X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4124914 for flyrotary@lancaironline.net; Sun, 14 Feb 2010 15:33:05 -0500 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (mail.aanet.com.au [203.24.100.34]) by poplet2.per.eftel.com (Postfix) with ESMTP id A761E173888 for ; Mon, 15 Feb 2010 04:32:24 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id C6D57BEC012 for ; Mon, 15 Feb 2010 04:32:22 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] PP Housings Date: Mon, 15 Feb 2010 06:32:23 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CAAE08.A236EB40" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 100214-0, 02/14/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_000F_01CAAE08.A236EB40 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Kelly, As you can see Bill Jepson is my contact. I was going to e-mail him to = see if things were all set-up yet, however he has spoken out on it = anyway. George (down under) George, Do you have any contact info for the ex "Powersport" type PP = housings ??............. =20 -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from "George Lendich" = : --------------=20 Bill, I have stated this before and I will gain, my calculations indicate = a 44mm inlet ( per rotor) being the size needed to 7,500 rpm - giving = max inlet velocity ( of 100/120 mph). It wasn't until I seen that the = Powersport PP inlet tubes were 44mm that I was reassured I was on the = right track. Others that we know push for the 3" ( 75mm) TB, such as the = Renesis TB, nice that it is. Not many builders will go to 7,500 rpm so 44mm is slightly overkill. Probably could go as low as 38 to 40mm for lower RPM, but I would = have to crunch the numbers. At the time I was thinking I would have to = go to 7,500 RPM on the single rotor to get max take-off performance, so = worked with those numbers. Of course the lower the inlet diameter the = higher the velocity and the better the VE. Lynn spoke of 38mm and 44mm chokes, If I remember correctly and = chokes they are in his racing application of much higher rpm, but the = trade-off is inlet velocity. I know one of the ex-Powersport people are making ( machining) 44mm = PP with 2 piece inlet tubes and fitting them to housings with O rings. I = believe this service is available to anyone interested. Information = passed to me was that Powersport never had any sealing problems after = they went to this arrangement. Believe you me, they spent a fortune on = development. I'm just wondering how I'm going to get my housing over there to get = it done. George ( down under)=20 ------=_NextPart_000_000F_01CAAE08.A236EB40 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
 Kelly,
As you can see Bill Jepson is my = contact. I was=20 going to e-mail him to see if things were all set-up = yet,=20 however he has spoken out on it anyway.
George (down under)
George,
   Do you have any contact info for the = ex "Powersport"=20 type PP housings ??.............  
--
Kelly Troyer
"Dyke = Delta"_13B=20 ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil = Manifold=20
--------------=20 Original message from "George Lendich" <lendich@aanet.com.au>:=20 --------------

Bill,
I have stated this before and I = will gain, my=20 calculations indicate a 44mm inlet ( per rotor) being the size = needed to=20 7,500 rpm - giving max inlet velocity ( of 100/120 mph). It wasn't = until I=20 seen that the Powersport PP inlet tubes were 44mm that I was = reassured I was=20 on the right track. Others that we know push for the 3" ( 75mm) TB,=20 such as the Renesis TB, nice that it is.
 
Not many builders will go to 7,500 = rpm so 44mm=20 is slightly overkill.
Probably could go as low as 38 to = 40mm for=20 lower RPM, but I would have to crunch the numbers. At the time I was = thinking I would have to go to 7,500 RPM on the single rotor to get = max=20 take-off performance, so worked with those numbers. Of course the = lower the=20 inlet diameter the higher the velocity and the better the = VE.
 
Lynn spoke of 38mm and 44mm chokes, = If I=20 remember correctly and chokes they are in his racing=20 application of much higher rpm, but the trade-off is inlet=20 velocity.
 
I know one of the ex-Powersport = people are=20 making ( machining) 44mm PP with 2 piece inlet tubes and = fitting them=20 to housings with O rings. I believe this service is available to = anyone=20 interested. Information passed to me was that Powersport never had = any=20 sealing problems after they went to this arrangement. Believe you = me, they=20 spent a fortune on development.
 
I'm just wondering how I'm going to = get my=20 housing over there to get it done.
George ( down = under) 

 
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