Kitfox-List Digest Archive

Tue 04/12/11


Total Messages Posted: 15



Today's Message Index:
----------------------
 
     1. 05:03 AM - Re: Tire pressure (Catz631@aol.com)
     2. 05:35 AM - Re: tire pressure (Jack L Bell)
     3. 12:04 PM - Model IV Speedster Extensions (Dwayne McCourt)
     4. 01:56 PM - Re: Decisions: Advice please (Grant Bright)
     5. 03:27 PM - Re: Decisions: Advice please (Jose M. Toro)
     6. 04:11 PM - Re: Decisions: Advice please (Patrick Reilly)
     7. 04:25 PM - Re: tire pressure (Patrick Reilly)
     8. 04:36 PM - Re: Tire pressure (Patrick Reilly)
     9. 04:58 PM - Re: tire pressure (Paul Franz - Merlin GT)
    10. 05:15 PM - Re: tire pressure (Patrick Reilly)
    11. 05:58 PM - Re: tire pressure (Paul Franz - Merlin GT)
    12. 06:27 PM - Re: Tire pressure (dave)
    13. 10:12 PM - Re: tire pressure (Dwayne McCourt)
    14. 10:59 PM - Re: Decisions: Advice please (Guy Buchanan)
    15. 11:01 PM - Re: tire pressure (Paul Franz - Merlin GT)
 
 
 


Message 1


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    Time: 05:03:03 AM PST US
    From: Catz631@aol.com
    Subject: Re: Tire pressure
    Paul and Pat, I operate off of grass and pavement. I find it easier to turn on the grass with a little more air pressure (ie;aprox 10 lbs) My tires were installed on the rims with rim adhesive which helps hold the tires to the rims and help to prevent air loss,although I still have to top up from time to time. Prior posts on this site (about a year ago) had mentioned shearing of the inflation valve with movement of the tire on the rim and that is why I use 10 lbs of pressure ,as recommended by the posters. This has worked well for me. Dick Maddux Milton,Fl


    Message 2


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    Time: 05:35:02 AM PST US
    From: Jack L Bell <jack@comconn.com>
    Subject: Re: tire pressure
    I did all of my training in a Kitfox I on pavement. I did find that lower tire pressure made a world of difference in landings, and I also wore out a set of tires fairly quickly. I found replacement carlisle tires at the local tractor supply, and had them mounted at a lawnmower repair shop. The original builder of the plane had drilled the lip of the rim and used a short, maybe #12 stainless metal screw in three places, which ran into, not through, the bead of the tire. Rather than explain, I took the screws out before having the tire mounted, and put them back in myself. Never spun the tire, even when I landed with a flat (I hate mesquite thorns!). And, yes, I always run tubes. -Jack Austin, TX Avid MK IV, Jabiru 22AX01 (flying) Avid Catalina Hirth F30 (building) > > > Time: 08:40:12 PM PST US > Subject: Re: Kitfox-List: Tire pressure > From: "Paul Franz - Merlin GT" <paul@eucleides.com> > > > On Mon, April 11, 2011 4:40 pm, Patrick Reilly wrote: > > Dick, I am on the grass and dirt and used 5 1/2 # today successfully. I will > > increase the pressure to 9 or 10 pounds if I am going to land on a paved > > runway to avoid spinning a tire on the rim. Thanks for the advice. > > I have a couple of thoughts on this. > > 1) Are rim locks like the ones used on motocross bikes feasible and available? > > 2) The maximum possible braking effort is reduced with larger diameter tires compared > to the same brakes with smaller diameter tires. If the wheels are also larger, > then > the shear stress is reduced (the stress that causes the tire to slip on the wheel) > so > this would also contribute to a lower tire pressure required. > > 3) Isn't it true that the biggest risk of slipping the tire on the wheel is hard > braking on a surface the tire can't slide on? And aren't runways that are paved > mostly > so long you don't need to use the brakes at all? > > 4) I accidentally deleted the e-mail but didn't someone suggest some kind of an > available guard so that the inner tube can't slip or something protects the valve > stem > from shearing off? > > 5) I assume that large low pressure tires require innertubes. > > > -- > Paul A. Franz > Registration/Aircraft - N14UW/Merlin GT > Engine/Prop - Rotax 914/NSI CAP > Bellevue WA > Office 425.440.9505 > 425.241.1618 Cell >


    Message 3


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    Time: 12:04:36 PM PST US
    From: Dwayne McCourt <dwaynemccourt@yahoo.com>
    Subject: Model IV Speedster Extensions
    Would someone please email me the plans for the Model IV Speedster wing extensions???? I have a nice 912 Speedster which I hope to add the wing extensions and fat tires............. any help with either would be appreciated!!!!!!!!!!!!


    Message 4


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    Time: 01:56:15 PM PST US
    From: "Grant Bright" <grantbright@att.net>
    Subject: Re: Decisions: Advice please
    Thanks to Guy, and Dave, and others... for your comments. I am narrowing it down ... the economy is certainly a factor ... looks like a KF2 may be the answer. Is the grayhead 582 and its gearbox the good one? I think I have read the blue head is later/better...but gray is what I am looking at. The one I am looking at has the Ducati ignition ... alternator size is not known, but it will run the vhf radio and wing tip strobes. Since Ducati has been around a long time ... I am guessing these systems are reliable? Thanks, Grant


    Message 5


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    Time: 03:27:19 PM PST US
    From: "Jose M. Toro" <jose_m_toro@yahoo.com>
    Subject: Re: Decisions: Advice please
    Grant:=0A=0AI had a KF II with a gray head.- I was extremely pleased with the performance.- =0AShort takeoff and landing, and 70 mph cruise.-How ever, when it was time for =0Arecovering, I decided to sell it (to a friend of mine).- I'm glad my friend let =0Ame fly it.- I still love this pla ne, specially the folding wings.- =0A=0A=0AJose Toro=0A=0A=0A=0A=0A______ __________________________=0AFrom: Grant Bright <grantbright@att.net>=0ATo: kitfox-list@matronics.com=0ASent: Tue, April 12, 2011 4:53:49 PM=0ASubject : Re: Kitfox-List: Decisions: Advice please=0A=0A--> Kitfox-List message po sted by: "Grant Bright" <grantbright@att.net>=0A=0AThanks to Guy, and Dave, and others... for your comments.=0A=0AI am narrowing it down ... the econo my is certainly a factor ... looks like a =0AKF2 may be the answer.=0A=0AIs the grayhead 582 and its gearbox the good one? I think I have read the blu e =0Ahead is later/better...but gray is what I am looking at.=0A=0AThe one I am looking at has the Ducati ignition ... alternator size is not =0Aknown , but it will run the vhf radio and wing tip strobes.=0A=0ASince Ducati has been around a long time ... I am guessing these systems are =0Areliable? ========================


    Message 6


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    Time: 04:11:46 PM PST US
    Subject: Re: Decisions: Advice please
    From: Patrick Reilly <patreilly43@gmail.com>
    Grant, I have a mod 3 with 582 grey head with 135 hrs on it. I bought the engine FWF with 100 hrs on it to put in the plane. The plane had been hit by a car and the original Rotax 912 engine had been sold. The 582 with the C box that I have is alot of bang for the buck. Very reliable setup and good performance. I haven't flown any other Kitfox so maybe I don't have valid opinion but, again, I think the 582 with a C box is a good Kitfox power source through mod 4. Pat Reilly Mod 3 582 Rebuilt Rockford, IL On Tue, Apr 12, 2011 at 5:24 PM, Jose M. Toro <jose_m_toro@yahoo.com> wrote: > Grant: > > I had a KF II with a gray head. I was extremely pleased with the > performance. Short takeoff and landing, and 70 mph cruise. However, when it > was time for recovering, I decided to sell it (to a friend of mine). I'm > glad my friend let me fly it. I still love this plane, specially the > folding wings. > > Jose Toro > > ------------------------------ > *From:* Grant Bright <grantbright@att.net> > *To:* kitfox-list@matronics.com > *Sent:* Tue, April 12, 2011 4:53:49 PM > *Subject:* Re: Kitfox-List: Decisions: Advice please > > > Thanks to Guy, and Dave, and others... for your comments. > > I am narrowing it down ... the economy is certainly a factor ... looks like > a KF2 may be the answer. > > Is the grayhead 582 and its gearbox the good one? I think I have read the > blue head is later/better...but gray is what I am looking at. > > The one I am looking at has the Ducati ignition ... alternator size is not > known, but it will run the vhf radio and wing tip strobes. > > Since Ducati has been around a long time ... I am guessing these systems > are reliable? > > Thanks, Grant > > > * > > * > > -- Pat Reilly Mod 3 582 Rebuild Rockford,IL


    Message 7


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    Time: 04:25:46 PM PST US
    Subject: Re: tire pressure
    From: Patrick Reilly <patreilly43@gmail.com>
    Jack, I was considering putting screws in the bead. I have seen that done on dirt bikes. I will do it to my Nanco tires. Wonder if I can do it with out dismounting the tire. I guess it would be easy to stop short of drilling all the way thru and run a sheet metal screw in. You didn't state what pressure you ran in the tires. Pat Reilly Mod 3 582 Rebuilt. Rockford,IL On Tue, Apr 12, 2011 at 7:29 AM, Jack L Bell <jack@comconn.com> wrote: > > > I did all of my training in a Kitfox I on pavement. > I did find that lower tire pressure made a world of difference > in landings, and I also wore out a set of tires fairly > quickly. I found replacement carlisle tires at the local > tractor supply, and had them mounted at a lawnmower > repair shop. > > The original builder of the plane had drilled the lip of the rim > and used a short, maybe #12 stainless metal screw in three places, > which ran into, not through, the bead of the tire. Rather than > explain, I took the screws out before having the tire mounted, > and put them back in myself. Never spun the tire, even when > I landed with a flat (I hate mesquite thorns!). > > And, yes, I always run tubes. > > -Jack > Austin, TX > Avid MK IV, Jabiru 22AX01 (flying) > Avid Catalina Hirth F30 (building) > > > > > > > > Time: 08:40:12 PM PST US > > Subject: Re: Kitfox-List: Tire pressure > > From: "Paul Franz - Merlin GT" <paul@eucleides.com> > > > > > > On Mon, April 11, 2011 4:40 pm, Patrick Reilly wrote: > > > Dick, I am on the grass and dirt and used 5 1/2 # today successfully. I > will > > > increase the pressure to 9 or 10 pounds if I am going to land on a > paved > > > runway to avoid spinning a tire on the rim. Thanks for the advice. > > > > I have a couple of thoughts on this. > > > > 1) Are rim locks like the ones used on motocross bikes feasible and > available? > > > > 2) The maximum possible braking effort is reduced with larger diameter > tires compared > > to the same brakes with smaller diameter tires. If the wheels are also > larger, > > then > > the shear stress is reduced (the stress that causes the tire to slip on > the wheel) > > so > > this would also contribute to a lower tire pressure required. > > > > 3) Isn't it true that the biggest risk of slipping the tire on the wheel > is hard > > braking on a surface the tire can't slide on? And aren't runways that are > paved > > mostly > > so long you don't need to use the brakes at all? > > > > 4) I accidentally deleted the e-mail but didn't someone suggest some kind > of an > > available guard so that the inner tube can't slip or something protects > the valve > > stem > > from shearing off? > > > > 5) I assume that large low pressure tires require innertubes. > > > > > > -- > > Paul A. Franz > > Registration/Aircraft - N14UW/Merlin GT > > Engine/Prop - Rotax 914/NSI CAP > > Bellevue WA > > Office 425.440.9505 > > 425.241.1618 Cell > > > > -- Pat Reilly Mod 3 582 Rebuild Rockford,IL


    Message 8


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    Time: 04:36:55 PM PST US
    Subject: Re: Tire pressure
    From: Patrick Reilly <patreilly43@gmail.com>
    Paul, IIt appears all of your suppositions are correct. I think the tube valves can be ripped off no matter what precautions you take if the tire spins on the rim. Thanks for reminding me that the braking force the brakes exert is less with the larger tires. My brakes work fine, but they would be more powerful with smaller tires. Rim locks that are used on dirt bikes could work. But, screws thru the rim into the bead are as effective and much easier to install. Pat Reilly Mod 3 582 Rebuilt Rockford, IL On Mon, Apr 11, 2011 at 10:36 PM, Paul Franz - Merlin GT <paul@eucleides.com > wrote: > paul@eucleides.com> > > On Mon, April 11, 2011 4:40 pm, Patrick Reilly wrote: > > Dick, I am on the grass and dirt and used 5 1/2 # today successfully. I > will > > increase the pressure to 9 or 10 pounds if I am going to land on a paved > > runway to avoid spinning a tire on the rim. Thanks for the advice. > > I have a couple of thoughts on this. > > 1) Are rim locks like the ones used on motocross bikes feasible and > available? > > 2) The maximum possible braking effort is reduced with larger diameter > tires compared > to the same brakes with smaller diameter tires. If the wheels are also > larger, then > the shear stress is reduced (the stress that causes the tire to slip on the > wheel) so > this would also contribute to a lower tire pressure required. > > 3) Isn't it true that the biggest risk of slipping the tire on the wheel is > hard > braking on a surface the tire can't slide on? And aren't runways that are > paved mostly > so long you don't need to use the brakes at all? > > 4) I accidentally deleted the e-mail but didn't someone suggest some kind > of an > available guard so that the inner tube can't slip or something protects the > valve stem > from shearing off? > > 5) I assume that large low pressure tires require innertubes. > > > -- > Paul A. Franz > Registration/Aircraft - N14UW/Merlin GT > Engine/Prop - Rotax 914/NSI CAP > Bellevue WA > Office 425.440.9505 > 425.241.1618 Cell > > In general, the art of government consists of taking as much money as > possible from > one party of the citizens to give to the other. > -- Voltaire (1764) > > -- Pat Reilly Mod 3 582 Rebuild Rockford,IL


    Message 9


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    Time: 04:58:18 PM PST US
    Subject: Re: tire pressure
    From: "Paul Franz - Merlin GT" <paul@eucleides.com>
    On Tue, April 12, 2011 4:17 pm, Patrick Reilly wrote: > Jack, I was considering putting screws in the bead. I have seen that done on > dirt bikes. I will do it to my Nanco tires. Wonder if I can do it with out > dismounting the tire. I guess it would be easy to stop short of drilling all > the way thru and run a sheet metal screw in. You didn't state what pressure > you ran in the tires. Pat, I think that is a great idea. I'm kind of a perfectionist or worrier depending on your perspective but I would dismount the tire before drilling the wheel so you can measure and judge where the best place would be for the screws to penetrate the tire bead. Then I would *NOT* drill a pilot hole into the tire. Here's my thinking. Drilling will remove material and possibly damage connective fibers whereas sinking a sheet metal screw no more than 3/4ths of the depth of the tire bead will make it tighter on the screw and hopefully spread the fibers, not cut them. Of course, this is my judgement and perception, not based on any actual experience. -- Paul A. Franz Registration/Aircraft - N14UW/Merlin GT Engine/Prop - Rotax 914/NSI CAP Bellevue WA Office 425.440.9505 425.241.1618 Cell In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)


    Message 10


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    Time: 05:15:37 PM PST US
    Subject: Re: tire pressure
    From: Patrick Reilly <patreilly43@gmail.com>
    Paul, I bet I can do it with the tire on the rim. I won't drill all the way thru the rim. I'll stop short of hitting the tire and run a sheet metal screw thru whats left of the aluminum rim. It would be nice to see how thick the bead is to choose what length of screw to use. I would guess 1/2" # 10 sheet metal screw would do it. I just remembered I did this on a dirt bile years ago. But, I had drilled and measured the bead before mounting the tire. Pat Reilly Mod 3 582 Rebuilt Rockford, IL On Tue, Apr 12, 2011 at 6:55 PM, Paul Franz - Merlin GT <paul@eucleides.com>wrote: > paul@eucleides.com> > > On Tue, April 12, 2011 4:17 pm, Patrick Reilly wrote: > > Jack, I was considering putting screws in the bead. I have seen that done > on > > dirt bikes. I will do it to my Nanco tires. Wonder if I can do it with > out > > dismounting the tire. I guess it would be easy to stop short of drilling > all > > the way thru and run a sheet metal screw in. You didn't state what > pressure > > you ran in the tires. > > Pat, > > I think that is a great idea. I'm kind of a perfectionist or worrier > depending on your > perspective but I would dismount the tire before drilling the wheel so you > can measure > and judge where the best place would be for the screws to penetrate the > tire bead. > Then I would *NOT* drill a pilot hole into the tire. Here's my thinking. > Drilling will > remove material and possibly damage connective fibers whereas sinking a > sheet metal > screw no more than 3/4ths of the depth of the tire bead will make it > tighter on the > screw and hopefully spread the fibers, not cut them. > > Of course, this is my judgement and perception, not based on any actual > experience. > > -- > Paul A. Franz > Registration/Aircraft - N14UW/Merlin GT > Engine/Prop - Rotax 914/NSI CAP > Bellevue WA > Office 425.440.9505 > 425.241.1618 Cell > > In general, the art of government consists of taking as much money as > possible from > one party of the citizens to give to the other. > -- Voltaire (1764) > > -- Pat Reilly Mod 3 582 Rebuild Rockford,IL


    Message 11


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    Time: 05:58:49 PM PST US
    Subject: Re: tire pressure
    From: "Paul Franz - Merlin GT" <paul@eucleides.com>
    On Tue, April 12, 2011 5:11 pm, Patrick Reilly wrote: > Paul, I bet I can do it with the tire on the rim. I won't drill all the way > thru the rim. I'll stop short of hitting the tire and run a sheet metal > screw thru whats left of the aluminum rim. It would be nice to see how thick > the bead is to choose what length of screw to use. I would guess 1/2" # 10 > sheet metal screw would do it. I just remembered I did this on a dirt bile > years ago. But, I had drilled and measured the bead before mounting the > tire. I'm a bit more patient in my old age having been beat up so many times by short cut decisions. I would want the best hole location and to know exactly how thick the rim is and the thickness of the bead at the point where the screw penetrates. Of course, you may already know that information from working with the tires and wheels. -- Paul A. Franz Registration/Aircraft - N14UW/Merlin GT Engine/Prop - Rotax 914/NSI CAP Bellevue WA Office 425.440.9505 425.241.1618 Cell In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)


    Message 12


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    Time: 06:27:00 PM PST US
    Subject: Re: Tire pressure
    From: "dave" <dave@cfisher.com>
    5 1/2 " likely a bit low if your guage accurate but it ands nice extra softness to take out the bumps. You plane will feel quite a bit differnt on pavement than on grass. Grass a lot more forgiving. If you use tubes -even more worry of tearing off a valve stem. With no tubes the tires might slip but you will un-likely be able to get the bead to break-- These Atv wheels hold them quite well. btw - anyone got a set of wheels for sale with brakes? -------- Rotax Dealer, Ontario Canada http://www.cfisher.com/ http://www.kitfoxflyer.com/ http://rotaxaircraft.com/forum/ Realtime Kitfox movies to separate the internet chatter from the truth http://www.youtube.com/user/kitfoxflyer Read this topic online here: http://forums.matronics.com/viewtopic.php?p=336772#336772


    Message 13


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    Time: 10:12:28 PM PST US
    From: Dwayne McCourt <dwaynemccourt@yahoo.com>
    Subject: Re: tire pressure
    HELLLLLLOOOOOOO? Did anyone see my initial post? - - --- On Wed, 4/13/11, Paul Franz - Merlin GT <paul@eucleides.com> wrote: From: Paul Franz - Merlin GT <paul@eucleides.com> Subject: Re: Kitfox-List: tire pressure .com> On Tue, April 12, 2011 5:11 pm, Patrick Reilly wrote: > Paul, I bet I can do it with the tire on the rim. I won't drill all the w ay > thru the rim. I'll stop short of hitting the tire and run a sheet metal > screw thru whats left of the aluminum rim. It would be nice to see how th ick > the bead is to choose what length of screw to use. I would guess 1/2" # 1 0 > sheet metal screw would do it. I just remembered I did this on a dirt bil e > years ago. But, I had drilled and measured the bead before mounting the > tire. I'm a bit more patient in my old age having been beat up so many times by s hort cut decisions. I would want the best hole location and to know exactly how thic k the rim is and the thickness of the bead at the point where the screw penetrates. O f course, you may already know that information from working with the tires and wheel s. -- Paul A. Franz Registration/Aircraft - N14UW/Merlin GT Engine/Prop - Rotax 914/NSI CAP Bellevue WA Office 425.440.9505 425.241.1618 Cell In general, the art of government consists of taking as much money as possi ble from one party of the citizens to give to the other. -- Voltaire (1764) le, List Admin. =0A=0A=0A


    Message 14


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    Time: 10:59:18 PM PST US
    From: Guy Buchanan <gebuchanan@cox.net>
    Subject: Re: Decisions: Advice please
    On 4/12/2011 1:53 PM, Grant Bright wrote: > Is the grayhead 582 and its gearbox the good one? I think I have read > the blue head is later/better...but gray is what I am looking at. The only thing I did to my gray head was to upgrade the crank. This I did because I fully planned to run it well past TBO. I ran it to 460 hours and planned to run it to 600 hours before TBO based on the South African experience. As far as I can tell there's no reason to upgrade either the rotary valve seal or the cooling system. > > The one I am looking at has the Ducati ignition ... alternator size is > not known, but it will run the vhf radio and wing tip strobes. It will push 12 amps, not a lot more. I'd check out LED strobes. > > Since Ducati has been around a long time ... I am guessing these > systems are reliable? HA! Not on your life. The voltage regulators are, shall we say, questionable, particularly forward of the firewall. They're also noisy aft of the firewall. I replaced mine with a Key West and had no further trouble. The ignition systems work reliably, but you have to be careful with the wiring, both in and out, and make sure it's well supported against fatigue. Guy Buchanan Ramona, CA Kitfox IV-1200 / 592-C / Warp 3cs / 500 hrs. and grounded


    Message 15


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    Time: 11:01:36 PM PST US
    Subject: Re: tire pressure
    From: "Paul Franz - Merlin GT" <paul@eucleides.com>
    On Tue, April 12, 2011 10:09 pm, Dwayne McCourt wrote: > HELLLLLLOOOOOOO? Did anyone see my initial post? > You've made 12 total posts. <http://forums.matronics.com/search.php?search_author=Dwayne> Which one are you referring to? -- Paul A. Franz Registration/Aircraft - N14UW/Merlin GT Engine/Prop - Rotax 914/NSI CAP Bellevue WA Office 425.440.9505 425.241.1618 Cell In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)




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