Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 761082 for flyrotary@lancaironline.net; Sat, 26 Feb 2005 21:17:03 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.rr.com [24.74.185.127]) by ms-smtp-04-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j1R2GDCi005814 for ; Sat, 26 Feb 2005 21:16:14 -0500 (EST) Message-ID: <001401c51c72$54ae3680$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Monster Prop Air Brake Date: Sat, 26 Feb 2005 21:16:21 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C51C48.6B8E5440" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C51C48.6B8E5440 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, it would seem there is a connection (at least on two occasions - = mine and yours) between being "throttled way back" and a more rapid = rate of descent than expected. My experience with the old prop/gearbox = (never had a hard landing like that) was that pulling the power back to = 2000 rpm simply slowly bled off airspeed (assuming you didn't lower the = nose) but with this prop/gearbox is seems it is a sudden and large = magnitude change. =20 I am going to experiment some more (at altitude), but there is a = definite connection (at least in the 80-90 mph range on my bird) between = what appears to be a sudden change from a non-factor to an "air brake" = factor. {:>). Until I decide otherwise, I will keep my rpm above 2800 = on final. Glad to see you back in the air, John. I am interested, when you get to = that point, about your performance with the modified turbo. Ed ----- Original Message -----=20 From: John Slade=20 To: Rotary motors in aircraft=20 Sent: Saturday, February 26, 2005 9:04 PM Subject: [FlyRotary] Re: Monster Prop Air Brake So don't know whether this theory holds water, but the effect is there = and I found today that keep the engine at 3200 rpm resulted in a = considerably difference. Any ideas from you prop guys??=20 I'm no prop guy, but ... That makes sense to me, Ed, and it might also have been a factor in my = prop strike incident. This was the first time I'd been able to get a = smooth idle, and I was throttled way back. My prop is a pretty big bad = boy too. It might have been giving me some drag I wasn't expecting. I = flew it again today (prop fixed with flox) and kept the speed up this = time. No problems. No vibration.=20 John ------=_NextPart_000_0011_01C51C48.6B8E5440 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Well, it would seem there is a = connection (at least=20 on two occasions - mine and yours)  between being "throttled way = back" and=20 a more rapid rate of descent than expected. My experience with the = old=20 prop/gearbox  (never had a hard landing like that)  was that = pulling=20 the power back to 2000 rpm simply slowly bled off airspeed (assuming you = didn't=20 lower the nose) but with this prop/gearbox is seems it is a sudden and = large=20 magnitude change.  
 
 I am going to experiment some = more (at=20 altitude), but there is a definite connection (at least in the 80-90 mph = range=20 on my bird) between what appears to be a  sudden change from a = non-factor=20 to an "air brake" factor. {:>).  Until I decide otherwise, I = will keep=20 my rpm above 2800 on final.
 
Glad to see you back in the air, = John.  I am=20 interested, when you get to that point, about your performance with the = modified=20 turbo.
 
Ed
----- Original Message -----
From:=20 John=20 Slade
Sent: Saturday, February 26, = 2005 9:04=20 PM
Subject: [FlyRotary] Re: = Monster Prop Air=20 Brake

So don't know whether this = theory holds=20 water, but the effect is there and I found today that keep the engine = at 3200=20 rpm resulted in a considerably difference.  Any  ideas from = you prop=20 guys?? 
 
I'm no prop guy, but = ...
That makes = sense to me,=20 Ed, and it might also have been a factor in my prop strike incident. = This was=20 the first time I'd been able to get a smooth idle, and I was throttled = way=20 back. My prop is a pretty big bad boy too. It might have been giving = me some=20 drag I wasn't expecting. I flew it again today (prop fixed with flox) = and kept=20 the speed up this time. No problems. No vibration. =
John
 
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