Received-SPF: pass
 receiver=logan.com; client-ip=205.152.59.66; envelope-from=ceengland@bellsouth.net
Message-ID: <4122573D.1000500@bellsouth.net>
Date: Tue, 17 Aug 2004 14:06:37 -0500
From: Charlie England <ceengland@bellsouth.net>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax)
MIME-Version: 1.0
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] P-P Surprise
References: <list-367957@logan.com>
In-Reply-To: <list-367957@logan.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Richard wrote:

> In developing the intake system for the one-rotor, I got some 
> surprise. When I got to the point of running both ports, side and P-P, 
> on one carb each, I tried to coordinate the cup(close-up butterfly) 
> with the carbs, there was no impact from the cup at idle or anywhere 
> else up to 3500RPM. Starting the engine with the cup full open was 
> normal. Naturally, I removed the  cup and the engine is just running 
> fine. Throttle response with the P-P carb alone is very smooth and 
> solid. Idle speed is now at 1500RPM with the mixture not optimized yet.
> So much for the cup in my case only.
> I what I observed here holds up, the combo port idea may be dead 
> making the one rotor a more simple and better engine.
> This also reminded me of the NSU Wankel Spider, which did not have a 
> cup and was running very fine.
>  
> Richard Sohn
> N-2071U
> unicorn@gdsys.net <mailto:unicorn@gdsys.net>

As the Laugh-In Nazi used to say,"Veeelly interesting."

I've been asking people since long before I got booted off the other 
list if they knew of anyone who had run a PP with electronic injection 
instead of carbs to prove that it was the PP itself causing the idle 
problem & not bad mixture & mixture distribution due to the low flow 
rate & bad tuning issues of carbs at idle. (Top *that* for a run-on 
sentence.) I always got the answer that the problem was due to overlap 
between the adjacent chambers in each rotor but no one ever said that EI 
had been tried on a PP 2rotor.

Ken Powell needs stop his world traveling &  get his PP running so it 
can be proven whether it's overlap or bad induction causing bad idle.

Charlie