View Single Post
Old 02-06-2018, 04:51 PM   #9 (permalink)
Master EcoModder
freebeard's Avatar
Join Date: Aug 2012
Location: northwest of normal
Posts: 19,644
Thanks: 5,507
Thanked 6,465 Times in 5,197 Posts
Just trying to help. People apply the template to everything. The thing is the back 70% depends on the airflow set up by the forward 30%. You can't just tack it onto the back of some arbitrary form. Mair starts with an extended body (fineness ratio is your friend) with a circular cross-section. There is (somewhere) some middle ground, hence the wind tunnel rules over theory.

I like the Tropfenwagen, it's shaped like a submarine conning tower. I tried combining several aero-forms into one:

This would need serious filleting and tweaking, but could accommodate specific internal space requirements.

You could lose all the [upper] taper and optimize the sides. Here's a study of putting a back window like the 1948 Studebaker Starlight coupe on a Beetle:

Conclussion: a realization that smacks you upside the head

  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
BamZipPow (02-06-2018)