Subject: Reverse rotation rotary?
From: ACRE NL
Date: 2/3/2002, 7:06 PM


Paul - A somewhat frivolous question, prompted by the PSRU
question.
WitH the planetary reversing rotation, has anyone considered
reversing the
rotation of a Wankel engine to broaden the propeller selection
base?.
This is a common gambit with V8s and single stage gear reductions.
Vance

Vance, I AM surprised. I thought I had you thoroughly trained on the
intricacies of
the Wankel engine. You must realize by now, unlike a silly two cycle
piston
engine,
IT WILL NOT RUN BACKWARDS gracefully !!!! :-)

Is there enough attitudes in that paragraph for you? :-)

Not to worry folks. Vance and I are local good friends.

Not unless the exhaust port becomes the intake port and vice versa.
Then the
port
timing would be way off as would the cooling of the rotor housing.

Since you are making up all sorts of manifolds, reversing intake to
exhaust
is no big
deal.
Similar to any other 4 stroke engine there is significant overlap and
a high
degree of
symmetry in the effective valve timing, such that a minor amount of
porting
would take
care of any miss timing. The heat issue could be a sinker tho. Just
thought I
would
wake up the troops, and get the creative juices flowing - Vance :-)


You might be able to flip the rotor housings, but then they wouldn't
match
up to the end housings...


 There are a lot of problems doing it and I don't want to
waste time going over them again. If anybody really wants to discuss this
again get the
CD first as there are several engine heat distribution diagrams on the CD.

Paul Lamar

But imagine a twin engine (contra rotating) using 20B's....
Mmmmm....   Pond Racer.....

Martin Morgan
Pitts S-1S

If you use a belt or chain drive you can turn one engine around as in
this drawing. Forget running one backwards. The cooling would be all wrong.

Paul Lamar
 
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