Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 341477 for flyrotary@lancaironline.net; Sun, 01 Aug 2004 07:18:37 -0400 Received-SPF: error receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from EDWARD (cpe-069-132-183-211.carolina.rr.com [69.132.183.211]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i71BI5Ns025193 for ; Sun, 1 Aug 2004 07:18:06 -0400 (EDT) Message-ID: <001501c477b9$3b51d3d0$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: New Monster Prop Date: Sun, 1 Aug 2004 07:18:11 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01C47797.B40E2750" 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_0012_01C47797.B40E2750 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, Tracy and I had the same prop on our 2.17 drives and got = essentially the same static rpm 5200 (although at times I have gotten up = to 5800 rpm - cooler mornings). Tracy informed me that with his 74x88 = and 2.85 that his static went up to 6200 rpm. So I would expect the = same with the same prop. Tracy, however, felt a larger prop than what = he order might improve performance even more. So I ordered one that was = 2" longer 76x88 just to see. If it turns out to be a bit too large, the prop manufacture will trim it = back to the 74 inches. It is a long thing. If it turns out that I produce the 6200 rpm static (it will likely be = slightly less than that with the longer prop), but if I did - that would = be an approx 25-30HP increase in power turning a much larger prop. The = increased torque from the 2.85 should provide sufficient torque to twirl = that hummer around 2100 rpm for take off. The prop of course will turn = slower with the 2.85 - but, slower and larger is supposedly more = efficient. =20 Apparently the thrust produced by such a large diameter prop is = considerable at low airspeeds and climb. Based on Tracy's performance = and my first hand observation of his take off it improves those areas of = performance considerably. Also, Tracy did not suffer any top end lost = in speed. Since, I normally cruise at 170 MPH IAS (just hate to burn = fuel at those prices) any potential lost of top speed is of no = consequence to me. I wanted something to get my butt off the ground and = above the tree tops quicker. It looks like this should do it. I am suppose to get the gear box this coming week. So need to order a = new spinner for the prop and stop all this messing around with a = microchip and get back to REAL flying. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Steve Brooks=20 To: Rotary motors in aircraft=20 Sent: Saturday, July 31, 2004 7:39 PM Subject: [FlyRotary] Re: New Monster Prop Ed, Congratulations on the new prop, and soon to be 2.85:1 drive. It will = be interesting to see what the results are from the higher RPM's. What = HP do you expect to make, and at what RPM ? =20 =20 Steve Brooks =20 =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On = Behalf Of Ed Anderson Sent: Saturday, July 31, 2004 4:00 PM To: Rotary motors in aircraft Subject: [FlyRotary] New Monster Prop =20 Well, Rusty =20 Eat your heart out. Got my new monster prop from Performance Props = yesterday. Again, a beautiful piece of woodwork. Its about 8 1/2" = longer than my old prop. My heart skipped a beat as I was pulling the = new prop out of its shipping container as I happened to glance over at = my old prop sitting on the floor - when the thought hit me! Did I tell = Clark this one was conventional Rotation?????? Whew! was sure glad to = see the blades twisted the opposite of my old prop {:>) =20 Got an email from Laura who told me to ship $$ as they were shipping = my modified gear box to me next week. So timing is pretty good all the = way around. =20 =20 It turns out the Prop is approx 1/4 thicker than my old prop - but I = had a 1/4" spacer so I'll be able to use the same prop bolts - rather = than popping close to $200 for a new set. =20 Well, got to go wipe the dust off the new prop {:>) =20 Ed =20 Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ------=_NextPart_000_0012_01C47797.B40E2750 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Well, Tracy and I had the same prop on = our 2.17=20 drives and got essentially the same static rpm 5200 (although at times I = have=20 gotten up to 5800 rpm - cooler mornings).  Tracy informed me that = with his=20 74x88 and 2.85 that his static went up to 6200 rpm.  So I would = expect the=20 same with the same prop.  Tracy, however, felt a larger prop than = what he=20 order might improve performance even more.  So I ordered one that = was 2"=20 longer 76x88 just to see.
If it turns out to be a bit too large, = the prop=20 manufacture will trim it back to the 74 inches.  It is a long=20 thing.
 
If it turns out that I produce the =  6200 rpm=20 static (it will likely be slightly less than that with the longer prop), = but if=20 I did - that would be an approx 25-30HP increase in power turning a much = larger=20 prop.  The increased torque from the 2.85 should provide sufficient = torque=20 to twirl that hummer around 2100 rpm for take off.  The prop of = course will=20 turn slower with the 2.85 - but, slower and larger is supposedly more=20 efficient. 
 
Apparently the thrust produced by such = a large=20 diameter prop is considerable at low airspeeds and climb.  Based on = Tracy's=20 performance and my first hand observation of his take off it improves = those=20 areas of performance considerably.  Also, Tracy did not suffer any = top end=20 lost in speed.  Since, I normally cruise at 170 MPH IAS (just hate = to burn=20 fuel at those prices) any potential lost of top speed is of no = consequence to=20 me.  I wanted something to get my butt off the ground and above the = tree=20 tops quicker.  It looks like this should do it.
 
I am suppose to get the gear box this = coming=20 week.  So need to order a new spinner for the prop and stop all = this=20 messing around with a microchip and get back to REAL = flying.
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 Steve = Brooks
Sent: Saturday, July 31, 2004 = 7:39=20 PM
Subject: [FlyRotary] Re: New = Monster=20 Prop

Ed,

Congratulations=20 on the new prop, and soon to be 2.85:1 drive.  It will be interesting to = see what the=20 results are from the higher RPM=92s. =20 What HP do you expect to make, and at what RPM ?  =

 

Steve=20 Brooks

 

 

-----Original=20 Message-----
From: = Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Ed = Anderson
Sent: Saturday, July 31, 2004 = 4:00=20 PM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 New Monster Prop

 

Well,=20 Rusty

 

Eat=20 your heart out.  Got my new monster prop from Performance Props=20 yesterday.  Again, a beautiful piece of woodwork.  Its about = 8 1/2"=20 longer than my old prop.  My heart skipped a beat as I was = pulling the=20 new prop out of its shipping container as I happened to glance over at = my old=20 prop sitting on the floor - when the thought hit me!  Did I tell = Clark=20 this one was conventional Rotation??????  Whew!   was = sure glad=20 to see the blades twisted the opposite of my old prop=20 {:>)

 

Got an=20 email from Laura who told me to ship $$ as they were shipping my = modified gear=20 box to me next week.  So timing is pretty good all the way = around. =20

 

It=20 turns out the Prop is approx 1/4 thicker than my old prop - but I had = a 1/4"=20 spacer so I'll be able to use the same prop bolts - rather than = popping close=20 to $200 for a new set.

 

Well,=20 got to go wipe the dust off the new prop {:>)

 

Ed

 

Ed=20 Anderson
RV-6A N494BW Rotary Powered
Matthews, = NC

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