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leinad
Joined: 19 Sep 2006
Posts: 283
Location: Central Virginia
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 Posted: Tue Oct 31, 2006 4:59 pm Post subject: composite landing gear installation |
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I recently received my composite landing gear for my XL and it's going to require some modifications to install it. Has anyone else gone this route? I have some ideas about how to do it, but was wondering what others have done.
Dan Dempsey (601XL/Corvair)
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Scratch building XL with Corvair Engine |
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david_a_g_johnson(at)btin
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| Posted: Wed Nov 01, 2006 2:23 am Post subject: composite landing gear installation |
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I am building an XL with composite gera from a (CZAW - UK) kit. I'm not sure
what parts are different, but the main difference seems to be a pair of
steel 'boxes' that the ends of the gear legs slide into with a pair of
vertical bolts that go through the boxes and the legs. There are a pair of
0.040" thick sections that run fore and aft and form the bottom of the
control tunnel sidewalls.
Sorry if I am not explaining it very well, but if you contact me off-list I
can give you dimensions, etc.
Dave Johnson
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paulrod36(at)msn.com
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| Posted: Wed Nov 01, 2006 10:02 am Post subject: composite landing gear installation |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Dan, I assume you're referring to the Czech gear. If not, read no further. When I got the Czech gear, Pat Lorie was kind enough to send me photos of what his looked like. But since mine is a taildragger, I had to do things differently. I wasn't comfortable with the Czech method of mounting, so I modified their gear attach somewhat. I welded two pieces of 3/4 square 4130 steel tubing to the inside of the attach fixture, which I ran up the inside of the skin, to the top longeron. These were eventually rivetted to the skin, and to a gusset plate at the longeron. I then fabricated two 4130 plates, about .060, 9 by 12, with a 1/4 inch flange on either side for strength, that lay on the floorboard and peeked up just outside the edges of the (in my case) heel support channel, where the gear goes if you're a taildragger. I drilled those plates to coincide with the rivets that hold the channel. (I think they were A-5's. at 60 pitch.) I then drilled through the legs, steel plates, and top of the channel for the two mounting bolts, with large washers to spread the load on the legs. Last thing I did was enlarge the holes in the top of the channel, to allow for a socket to reach the bolt heads. I didn't take pictures, and wouldn't know how to include them if I did, but I think you get the idea. If you sectioned the setup, you would see, from top to bottom, the channel, the 9 by 12 plate, the floor skin, the Czech attach mount, the composite leg, the large washer, and the nut. I have yet to do a drop test on this, until I get the engine hung, but I think that the plates will spread the load adequately. I thought about, but rejected due to weight considerations, making the steel plate run from side to side. Might yet have to go that way if it fails the drop tests. Anyway, I hope this will help.
Paul Rodriguez
601XL/Corvair
stiiiiiiiilllll on the canopy
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