Patrick Stapelberg wrote:

Last night I read a well written article in contact magazine about a guy

that went against all your believes,and had a successful rotary conversion.

1) This guy had a water to oil exchanger in his oilpan.(said to bring the
oil temp down 20 degrees, and even the water temp went down.)

That's gone. One of the reasons we no longer believe in it.

2) Had three simple pressure compensated side draught carbs.( no need for
sophisticated fuel pumps,oscilloscopes ect.)

Those are gone. (Except for Finn) Not enough power.
Intake runners too short.

3) a Engine mounted from the oil pan.

That works. Not as well as I would like. I am shooting for automotive
vibration levels which is to say undetectable.

4)a Simple muffler.

That is gone. It worked fine. Tracy's was a bit too thin
and only lasted 600 hours or there about. Still works fine on
Dave Atkins airplane made from Inconel. Tracy is still trying new
mufflers.

Then the shock,.... this was written by Tracy Cook.
What went wrong with all these ideas, it all seemed to work well.
(it must be painful to have a newcomer to group and having to draw pictures
agian)

Thank's for the newsletter.
Patrick

I just can't let this go by. Let's talk hours! Tracy's got nearly 1200. I've got
more than 200 in 1.5 years. My installation works just fine, thank you.
Please realize that you never have enough power! Until you realize that power
comes with a price: gas. I practically never fly with WOT except during take-off
and that's just to impress the bystanders.
Bottom line: the 3 carbs work just fine. Fuel injection and tuned intake runners
works better, but does come with a price: injection controller, high pressure
pumps and lines, "complicated" intake manifold. Sure I'd go with fuel injection
now if I started from scratch.

I still think the reason Tracy's original thin-wall muffler gave out was because
he changed to turbo housings (no exhaust splitters).

Finn

Patrick if you want the full chronological history of all this get the
ACRE-NL CD. Now up to almost 400 meg with almost four years of discussion,
pictures, drawings and graphs.

Paul Lamar
 
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