Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP id 405130 for flyrotary@lancaironline.net; Fri, 10 Sep 2004 07:50:50 -0400 Received-SPF: none receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from EDWARD (cpe-069-132-183-211.carolina.rr.com [69.132.183.211]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i8ABoJPg018545 for ; Fri, 10 Sep 2004 07:50:21 -0400 (EDT) Message-ID: <000a01c4972c$5aa8e5b0$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: First engine run with Monster Prop Date: Fri, 10 Sep 2004 07:50:22 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C4970A.D3522660" 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_0007_01C4970A.D3522660 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Good Point, Dave Tracy told me that he first flew his new prop taking off on only 4400 = rpm - so that tends to indicate swinging a big prop (even slowly) moves = lots of air. Now, if I can just get the spinner successfully painted, I = can go flying next week. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: DaveLeonard=20 To: Rotary motors in aircraft=20 Sent: Friday, September 10, 2004 1:04 AM Subject: [FlyRotary] Re: First engine run with Monster Prop Ed, if nothing else, this prop will be more efficient so with the same = hp you will notice an improvement, especially in climb. Dave Leonard ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Thursday, September 09, 2004 2:07 PM Subject: [FlyRotary] First engine run with Monster Prop Ok, got out today and fired up the engine with the new prop and = gear box. This is the 76x88 inch prop that is 2" longer than the one = Tracy and Rusty have on their birds. The static was 5400 rpm at 28.75" = with ambient manifold pressure reading 29.75" (as best I interpolated). = OAT was 87F. Idle was considerably smoother whether due to increased = mass of larger prop, new gear box or both. I did notice the 2.85 has = considerably less gear lash than the 2.17. I took it for a quick taxi up and down our 35' wide runway and = notice that the "P" effect was considerable at full power. It felt like = someone was taking the nose of the aircraft and forcefully shoving it to = the left. Rudder with Nose wheel helping kept things under control = without any problem, but I think my first full power takeoffs will be = where they have those 100 -150' wide runways - just to be safe.{:>). = Subjectively seemed to have considerable more acceleration but will not = do any definitive test on this runway. Temperatures were normal. After extended runup the oil temps = approached 190F and coolant temp got up to 210F this is what I would = normally see. Considering that the static rpm was the same as my old = gearbox and prop, it likely I was producing the same HP and therefore = would not expect major difference. The larger prop did not seem to = interfere with the cooling airflow - at least on the ground. The RPM is a bit less than I had hoped for - but may just indicate = that the 2" increased diameter over the ones flying now (74x88) is a bit = more prop than is optimum. I will fly with it and record the data so = that Performance Propellers will know how much to trim when I ship it = back. Hope to get the spinner painted over the weekend and go flying = early next week. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC Hi, Ed...in the military I was fortunate enough to have the = opportunity to fly a few aircraft that are, as the military feels a need = to do to their aircraft, overpowered. In New Mexico, I had a brief = flight in a P-51. A definate torque machine. The accepted method for = takeoff was to apply power gently, until enough airspeed is achieved = that the rudder has more authority. (Of course ailerons and other = controls will also slowly gain more authority). Once the tailwheel was = up and flying speed was attained, only then was more power added. I = also flew the U-6 (Beaver) in Viet Nam.....we were also limited on = takeoff power. Once flying speed was attained, more power could be = added. Probably will work for the RVs with "the club" as well. = Wouldn't hurt to try it. Congrats on getting your engine, prop/redrive = assembled. Thanks for keeping us informed with your progress and test = results. Paul Conner, 13b powered SQ2000 at the airport and ready for = taxi testing. ------=_NextPart_000_0007_01C4970A.D3522660 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Good Point, Dave
 
Tracy told me that he first flew his = new prop=20 taking off on only 4400 rpm - so that tends to indicate swinging a big = prop=20 (even slowly) moves lots of air.  Now, if I can just get the = spinner=20 successfully painted, I can go flying next week.
 
Ed
 
 Ed Anderson
RV-6A = N494BW Rotary=20 Powered
Matthews, NC
----- Original Message -----
From:=20 DaveLeonard=20
Sent: Friday, September 10, = 2004 1:04=20 AM
Subject: [FlyRotary] Re: First = engine run=20 with Monster Prop

Ed, = if nothing=20 else, this prop will be more efficient so with the same hp you will = notice an=20 improvement, especially in climb.
 
Dave = Leonard
----- Original Message ----- =
From:=20 Ed Anderson
To: Rotary motors in = aircraft=20
Sent: Thursday, September = 09, 2004=20 2:07 PM
Subject: [FlyRotary] First = engine run=20 with Monster Prop

Ok, got out today and fired up = the engine=20 with the new prop and gear box.  This is the 76x88 inch prop = that is=20 2" longer than the one Tracy and Rusty have on their birds.  = The=20 static was 5400 rpm at 28.75" with ambient manifold pressure = reading=20 29.75" (as best I interpolated). OAT was 87F.  Idle was=20 considerably smoother whether due to increased mass of larger = prop, new=20 gear box or both.  I did notice the 2.85 has considerably = less gear=20 lash than the 2.17.
 
 I took it for a quick taxi = up and down=20 our 35' wide runway and notice that the "P" effect was = considerable at=20 full power.  It felt like someone was taking the nose of the = aircraft=20 and forcefully shoving it to the left.  Rudder with Nose = wheel=20 helping kept things under control without any problem, but I think = my=20 first full power takeoffs will be where they have those 100 -150' = wide=20 runways - just to be safe.{:>).  Subjectively seemed to = have=20 considerable more acceleration but will not do any definitive = test on=20 this runway.
 
Temperatures were normal.  = After=20 extended runup the oil temps approached 190F and coolant temp got = up to=20 210F this is what I would normally see.  Considering that the = static=20 rpm was the same as my old gearbox and prop, it likely I was = producing the=20 same HP and therefore would not expect major difference.  The = larger=20 prop did not seem to interfere with the cooling airflow - at least = on the=20 ground.
 
The RPM is a bit less than I had = hoped for=20 - but may just indicate that the 2" increased diameter over = the ones=20 flying now (74x88) is a bit more prop than is optimum.  I = will fly=20 with it and record the data so that Performance Propellers will = know how=20 much to trim when I ship it back.
 
Hope to get the spinner painted = over the=20 weekend and go flying early next week.
 
Ed
 
 
Ed Anderson
RV-6A N494BW = Rotary=20 Powered
Matthews, NC
 
Hi, Ed...in the military I was = fortunate=20 enough to have the opportunity to fly a few aircraft that are, as = the=20 military feels a need to do to their aircraft,  = overpowered.  In=20 New Mexico, I had a brief flight in a P-51.  A definate = torque=20 machine.  The accepted method for takeoff was to apply power = gently,=20 until enough airspeed is achieved that the rudder has more = authority. (Of=20 course ailerons and other controls will also slowly gain more=20 authority).  Once the tailwheel was up and flying speed was = attained,=20 only then was more power added.  I also flew the U-6 (Beaver) = in Viet=20 Nam.....we were also limited on takeoff power. Once flying speed = was=20 attained, more power could be added.  Probably will work for = the RVs=20 with "the club" as well.  Wouldn't hurt to try it.  = Congrats on=20 getting your engine, prop/redrive assembled.  Thanks for = keeping us=20 informed with your progress and test results.  Paul Conner, = 13b=20 powered SQ2000 at the airport and ready for taxi=20 = testing.
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