I could use oneKeith Menard 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 theh
  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


 I could use one Keith Menard.


Paul,

Please put me down for one.

Joe Graham

You read my mind. I was just working on the final drawing.
I talked to my pilot buddy down in Torrance yesterday that is going
to make the parts. He builds a lot of parts for Boeing and Airbus.
His tig welder is an artist as he tigs welds aluminum 8 hours
a day day in and day out.

He wants to build the whole thing including tig welding them up.

But that is a costly thing for me to do as the tubing bends
alone are about $30 each. I am sure he would not do less than
ten at a time.

If ten people come up with half the cost I might be able to
swing it. Or perhaps everybody sends me bent tubing.

Shop around and see if you can find tubing bends cheaper
than Burns Stainless is charging. Two inch OD .065 wall 180 degree
bend. http://www.burnsstainless.com/

Here are some pictures  of his shop.

He also just acquired a large Fadal NC mill so he will do the
spacer as well.

Paul Lamar