>
    > BTW Tom what is the status of my order?
    >
    > Paul Lamar
    >
    > Paul and others interested in the slide throttle. I'm having some
   trouble
    > getting
    > the .25 spacer to cut well. So I'm looking into and found a CNC
   shop in
    > Placerville,
    > run by a fellow aviator. He has CNC 4th axes capability and CNC
   lathe. So I'm
    > going
    > to meet with him and discuss the possibility of a production run
   of the Slide
    > throttle. He is building a kit fox and I may swing him to the
   single rotor idea.
    > I'll let you all know what happens. T.W.
    >
    > OK Tom, If it turns out to be too expensive NC water jet will do
   a good
    > job at low cost as I had some 1/2" intake manifold flanges cut
   out about 5 years
    > ago. I sold most of those to people on here.
    >
    > Paul Lamar

   I have been wondering about this spacer - why not just cut the 4
   pieces (one for each side) on a table saw then glue/rivet the pieces
   to the sides.  Quick and easy with no wasted material.

   Ken Powell
   Bryant, Arkansas
   501-847-4721
   C150 / RV-4


There is a sealing issue in the corners with that Ken. No easy way I can think
of so far except welding the four pieces together and that would
probably add too much distortion and cost. You might get away with epoxy
or some other sealant but that seems problematic.
The aluminum scrap is 2.5" by 13" by .25" thick which weighs .8 pounds or
$2.50 worth. Of course if you have a shop you can recycle
that :)

See the web site for details.
http://www.rotaryeng.net/Tom_Weber-slide-throttle2.jpg

BTW the drawings with dimensions on the web site are obsolete
as Tom has done away with the slots by going up to .25 inch thick for
the Teflon and the spacer and changing the way the push pull
cable is fastened to the Teflon slide.

Use .012" thick gasket material from McMaster Carr to seal
the plates to the spacers. This is an essential step as the
Teflon manufacturing tolerance are such that is is
inevitable thicker than .25 inch. +.030 -.015

A 12 by 12 inch sheet of 1/4 inch thick is $50.44
enough for three slides. Page 3282 Cat. 108

Don't buy glass filled Teflon or PTFE. The coef. of friction is
way higher despite what they claim.

If you want even lower friction (+/- six pounds worst case throttle
cable force.) you can get bondable Teflon film .020 inch
thick to be bonded to the insides of the plates. In this
case you will need 12 by 24 inch sheets. $17.23 Enough
for two complete slide throttles.

So far we have found this step unnecessary.

Paul Lamar.



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