Kolb-List Digest Archive

Fri 07/06/07


Total Messages Posted: 23



Today's Message Index:
----------------------
 
     1. 04:12 AM - Re: Re: Federal Regulations, WAS Kolb Firefly (Dana Hague)
     2. 04:41 AM - Re: Builders Plans (Rick Lewis)
     3. 05:06 AM - Re: Re: Federal Regulations, WAS Kolb Firefly (robert bean)
     4. 06:02 AM - Re: Legal FireFly??or not?? (Guy Morgan)
     5. 06:55 AM - Re: Federal Funding...now xpndr cert. (planecrazzzy)
     6. 07:00 AM - Re: Builders Plans (Rex Rodebush)
     7. 07:58 AM - Re: Federal Regulations, WAS Kolb Firefly (George Alexander)
     8. 03:23 PM - E LSA vs E AB (davenagy)
     9. 04:42 PM - Re: E LSA vs E AB (Richard Girard)
    10. 05:33 PM - fuel problem I think? (Arksey@aol.com)
    11. 05:39 PM - Re: E LSA vs E AB (davenagy)
    12. 06:01 PM - Re: fuel problem I think? (planecrazzzy)
    13. 06:07 PM - Re: fuel problem I think? (Jim Kmet)
    14. 06:18 PM - Re: fuel problem I think? (beauford T)
    15. 07:05 PM - Re: Re: fuel problem I think? (Arksey@aol.com)
    16. 07:10 PM - Re: fuel problem I think? (Arksey@aol.com)
    17. 07:11 PM - New FireFly Tail Wheel Spring System (Jack B. Hart)
    18. 07:12 PM - Re: fuel problem I think? (Arksey@aol.com)
    19. 08:01 PM - Re: fuel problem I think? (ElleryWeld@aol.com)
    20. 08:18 PM - Re: New FireFly Tail Wheel Spring System (WhiskeyVictor36@aol.com)
    21. 08:26 PM - Re: fuel problem I think? (WhiskeyVictor36@aol.com)
    22. 09:05 PM - Re: fuel problem I think? (Larry Cottrell)
    23. 11:53 PM - Re: fuel problem I think? (Tony Oldman)
 
 
 


Message 1


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    Time: 04:12:55 AM PST US
    From: Dana Hague <d-m-hague@comcast.net>
    Subject: Re: Federal Regulations, WAS Kolb Firefly
    At 10:57 PM 7/5/2007, R. Hankins wrote: >I believe that Sport Pilot was more a response to EAA pressure to allow >thousands of aging pilots to fly without a medical, than an effort at >public protection... There was also pressure on FAA to end "rulemaking by exemption", which was what the BFI program was. -Dana -- -- The only correct outcome to an armed robbery attempt is a dead armed robber.


    Message 2


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    Time: 04:41:40 AM PST US
    Subject: Re: Builders Plans
    From: "Rick Lewis" <cktman@hughes.net>
    Thanks everyone for the feed back on the plans. Donnie and Travis are pretty upset about them also. I can see why there upset sence it's out of there hands and can't change them thereselves. They work so hard with everyone and will go out of there way to make the customer happy but yet here's something out of there control. I know most of you don't live close enough to the factory to visit and get to know them but even when you talk with them at the fly-in's you leave with a good feeling about the plane and Kolb Factory. I've got my kit now and kinda figured out the plans so I'm ready to start. I really don't exspect any problems but I know if I have questions or get confused, I have this forum and the guy's at Kolb. :D Read this topic online here: http://forums.matronics.com/viewtopic.php?p=122491#122491


    Message 3


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    Time: 05:06:16 AM PST US
    From: robert bean <slyck@frontiernet.net>
    Subject: Re: Federal Regulations, WAS Kolb Firefly
    re: homeland security....... I don't see how being registered makes an aircraft less of a security threat (note, I'm not personally very concerned about "terrerists") Any gravity flow fuel aircraft like a skyhawk can be ferried away with a couple of snips with sidecutters. No electric necessary. BB DEFINITELY do not archive


    Message 4


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    Time: 06:02:05 AM PST US
    From: "Guy Morgan" <morganguy@hotmail.com>
    Subject: Re: Legal FireFly??or not??
    Howdy Fellas, If you're selling the Firefly, you can always put the OEM items back on I.e. small tires, minimal instrument panel, etc. Get it legal and include the "extras" with the sale. A firefly built by the books, with attention to the paint especially, should easily fall within limits. Best Regards, Guy Morgan Evergreen Helicopters 2001 Terminal Dr. Galveston, TX 77554 work: (409) 740-0231 cell: (409) 692-2864 ----- Original Message ----- From: "Don G" <donghe@one-eleven.net> Sent: Thursday, July 05, 2007 6:50 PM Subject: Kolb-List: Legal FireFly??or not?? > > Jimmy, > Back to your question about the worth of a "fat" firefly. > > What would it cost to bring it back under 103 compliance?..add that to the > equasion. More than registering it? > > this is what I think...not what I know..just what I think...maybeee... > > A legal 103 FireFly might have more value than a non-registered "fat" one. > > A 503 Firestar that never had a chance of making 254 lbs unless you left > the wing off...will be worth more legal as an E-LSA than not. > Same with Challengers and 503 Titan I's and so on. > > There is no "NEW " rule that makes all fat ultralites now illegal,,,they > always were. They were all required to be registered as an Experimental > before...now there is just a new rule that allows them to be easily > "transitioned" to a E-LSA. > This is the "manna from above" as just someone mentioned. > No hassle...no documentation...dont even have to be the original builder. > This is a good thing....make that a GREAT thing. For all those birds that > have no chance of making 103. > > You just need to decide if that FireFly will appeal in the resale market > to licensed sport pilots...or non-licensed Ultralite pilots. > > I am thinking it would be more appealing..therefore worth more...to > ultralite pilots. > I certainly dont know this for sure....I just think maybee!!!!!! > > IN fact...all legal 103 craft might just get a boost in the market > appeal... > maybeeee! > > -------- > Don G. > Central Illinois > Kitfox IV Speedster > Luscombe 8A > > http://www.geocities.com/dagger369th/my_firefly.htm > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=122436#122436 > > >


    Message 5


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    Time: 06:55:20 AM PST US
    Subject: Re: Federal Funding...now xpndr cert.
    From: "planecrazzzy" <planecrazzzy@yahoo.com>
    Update on Getting my Transponder & Alt encoder "Certified" I got the "sticker" for the Transponder...... But the Alt encoder wouldn't "light-up" their box..... I took the system out of the aircraft and brought it to D.C. Avionics He said it would probly take an "hour" ( $97 bucks an hour ) I guess I should have gotten it "bench tested" before I put it in the plane Oh well, it wasn't hard to take it out...same fer puttin it back in... Gotta Fly... Mike & "Jaz" in MN . . . -------- . . . . . Do Not Archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=122505#122505 Attachments: http://forums.matronics.com//files/jaz__mutt_muffs_003_178.jpg


    Message 6


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    Time: 07:00:22 AM PST US
    Subject: Re: Builders Plans
    From: "Rex Rodebush" <rrodebush@tema.net>
    I couldn't agree with you more. I ordered a Mark III but changed it to the "Xtra" when that design came out. I have the old plans and manual, the later manual and the latest plans. I also have found that the plans have gone downhill. The plans were redone but not improved, they have in fact gone the other way. They have many more mistakes and good tips that were in the previous plans and manuals have been left out. I have also talked the TNK guys about this and apparently it is out of their hands. It's a shame because the original plans and manual were in general very good in my opinion. The good thing is that the guys on the list are very helpful and you couldn't ask for better people to work with than Travis and Donnie at TNK. Rex Rodebush (42 years of mechanical design) Read this topic online here: http://forums.matronics.com/viewtopic.php?p=122506#122506


    Message 7


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    Time: 07:58:07 AM PST US
    Subject: Re: Federal Regulations, WAS Kolb Firefly
    From: "George Alexander" <gtalexander@att.net>
    Having followed and been significantly affected by, "Sport" issues, the most gifted presenter in the world would have a hard time convincing me that the real truth was anything other than the medical AND carrying a passenger. Issues like ".... public protection...." and "....rule making by exemption...." were positions that could be put out for public consumption, but not, IMO, sound arguments for the way it all came down. DL as a validation of the medical requirements to operate anything????????? For those of you who don't know...... I live in Florida! My 2 cents worth! (Which is about all that was left after I jumped through the hoops!) George Alexander Sport Pilot N709FS d-m-hague(at)comcast.net wrote: > At 10:57 PM 7/5/2007, R. Hankins wrote: > > > > I believe that Sport Pilot was more a response to EAA pressure to allow > > thousands of aging pilots to fly without a medical, than an effort at > > public protection... > > > > > > There was also pressure on FAA to end "rulemaking by exemption", which was > what the BFI program was. > > -Dana > > -- > -- > The only correct outcome to an armed robbery attempt is a dead armed robber. -------- George Alexander http://gtalexander.home.att.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=122508#122508


    Message 8


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    Time: 03:23:51 PM PST US
    Subject: E LSA vs E AB
    From: "davenagy" <dcnagy@gmail.com>
    A few years ago I bought an Un-registered Twinstar. To make it legal I got it inspected and N numbered as an Exp. Amatuer Built with the actual builder listed on the documents. Now with the Exp LSA option available, I wondering if there is any way to change the registration to Exp LSA so that I would be able to perform the annuals? Dave Nagy Read this topic online here: http://forums.matronics.com/viewtopic.php?p=122561#122561


    Message 9


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    Time: 04:42:46 PM PST US
    From: "Richard Girard" <jindoguy@gmail.com>
    Subject: Re: E LSA vs E AB
    Dave, The grandfathering rules in FAR 21.191 specifically states that the aircraft must not have been previously certificated. Rick On 7/6/07, davenagy <dcnagy@gmail.com> wrote: > > > A few years ago I bought an Un-registered Twinstar. To make it legal I got > it inspected and N numbered as an Exp. Amatuer Built with the actual builder > listed on the documents. Now with the Exp LSA option available, I wondering > if there is any way to change the registration to Exp LSA so that I would be > able to perform the annuals? > > Dave Nagy > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=122561#122561 > > -- Rick Girard "Ya'll drop on in" takes on a whole new meaning when you live at the airport.


    Message 10


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    Time: 05:33:15 PM PST US
    From: Arksey@aol.com
    Subject: fuel problem I think?
    Hello gang, Looking for information and advice. We have a firestar ll with a 503 rotax, dual ignition, dual carbs, pull start, no battery, Grandson experienced a engine problem which is described as engine rpm=99s dropped off , engi ne was not running rough nor sounded or felt rough when rpm dropped, engine rpms came right back up without engine stopping. He had been airborne about 5 minutes when this happened, He came back in and landed and the engine ran ok after the problem. We checked things over, pulled the carb bowls and things looked o k. He took off and flew about a hour with no engine problem. I later flew abou t a hour with no problem. A few days later I decided to take a little pitch o ut of prop to gain more rpm=99s on take off and after warming up engine and testing mags I took off to experience the same problem he had, but i was at about 300=99 , Rpm=99s dropped a lot to the point I thought it was go ing to quit. It did this about 3 times before I got in back on the runway. It acted to me l ike the engine was running out of fuel and then would get enough fuel to run ok . I checked everything out found nothing wrong and decided to take off again. Engine again had same problemJust like prior takeoff. This convince d me to put it in the hangar and fix the problem. The fuel system is described as follows. I have all nearly new gas lines, plastic, and recommended type, he avy type pulse line. Pulse pump was rebuilt about 40 hours ago, , gascolater sc reen is clean , fuel filter with about 20 hours. Primer bulb was new this spring and has bypass , also a primer in the system. Fuel comes out of the bottom of 2 5gal tanks. Tank filler caps are vented. We are fussy about our fuel and it goes thru a mr funnel when filling the tanks. Carbs rebuilt about 30 hours ago. I have found nothing wrong from inspection except the pulse pum p has no weep hole as recommended, also pulse line does not go below pump to form trap as recommended. So we are going to put on new pump with weep hole and correct the pulse line, new fuel filter and test fly it. I wonder about this also: the pulse pump is about 31=9D about the bottom of the tank s and the length of pulse line is 12=9D long. Pump specs call for maximum ris e of 39=9D.So we are close to the maximumI am considering a electric fuel pump r unning off the engine electrity, not battery and being plumbed in series, not parallel. I know that some recommend the electric pump be installed in para llel, but this is a lot more complicated and messy.and is it really necessar y?? Sorry for such a long post.but thanks for your thoughts and input will let you know what happens. Jim Swan firestar ll 503 michigan ************************************** See what's free at http://www.aol.com .


    Message 11


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    Time: 05:39:17 PM PST US
    Subject: Re: E LSA vs E AB
    From: "davenagy" <dcnagy@gmail.com>
    Thanks Rick! Now I know at least I didn't miss the chance! Dave Nagy Read this topic online here: http://forums.matronics.com/viewtopic.php?p=122579#122579


    Message 12


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    Time: 06:01:37 PM PST US
    Subject: Re: fuel problem I think?
    From: "planecrazzzy" <planecrazzzy@yahoo.com>
    It sounds like slight "Carb Ice" to me..... I had it happen with a 582.....a few years ago....Had to land Later my Dad told me that I should have tried to hit the Primer... Gotta Fly... Mike & "Jaz" in MN - FSII/503 -------- . . . . . Do Not Archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=122580#122580


    Message 13


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    Time: 06:07:57 PM PST US
    From: "Jim Kmet" <jlsk1@frontiernet.net>
    Subject: Re: fuel problem I think?
    Jim, ask yourself, What changed with the plane since your last uneventful flights, did you add fuel? if so, check the source/Quality. In other words, I think that your plan you mentioned in the post is the correct course of action.. Can you extend the fuel hose from the carb, , route the hose extension from there back to a fuel can on the ground under the plane & see if you can get the fuel to siphon back close to the ground? If so, it's probably not the fuel system/& or clogged filter. How about the jetting, ? small piece of dirt that gets released when RPMs/suction drop? & so on. Like I said, I think you`re on the right track already. Jim ----- Original Message ----- From: Arksey@aol.com To: kolb-list@matronics.com Sent: Friday, July 06, 2007 7:32 PM Subject: Kolb-List: fuel problem I think? Hello gang, Looking for information and advice. We have a firestar ll with a 503 rotax, dual ignition, dual carbs, pull start, no battery, Grandson experienced a engine problem which is described as engine rpm=99s dropped off , engine was not running rough nor sounded or felt rough when rpm dropped, engine rpms came right back up without engine stopping. He had been airborne about 5 minutes when this happened, He came back in and landed and the engine ran ok after the problem. We checked things over, pulled the carb bowls and things looked ok. He took off and flew about a hour with no engine problem. I later flew about a hour with no problem. A few days later I decided to take a little pitch out of prop to gain more rpm=99s on take off and after warming up engine and testing mags I took off to experience the same problem he had, but i was at about 300=99 , Rpm=99s dropped a lot to the point I thought it was going to quit. It did this about 3 times before I got in back on the runway. It acted to me like the engine was running out of fuel and then would get enough fuel to run ok. I checked everything out found nothing wrong and decided to take off again. Engine again had same problemJust like prior takeoff. This convinced me to put it in the hangar and fix the problem. The fuel system is described as follows. I have all nearly new gas lines, plastic, and recommended type, heavy type pulse line. Pulse pump was rebuilt about 40 hours ago, , gascolater screen is clean , fuel filter with about 20 hours. Primer bulb was new this spring and has bypass , also a primer in the system. Fuel comes out of the bottom of 2 5gal tanks. Tank filler caps are vented. We are fussy about our fuel and it goes thru a mr funnel when filling the tanks. Carbs rebuilt about 30 hours ago. I have found nothing wrong from inspection except the pulse pump has no weep hole as recommended, also pulse line does not go below pump to form trap as recommended. So we are going to put on new pump with weep hole and correct the pulse line, new fuel filter and test fly it. I wonder about this also: the pulse pump is about 31=9D about the bottom of the tanks and the length of pulse line is 12=9D long. Pump specs call for maximum rise of 39=9D.So we are close to the maximumI am considering a electric fuel pump running off the engine electrity, not battery and being plumbed in series, not parallel. I know that some recommend the electric pump be installed in parallel, but this is a lot more complicated and messy.and is it really necessary?? Sorry for such a long post.but thanks for your thoughts and inputwill let you know what happens. Jim Swan firestar ll 503 michigan ------------------------------------------------------------------------- ----- See what's free at AOL.com.


    Message 14


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    Time: 06:18:34 PM PST US
    From: "beauford T" <beauford173@verizon.net>
    Subject: Re: fuel problem I think?
    Jim: Whatever else you check, if it were mine, I'd sure be wanting to yank the exhaust manifold off and look at the pistons and rings for signs of scuffing and possible near-seizure... Had similar symptoms with my Nazi 447once... was carboned-up rings which caused it to almost seize. It bogged down, then recovered for a while and ran normally... I flew on home and cleaned the fuel system...Started it cold and it ran OK... on takeoff it bogged again... I looked into the exhaust ports and instantly saw the problem. I was lucky -- got off with new pistons and a carbuerator choke piston... Could have easily cost me my fanny. Just a thought....Worth what ye paid fer it... Beauford Firefly 076 / N173BW Brandon, FL ----- Original Message ----- From: Arksey@aol.com To: kolb-list@matronics.com Sent: Friday, July 06, 2007 8:32 PM Subject: Kolb-List: fuel problem I think? Hello gang, Looking for information and advice. We have a firestar ll with a 503 rotax, dual ignition, dual carbs, pull start, no battery, Grandson experienced a engine problem which is described as engine rpm=99s dropped off , engine was not running rough nor sounded or felt rough when rpm dropped, engine rpms came right back up without engine stopping. He had been airborne about 5 minutes when this happened, He came back in and landed and the engine ran ok after the problem. We checked things over, pulled the carb bowls and things looked ok. He took off and flew about a hour with no engine problem. I later flew about a hour with no problem. A few days later I decided to take a little pitch out of prop to gain more rpm=99s on take off and after warming up engine and testing mags I took off to experience the same problem he had, but i was at about 300=99 , Rpm=99s dropped a lot to the point I thought it was going to quit. It did this about 3 times before I got in back on the runway. It acted to me like the engine was running out of fuel and then would get enough fuel to run ok. I checked everything out found nothing wrong and decided to take off again. Engine again had same problemJust like prior takeoff. This convinced me to put it in the hangar and fix the problem. The fuel system is described as follows. I have all nearly new gas lines, plastic, and recommended type, heavy type pulse line. Pulse pump was rebuilt about 40 hours ago, , gascolater screen is clean , fuel filter with about 20 hours. Primer bulb was new this spring and has bypass , also a primer in the system. Fuel comes out of the bottom of 2 5gal tanks. Tank filler caps are vented. We are fussy about our fuel and it goes thru a mr funnel when filling the tanks. Carbs rebuilt about 30 hours ago. I have found nothing wrong from inspection except the pulse pump has no weep hole as recommended, also pulse line does not go below pump to form trap as recommended. So we are going to put on new pump with weep hole and correct the pulse line, new fuel filter and test fly it. I wonder about this also: the pulse pump is about 31=9D about the bottom of the tanks and the length of pulse line is 12=9D long. Pump specs call for maximum rise of 39=9D.So we are close to the maximumI am considering a electric fuel pump running off the engine electrity, not battery and being plumbed in series, not parallel. I know that some recommend the electric pump be installed in parallel, but this is a lot more complicated and messy.and is it really necessary?? Sorry for such a long post.but thanks for your thoughts and inputwill let you know what happens. Jim Swan firestar ll 503 michigan ------------------------------------------------------------------------- ----- See what's free at AOL.com.


    Message 15


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    Time: 07:05:07 PM PST US
    From: Arksey@aol.com
    Subject: Re: fuel problem I think?
    Hi mike, thanks for your suggestion of carb ice...but conditons were not conducive for carb ice at time......but yes it is possible....thanks Mike.... jim swan firestar ll michigan ************************************** See what's free at http://www.aol.com.


    Message 16


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    Time: 07:10:22 PM PST US
    From: Arksey@aol.com
    Subject: Re: fuel problem I think?
    Hi JIm, thanks...yur idea about siphon fuel back to a can is a good way to check resistance in fuel line....thanks.... jim swan firestar ll 503 michigan ************************************** See what's free at http://www.aol.com.


    Message 17


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    Time: 07:11:18 PM PST US
    From: "Jack B. Hart" <jbhart@onlyinternet.net>
    Subject: New FireFly Tail Wheel Spring System
    Kolbers, and FireFlyers, I really wanted to get away from the tension spring and to use a clevis spring. I could not find small light weight clevis springs. After several iterations, I have a new system that uses compression springs in a way that is equivalent to clevis springs. The new system can be seen at: http://www.thirdshift.com/jack/firefly/firefly133.html I believe the FireFly responds better to rudder pedal input than before, especially in grass. Shaved off 1.5 ounces. While I was at it I bushed the holes through which the hinge pin bolt passes. I hope you have a good 7/7/07. Jack B. Hart FF004 Winchester, IN


    Message 18


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    Time: 07:12:10 PM PST US
    From: Arksey@aol.com
    Subject: Re: fuel problem I think?
    Hi Beauford. thanks.... will check pistons...good thought.....jim swan firestar ll 503 michigan ************************************** See what's free at http://www.aol.com.


    Message 19


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    Time: 08:01:44 PM PST US
    From: ElleryWeld@aol.com
    Subject: Re: fuel problem I think?
    one other thing you might try is pulling the slides out of your carbs and raising the needle one notch, usually I do this in the spring of the year but I didnt this year and ended up doing it later to make my engine purr again as soon as it started running like that I knew what it was and landed at the next strip and made the proper adjustment Just another thought from Maine Ellery Do Not Archive ************************************** See what's free at http://www.aol.com.


    Message 20


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    Time: 08:18:40 PM PST US
    From: WhiskeyVictor36@aol.com
    Subject: Re: New FireFly Tail Wheel Spring System
    In a message dated 7/6/2007 10:12:00 P.M. Eastern Daylight Time, jbhart@onlyinternet.net writes: I hope you have a good 7/7/07 Jack, Make that 07/07/07 BV ************************************** See what's free at http://www.aol.com.


    Message 21


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    Time: 08:26:26 PM PST US
    From: WhiskeyVictor36@aol.com
    Subject: Re: fuel problem I think?
    In a message dated 7/6/2007 11:02:20 P.M. Eastern Daylight Time, ElleryWeld@aol.com writes: you might try is pulling the slides out of your carbs and raising the needle one notch, usually I do this in the spring of the year Ellery, Do you mean raise the needle, by lowering the clip in the groove? If so, that would allow more fuel mix (richer). I thought it was better to lean out for the summer because there's less air due to humidity. Bill Varnes Original Kolb FireStar Audubon NJ Do Not Archive ************************************** See what's free at http://www.aol.com.


    Message 22


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    Time: 09:05:16 PM PST US
    From: "Larry Cottrell" <lcottrell@fmtcblue.com>
    Subject: Re: fuel problem I think?
    Check the squeeze bulb. Larry C ----- Original Message ----- From: Arksey@aol.com To: kolb-list@matronics.com Sent: Friday, July 06, 2007 8:08 PM Subject: Re: Kolb-List: fuel problem I think? Hi JIm, thanks...yur idea about siphon fuel back to a can is a good way to check resistance in fuel line....thanks.... jim swan firestar ll 503 michigan ------------------------------------------------------------------------- ----- See what's free at AOL.com.


    Message 23


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    Time: 11:53:47 PM PST US
    From: "Tony Oldman" <aoldman@xtra.co.nz>
    Subject: Re: fuel problem I think?
    Have had similar problem , the problem was the air filter. Take the air filter off and see if RPMs come back to normal. If they do give the filter a good clean . The method I use is hot soapy water and then dry out .I find this needs done about every 25 to 30 hours to prevent occurrence If its fuel starvation that will not help but pulling the chock on when the problem occurs will or should momentarily rectify the problem and point you in the right direction. Tony ----- Original Message ----- From: Arksey@aol.com To: kolb-list@matronics.com Sent: Saturday, July 07, 2007 12:32 PM Subject: Kolb-List: fuel problem I think? Hello gang, Looking for information and advice. We have a firestar ll with a 503 rotax, dual ignition, dual carbs, pull start, no battery, Grandson experienced a engine problem which is described as engine rpm=99s dropped off , engine was not running rough nor sounded or felt rough when rpm dropped, engine rpms came right back up without engine stopping. He had been airborne about 5 minutes when this happened, He came back in and landed and the engine ran ok after the problem. We checked things over, pulled the carb bowls and things looked ok. He took off and flew about a hour with no engine problem. I later flew about a hour with no problem. A few days later I decided to take a little pitch out of prop to gain more rpm=99s on take off and after warming up engine and testing mags I took off to experience the same problem he had, but i was at about 300=99 , Rpm=99s dropped a lot to the point I thought it was going to quit. It did this about 3 times before I got in back on the runway. It acted to me like the engine was running out of fuel and then would get enough fuel to run ok. I checked everything out found nothing wrong and decided to take off again. Engine again had same problemJust like prior takeoff. This convinced me to put it in the hangar and fix the problem. The fuel system is described as follows. I have all nearly new gas lines, plastic, and recommended type, heavy type pulse line. Pulse pump was rebuilt about 40 hours ago, , gascolater screen is clean , fuel filter with about 20 hours. Primer bulb was new this spring and has bypass , also a primer in the system. Fuel comes out of the bottom of 2 5gal tanks. Tank filler caps are vented. We are fussy about our fuel and it goes thru a mr funnel when filling the tanks. Carbs rebuilt about 30 hours ago. I have found nothing wrong from inspection except the pulse pump has no weep hole as recommended, also pulse line does not go below pump to form trap as recommended. So we are going to put on new pump with weep hole and correct the pulse line, new fuel filter and test fly it. I wonder about this also: the pulse pump is about 31=9D about the bottom of the tanks and the length of pulse line is 12=9D long. Pump specs call for maximum rise of 39=9D.So we are close to the maximumI am considering a electric fuel pump running off the engine electrity, not battery and being plumbed in series, not parallel. I know that some recommend the electric pump be installed in parallel, but this is a lot more complicated and messy.and is it really necessary?? Sorry for such a long post.but thanks for your thoughts and inputwill let you know what happens. Jim Swan firestar ll 503 michigan ------------------------------------------------------------------------- ----- See what's free at AOL.com. ------------------------------------------------------------------------- ----- 6/07/2007 6:36 a.m.




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