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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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