Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 3230239 for flyrotary@lancaironline.net; Thu, 13 May 2004 07:52:26 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i4DBqNSn015214 for ; Thu, 13 May 2004 07:52:24 -0400 (EDT) Message-ID: <004b01c438e0$c2a2dea0$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Detonated... the reasons why?? (long) Date: Thu, 13 May 2004 07:52:25 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0048_01C438BF.3B5A5020" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0048_01C438BF.3B5A5020 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks for the comprehensive report, Todd. You did good - especially = considering all the distractions! Wow! As you pointed out, you did the = critical thing just right - FLY THE AIRPLANE! Assuming you were pulling = at least 7 psi at 6300 (likely to have been more) my calculations = indicate you could have been producing approx 230HP. That would = certainly increase the heat load dramatically leading to your high temps = and contributing to detonation. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Haywire=20 To: Rotary motors in aircraft=20 Sent: Thursday, May 13, 2004 5:04 AM Subject: [FlyRotary] Detonated... the reasons why?? (long) Like everything in aviation it's not usually one thing that gets you, = but rather a culmination of many little things. The original plan for this flight was for my buddy (great pilot, = shitty mechanic) to fly the plane while I looked after the engine. First = lesson... stick with the plan. While taxi testing with me in the left = seat (Dynon in front of me, EM2 in front of buddy), all was good so we = felt it was good to go and asked for T/O clearance. Both agreed I might = as well fly it. Second factor; I have an electronic governor for my IVO prop which = I have previously calibrated on the ground, but while it works in flight = it needs to have some in-flight tweaking of the calibration to perform = better, so I just generally control it manually until I have more time = to play with it. During full power run-up, I briefly played with the = auto settings, before switching back to manual. While in auto it must = have went full coarse and when I switched back to manual it stayed = there. Prop pitch is on my pre-T/O check list, but it seems to have = gotten by me. But this wasn't a problem yet... " SNIP" all this I never forgot to just "fly the damn airplane", but I still = feel extremely foolish as in the seat beside me was a qualified pilot = looking at an engine monitor for an engine that he didn't understand, = while I was more than able to comprehend everything on that monitor but = as a (very) low time pilot I was trying to do too much at once. If he'd = been in the left seat, I'd have been freed up to closely monitor and = control every aspect of the engine. I pretty much accept full responsibility for this little episode = and consider it "pilot error" and not the fault of the engine. I welcome = any other opinions if anybody has another take on it. (I already know = that I was a dumbass, so you can hold on to that one :-) S. Todd Bartrim Turbo 13B RV-9Endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Whatever you vividly imagine, Ardently desire, Sincerely believe = in, Enthusiastically act upon, Must inevitably come to pass".=20 ------=_NextPart_000_0048_01C438BF.3B5A5020 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks for the comprehensive report, = Todd. =20 You did good - especially considering all the distractions! Wow!  = As you=20 pointed out, you did the critical thing just right - FLY THE = AIRPLANE! =20 Assuming you were pulling at least 7 psi at 6300 (likely to have been = more) my=20 calculations indicate you could have been producing approx 230HP.  = That=20 would certainly increase the heat load dramatically leading to your high = temps=20 and contributing to detonation.
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 Haywire
Sent: Thursday, May 13, 2004 = 5:04=20 AM
Subject: [FlyRotary] = Detonated... the=20 reasons why?? (long)

Like = everything in=20 aviation it's not usually one thing that gets you, but rather a = culmination of=20 many little things.
    The original plan for this flight was for my buddy (great = pilot, shitty=20 mechanic) to fly the plane while I looked after the engine. First = lesson...=20 stick with the plan. While taxi testing with me in the left seat = (Dynon in=20 front of me, EM2 in front of buddy), all was good so we felt it was = good to go=20 and asked for T/O clearance. Both agreed I might as well fly=20 it.
    Second factor; I have an electronic governor for my IVO prop = which I=20 have previously calibrated on the ground, but while it works in flight = it=20 needs to have some in-flight tweaking of the calibration to perform = better, so=20 I just generally control it manually until I have more time to play = with it.=20 During full power run-up, I briefly played with the auto settings, = before=20 switching back to manual. While in auto it must have went full coarse = and when=20 I switched back to manual it stayed there. Prop pitch is on my pre-T/O = check=20 list, but it seems to have gotten by me. But this wasn't a problem=20 yet...
  "   = SNIP"
all this I = never forgot to=20 just "fly the damn airplane", but I still feel extremely foolish as in = the=20 seat beside me was a qualified pilot looking at an engine monitor for = an=20 engine that he didn't understand, while I was more than able to = comprehend=20 everything on that monitor but as a (very) low time pilot I = was=20 trying to do too much at once. If he'd been in the left seat, I'd have = been=20 freed up to closely monitor and control every aspect of the=20 engine.
    I pretty much accept full responsibility for this little = episode and=20 consider it "pilot error" and not the fault of the engine. I welcome = any other=20 opinions if anybody has another take on it. (I already know that I = was a=20 dumbass, so you can hold on to that one :-)

S. Todd Bartrim
Turbo 13B = RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

=   =20 "Whatever you vividly imagine, Ardently desire, Sincerely believe in,=20 Enthusiastically act upon, Must inevitably come to pass".

 
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