Ed,  you are right on all counts.  Space and Ease of fabrication and  the idea of cold side fuel all play a part.  If I go to an injector  close the the butterfly such as Power Sport is doing, then I will have  to go to a single injector as there is not room down there for two. I  like using two injectors if I can.  P ports (if the runners are not  too large) can generate some howling velocities, probably more than an  intake with four runners, that I hope will help with the throttle  response.  But we shall see.  This is an experiment and I will change  what does not work. Jerry



On Monday, March 21, 2005, at 07:08 PM, Ed Anderson wrote:

No error Jerry, but wonder why are you putting the injectors so far  away
from the port? Space? Ease of fabrication?   I tried putting my four
injectors 21 inches away from the port myself and found that while I could
not tell any difference in power( up or down), I found a distinctive
hesitation bog if I opened the throttle quickly.  Also it was hell to start
on a cold morning.  But, a PP port may be a different animal in those
regards - actually cold starting should be OK as any liquid fuel will flow
down hill.  With my plugs up it has to flow up hill {:>).

Good luck, we are all eagerly awaiting the results and I have two  almost new
rotor housings just waiting.

Ed Anderson
----- Original Message -----
From: "Jerry Hey" <jerryhey@earthlink.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, March 21, 2005 6:34 PM
Subject: [FlyRotary] P port intake design

I've been messing with the p port intake design.  I think it is about
ready to build.  If anybody sees a glaring stupidity or even a subtle
one, please let me know.

Still to be resolved is which injectors to use.  Tracy,  do  you have
any suggestions?  Using the 80 per cent rule, I need injectors for
around 260 hp.   Thanks  Jerry

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