How many would be interested in a low cost Teflon slide throttle kit?
 The side plates can be NC punched out relatively cheaply much like an RV
 airplane is pre punched. You can make the Teflon part on a drill press and
 hole saw.

 Paul Lamar



 Definitely count me in for one of those. Will it all fit in a $5 box? ;-)
 C. Smith

 Don't know what it will cost as it won't fit a flat rate box.
 I'll need to weigh it. My guess is metal part will be less than
 2 pounds. It is also about 15 inches long.


 Paul Lamar


 Count me in for one too, Paul.

 Barry Doublestein
 Atlanta Glasair SII FT
 N59BD


 Hi Paul

 I do have a question,did someone try this device in flight?
 did someone face with fuel leaks with this slide throttle kit before??/
 Jean Prudhomme


 Not yet but it is going to fly any minute now.

 Slide throttle have been used on Mazda racing engines for 30 years.

 Yes. We had slide throttle leaks on the original dyno version but we fixed
 that with 1/64th (.015) thick gasket material. Now all raw excess fuel
 is captured and runs into the engine.

 The engine is running fine and the slide throttle is working slick
 as snot according to Mark Suspinski :)

 Paul Lamar



If you run your P Port all over the engine and install
the slide on the sparplug site and injectors location
do you think it can be a difference on performance.


Jean Prudhomme


Not recommended. It hurts the running of the engine at lower
RPMs. You want to keep the throttle as close to the rotor
housing as possible. Steve Beckham on here put the throttles
just inside the rotor housings. At part throttle the runners
store exhaust gas due to valve overlap and make the engine
miss. This was discovered almost as soon as people started
building Wankels. The NSU Wankel spider engine had the throttle
in the p-port rotor housing way back in the middle 1960's.


Paul Lamar



As Paul said, the prototype slide throttle is working hunky-dorey on my
pport.  Even at max static rpm, there is no hesitation or binding on the
slide.  Since my model left the "Lamar International"
factory, there were a few improvements to the design which Paul attached in
an earlier message already (so don't be surprised if the pic of mine from
the first response doesn't match the drawings).

The one important bit is to use the proper gasketing material (Paul leap in
here & say what it is).  During start (we prime 4 - 6 pushes on the ec2
before start), fuel does tend to collect in the slide & if the gasket
material is wrong it will end up leaking out onto the exhaust (not a good
thing).  This excess fuel in the slide causes the engine to run rich for the
first couple of seconds.  After the engine gets running for a bit & sucks it
all out it all settles down nicely.

We're a couple weeks away from first flight -- mostly due to me taking the
kids to the House of Mouse next week.  I fighting a few sensor issues (sure
would be nice to know how much fuel is in the tank) before calling the DAR.
The throttle has worked flawlessly during our high speed taxis.

Mark (Rocky Mtn High)

*BTW - the only issue I have with the slide throttle in it's current
incarnation is that it's a bit tough to "tune" the position of the slide vs
position of the throttle handle.  This is due to the intake tubes being
curved, so you can't visually see the exact position of the slide for any
given throttle position.   In my case, it is possible (due to the position
of the holes in the slide itself) to go a bit beyond WOT - which starts
closing off the opening again.  Thus I have to hold it all together in
position without the cover plate attached, adjust the connection so throttle
handle WOT is when the slide is exactly at WOT, and then bolt it all
together.  Not an enormous problem by any means, just a bit more work.

Also, be prepared for a bit of creative routing for the throttle cable.  On
some ships, getting from a centrally mounted throttle handle over the port
side of the engine can be a bit of work.