X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.25.9.101] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2150525 for flyrotary@lancaironline.net; Sat, 30 Jun 2007 19:06:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; 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-02.southeast.rr.com (8.13.6/8.13.6) with SMTP id l5UN5wUS005966 for ; Sat, 30 Jun 2007 19:05:58 -0400 (EDT) Message-ID: <001301c7bb6b$36573c50$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Brazing was [FlyRotary] Re: PP Construction.. Date: Sat, 30 Jun 2007 19:05:54 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C7BB49.AEF70720" 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_0010_01C7BB49.AEF70720 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I agree, George, When you've gotta have the power, then you've gotta = have the power. I am certainly not Poo-Pooing PP at all. I have just (belatedly) come = to realize (in the wisdom of my old age), that just because something is = available that can do x,y, and z, I really don't need it if all I plan = to do is x {:>). I am certainly eager to see some of you guys work this out - who knows I = may not be able to resist {:>) Ed ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Saturday, June 30, 2007 5:39 PM Subject: [FlyRotary] Re: Brazing was [FlyRotary] Re: PP Construction.. Ed, All true, but PP comes into it's own when you need that extra power = to match the size of the aircraft. I'm pursuing the single for those aircraft that need just a bit more = than 100 hp. I think Richard is doing a great job in this area, and I hope he is = successful. George ( down under)=20 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_0010_01C7BB49.AEF70720 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I agree, George, When you've gotta have the = power, then=20 you've gotta have the power.
 
  I am certainly not Poo-Pooing PP at = all.  I=20 have just (belatedly) come to realize (in the wisdom of my old age), = that just=20 because something is available that can do = x,y, and=20 z, I really don't need it if all I plan to do is=20 x {:>).
 
I am certainly eager to see some of you guys = work this out=20 - who knows I may not be able to resist {:>)
 
Ed
----- Original Message -----
From:=20 George=20 Lendich
Sent: Saturday, June 30, 2007 = 5:39=20 PM
Subject: [FlyRotary] Re: = Brazing was=20 [FlyRotary] Re: PP Construction..

Ed,
All true, but PP comes into it's = own when you=20 need that extra power to match the size of the = aircraft.
I'm pursuing the single for those = aircraft that=20 need just a bit more than 100 hp.
I think Richard is doing a great = job in this=20 area, and I hope he is successful.
George ( down = under) 
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=20 would- provide you are able heat up the housing=20 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=20 be much point on investing the time and money for a PP.  Yes, = it could=20 be nice 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=20 and my way of flying. 
 
However, for those who want high speed = cruise it=20 sounds like a good way to go.  The problem is other than  = Richard=20 Sohn and his PP single rotor, I don't know of anyone who has = actually done=20 it, much less flying with one.  The exception is the $$ = PowerSport=20 engine - nice PP, nice power - but expensive.
 
Ed
----- Original Message ----- =
From:=20 david=20 mccandless
To: Rotary motors in = aircraft=20
Sent: Friday, June 29, 2007 = 10:24=20 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=20 think it would be much better than just about any other method = so far=20 mentioned.  However, that rotor housing  is  a = large mass=20 of aluminum to get up to temperature brazing temperature, so it = would=20 probably take a high BTU torch and perhaps a larger propane tank = (like=20 for the BBQ grill)  rather than the smaller bottles.  = I would=20 certainly try it on a junk housing first.  But, seeing what = they=20 did in the H2000 video with that stuff, I would say it's = certainly worth=20 a=20 try. 
 
&nb= sp;
Ed

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