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.

Mark Supinski,

You've done a very nice install.  Let us know how the inspection and
first
flight goes, and how the slide throttle works in actual flight
conditions.

Mark S.
Austin (Rocky Mountain Low)

BTW - Did you get around to re-doing that fuel rail mount?


Mark Supinski,

Get one of those cheap Harbor Freight bore scopes and stuff it down
the intake tube. It will also be useful for inspecting your muffler.
The kit will have the correct dimensions so when the slide is fully
open the holes in the slide will align with the tube openings.
The slide throttle you have is a prototype. I am sorry it was not
correctly made.

Paul Lamar


Rick wrote:
I would be interested and perhaps another friend if it were for a 20b.

Rick Irwin

Perhaps you can get together with Mark Steitle.

Paul Lamar