Featherdrop - An Over-Engineered Teardrop

Member designs created in Sketchup or other cad program

Re: Featherdrop - An Over-Engineered Teardrop

Postby timm » Wed Jan 02, 2019 4:46 pm

I wasn't planning on using PVC as the supply lines, I was thinking pneumatic tubing would handle the vibrations and stresses of being on a trailer. The PVC would only be used as the cylinders, which should lift the roof with only about 30 PSI. I can also enclose the cylinders with plywood pretty easily if I need to run more pressure in the cylinders.

I'm thinking the air supply would be a small 12v compressor running off the car battery in the trailer. I'm not too concerned with the extension time as the pressure is pretty low and the volume being pressurized is relatively small. I can build a fifth cylinder and bring it along in case one fails.

If I can't get the roof to extend properly I might have to add a threaded rod system to help everything extend together or completely switch over to threaded rods. I think that potential risk is worth the simplicity of the pneumatic system.

I won't be using actual aircraft dope, I'll be using regular exterior paint so the foam should be fine.
timm
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Re: Featherdrop - An Over-Engineered Teardrop

Postby fpena1962 » Sun Sep 20, 2020 12:23 pm

Very cool design and some nice cad work too.
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Re: Featherdrop - An Over-Engineered Teardrop

Postby wysedav » Mon Sep 21, 2020 5:51 pm

google SOF kayaks. They are made with Nylon fabric on a rib and spar type of frame. the Nylon is adhered/waterproofed with a flexible epoxy. It's super strong and lightweight.

David
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