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 4127263 for flyrotary@lancaironline.net; Tue, 16 Feb 2010 16:41:41 -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 97601173948 for ; Wed, 17 Feb 2010 05:41:05 +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 CE5B6BEC05F for ; Wed, 17 Feb 2010 05:41:04 +0800 (WST) Message-ID: <8F07FAFA8E984549AD782795DBEDBC39@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A. Renesis to turbo Date: Wed, 17 Feb 2010 07:41:05 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01CAAFA4.8FD2BA90" 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 100216-1, 02/16/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0033_01CAAFA4.8FD2BA90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dennis, I worked on the speed of sound ( same principle) for the 44mm at = 6,000rpm. I took the distance from the inside of the rotor housing to = the inlet plenum. The wave is also reflected as the sound wave reverses = when it hits the end of the inlet tube. Yours might be enhanced = somewhat, using the closing opposite port . I don't know which system is = better. You have to get optimum length first go with your system, = whereas a straight system can be tuned by having a trombone style tube = ending for fine tuning to the desired RPM. What we need is a trombone = style that is adjustable. George ( down under) Geroge & Bill The 44 inches is calculated based on the distance a reflected wave = (traveling at the speed of sound) will travel during the time between = the closing of rotor #1 intake (wave created) to the when the intake on = rotor #2 is about 50 % closed. My intake design uses 1 3/8 OD x 1 1/4 = ID aluminum tubing purchased from Performance Tubing. The curves in the = intake are designed to carry the sound wave from one rotor intake to the = other intake while operating at 6200 rpm. Air is fed into the tubes at = the center where the rectangular section is located. The large intake = with the TB is 3 in. aluminum. The first picture is the intake as installed on my airplane - the = second picture is a top view during construction - I built a wooden = fixture to hold everything together and assist in welding. The manifold = flange is cut out of a 4 port Renesis intake. The third picture shows = the bottom piece of the intake in the fixture and the top half resting = on the top of the fixture. I have other pictures of the internal parts = if you need them. Bill, do you have any ideas on how to build multiple copies of it? Dennis H. George Lendich wrote: Bryan, I missed where the 43" came from, however from my calculations for = 44mm inlet tube, my calculations came to 21.36". That's for a straight = tube inlet manifold. That's interesting isn't it. George (down under) This is hard for me to visualize as well. Perhaps if you get a = chance, you could snap a picture from the top. Did you get 43 in. from #1 secondary to #2 secondary? Bryan -------------------------------------------------------------------------= - From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Bradburry Sent: Monday, February 15, 2010 11:29 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: rpm vs Power was : Throttle limits was = Re: N.A. Renesis to turbo Dennis, I just looked at your picture again.the secondary look much longer = than the primaries. It may be an optical illusion??? I bet you mean 1 = 1/8 id?? Bill B=20 -------------------------------------------------------------------------= - From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On Behalf Of Dennis Haverlah Sent: Monday, February 15, 2010 11:03 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: rpm vs Power was : Throttle limits was = Re: N.A. Renesis to turbo All my tubes are the same length and the same diameters. I can = check but I think they were 1 1/4 id. and 1 1/4 od. Bill Bradburry wrote: Dennis, Aren't your primary and secondary tubes different lengths from = rotor face to rotor face? If so, what are the two lengths? Are they = different diameters? Bill B -------------------------------------------------------------------------= - -------------------------------------------------------------------------= - -------------------------------------------------------------------------= ----- -------------------------------------------------------------------------= ----- -------------------------------------------------------------------------= ----- -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0033_01CAAFA4.8FD2BA90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Dennis,
I worked on the speed of sound ( same = principle)=20 for the 44mm at 6,000rpm. I took the distance from the inside of the = rotor=20 housing to the inlet plenum. The wave is also reflected as the = sound wave=20 reverses when it hits the end of the inlet tube.  Yours might be = enhanced=20 somewhat, using the closing opposite port . I don't know which = system is=20 better. You have to get optimum length first go with your system, = whereas a=20 straight system can be tuned by having a trombone style tube = ending for=20 fine tuning to the desired RPM. What we need is a trombone style that is = adjustable.
George ( down under)
 
Geroge & = Bill

The 44=20 inches is calculated based on the distance a reflected wave (traveling = at the=20 speed of sound) will travel during the time between the closing of = rotor #1=20 intake (wave created) to the when the intake on rotor #2 is about 50 % = closed.  My intake design uses 1 3/8 OD  x  1 1/4 ID = aluminum=20 tubing purchased from Performance Tubing.  The curves in the = intake are=20 designed to carry the sound wave from one rotor intake to the other = intake=20 while operating at 6200 rpm.  Air is fed into the tubes at the = center=20 where the rectangular section is located.  The large intake with = the TB=20 is 3 in. aluminum.

The first picture is the intake as installed = on my=20 airplane - the second picture is a top view during construction - = I =20 built a wooden fixture to hold everything together and assist in=20 welding.  The manifold flange is cut out of a 4 port Renesis=20 intake.  The third picture shows the bottom piece of the intake = in the=20 fixture and the top half resting on the top of the fixture. I have = other=20 pictures of the internal parts if you need them.

Bill, do you = have any=20 ideas on how to build multiple copies of it?

Dennis = H.

George=20 Lendich wrote:
Bryan,
I missed where the 43" came from, = however from=20 my calculations for 44mm inlet tube, my calculations came to 21.36". = That's=20 for a straight tube inlet manifold. That's interesting isn't=20 it.
George (down under)

This is = hard for=20 me to visualize as well.  Perhaps if you get a chance, you = could snap=20 a picture from the top.

Did you = get 43=20 in. from #1 secondary to #2 = secondary?

Bryan

From: = Rotary motors in = aircraft [mailto:flyrotary@lancaironlin= e.net]=20 On Behalf Of Bill=20 Bradburry
Sent: = Monday,=20 February 15, 2010 11:29 PM
To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: = rpm vs Power=20 was : Throttle limits was Re: N.A. Renesis to = turbo

Dennis,

I just looked at your picture = again=85the secondary=20 look much longer than the primaries.  It may be an optical=20 illusion???  I bet you mean 1 1/8 = id??

Bill = B 

From:=20 Rotary motors in = aircraft [mailto:flyrotary@lancaironlin= e.net]=20 On Behalf Of = Dennis=20 Haverlah
Sent: = Monday,=20 February 15, 2010 11:03 PM
To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: = rpm vs Power=20 was : Throttle limits was Re: N.A. Renesis to=20 turbo

All my tubes are the same length and the = same=20 diameters.  I can check but I think they were 1 1/4 id. and 1 = 1/4=20 od.

Bill Bradburry wrote:

Denn= is,

Aren=92t your primary and secondary = tubes different=20 lengths from rotor face to rotor face?   If so, what are = the two=20 lengths?  Are they different = diameters?

Bill = B

=

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Homepage:  http://www.flyrotary.com/
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