Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 98916 for flyrotary@lancaironline.net; Tue, 01 Jun 2004 08:28:47 -0400 Received: from rad ([65.6.194.9]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040601122817.ZDMF19385.imf25aec.mail.bellsouth.net@rad> for ; Tue, 1 Jun 2004 08:28:17 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: blow off Date: Tue, 1 Jun 2004 07:28:21 -0500 Message-ID: <00dc01c447d3$ed58ae20$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00DD_01C447AA.0482A620" 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_00DD_01C447AA.0482A620 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Yes. what's the spring set at?=20 =20 The stock spring was way up there, maybe 15 psi, and there is also an adjustment to vary the spring pressure. I used local hardware store = springs to get about 5 psi. With the right combination of springs you can make = any pressure you want, but the only way to test it was on the engine. I set = up a rig to use my compressor, but it just doesn't move enough air to match what the engine will do. =20 =20 >Unless you can modify the turbo to be controllable, it's not safe. You forget - I've already tested a blown turbo scenario. The plane = climbs fine. I'm considering the pop off for detonation protection.=20 =20 You think that's the only failure mode a turbo has? Are you planning = to test them all :-) =20 Technically Keith's wasn't an off-airport landing, it was an off-runway landing, although he did include part of the runway in his 290 ft. :) =20 =20 I stand corrected :-) =20 My original goal of the POV was to set it low, and raise it once I = proved that I could control the turbo. Since the stock wastegate can't control = the turbo, I never got beyond the initial safety net phase, though I did = raise the setting for a couple tests. =20 =20 Cheers, Rusty (still need a plenum)=20 =20 =20 ------=_NextPart_000_00DD_01C447AA.0482A620 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Yes. what's = the spring=20 set at? 
 
The stock=20 spring was way up there, maybe 15 psi, and there is also an adjustment = to vary=20 the spring pressure.  I used local hardware store springs to = get about=20 5 psi.  With the right combination of springs you can make any = pressure you=20 want, but the only way to test it was on the engine.  I = set up a=20 rig to use my compressor, but it just doesn't move enough air to=20 match what the engine will do. =20  
 
=
>Unless you can modify = the turbo=20 to be controllable, it's not safe.
You forget - I've already tested a blown turbo scenario. = The plane=20 climbs fine. I'm considering the pop off for detonation = protection. 
 
You think=20 that's the only failure mode a turbo has?   Are you planning to test them all =20 :-)
 
Technically Keith's wasn't an off-airport = landing, it=20 was an off-runway landing, although he did include part of the runway in = his 290=20 ft. :)  
 
I stand corrected :-)
 
My original = goal of the=20 POV was to set it low, and raise it once I proved that I could = control the=20 turbo.  Since the stock wastegate can't control the turbo, I never = got=20 beyond the initial safety net phase, though I did raise the setting for = a couple=20 tests.  
 
Cheers,
Rusty (still = need a=20 plenum) 
 
 
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