A two rotor engine has less shaft slope and whirl than a single for a two
reasons: first, the thick section "gooseneck" between the eccentrics provides
stiffness; second, the counterweights on a twin are lighter, so there is less
bending moment and consequently less shaft slope towards the free ends of the
crank.

Jon Lauter
Rotary Power Marine Corporation

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org