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SAT18
 Post subject: 3 Tube main landing gear
PostPosted: Fri May 17, 2019 5:45 am 
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Hi,

On my current project that I purchased, I noticed the landing gear differs to the original plans. It is made of 3 tubes on the gear legs (1"x0.188, 1.25"x0.120" and 1.5"x0.120") All other dimensions are per dwg-515 (Long landing gear.)

The 1" tube runs the full length of the main gear from top attach point to axle mount, with the 1.25" tubing fitting over this and it being about 2" short on both the top and bottom. It is welded to the 1" tube. The 1.5" tube is as per Dwg 515. Heat treating done as per the plans.

This landing gear has not flow yet, it was locally manufactured to replace a damaged LG. Has anyone seen this kind of design on a T18 A-frame? Trying to determine if it is worth using.

Dan.


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James Grahn
PostPosted: Fri May 17, 2019 9:25 am 
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Not in my 21 years of flying these have I seen that type of gear.
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leewwalton
PostPosted: Sat May 18, 2019 10:55 am 
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Looks way overbuilt to me .. gear is heavy enough as is. That one looks 50% heavier!

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James Grahn
PostPosted: Mon May 20, 2019 7:01 pm 
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If you use that gear, I recommend that you frequently inspect the 1” tube area by the axles. That cannot be as strong as 1.25 by .313 wall.
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fytrplt
PostPosted: Mon May 20, 2019 7:21 pm 
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it is also welded down there where it needs to flex.

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dickwolff
PostPosted: Wed May 22, 2019 7:21 am 
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Dan...

The plans-designed gear is already plenty stiff. What you have there is going to be worse. You really don’t want that.

D


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