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Hello Richard,
Did you see my endhousing pattern?
From what I have gathered from you and Jerry is
that you open with the Le Mans and close 1.5" later and Jerry closes with the Le
Mans and opens 1.5" earlier.
So both might be fine, I just seen a little more
chance for exhaust contamination for the early opening and am unsure if the
later opening sees any compression with the 1.5" manifold tubes - which provide
more velocity than the 2" . This velocity is more important at idle(
overcoming exhaust and backpressure) and our RPM range around 6,000 to
7,500 rpm.
George (down under)
Richard,
running my engine will be in late summer. It is a time and money thing. Both
are in short supply.. Jerry
On Monday, March 14, 2005, at 09:32 PM, Richard
Sohn wrote:
Hi Jerry, my p-port opens
the same as the LeMans with also 1,5 opening, and still idles fine with just
the carb. I am looking at closing it later than it is now for the final
tuning, but I do not plan to open it any later. Believe me, I was surprised
when I saw the engine run like that the first time. I think on the 13B
housing(12A is running now) it looks like a 2" round port will give
me about the same characteristics.
How
far are you away from running your
engine?
Richard
Sohn
N-2071U
-----
Original Message -----
From:
Jerry Hey
To: Rotary motors in
aircraft
Sent: Monday, March 14, 2005 3:28
PM
Subject: [FlyRotary] Re: peripheral ports
Hi Richard, my
p port opens much later than the Leman's and it closes about the same. It is
1.5 dia so obviously it cannot match the plus two inch of the Leman's port
as far as timing is concerned. If you want the actual degree for the opening
and closing events I can dig them out for you no problem. I admire your work
and intend to copy the one rotor next year. Jerry
On Monday,
March 14, 2005, at 01:26 PM, Richard Sohn wrote:
-----
Original Message -----
From: Jerry Hey
To:
Rotary motors in aircraft
Sent: Monday, March 14, 2005 5:33
AM
Subject: [FlyRotary] Re: peripheral ports
On Monday,
March 14, 2005, at 08:02 AM, Paul wrote:
Paul, all the
companies you list sell housings with BIG p - ports and massive overlap.
They are designed to develop tremendous hp at high rpm for racing. Of course
they don't idle smoothly. These engines have nothing to do with the smaller,
conservatively timed p ports that we wish to use as aircraft engines.
Jerry
Jerry,
what are you calling consevatively timed
p-ports?
Just want to see were I stand with mine.
Richard
Sohn
N-2071U
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