I am thinking about building a Reno Racer.
We need about 800 to 1000 HP to blow the rest
of those guys into the weeds :-)

First hurdle is coming up with a gear box.
I can't afford $35.000 for a bell final drive
so I investigated the Allison 1000 truck transmission.

Rumour had it it was 4:1 but that is not the case for
a single planetary set. P3 on the Allison is 3:1 when
you hold the ring gear fixed, take power out of the
planet carrier and put power into the sun gear.
The output will rotate in the same direction as the
engine.

You get the ratio by dividing the ring gear diameter
by the sun gear diameter and adding one.

Here is a picture compared to the Ford unit we are
using now for most rotary powered air planes.

Looks good for a 1000 HP 3 rotor engine.

A lot of the stuff attached to the ring gear will be
machined away.

Paul Lamar

The Rotary Engine free News Letter. Powered by Linux.
If you want off the list PLEASE let me know and I will
remove  you.  ACRE NL web site. http://www.rotaryeng.net
You Tube http://tinyurl.com/beqqxas
Copyright 1998-2016 All world wide rights reserved.