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 5.2.14) with ESMTP id 3630827 for flyrotary@lancaironline.net; Sun, 03 May 2009 17:56:16 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from mail.aanet.com.au (mail.aanet.com.au [203.24.100.34]) by poplet2.per.eftel.com (Postfix) with ESMTP id A6B411739D5 for ; Mon, 4 May 2009 05:55:36 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by mail.aanet.com.au (Postfix) with SMTP id E3E18149C61E for ; Mon, 4 May 2009 05:55:34 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Harley Davidson Generator Date: Mon, 4 May 2009 07:55:37 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0025_01C9CC8D.B5FF9210" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 0617-3, 04/28/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0025_01C9CC8D.B5FF9210 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Todd, Cooling air is a good idea, the permanent magnets fail at a certain = temperature, can't remember what that is though. George ( down under) Not so sure about that. I still have allot of things on my plate and I = don't want to rush things, but will try to keep it on a front burner = now. You've got to be getting close to firing it up? I'm thinking about the cooling issue that you are addressing with fan = blades. How much heat do you think it will generate? I'm thinking/hoping = not much. I don't know about the original Harley install, but as this is = commonly used source of power, I got to looking at my Ski-Doo, ATV and = dirt bike. In everyone of them the stator/rotor is completely sealed up = and is not liquid or oil cooled. And I've never had issues with them. It = would be a simple matter for me to put a small baffle at the exit of one = of the evap cores that I use for cooling and direct some of the air over = the rotor, but due to the tight fit, not much air would find it's way = under to the stator.=20 I'm hoping this won't be an issue. What I'm hoping is that once = the issues around fitting it in place are resolved it will prove to be a = reliable, maintenance free back-up power source without adding any undue = complexity. Of course this what we are striving for with everything in = our airplanes. But previously I've found that some simple solutions to = problems end up causing enough little other issues that the complexity = results in anything but a simple solution. And once time & money gets = invested then there becomes an incentive to keep flogging a dead horse. I believe the concept is sound, the issue will be in making it fit = into existing RD-1? installations. If it is proven sound, then maybe = Tracy may consider working it into his RD-1 design to facilitate easier = installation, however I suspect that Tracy probably has too much other = stuff on his plate to get started reworking an already proven PSRU. Todd C-FSTB =20 On Sun, 2009-05-03 at 12:08 -0400, Ernest Christley wrote:=20 Todd Bartrim wrote: > Hi Ernest, Kelly and others; > I promised myself I wasn't going to do any experimenting this time = > around, but here I go again..... It's in your blood, ain't it. Sounds like you'll have your flying before I even get a first run. ------=_NextPart_000_0025_01C9CC8D.B5FF9210 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Todd,
Cooling air is a good idea, the = permanent magnets=20 fail at a certain temperature, can't remember what that is = though.
George ( down under)
Not=20 so sure about that. I still have allot of things on my plate and I = don't want=20 to rush things, but will try to keep it on a front burner now. You've = got to=20 be getting close to firing it up?

I'm thinking about the = cooling issue=20 that you are addressing with fan blades. How much heat do you think it = will=20 generate? I'm thinking/hoping not much. I don't know about the = original Harley=20 install, but as this is commonly used source of power, I got to = looking at my=20 Ski-Doo, ATV and dirt bike. In everyone of them the stator/rotor is = completely=20 sealed up and is not liquid or oil cooled. And I've never had issues = with=20 them. It would be a simple matter for me to put a small baffle at the = exit of=20 one of the evap cores that I use for cooling and direct some of the = air over=20 the rotor, but due to the tight fit, not much air would find it's way = under to=20 the stator.
    I'm hoping this won't be an issue. = What I'm=20 hoping is that once the issues around fitting it in place are resolved = it will=20 prove to be a reliable, maintenance free back-up power source without = adding=20 any undue complexity. Of course this what we are striving for with = everything=20 in our airplanes. But previously I've found that some simple solutions = to=20 problems end up causing enough little other issues that the complexity = results=20 in anything but a simple solution. And once time & money gets = invested=20 then there becomes an incentive to keep flogging a dead=20 horse.
    I believe the concept is sound, the issue = will be=20 in making it fit into existing RD-1? installations. If it is proven = sound,=20 then maybe Tracy may consider working it into his RD-1 design to = facilitate=20 easier installation, however I suspect that Tracy probably has too = much other=20 stuff on his plate to get started reworking an already proven=20 PSRU.

Todd
C-FSTB


On Sun, 2009-05-03 at 12:08 = -0400,=20 Ernest Christley wrote:=20 
Todd Bartrim wrote:
> Hi Ernest, Kelly and others;
>     I promised myself I wasn't going to do any experimenting this =
time=20
> around, but here I go again.....

It's in your blood, ain't it.
Sounds like you'll have your flying before I even get a first run.

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