Return-Path: Received: from smtpauth07.mail.atl.earthlink.net ([209.86.89.67] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 814924 for flyrotary@lancaironline.net; Mon, 21 Mar 2005 21:40:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.86.89.67; envelope-from=jerryhey@earthlink.net Received: from [65.176.161.140] (helo=earthlink.net) by smtpauth07.mail.atl.earthlink.net with asmtp (Exim 4.34) id 1DDZJ0-0004uC-CP for flyrotary@lancaironline.net; Mon, 21 Mar 2005 21:39:43 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=simple; s=test1; d=earthlink.net; h=Date:Subject:Content-Type:Mime-Version:From:To:Content-Transfer-Encoding:In-Reply-To:Message-Id:X-Mailer; b=UPxeWewBp/lAZCSkQb/SEG4GJjP/pEYtMme3dtnBfZbSBeKAIgDj/DcIHwyvs23D; Date: Mon, 21 Mar 2005 21:41:01 -0500 Subject: Re: [FlyRotary] Re: P port intake design Content-Type: text/plain; delsp=yes; charset=US-ASCII; format=flowed Mime-Version: 1.0 (Apple Message framework v552) From: Jerry Hey To: "Rotary motors in aircraft" Content-Transfer-Encoding: 7bit In-Reply-To: Message-Id: X-Mailer: Apple Mail (2.552) X-ELNK-Trace: 8104856d7830ec6b1aa676d7e74259b7b3291a7d08dfec79651ba54881c92e76d42cb58f6568b045350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 65.176.161.140 I agree Richard. I often think of your results. I would love to move the butterfly to the plenum. There is so much to learn now. You have built the first running engine (not counting Power Sport who does not share data) and your results are contrary to popular wisdom. I have seen a number of cars with P ports and carbs mounted on little 9 inch long inlet tubes that certainly do have EXCELLENT throttle response. Their idles were smooth enough too. Wish my engine was on the test stand now instead of just talking about it. Jerry On Monday, March 21, 2005, at 10:53 PM, Richard Sohn wrote: > Jerry, > your injector problem may go away when you find out that the close-up > butterfly may not be must as much as it is published. I went through > that the whole way. > > Richard Sohn > N-2071U > > > ----- Original Message ----- From: "Jerry Hey" > To: "Rotary motors in aircraft" > Sent: Monday, March 21, 2005 4:36 PM > Subject: [FlyRotary] Re: P port intake design > > >> 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" >>> To: "Rotary motors in aircraft" >>> 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 >>>> >>>> >>> >>> >>> --------------------------------------------------------------------- >>> -- ----- >>> ---- >>> >>> >>> >>> >>> >>> >>> --------------------------------------------------------------------- >>> -- ----- >>> ---- >>> >>> >>>>>> Homepage: http://www.flyrotary.com/ >>>>>> Archive: http://lancaironline.net/lists/flyrotary/List.html >>>> >>> >>> >>> >>>>> Homepage: http://www.flyrotary.com/ >>>>> Archive: http://lancaironline.net/lists/flyrotary/List.html >>> >> >> >>>> Homepage: http://www.flyrotary.com/ >>>> Archive: http://lancaironline.net/lists/flyrotary/List.html > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html >