[ENERGYprof]

I am building a removable boattail for my Prius.

After some discussion about a removable molded kammback, I have been persuaded by ecomodder users to go for a full boattail instead, and thus the new thread.

1) The departure angle is as low as my driveway will tolerate.
2) The design uses aluminum for a frame, with a 1/4" wall 2" square pipe coming out of the hitch-receptacle, and 1/8" wall 1" square pipe for bracing. Thin-wall aluminum is being used where possible. The pieces are being bolted together, and will later be welded in place for extra strength. The 1/4" wall pipe was welded at an upwards angle, and should serve some safety purpose.
3) To support the coroplast, foam spars are being used, like inside an ultralight airplane, which are glued in place with polyurethane expanding foam.
4) The coroplast will be laid over the spars. Excess foam can be easily shaved down with a wood file for last minute changes.
5) The hatch can still open and be useable.
6) The entire assembly should be quickly removable for a maximum W.A.F. rating*.


I am constructing this in my garage to avoid neighborhood gawking, which hasn't seemed to help. Neighbors have already walked over to get a better look.

After I am done, performance springs will be added for a lower and stiffer ride, and a front air dam may do a better job than my current grille-block.

Any advice will be appreciated!!!!!




*Wife Acceptance Factor