the pig farm for a > reeducation and what does it mean "A basket of deplorables"? "Are > you unreedemable"? And" who is Stalin and Mao Zedong"? Mark > Twain's little girl... > > > -- > "Masculine republics give way to feminine democracies, and feminine > democracies give way to tyranny." > Aristotle > "Daddy, tell me...why are you going to the pig farm for a reeducation > and what does it mean "A basket of deplorables"? "Are you > unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's little > girl... -- "Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny." Aristotle "Daddy, tell me...why are you going to the pig farm for a reeducation and what does it mean "A basket of deplorables"? "Are you unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's GGgranddaughter...


    Message 10


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    Time: 05:56:07 PM PST US
    Subject: Re: Fw: Brakes and full enclosure
    From: Herb <Herbgh@nctc.com>
    Yep...groung handling takes many forms...:-) Herb On 10/10/2016 02:42 PM, John Hauck wrote: > > Brakes are good for lots of stuff: > > -As Herb mentioned, ground handling, especially in high wind.Also nice > to prevent ground looping in high cross wind conditions. > > -Back in the mid 1980s, I landed at Ozark, Alabama, Airport.The gas > pump was downhill from the taxiway.Had to get out of the US and FS > (before I got brakes) and walk the aircraft down to the pump. > > -They are also handy for run up and magcheck. > > Plenty cross wind in Ely, NV.Hard to walk from the truck to McDonalds > for a hamburger.;-) > > john h > > mkIII > > *From:*owner-kolb-list-server@matronics.com > [mailto:owner-kolb-list-server@matronics.com] *On Behalf Of *Herb > *Sent:* Saturday, October 08, 2016 11:59 AM > *To:* kolb-list@matronics.com > *Subject:* Re: Kolb-List: Fw: Brakes and full enclosure > > good for ground handling...mainly...Herb > > On 10/08/2016 11:04 AM, chris davis wrote: > > Herb Thank u for the very complete answer to my full enclosure > question Im sure I can build it for a lot less than $300 that > Kolb asked for it . Your brakes look great but my question was do > I need brakes more on the Firefly than the Firestar? thank u Chris > > Chris Davis > KXP 503 492 hrs > Glider Pilot > Disabled from crash building Firefly > > On Friday, October 7, 2016 8:59 PM, Herb <Herbgh@nctc.com> > <mailto:Herbgh@nctc.com> wrote: > > slow list Chris... > > I have installed full enclosures on two Fireflys...I did a gull > wing enclosure on my MkIII.. > > easy to do...the 1/16 lexan just lays over the nose cone... a > 4x4 sheet works...was 35 to 40 bucks here in Tenn.. Lay the paper > covered lexan over the nose cone and rear bow that you have made > and do a rough marking of the size...over sized a bit but to shape > ..this makes it easy to clamp and handle. Once the shape is made > then move on to mounting..I let the Lexan lay over the nose cone > by about 1 and one half inch..enough to allow the rubber seal to > clear the front of the cone a bit... 1/8th inch...will do.. > > Making the rear bow is not science...just bend it carefully and > try not to go to round such that it is sticking out any further > than need be...Guess your shoulders would dictate the bow > size..Oval is good..toward flat.on the sides.. The top of this bow > is braced by another bow that runs rather horizontal to the > cromolly verticals that attach to the spar carry through..this is > attached to the cromolly tubes with gussets and that tube and rear > bow meet and are gusseted to one another..on the top... > > I install a stop screw and decorative washer at about 10 am.. > thru the lexan to the cone..I raise the lexan up to a comfortable > entry position and install that screw...I also note where the > lexan is on the rear bow and install large head rivets from there > down to the end of the bow on that side(left) I install a powder > coated white angle aluminum on the top of the left longeron and > fasten it in maybe three or 4 places then fasten it to the lexan > from nose to bow I attach it to the bottom of the rear bow but not > to the nose cone....I use the decorative dimpled washer and flush > screws there...then once the lexan is down on the right side...I > mark the paper covering and install white angle aluminum there > also..from nose cone to bow..At the nose end I install a tapered > screw of my own making I flatten or grind it flat and attach it > to the aluminum angle ..I drill a hole in the nose cone bracket > such that the tapered screw fits snugly and holds a good wrap > around the nose cone.. before you do this install the rubber seal > on this end of the lexan..some hold it with silicone but I use the > 3m black weather seal...Trial fit the rubber seal and tape the > lexan on both sides so that the rubber goo that squeezes out of > the seal does not get on the lexan beyond where it is intended to > go...I use good auto paint tape here...Then install the tapered > screw on the angle that is attached same as the angle on the left > side...now...make a sliding latch that is captured by the aluminum > bow that the rear of the lexan lays on...you can make some sort of > prop...to hold the lexan open for entry/exit ...i tended to use my > head... naturally the right side angle is only attached to the > lexan... and it is good to make a stop on the sliding latch such > that is cannot rise up the bow..though the slip stream should be > fine for that... > > Clear as mud? Herb > > my cost is usually the price of the lexan...maybe total of 50 bucks.. > > oops...brakes...I use mountain bike brakes..they come from the > salvage yard on bicycles ...front only usually...meaning that one > side mounts with cable forward and the other side rearword.. > > I turn aluminum spindles to mate the disk to the rim..I have > good luck using the two piece spun rims...they are true... > > The hard part is mounting the caliper...here you need to make an > aluminum plate that slides over the axle and mounts to the 4 holes > in the large washer that is part of the kolb axle..from here it is > a matter of a spacer,trial and error, to get the disk > pad/caliper/disk distance correct. a cromolly tube that slips over > the axle and sets the distance from disk/rim to caliper... is the > spacer.. > > In the pics..notice that I left too much lexan on the left > side..need only be 1/4 inch below the longeron.. > > On 10/07/2016 01:49 PM, chris davis wrote: > > Chris Davis > KXP 503 492 hrs > Glider Pilot > Disabled from crash building Firefly > > On Friday, October 7, 2016 2:34 PM, chris davis > <capedavis@yahoo.com> <mailto:capedavis@yahoo.com> wrote: > > Kolbers i have a couple questions on a Firefly. I flew my > Firestar KXP for 10 years without brakes , had almost no > trouble on the field i fly out of " Chatham Municipal" 3000 ft > asphalt with a full length grass field along side which i used > most of the time but I also went to flyins where there was a > lot of aircraft taking off and landing never had any trouble > as long as I stayed alert and thought ahead! I read most kolb > concerned emails on the list and see that most builders go out > of there way and risk too much weight to install brakes . Are > they necessary ?On a FIREFLY? > > My next question I prefer a full enclosure and I called Kolb > and asked for a price on the full enclosure without the lexan > as I have a local supplier for that the price was $308 ? What > is included ? > > Looking at the Plans all I can see is about $30 dollars worth > of aluminum and a few bolts I think I can build it myself . Is > there somthing I am missing ? Just hoping for some input Chris > > Chris Davis > KXP 503 492 hrs > Glider Pilot > Disabled from crash building Firefly > > -- > > "Masculine republics give way to feminine democracies, and > feminine democracies give way to tyranny." > > Aristotle > > "Daddy, tell me...why are you going to the pig farm for a > reeducation and what does it mean "A basket of deplorables"? "Are > you unreedemable"? And" who is Stalin and Mao Zedong"? Mark > Twain's little girl... > > > -- > "Masculine republics give way to feminine democracies, and feminine > democracies give way to tyranny." > Aristotle > "Daddy, tell me...why are you going to the pig farm for a reeducation > and what does it mean "A basket of deplorables"? "Are you > unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's little > girl... -- "Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny." Aristotle "Daddy, tell me...why are you going to the pig farm for a reeducation and what does it mean "A basket of deplorables"? "Are you unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's GGgranddaughter...


    Message 11


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    Time: 06:07:57 PM PST US
    Subject: Re: Fw: Brakes and full enclosure
    From: Herb <Herbgh@nctc.com>
    haven't had the first brandy!! groung?? On 10/10/2016 07:54 PM, Herb wrote: > > Yep...groung handling takes many forms...:-) Herb > > > On 10/10/2016 02:42 PM, John Hauck wrote: >> >> Brakes are good for lots of stuff: >> >> -As Herb mentioned, ground handling, especially in high wind.Also >> nice to prevent ground looping in high cross wind conditions. >> >> -Back in the mid 1980s, I landed at Ozark, Alabama, Airport.The gas >> pump was downhill from the taxiway.Had to get out of the US and FS >> (before I got brakes) and walk the aircraft down to the pump. >> >> -They are also handy for run up and magcheck. >> >> Plenty cross wind in Ely, NV.Hard to walk from the truck to McDonalds >> for a hamburger.;-) >> >> john h >> >> mkIII >> >> *From:*owner-kolb-list-server@matronics.com >> [mailto:owner-kolb-list-server@matronics.com] *On Behalf Of *Herb >> *Sent:* Saturday, October 08, 2016 11:59 AM >> *To:* kolb-list@matronics.com >> *Subject:* Re: Kolb-List: Fw: Brakes and full enclosure >> >> good for ground handling...mainly...Herb >> >> On 10/08/2016 11:04 AM, chris davis wrote: >> >> Herb Thank u for the very complete answer to my full enclosure >> question Im sure I can build it for a lot less than $300 that >> Kolb asked for it . Your brakes look great but my question was do >> I need brakes more on the Firefly than the Firestar? thank u Chris >> >> Chris Davis >> KXP 503 492 hrs >> Glider Pilot >> Disabled from crash building Firefly >> >> On Friday, October 7, 2016 8:59 PM, Herb <Herbgh@nctc.com> >> <mailto:Herbgh@nctc.com> wrote: >> >> slow list Chris... >> >> I have installed full enclosures on two Fireflys...I did a gull >> wing enclosure on my MkIII.. >> >> easy to do...the 1/16 lexan just lays over the nose cone... a >> 4x4 sheet works...was 35 to 40 bucks here in Tenn.. Lay the paper >> covered lexan over the nose cone and rear bow that you have made >> and do a rough marking of the size...over sized a bit but to >> shape ..this makes it easy to clamp and handle. Once the shape is >> made then move on to mounting..I let the Lexan lay over the nose >> cone by about 1 and one half inch..enough to allow the rubber >> seal to clear the front of the cone a bit... 1/8th inch...will do.. >> >> Making the rear bow is not science...just bend it carefully and >> try not to go to round such that it is sticking out any further >> than need be...Guess your shoulders would dictate the bow >> size..Oval is good..toward flat.on the sides.. The top of this >> bow is braced by another bow that runs rather horizontal to the >> cromolly verticals that attach to the spar carry through..this is >> attached to the cromolly tubes with gussets and that tube and >> rear bow meet and are gusseted to one another..on the top... >> >> I install a stop screw and decorative washer at about 10 am.. >> thru the lexan to the cone..I raise the lexan up to a >> comfortable entry position and install that screw...I also note >> where the lexan is on the rear bow and install large head rivets >> from there down to the end of the bow on that side(left) I >> install a powder coated white angle aluminum on the top of the >> left longeron and fasten it in maybe three or 4 places then >> fasten it to the lexan from nose to bow I attach it to the bottom >> of the rear bow but not to the nose cone....I use the decorative >> dimpled washer and flush screws there...then once the lexan is >> down on the right side...I mark the paper covering and install >> white angle aluminum there also..from nose cone to bow..At the >> nose end I install a tapered screw of my own making I flatten or >> grind it flat and attach it to the aluminum angle ..I drill a >> hole in the nose cone bracket such that the tapered screw fits >> snugly and holds a good wrap around the nose cone.. before you do >> this install the rubber seal on this end of the lexan..some hold >> it with silicone but I use the 3m black weather seal...Trial fit >> the rubber seal and tape the lexan on both sides so that the >> rubber goo that squeezes out of the seal does not get on the >> lexan beyond where it is intended to go...I use good auto paint >> tape here...Then install the tapered screw on the angle that is >> attached same as the angle on the left side...now...make a >> sliding latch that is captured by the aluminum bow that the rear >> of the lexan lays on...you can make some sort of prop...to hold >> the lexan open for entry/exit ...i tended to use my head... >> naturally the right side angle is only attached to the lexan... >> and it is good to make a stop on the sliding latch such that is >> cannot rise up the bow..though the slip stream should be fine for >> that... >> >> Clear as mud? Herb >> >> my cost is usually the price of the lexan...maybe total of 50 >> bucks.. >> >> oops...brakes...I use mountain bike brakes..they come from the >> salvage yard on bicycles ...front only usually...meaning that one >> side mounts with cable forward and the other side rearword.. >> >> I turn aluminum spindles to mate the disk to the rim..I have >> good luck using the two piece spun rims...they are true... >> >> The hard part is mounting the caliper...here you need to make an >> aluminum plate that slides over the axle and mounts to the 4 >> holes in the large washer that is part of the kolb axle..from >> here it is a matter of a spacer,trial and error, to get the disk >> pad/caliper/disk distance correct. a cromolly tube that slips >> over the axle and sets the distance from disk/rim to caliper... >> is the spacer.. >> >> In the pics..notice that I left too much lexan on the left >> side..need only be 1/4 inch below the longeron.. >> >> On 10/07/2016 01:49 PM, chris davis wrote: >> >> Chris Davis >> KXP 503 492 hrs >> Glider Pilot >> Disabled from crash building Firefly >> >> On Friday, October 7, 2016 2:34 PM, chris davis >> <capedavis@yahoo.com> <mailto:capedavis@yahoo.com> wrote: >> >> Kolbers i have a couple questions on a Firefly. I flew my >> Firestar KXP for 10 years without brakes , had almost no >> trouble on the field i fly out of " Chatham Municipal" 3000 >> ft asphalt with a full length grass field along side which i >> used most of the time but I also went to flyins where there >> was a lot of aircraft taking off and landing never had any >> trouble as long as I stayed alert and thought ahead! I read >> most kolb concerned emails on the list and see that most >> builders go out of there way and risk too much weight to >> install brakes . Are they necessary ?On a FIREFLY? >> >> My next question I prefer a full enclosure and I called Kolb >> and asked for a price on the full enclosure without the lexan >> as I have a local supplier for that the price was $308 ? What >> is included ? >> >> Looking at the Plans all I can see is about $30 dollars >> worth of aluminum and a few bolts I think I can build it >> myself . Is there somthing I am missing ? Just hoping for >> some input Chris >> >> Chris Davis >> KXP 503 492 hrs >> Glider Pilot >> Disabled from crash building Firefly >> >> -- >> >> "Masculine republics give way to feminine democracies, and >> feminine democracies give way to tyranny." >> >> Aristotle >> >> "Daddy, tell me...why are you going to the pig farm for a >> reeducation and what does it mean "A basket of deplorables"? "Are >> you unreedemable"? And" who is Stalin and Mao Zedong"? Mark >> Twain's little girl... >> >> >> >> -- >> "Masculine republics give way to feminine democracies, and feminine >> democracies give way to tyranny." >> Aristotle >> "Daddy, tell me...why are you going to the pig farm for a reeducation >> and what does it mean "A basket of deplorables"? "Are you >> unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's >> little girl... > > -- > "Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny." > > Aristotle > > "Daddy, tell me...why are you going to the pig farm for a reeducation and what does it mean "A basket of deplorables"? "Are you unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's GGgranddaughter... -- "Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny." Aristotle "Daddy, tell me...why are you going to the pig farm for a reeducation and what does it mean "A basket of deplorables"? "Are you unreedemable"? And" who is Stalin and Mao Zedong"? Mark Twain's GGgranddaughter...


    Message 12


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    Time: 06:31:34 PM PST US
    From: Larry Cottrell <lcottrell1020@gmail.com>
    Subject: Re: More HKS Engine Interference Questions
    Stuart thanks for the reminder. I forgot a few things. As far as I can tell the engine plate is a standard one from Kolb. I know that it fits a 503 as well as the HKS. The HKS bolts are 3 1/4 inches forward on the plate, and seem to be centered equally. I also got a prop extension from Rick that I like a lot. It is 2 1/2 inches long. Larry


    Message 13


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    Time: 11:12:22 PM PST US
    From: Bill Berle <victorbravo@sbcglobal.net>
    Subject: Re: More HKS Engine Interference Questions
    Thank you Larry and Kolb List'ers for the responses. Larry I did remember you told me you had two inch spacers... however I measured my installation, and going from the one inch spacers (what I have now) to two inch spacers (what you have) will still not raise the exhaust pipe UPWARD enough to clear the trailing edge tube of the wing (even with the aileron swung out of the way). The problem is only with the wings folded back for storage or trailering. There's PLENTY of clearance in flying configuration. Because of the offset between right and left cylinders on an opposed engine, the left wing is a bigger interference problem than the right wing. The engine might have to go forward, and that means I will have to use a prop extension so the prop doesn't hit the rear of the steel cage. Does anyone know whether I can use a 3 or 4 inch extension on the HKS without putting too much load on the crankshaft or main bearings? Thank you guys for helping solve this problem. Does any one know whether David Bigelow (HKS powered Firestar 2 in Hawaii) is still flying or participating in this group? Bill Berle www.ezflaphandle.com - safety & performance upgrade for light aircraft www.grantstar.net - winning proposals for non-profit and for-profit entities -------------------------------------------- On Mon, 10/10/16, Larry Cottrell <lcottrell1020@gmail.com> wrote: Subject: Re: Kolb-List: More HKS Engine Interference Questions To: "kolb-list@matronics.com" <kolb-list@matronics.com> Date: Monday, October 10, 2016, 4:48 PM So the question is... how high can the propeller thrust line be on a Kolb Firestar 2 without causing a change in the aircraft handling? Bill Berle -------- Since I am one of the few that have an HKS, I guess that I will have to tell you again that I have mine with 2 inch risers, swing a 66 inch prop giving me about 3/4 of an inch clearance. As to your question about how high- I cannot tell you that as I have not gone there as of yet. I can tell you that my wings will fold by turning the ailerons in the extended position when it is folded. I can also tell you that with the engine set the way that it is, when I give it full throttle the plane climbs without my influence on the stick. So apparently I have not raised it too high yet. I once rode in a Mark three that when full throttle was applied the plane dived without stick up pressure. It scared me!Larry


    Message 14


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    Time: 11:28:32 PM PST US
    From: Bill Berle <victorbravo@sbcglobal.net>
    Subject: Re: More HKS Engine Interference Questions
    I may have found the problem why Larry's installation is different than mine ! The hotos he was kind enough tos end show exhaust pipes that are NOT separated just past the exhaust port. Mine have a break, with a "Swivel joint" and springs, just 2 inches outside of the exhaust port. These undoubtedly take up more room, and make the exhaust pipe hang down a couple of inches lower under the engine, than Larry's "solid, no swivel/spring joint" system. So in order to have the thrust line in the best possible position (so I can get the great Kolb handling that I've been hearing about), I may wind up having to make up a new exhaust system that takes up less space, or routes the exhaust pipes a different direction, etc.. Bill Berle www.ezflaphandle.com - safety & performance upgrade for light aircraft www.grantstar.net - winning proposals for non-profit and for-profit entities -------------------------------------------- On Mon, 10/10/16, Larry Cottrell <lcottrell1020@gmail.com> wrote: Subject: Re: Kolb-List: More HKS Engine Interference Questions To: "kolb-list@matronics.com" <kolb-list@matronics.com> Date: Monday, October 10, 2016, 4:48 PM So the question is... how high can the propeller thrust line be on a Kolb Firestar 2 without causing a change in the aircraft handling? Bill Berle -------- Since I am one of the few that have an HKS, I guess that I will have to tell you again that I have mine with 2 inch risers, swing a 66 inch prop giving me about 3/4 of an inch clearance. As to your question about how high- I cannot tell you that as I have not gone there as of yet. I can tell you that my wings will fold by turning the ailerons in the extended position when it is folded. I can also tell you that with the engine set the way that it is, when I give it full throttle the plane climbs without my influence on the stick. So apparently I have not raised it too high yet. I once rode in a Mark three that when full throttle was applied the plane dived without stick up pressure. It scared me!Larry




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