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Date: Wed, 29 Jun 2005 20:52:55 -0500
Subject: Re: [FlyRotary] Re: P Ports working on dyno
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From: Jerry Hey <jerryhey@earthlink.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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On Wednesday, June 29, 2005, at 05:36 PM, George Lendich wrote:

>
>> From Paul Lamar's list it has just been posted that the p port engine
>> on the dyno at MazdaTrix with remote fuel injectors is now running 
>> very
>> well, developing 220 hp (this sounds like a 6000 rpm number to me but
>> the post did not say the rpm) and it is idling smoothly at 1000 rpm.  
>> I
>> can't speak about 4 ports or six ports but clearly cool side injection
>> will work with 2 ports.   Fine tuning can be expected to find more hp.
>>   Yahoo!!!    Jerry
>
> Jerry,
> I'm glad your not too busy to follow the progress, you will notice 
> that PL
> has mentioned he is NOW trying to seal the slide throttle, this might 
> have
> been one of his problems, as was suggested to me, by someone in the 
> know.
> Did you see my suggestion in this regard, in having the throttles 
> separate,
> as are the butterflies?
> I think he still may have a small problem with one inlet scavenging 
> from the
> other, with this duel connected slide.
>
> Something to watch for if you intend to go in this direction!
> Attached drawing!
> George ( down under)
> <Slide Throttle.GIF> Homepage:  http://www.flyrotary.com/
>>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html

George,  I think separating the throttles will be unavoidable if one 
wants to fine tune the engine.  As presently designed it is unlikely 
that the two rotors can be balanced as you have pointed out.   Not a 
problem for me as I am not tempted by the slide throttles, at least not 
  until they are perfected and shown to be superior to a regular 
butterfly.  BTW, 222 hp at 7500 rpm  leaves plenty of room for 
improvement. I would expect around 250 hp.  Plenty of work yet to be 
done....BUT this is a very good start.  Paul has accomplished a lot in 
a shot time.  I am so pleased (and relieved)  that the remote injectors 
worked as they did and that throttle response seems to be good.  As 
Paul said, to truly gage throttle response the engine will need a prop 
but it apparently reacts instantaneously in the dyno.      Jerry