Doug in Japan::
Hope all is well

I notice Rotrex has a new small compressor that apparently spins our
direction up to 240Krpm. I hav'nt seen enough postings here regarding
traction drive compounding so I am not sure of some of the critical
details like the relative size of the turbo conjoined to size 'X' Rotrex

I did some business with a local turbo rebuilder recently who talked
about left hand and right hand turbin scrolls. I hav'nt looked yet; my
guess is, there will likely be something that could be retrofitted to
the inlet side of a Rotrex.

I am considering modifying an Aerocharger for this purpose; if,
Aerocharger does not make a right hand turbin scroll setup.

Ed Carver

There is a bunch of stuff
at http://www.rotaryeng.net/turbo-compound.html

Also here are some pictures of the rotrex.


Paul Lamar


Ed,

The designer of the Rotrex traction drive told me it would work in either direction, however the oil pump ports,  the drive shaft thread, and drive plate thread need to be reverse to turn CCW.  I haven't played with the little one you mentioned  but I think it is for motorcycles.  The 13:1 ratio  30's series can handle up to about 30 hps.  The 7:1 ratio 35's series up to 70hp.    Turbo compound devices  increases the torque to the shaft and the final drive pulley can get large or the traction drive outlet very small.  Matching a turbine to the traction drive is no easy trick.  The best way may be to have an axial turbine constructed by some of the small jet engine hobbyists.  Jet Beetle comes to mind.

Concept viability can be tested using a radial turbine however.
Doug in Japan