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Best way to mount retracts in foam wings-giant scale?

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Best way to mount retracts in foam wings-giant scale?

Old 06-12-2011, 04:19 PM
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Default Best way to mount retracts in foam wings-giant scale?

Hello, I'm thinking of doing a scratch build of a 40% sized scale aircraft that would use retracts. I found a supplier for the gear, but I'm perplexed on how to mount giant scale retracts in foam wings. For a 40 pound airplane I'd need a solid structure. I've done gear in foam wings for .60 sized planes.

Could some of you giant scale builders please share how you have mounted retracts on giant scale planes with foam wing cores?
Old 06-12-2011, 05:11 PM
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Default RE: Best way to mount retracts in foam wings-giant scale?

Dave, Here's what I do for a 50cc sized model. They have survived some very hard landings and have been torn out on those controlled crashes. On several occasions, the 1/2 inch struts have been severely bent with no damage to the structure. By the way, this subject has been covered in the past on RCU threads. Do a search and see what shows up. Show us what you decide to do and how it works out. Dan.
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Old 06-13-2011, 02:49 AM
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Default RE: Best way to mount retracts in foam wings-giant scale?

When I built my jet the dihedral braces (1 is 1/4 ply, the other 1/8) go from retract to retract tieing the whole lot together.

The braces are spaced about 4 inches apart & the wheels actually retract between the braces which form the wheel wells & also contain the flap servos. - John.
Old 06-13-2011, 05:05 PM
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Default RE: Best way to mount retracts in foam wings-giant scale?


ORIGINAL: DAN REISS

Dave, Here's what I do for a 50cc sized model. They have survived some very hard landings and have been torn out on those controlled crashes. On several occasions, the 1/2 inch struts have been severely bent with no damage to the structure. By the way, this subject has been covered in the past on RCU threads. Do a search and see what shows up. Show us what you decide to do and how it works out. Dan.
Are those Spring-Air's? I didn't know they made them that big.
Old 06-13-2011, 06:12 PM
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Default RE: Best way to mount retracts in foam wings-giant scale?

Dave, Yes they are Spring Air 404 with Robart 1/2 inch struts. They're good up to 25 pound models. I have several sets in my 50cc models. Dan.
Old 06-14-2011, 05:29 AM
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Default RE: Best way to mount retracts in foam wings-giant scale?

For a 40% plane, I would use the same method as above, only changing the end plates on the box that he built to ribs that went from the leading edge to the main spar/dihedral brace.

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