[aerohead]

Originally Posted by tacotuesday

A spoiler that could collapse completely would be very cool!

To do that I would keep the spoiler only mildly curved to match the profile of the cab. And use a stepper motor to turn an axle that had the spoiler mounted on it. Unlike an actuator that would physically lift the spoiler on hinges, the stepper motor would spin the spoiler like a rotisserie chicken, allowing me to fully collapse it when needed.

I like it!

I'm still unsure how I would like to construct the spoiler itself.
If I use sheet metal, I can match the curve of the cab, but it will remain flat, it will block the brake light and it will be quite heavy.

If I use plastic, I can opt for some clear plastic, and it will match the curve of the cab, but it will remain flat, and be rather expensive.

If I use fiberglass, I'm going to have to learn how to use fiberglass. I've only helped with a fiberglass job once. Plus, it leaves you itchy for days if it gets around your protective equipment.

Im also unsure if a flat spoiler or one with a gentle curve down like this would be better:


Any ideas?

A simple,stepped, 'flat' wing incorporated into a sail panel extension has worked well,and is below the 3rd brake light.