X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-05.southeast.rr.com ([24.25.9.104] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2149741 for flyrotary@lancaironline.net; Sat, 30 Jun 2007 08:23:22 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.104; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-05.southeast.rr.com (8.13.6/8.13.6) with SMTP id l5UCMOP8003810 for ; Sat, 30 Jun 2007 08:22:24 -0400 (EDT) Message-ID: <001401c7bb11$4e0902c0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Brazing was [FlyRotary] Re: PP Construction.. Date: Sat, 30 Jun 2007 08:22:19 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C7BAEF.C6B24370" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C7BAEF.C6B24370 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Dave, I was just responding to Doug on whether I thought the H2000 aluminum = brazing rod (pretty amazing stuff) would work to braze the PP tube to = the outer aluminum surface of a rotor housing. I think it would- = provide you are able heat up the housing sufficiently.=20 While I find PP very intriguing, I realize that since I don't fly to = the power capability of my stock 13B, there would not be much point on = investing the time and money for a PP. Yes, it could be nice on take = off, but then I throttle back to my normal 7.5-8 gph economy cruise. So = it just doesn't seem to make it worth the effort - for me and my way of = flying. =20 However, for those who want high speed cruise it sounds like a good way = to go. The problem is other than Richard Sohn and his PP single rotor, = I don't know of anyone who has actually done it, much less flying with = one. The exception is the $$ PowerSport engine - nice PP, nice power - = but expensive. Ed ----- Original Message -----=20 From: david mccandless=20 To: Rotary motors in aircraft=20 Sent: Friday, June 29, 2007 10:24 PM Subject: [FlyRotary] Re: PP Construction.. On 30, Jun , at 9:08 AM, Ed Anderson wrote: Doug, I have not tried that particular brazing job, but I think it = would be much better than just about any other method so far mentioned. = However, that rotor housing is a large mass of aluminum to get up to = temperature brazing temperature, so it would probably take a high BTU = torch and perhaps a larger propane tank (like for the BBQ grill) rather = than the smaller bottles. I would certainly try it on a junk housing = first. But, seeing what they did in the H2000 video with that stuff, I = would say it's certainly worth a try.=20 =20 =20 Ed Hi Ed and Doug, I have been following the posts on al brazing, but I am not sure I = have this right.=20 Are you suggesting that a SS Pport tube could be TIG welded to the = steel liner inside the rotor housing and brazed to the cast aluminum = housing on the outside? This sounds like the ultimate solution=20 BR, Dave McC ------=_NextPart_000_0011_01C7BAEF.C6B24370 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Dave,

I was just responding to Doug on whether I = thought the=20 H2000 aluminum brazing rod (pretty amazing stuff) would work to braze = the PP=20 tube to the outer aluminum surface of a rotor housing. I think it = would-=20 provide you are able heat up the housing = sufficiently.

While I find PP very intriguing, I realize = that=20 since I don't fly to the power capability of my stock 13B, there would = not be=20 much point on investing the time and money for a PP. Yes, it could = be nice=20 on take off, but then I throttle back to my normal 7.5-8 gph economy=20 cruise. So it just doesn't seem to make it worth the effort - for = me and=20 my way of flying.

However, for those who want high speed cruise it = sounds=20 like a good way to go. The problem is other than Richard = Sohn and=20 his PP single rotor, I don't know of anyone who has actually done it, = much less=20 flying with one. The exception is the $$ PowerSport engine - nice = PP, nice=20 power - but expensive.

----- Original Message -----

From:=20 david=20 mccandless

To: Rotary motors in = aircraft

Sent: Friday, June 29, 2007 = 10:24=20 PM

Subject: [FlyRotary] Re: PP=20 Construction..

On 30, Jun , at 9:08 AM, Ed Anderson wrote:

Doug, I have not tried that particular brazing job, but I = think=20 it would be much better than just about any other method so far=20 mentioned. However, that rotor housing is a large = mass of=20 aluminum to get up to temperature brazing temperature, so it would = probably=20 take a high BTU torch and perhaps a larger propane tank (like for = the BBQ=20 grill) rather than the smaller bottles. I would = certainly try it=20 on a junk housing first. But, seeing what they did in the = H2000 video=20 with that stuff, I would say it's certainly worth a = try.

&nb= sp;
Ed

Hi=20 Ed and Doug,
I have been following the posts on al brazing, but I = am not=20 sure I have this right.
Are you suggesting that a SS Pport tube = could be=20 TIG welded to the steel liner inside the rotor housing and brazed to = the cast=20 aluminum housing on the outside?
This sounds like the ultimate = solution=20
BR, Dave McC
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