Subject: Slide throttle
From: Rotary Engine
Date: 1/10/2007, 9:16 AM
To: AARotary Engine


How is the slide throttle project doing?  Did Doc find a machine  shop
to take it on?    Jerry

Tooling and fixtures are being made as I write this. I have  ordered two
prototypes. The machinist says he expects the finish to be 12 microinches or
less. I am planning on having them hard anodized as the estimated   cost is
minimal and the corrosion resistance of value, especially if  mogas users get
a batch with alcohol in it. If someone wants bare aluminum that  can  be an
option.

There will be two models, one short and one long. The throttle
characteristics are identical, the only difference is the  throttle cable
mechanical attachments. The short version is for the A-750 cable,   the long
for the A-1760 as listed in the Aircraft Spruce catalog. I will discuss the
attachment details and relative merits a at a later time.

My recovery from hip replacement surgery is going much better than I
expected, less than 3 weeks post-op. I plan to visit the machine   shop later
this week for an update. I will update the newsletter after that visit. I
also plan on setting up a web site.

I hope to return to work on the RV9-A in a few weeks.

Doc Custer
Retired Software Engineer and sometime Audiologist

Any idea on the price? I have started collecting the components for a
PP engine to replace my Cosmo 13B one day.

Bulent "Buly" Aliev
FXE Ft lauderdale, FL
 http://tinyurl.com/dcy36


No info on price yet. A lot depends on how many people buy as the tooling
and one-time charges are pretty high.

I should have some more info on the per unit costs Monday if the machinist
gets a complete set of parts made (except for the PTFE slide). By then he
should also have a bill for the fixtures, tooling and NC programming, and
production run setup costs.

If the outside shop charges too much for the slide, I will look into using a
pre-ground Teflon sheet. It is expensive (~$40 per slide), and I am hoping
the outside shop will come in at considerably less.

The good news is it should be a high quality unit, suitable for aircraft
use.

What color anodizing does the group want? Gold, blue or ? Suggestions
welcome. All will have to be the same color as the charge for anodizing is
for a batch, unless you are willing to pay for a custom run.

Doc Custer
Retired Software Engineer and sometime Audiologist

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