Return-Path: <13brv3@bellsouth.net> Received: from [205.152.59.69] (HELO imf21aec.bellsouth.net) by logan.com (CommuniGate Pro SMTP 4.1b9) with ESMTP id 2481009 for flyrotary@lancaironline.net; Mon, 21 Jul 2003 14:04:31 -0400 Received: from rad ([68.212.3.144]) by imf21aec.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030721180425.JOQK16013.imf21aec.bellsouth.net@rad> for ; Mon, 21 Jul 2003 14:04:25 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: single rotor engine Date: Mon, 21 Jul 2003 13:04:26 -0500 Message-ID: <000001c34fb2$860826c0$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C34F88.9D321EC0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C34F88.9D321EC0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable now, lets see. A single rotor with aluminum side housings turning 7500 rpm..... =20 Ed Anderson =20 Funny you should mention this, since I've been thinking about single = rotor engines recently. I've been wondering just how light you could make the engine, and if those aluminum side housings were still available. Last = I heard, they were about $1500 each, but that was a long time ago. The thought came up while looking for an engine for the Airbike project. = I'm not sure a single rotor could be made light enough for the Airbike, but = it could probably replace a full VW engine in something like a KR-1 (have plans), or a Corby Starlet (future project). =20 =20 For the single rotor to be most effective, I'm thinking that you would = want a high rpm engine, with a high numerical ratio PSRU. A lightweight belt drive would be preferred, or better yet, a direct drive ducted fan. I = loved the Jet Hawk that was advertised for a while, but understand that it suffered from a terrible homemade fan assembly. =20 =20 Here are some questions for anyone who might wish to play along :-) =20 If you had to make an estimate, what would a stock block weigh, in = single rotor configuration? By this, I mean with iron housings, and no water pump, flywheel, intakes etc. Since a normal 13B block weighs about 190 = lb, I'm guessing this would be around 110 lb. =20 =20 How much lighter are the aluminum side housings? =20 How much HP could you make in direct drive mode, at say 3500 rpm. =20 =20 Does anyone currently offer eccentric shafts for a single rotor = conversion? I know Atkins made some, as did others probably. Could you modify a two rotor shaft, or would it have to be made from scratch? =20 =20 That's all for now. =20 =20 Thanks, Rusty =20 =20 =20 ------=_NextPart_000_0001_01C34F88.9D321EC0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

now, lets see. A single rotor with aluminum = side housings turning 7500 rpm.....

Ed Anderson

Funny you should mention this, = since I’ve been thinking about single rotor engines recently. I’ve been wondering just how light you could make the engine, and if those = aluminum side housings were still available. Last I heard, they were about $1500 each, = but that was a long time ago. The thought came up while looking for an = engine for the Airbike project. I’m not sure a single rotor could be = made light enough for the Airbike, but it could probably replace a full VW = engine in something like a KR-1 (have plans), or a Corby Starlet (future = project).

For the single rotor to be most = effective, I’m thinking that you would want a high rpm engine, with a high = numerical ratio PSRU. A lightweight belt drive would be preferred, or better = yet, a direct drive ducted fan. I loved the Jet Hawk that was advertised = for a while, but understand that it suffered from a terrible homemade fan assembly.

Here are some questions for anyone = who might wish to play along :-)

If you had to make an estimate, = what would a stock block weigh, in single rotor configuration? By this, = I mean with iron housings, and no water pump, flywheel, intakes etc. = Since a normal 13B block weighs about 190 lb, I’m guessing this would be = around 110 lb.

How much lighter are the aluminum = side housings?

How much HP could you make in = direct drive mode, at say 3500 rpm.

Does anyone currently offer = eccentric shafts for a single rotor conversion? I know Atkins made some, as = did others probably. Could you modify a two rotor shaft, or would it = have to be made from scratch?

That’s all for now. =

Thanks,

Rusty

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