Here is a slight variation. The plenum and snorkel are fixed
     and the U tubes move in and out. A 3 inch movement of the U tubes
     is an over all change in length of six inches. About 15 or 16 inches to
     21 or 22 inches overall. A little more thought needs to be given
     on how the force is applied to the U tubes to prevent them from
     cocking in the bores.

     I think Bill Jepson came up with this idea a year or so ago (May 2003) but we never
     developed it to this stage. Bill called it the Trombone intake as I recall.
     Are you planing to build one Bill? Here is Bill's 3D as well.

     When we get further info on the RV10 I will do a layout for the three rotor
     p-port version. It is a bit much to ask to have six tubes slide in and out
     rather than only three.

     This could be applicable to a 3 rotor street car as it is almost impossible
     to do a dynamic chamber 3 rotor engine. I think that was a factor in the demise
     of the 3 rotor Cosmo affecting both low speed torque and BSFC.

     Paul Lamar

Paul, I have been considering PP on the 20B due to the much simpler
plumbing. I agree that the Trombone slide would be almost impossible on the
6 runner intake. 3 tubes would be much simpler. The interesting part for the 20B
was Francois comments on best BSFC. Injecting full charge unto the large side
port. The ports on the 20B are set up for this from the factory, I'm not sure
which set are the primary injectors. There is a set of the two per rotor shooting
directly into the larger ports. The 20B is a 6 port (like a 13B 4 port engine).
I plan a full engine check out, (disassembly) prior to running.
Bill Jepson

 
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