Speaking of tuning.
I'll tell you I was impressed when Dave Lemon slapped a 58 mm
downdraft Weber on our p-port engine and got over 240 HP right out
of the box at 6800 to 7300 RPM. I never did get the EFI to work
right on the dyno.


Paul Lamar ...No rotor no motor.


I'm new to your list so please bear with me if the answer to these questions
are well known:

1. Do you have any read material explaining what mods you did to this specific engine.


2. Except for carb heat & cooling requirements, can this engine be used in
a flying configuration with the current intake system as is? (240 HP without EFI
sounds excellent!)

3. Is the P-porting done in the standard way?

Regards,

Hennie

1. Yes we do. We have a bunch of pictures and other stuff. Start by looking at all
the stuff on: http://www.rotaryeng.net/intake.html
And then get back to me with specific questions.

2. Not really. You need to put a couple  of aircraft carbs on there
capable of being leaned and handling about 130 HP each.
A pair of Ellison Throttle Bodies would probably work.
http://www.ellison-fluid-systems.com
Two EFS-3A's might work.

The runners must point down as most aircraft carbs are up draft.
that will preclude the muffler under the cowl so the muffler will
become external under the fuse.

3. See http://www.rotaryeng.net/intake.html

Paul Lamar


Paul,

I've followed your discussions for a month or so and read all the recommended stuff on
the links as mentioned. I do realize that there are prove and correct ways to
install a rotary engine in an aircraft and I am not at all trying to debate that.

I am just curious though. The intake system as in your pics looks so simple and yet
seem to surprise even you. Is there therefore no way that such a simple system, giving
such high HP (I realize it's about more than just dyno measured HP) can be applied
with only minor mods like carb heat, as is, into a flying configuration?

I've read recently in this list that the Weber sort of does it's own leaning and/or
altitude compensation by default in it's standard form. (apparently just the way the
carb works in it's natural state)

At an air show in South Africa, I saw a flying rotary installation without the normal
oil cooler and this builder informed me that he mixes his normal automotive fuel
with car oil for lubrication. Is this method used in more installations or is this
just looking for trouble, even if done properly?

Was this a Mazda Rotary?  There have been some smaller rotarys with
charge rather than oil cooled rotors.  A Mazda will not run very long
without an oil cooler.

Hans



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