Aero-engined cars. 2:15 video:
https://www.youtube.com/watch?v=aTyDKl-IYVg
Previously:
https://www.homemadetools.net/forum/...529#post142982
https://www.homemadetools.net/forum/...157#post141505
https://www.homemadetools.net/forum/...876#post140447
https://www.homemadetools.net/forum/...760#post140065
https://www.homemadetools.net/forum/...326#post131160
https://www.homemadetools.net/forum/...513#post104455