Subject: Slide throttle
From: Rotary Engine
Date: 1/9/2007, 3:33 PM
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

Are there any plans for making a model to fit the 20B?

Robin


No current plans, but I would be willing to do it given enough interest.
Anybody besides Robin interested? Is the port spacing for the third rotor
the same as for a two rotor?

UPDATE: I visited the machinist this noon. He is half done doing the NC
programs. I forgot to ask about the tooling/fixtures. He said he expects
**some** of the parts to be machined by Monday. He found a shop to do the
PFTE (Teflon is a trade name) as they have the experience and would probably
be cheaper. Also waiting on materials.

Doc Custer
Retired Software Engineer and sometime Audiologist




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