THANK you all for such positive and fast help. The plane will NEVER invert. Maybe during a crash ?

I am doing the prep work on my first 6 engined plane. Have completed 4 engine jobs.
Either a Blohm-Voss BV-238..... or the Tupolev ANT-20 Maximum Gorki.

1 engine with a single double sided timing belt to power all the props at a slow high pitch speed.

Have done this setup on small stuff.

Will pick 1 up used at a mower shop.

Thank you, thank you, very much. WAAHHHOOOO!!

Rich