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Kitfox 1 Rebuild S/N 141

12 posts in this topic

Posted (edited)

20180102_134701_25588486038_o.thumb.jpg.

Well today was my first day back to A&P school from the holiday break and I got right to working on my KF1 project. History on it is the previous owner upon landing on his driveway, veered off into the ditch and took out the left main gear. The wingtip hit the ground as well as the prop. The plane sat for about 10 years and then the owner passed away. I bought it from the estate with little to no information or logbooks. Here's the main squawks I have;

  • New left main gear supplied by the family is the wrong size, about 2 inches shorter on the front and aft main tubes. Are there different stock gear from the 1 to 2 and so on?
  • Bent tubing on LH fuselage side20180102_161119_39460880671_o.thumb.jpg.20180102_143511_38580558235_o.thumb.jpg.
  • Collapsed RH Seat truss, will need to be rebuilt20180102_155334_24593999127_o.thumb.jpg.
  • Dial prop flange and complete Rotax 582 overhaul
  • All SB's and SL's need to be complied with. i.e. elevator and rudder pedal gussets and the "Jesus" elevator pushrod bolt
  • Multiple rips and tears in the fabric
  • Needs a new prop
  • Complete condition inspection

Needless to say there's a lot to do but I'm just excited to finally start work on it. Today I removed the interior and seat pans to get a better picture of the bent tubing of the fuselage. I'll be using AC 43.13 as my repair reference but any advice will be more than welcome.

Also the previous owner had a replacement LH main gear built supposedly by Kitfox but it's definitely smaller than the original RH main gear.20180102_160906_27683266409_o.thumb.jpg.

Did the model 2 or 3 have taller gear, is there any difference. If someone has a model 1 would they mind taking some measurements for me to reference?

Anyways any help is appreciated and I'll be updating the thread as I make progress or have questions.

Happy New Year everyone!

Edited by Brodstol

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Posted

Would be happy to take measurements for you, but I won't be home for a while.  I didn't think Kitfox made different length gear legs in the different models.  The Avid MK IV was a couple of inches taller than their earlier gear, but it doesn't look like you have one of those on the right side.  They had a built in step on them.  Maybe someone homemade one of yours???  Can you get a picture of the difference if any  in the gear legs where the bungees wrap around them?  Not uncommon to see bent seat trusses in these planes.  A weak spot on the Avid Flyers as well.  I've infilled the triangles in the seat truss as much as possible with .040" steel plate to stiffen it up.   JImChuk

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Posted (edited)

Photo can be deceiving, but I wonder about fore and aft location of your axles - If that taller gear puts the axle farther forward, then it could be an Avid gear or one that someone built, which is good.  I would guess the smaller gear is original Kitfox 1 size.  I have a set in the hanger but cant get there to measure until next weekend.  If I had to make one side, then I would copy the taller wider heavier gear.  EDMO

Edited by EDMO

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Posted

I have a stock kitfox 1 gear legs Ill be happy to measure them tonight after work.

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Posted

Thanks guys that'll definitely help solve the mystery. I'll check on the axle placement and I agree the taller, wider gear would be preferred. 

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Posted (edited)

My gear legs are 22 inches from the upper mounting bolt C/L to the axle C/l. Model 1 S/N 107. Mike

Edited by ppilotmike

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Posted

My gear legs are 22 inches from the upper mounting bolt C/L to the axle C/l. Model S/N 107. Mike

Perfect! Thanks a lot ppilotmike! I just measured and the original RH landing gear is the same measurement whereas the "new" LH gear is 2" shorter at 20". I'm starting to doubt that the gear came from Kitfox but rather someone else who didn't fabricate appropriately. I'll start posting in the wanted ads for a LH main gear and hope to find one from the many people who've upgraded gear over the years.

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Posted

The early ones must have been shorter I have some from serial number 11 that measure bout 20.5" They must have made the change somewhere

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Posted

Huh that's interesting, might explain the mix up. I made more progress of the plane today. I took the 582 off and started the tear down. I dialed and dye penetrated the propeller flange of my "C" gearbox and all looks good. Next I need to get a puller for the stator and the crank flywheel. I'm thinking maybe a steering wheel puller will work. Here's a few pics of the progress.

IMG_6894.thumb.JPG.7d9b03222ef47d39dbaf0IMG_6892.thumb.JPG.4167d68f9508c3ad7fbc020180103_161220_39452390302_o.thumb.jpg.

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Posted

If you take a piece of maybe 1/4" thick steel plate, and drill 3 holes in it to match the ones on the front flywheel, you should be able to pull that one off pretty easy.  That's what I've done.  Put a nut or socket under the plate, and against the crankshaft end and evenly tighten the bolts.  Unless you are able to check to make sure the crank isn't twisted after the prop strike, I would leave the rest of the engine together and send it to someone who can do that for you.  They could inspect it and reseal it at the same time.  JImChuk

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Posted

The way that shop looks I bet you could just build a new one that matches. It would be a good Lesson on welding.

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Posted

If you take a piece of maybe 1/4" thick steel plate, and drill 3 holes in it to match the ones on the front flywheel, you should be able to pull that one off pretty easy.  That's what I've done.  Put a nut or socket under the plate, and against the crankshaft end and evenly tighten the bolts.  Unless you are able to check to make sure the crank isn't twisted after the prop strike, I would leave the rest of the engine together and send it to someone who can do that for you.  They could inspect it and reseal it at the same time.  JImChuk

I did same with a scrap piece of plywood, worked fine.

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