Thorp Air Command -

Centre wing spar cap
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Author:  rrobut [ Wed Jul 15, 2020 5:36 am ]
Post subject:  Centre wing spar cap

On the S 18, Drawing number 227 states that 1 cap 2x2x0.25 2014 T6 channel is required.
The drawing seems to show that it is 1.25x2x1.35x0.25.
Alcoa Die 892

I am a little confused as to the actual size that is to be ordered.

Author:  James Grahn [ Wed Jul 15, 2020 1:04 pm ]
Post subject:  Re: Centre wing spar cap

It is a machined piece. That’s why you see different dimensions.

Author:  rrobut [ Fri Jul 17, 2020 6:45 am ]
Post subject:  Re: Centre wing spar cap

Thanks Cubes for the prompt reply.
So it starts as a 2x2x2x.25 channel and both legs are machined to about 1.25. The outer one at the fitting end tapered.
Both machined full length to the reduced dimension

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