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Need some help with a solution for wingstruts.

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Need some help with a solution for wingstruts.

Old 08-14-2022, 01:18 PM
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wdac's Avatar
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Default Need some help with a solution for wingstruts.


i have got my hands on a old but un-built Great Planes Ultimate Biplane ARF.

The issue is that the wing strutīs only have 2 out of 4 thumb screws left. 2 is gone, and i didn't notice that then i bought it dirt cheap.

i have been thinking of any solution to solve my issue, but i wanted to have a look here and see if someone else have a smart solution from experience and so on.
and ofc i need to ask, is the hardware on a Great Planes Ultimate in inches? i doubt any Great Planes is made with millimeter stuff?

Best Regards
Old 08-15-2022, 03:27 AM
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Take one of them to ACE hardware and go to the screw section There is usually a thread measurement device there for people in your situation.
Old 08-19-2022, 01:02 PM
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If you can post a picture of the thumbscrews that came with the kit. I know 4 posts might be an issue.

The other alternate is to replace the thumb screws with hex socket cap screws. Then use a ball end driver to aid with removing them with the driver shaft at an angle. And perhaps cut off the short arm of a ball end key and glue it into a short shaft to make a custom tool that fits between the wings to permit installing and removing the hex socket cap screws with lots of room to spare.

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