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  #1  
Old 03-23-2014, 12:59 PM
dspender dspender is offline
 
Join Date: May 2009
Location: Bay City, MI
Posts: 421
Default Landing gear mount

Please provide me some clues how to get the main landing gear mount into place. I have just about had it
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  #2  
Old 03-23-2014, 01:13 PM
Fracrat Fracrat is offline
 
Join Date: Apr 2012
Location: Loganville ga
Posts: 97
Default Landing gear

I had a rough time also. Used nail punches to help line it up. Seemed the welds where out of plane. After many expletives was finally able to get them in.
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  #3  
Old 03-23-2014, 02:12 PM
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rleffler rleffler is offline
 
Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 4,196
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Dennis,

Photos or a better description of your issues would help us help you better.

bob
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  #4  
Old 03-23-2014, 05:05 PM
dspender dspender is offline
 
Join Date: May 2009
Location: Bay City, MI
Posts: 421
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It looks like the landing gear mount is intended to rest flush against the forward aspect of the Fwd center section bulkhead assembly. On the left it nearly does so. On the right it rests flush on the upper aspect of the fwd center section bulkhead, but on the lower aspect of the fwd center section bulkhead it rests about 3/16 away from flush. The forward brace of the landing gear mount is intended to rest on the fwd cabin floor and fasten through it into the underlying fwd fuselage floor rib. If the forward brace were angled a degree or two upward, I believe it would allow the landing gear mount to rest flush with the forward aspect of the fwd center section bulkhead. I am suspicious the forward brace may not have been welded onto the landing gear mount at quite the correct angle, placing the landing gear mount slightly away from the forward aspect of the fwd center section bulkhead. However I freely admit I may have overlooked an error on my part also. I am looking for any suggestions others have entertained when faced with what I suspect is not an uncommon event during construction.
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  #5  
Old 03-24-2014, 12:45 PM
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tnelson tnelson is offline
 
Join Date: Dec 2005
Location: Boynton Beach, FL
Posts: 59
Default Main gear binding

I found the same issue. Neither would pull up flush to the spar. I noticed the weldment was binding where the gear tube exited the the hole in the bottom skins. I marked where the skin touched, removed the weldment then ran the dremel with a scotchbrite wheel around the hole until skin was not touching the mount. When I replaced the mount they went in flush against the spar.
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  #6  
Old 03-24-2014, 02:12 PM
jwilbur jwilbur is offline
 
Join Date: Dec 2010
Location: Culpeper, VA
Posts: 693
Default Make a guide pin

I had a ton-o-trouble doing this. In the end I made a guide-pin out of an AN bolt and that did the trick. In short, I took an AN3 bolt and put it in the chuck of my drill press (a poor man's lathe). Then I held a file against the end of the bolt to taper the end. Then I rounded the tip with a wheel.

I put the gear mount in place with one bolt (a little loose), then in another spot used the homemade guide pin to align the rest of the holes. I put a bunch more bolts in place. Finally, I removed the guide pin and put in its place an unmodified bolt.

I'm not at the end of section 29 yet, but when I get there I'll be using this method again to permanently install the gear mounts.

Here's a link to my build log.
http://airplane.athomeinthewilburnes...-bottom-skins/

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  #7  
Old 03-24-2014, 07:03 PM
dspender dspender is offline
 
Join Date: May 2009
Location: Bay City, MI
Posts: 421
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Thank you. I studied your web site. My concern is a small part of the gear mount won't touch the spar. I was told somewhat rudely and condescending from ... at Van's to use hardware bolts to see if the mount won't draw up to the spar. Then remove and attach with the designated bolts. I will soon try that. My concern is I want to have the mount rest on all points next to the spar. THis is the first bugger I have encountered.
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  #8  
Old 03-24-2014, 08:34 PM
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digidocs digidocs is offline
 
Join Date: Apr 2007
Location: -
Posts: 502
Default Me, too.

I had similar problems with the gear mounts. One of mine was pretty warped and I had to remove a fair amount of material from the bottom skin to get it to fit. Even afterwards it was not fun.

Hang in there, it will go eventually.

David
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  #9  
Old 03-24-2014, 11:49 PM
dhmoose dhmoose is offline
 
Join Date: Jun 2010
Location: Portland, OR
Posts: 337
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Quote:
Originally Posted by jwilbur View Post
I had a ton-o-trouble doing this. In the end I made a guide-pin out of an AN bolt and that did the trick. In short, I took an AN3 bolt and put it in the chuck of my drill press (a poor man's lathe). Then I held a file against the end of the bolt to taper the end. Then I rounded the tip with a wheel.

I put the gear mount in place with one bolt (a little loose), then in another spot used the homemade guide pin to align the rest of the holes. I put a bunch more bolts in place. Finally, I removed the guide pin and put in its place an unmodified bolt.

I'm not at the end of section 29 yet, but when I get there I'll be using this method again to permanently install the gear mounts.

Here's a link to my build log.
http://airplane.athomeinthewilburnes...-bottom-skins/

Just an added tip: you can cut the bolt head off completely (making a "drift pin") and then pass several of these into the hole to align the weldment. Once aligned, take a new bolt and use it to push the drift pins THROUGH the hole. New bolt in, drift pin out. That's much easier then trying to pull the modified bolt out again.
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  #10  
Old 03-25-2014, 05:40 AM
dspender dspender is offline
 
Join Date: May 2009
Location: Bay City, MI
Posts: 421
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That makes good sense
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