[kach22i]

Thumbnail link:
https://www.freeenergyplanet.biz/micro-hydro/rotor.html

Images of other 7's..............
Locost Aerodynamics... or lack thereof
https://www.pinterest.co.uk/pin/454159943671508608/

These look interesting as far as minimalism.
https://www.flowbelow.com/

https://www.nhra.com/news/2012/smarty-pants



https://www.slotforum.com/threads/19...limousin.9036/



https://www.reddit.com/r/formula1/co...hich_raced_in/


A wheel spat fairing all the way around like on aircraft is best, followed by front/top/back (open sides as on Sylph - see below), followed by front/back, followed by back only, followed by front only.