Return-Path: Received: from bree.pipcom.com ([204.92.62.3] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with SMTP id 2586734 for flyrotary@lancaironline.net; Sat, 20 Sep 2003 07:35:01 -0400 Received: (qmail 23093 invoked from network); 20 Sep 2003 11:34:58 -0000 Received: from ras3-20.pipcom.com (HELO new) (204.92.62.152) by bree.pipcom.com with SMTP; 20 Sep 2003 11:34:58 -0000 Message-ID: <001f01c37f6a$d6340460$0b3cfea9@new> From: "Peter Cowan/Lexy Cameron" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Rotary Boats Date: Sat, 20 Sep 2003 07:25:31 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001A_01C37F48.5F96D840" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C37F48.5F96D840 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message Subject: [FlyRotary] Re: Whats good for Racing is necessarily good for = aircraft was Re: Intake questions This may be just side commentary and a useless data point, but for = what it's worth here is another somewhat different comparison. Also I've = copied Jon Lauter on this because he must have some more knowledgeable = input. I have one of Jon's Rotary Power Marine engines in a boat. (Cut = that laughter right now). He rated it at 175hp and has a short manifold = to a carb just above it on the intake side of the engine (also = distributer ignition, turbo block and rotors).=20 My "dyno" comparison is with the previous engine a 150hp johnson = outboard (Will you guys cut that out?) The current installation must be = well over 100lbs heavier due to the conversion from an outboard to a = stern drive but turning only 4500 I'm the same speed as the 150 hp so I = feel pretty comfortable that should I let this get up to 6500 I'd have = that 175. Pretty scientific, I know. Hopefully Jon will respond. By the way, it is really nice cooling a boat engine! Peter Peter, just the guy I want to talk too. I'm converting a 4.3L Chevy = stern drive boat to rotary power so I'm curious about what you used to = interface the 13B to the stern drive. I figure I'll be droping about = 150 pounds. =20 I have assumed that RPM is doing jet drive boats but maybe they = have stern drive stuff too? I seem to have lost Jon's email address so = would appreciate it if you could pass that along.=20 BTW, I used to fly a 135 HP Johnson outboard. Now *you* stop = laughing : ) Tracy Hello Tracy. Jon is at: RPMCinfo@aol.com Phone is: 516-656-5685 When I bought this engine a couple of years ago, his standard = bellhousing was designed to mate to a Morse transmission bolt pattern = (this is a common marine transmission interface). My stern drive was = Volvo. So that they could utilize existing marine engines, Volvo made a = short adapter section which mated to their transom plate design (round = rubber donut) at the back and an engine with a morse bell housing at the = front and a suitable splined shaft inside. So for me to convert to the = mazda was not very much more than unbolting the volvo and bolting in the = adapter and the mazda. The crazy part of my change over was that I was having difficulty = locating the correct length adapter (they were made in different = lengths) and also a used one was going to be 5 or $600. One day I went out to my storage shed to look at the old Volvo/Chris = Craft V8 I'd bought primarily to have a spare outdrive. Lo and behold = there was the adapter I needed right on the engine. The only change I = had to make was putting some spacer's under Jon's flex plate/damper to = position it properly on the spline. And, hey, I'm not laughing. I'd always thought that outboards should = fly. Peter ------=_NextPart_000_001A_01C37F48.5F96D840 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 

Subject: [FlyRotary] Re: Whats good for Racing is = necessarily good=20 for aircraft was Re: Intake questions

This may be just side commentary = and a useless=20 data point, but for what it's worth here is another somewhat = different=20 comparison. Also I've copied Jon Lauter on this because he must have = some=20 more knowledgeable input. I have one of Jon's Rotary Power Marine=20  engines in a boat. (Cut that laughter right now). He rated it = at 175hp=20 and has a short manifold to a carb just above it on the intake side = of the=20 engine (also distributer ignition, turbo block and rotors). =
My "dyno" comparison is with the = previous=20 engine a 150hp johnson outboard (Will you guys cut that out?)  = The=20 current installation must be well over 100lbs heavier due to the = conversion=20 from an outboard to a stern drive but turning only 4500 I'm the same = speed=20 as the 150 hp so I feel pretty comfortable that should I let this = get up to=20 6500 I'd have that 175. Pretty scientific, I know.
Hopefully Jon will = respond.
By the way, it is really nice = cooling a boat=20 engine!
Peter
 
Peter, just the guy I want to talk = too. =20 I'm converting a 4.3L Chevy stern drive boat to rotary power so I'm = curious=20 about what you used to interface the 13B to the stern drive.  I = figure=20 I'll be droping about 150 pounds.  
 I have assumed that RPM is = doing jet=20 drive boats but maybe they have stern drive stuff too?  I seem = to have=20 lost Jon's email address so would appreciate it if you could pass = that=20 along. 
 
BTW, I used to fly a 135 HP Johnson = outboard.   Now  *you* stop laughing : )
 
Tracy
 
Hello Tracy.
Jon is at:   RPMCinfo@aol.com
 
Phone is:   = 516-656-5685
 
When I bought this engine a couple = of years=20 ago, his standard bellhousing was designed to mate to a Morse = transmission=20 bolt pattern (this is a common marine transmission interface). My = stern=20 drive was Volvo. So that they could utilize existing marine engines, = Volvo=20 made a short adapter section which mated to their transom plate = design=20 (round rubber donut) at the back and an engine with a morse bell = housing at=20 the front and a suitable splined shaft inside. So for me to convert = to the=20 mazda was not very much more than unbolting the volvo and bolting in = the=20 adapter and the mazda.
The crazy part of my change over = was that I was=20 having difficulty locating the correct length adapter (they were = made in=20 different lengths) and also a used one was going to be 5 or=20 $600.
One day I went out to my storage = shed to look=20 at the old Volvo/Chris Craft V8 I'd bought primarily to have a spare = outdrive. Lo and behold there was the adapter I needed right on the = engine.=20 The only change I had to make was putting some spacer's under Jon's = flex=20 plate/damper to position it properly on the spline.
And, hey, I'm not laughing. I'd = always thought=20 that outboards should fly.
Peter
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