Just a thought, and I don?t know why. But with the renisis side
 porting, or peripheral porting. It wouldn?t be very hard at all
 to make a  rotary engine run the opposite direction if a person
 needed it to. I wonder why I care?

 Bob M.

 You are probably thinking of a twin.

 It will run backwards but the internal cooling would be all screwed
 up :)

 Paul Lamar


 It would work perfectly in a parallel universe.
 jd

 Paul,
 With a few of us working on billet machined side housings (with steel
 inserts), the  cooling pattern and bolt patterns could be mirrored and
 the
 rotor housings mounted rotated 180. This would give a reverse rotation
 rotary that had identical performance, both hp and cooling. Other
 stuff like
 the oil and water pumps would have to be reworked for rotation, but
very
 doable.
 This would provide a great twin set up.
 Larry

 We might even sell one :)

 Then we will have to deal with the law of unintended consequences.

 I think we are twenty or thirty years ahead of our time here.
 Perhaps when I have my 100th birthday party.

 First we must get 100,000 rotaries flying :)


 Paul Lamar

Why wouldn't it be easier to beef up the e-shaft and use the other end
of the engine  for power output?

Victor

Much cheaper and more likely to work.
The required modifications are extensive but not nearly as bad as
running
the engine in the other direction. A new front cover would
need to be designed and built as well.


Paul Lamar




Larry,To get the front and back side housings all we have to do is
mirror the solids in the database. This would take less than a minute in
Rhino4. To avoid needing a new front accessory cover the attach bosses
and flange of the standard rotation would be unioned onto the mirrored
housing., probably a 45 minute job. The waterpump is available for a
serpentinr belt  drive which  turns the opposite direction and being a
stock part should be available on e-bay. An external dry sump as used on
cup cars is around $1100 from several manufacturers and could be run off
the stock oil pan.Oil would enter the rear housing at the filter boss.

I think it may be possible to install the E-shaft backwards in
the engine since the part between the stationary gear bores appears
symetrical and build a thrust bearing cap for the other end. Finding a
way to attach a PSRU to the front side housing
looks  to be nearly impossible. There is someone on the newsletter who
has built a new front accessory cover with a dynafocal engine mount for
a 13B which may allow the PSRU to be adapted and contail the prop
torque. The engine would still be hanging from the available fastener
locations which are really small diameter and dont have much material
around them to make them bigger.

 As far as the PSRU is concerned you would need to talk to Tracy
about  the direction of the thrust bearing load turning the psru in
reverse because it has helical cut gears in the planetary.

 If I was to buils counterrotating props I would use stock Mazda
engines and build the PSRUsThey would be spur gear, one with three
gears and one with two idler gears(four gears) and constant speed
provisions. This would be single tooth contact but the change gears are
reliable in a quick change  at six times the HP load we can subject them
too and fairly inexpensive. The end of the input shaft and the idler
gears allow many options to mount a prop pump, cooling pump and governor
for the constant speed prop. This would also raise the thrust line or
more correctly lower the engine and make the stock tuned intake system
useable.

I dont know if this post is really on target for the forum.
Possibly more like hangar flying than installing a rotary in an aircraft
so if it is not appropriate Paul doesn't have to post itIn a way it
is like my bosses business phone always interrupting, but like I told
him it  is better than if it never rings.

george grimes

This one is better than some :)
You are right. I like to solve installation problems
and making what we have easier and faster to install. All this stuff
is pretty far out. Richard Sohn has been working away on
a light weight one rotor for at least 8 years. It has
yet to fly.

Paul Lamar