Quote:
Originally Posted by aerohead
Beef her up best you can.She's really going to try and explode with the air crashing down on her.
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Today I took aerohead's advice - not the first time I did that, I should point out - and installed four new stiffener bars, all 1" x 1/8" aluminum bar stock. Two of them are improved replacements for wood or too-short-metal ones I had installed earlier, the other two are new to the scheme.
This seems to have fixed the vibrations and flexing. Hopefully tomorrow I'll get to do a real road trip, about 150 miles in all, on the interstate.
I want to debug the finned design as much as possible before giving up on it. Stiffening was the first step. I think tapering it in horizontally will be next; it barely narrows at all from front to rear right now.
If stiffening and tapering don't give good results then I can cut the fins off - but once they're gone, they're gone. I need to fix the flaws in execution before I give up on the design.