X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.4.51.79] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1010520 for flyrotary@lancaironline.net; Wed, 22 Jun 2005 16:23:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.4.51.79; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 22 Jun 2005 13:22:32 -0700 Message-ID: Received: from 64.4.51.220 by BAY107-DAV7.phx.gbl with DAV; Wed, 22 Jun 2005 20:22:32 +0000 X-Originating-IP: [64.4.51.220] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Geardrive comments Date: Wed, 22 Jun 2005 16:22:24 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A5_01C57746.92BE2C80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Wed, 22 Jun 2005 16:22:24 -0400 X-OriginalArrivalTime: 22 Jun 2005 20:22:32.0661 (UTC) FILETIME=[1EC75050:01C57768] This is a multi-part message in MIME format. ------=_NextPart_000_00A5_01C57746.92BE2C80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message =20 Sorry Tracy, Someone suggested your 2.85 drive is different to your 2.17 - apart = from the obvious and necessary changes to the planet set-up. No offence taken George and I know you meant no harm. It's just that = I know from past experience that an off-hand remark about me having = "changed the design of the 2.85" is enough to set off a deluge of calls = from 2.85 drive buyers wanting to know if they have the latest version = and what the changes were. Don't know who suggested it but the basic = design approach, materials, lubrication scheme, etc are the same on all = the drives in current production (RD-1A/B/C). As you said, there are = the obvious differences between fixed planet and fixed ring gear types. If you taking off at 6,200 ( that is low for a 2.85), what is your = cruise? I cruise at 5400 - 5600 RPM. This is an economy cruise setting but = that's what I use unless I'm running out of time, daylight, or weather. = I always choose a prop to target the maximum desired engine rpm at top = speed and let everything else fall where it may. =20 There are a number of oil separators used on motorbikes which are = small and would suit this purpose. I'm on the lookout! I usually end up fabricating something that will = fit the space & shape available. I have several of the excellent RX-8 = oil-air separators but they won't begin to fit. George ( down under) Believe nothing of what you hear and only have of what you see! Unless you can verify it one way or another, Amen! =20 Tracy Where do these stories come from? : ) There has been no change to = the 2.85 (RD-1C) design. My takeoff RPM is around 6200 rpm (limited by = fixed pitch prop) and top speed rpm is 7450 so far. =20 Top speed runs have been limited due to oil mist blowing out of the = crankcase vent at anything above 7000 rpm. Still working on an oil / = air separator needed for air racing. No time for making this and new = prop cuffs so I'll miss the Ohio to Oshkosh race this year. Look = forward to doing it next year in the 20B powered RV-8 which is moving = ahead (finally). I noticed they are separating the formula RV classes = by engine displacement Bwahh Ha Ha Ha! .... : ) Tracy MY PSRU is not dissimilar to Tracy's in regard to using the 2.85 = Ford E4OD Planetary. Just differently configured, but then again I'm led = to believe that Tracy has changed the design for the 2.85. I personally = prefer different bearings. I don't plan on going over 7,500. Someone mentioned to me Tracy didn't exceed 7,200 on take-off, = with the 2.85. I hoping for 115 to 125hp at 7,500 rpm, I think that's achievable! George ( down under) ------=_NextPart_000_00A5_01C57746.92BE2C80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

 
Sorry Tracy,
Someone suggested your 2.85 drive is different = to your=20 2.17 - apart from the obvious and necessary changes to the planet=20 set-up.
 
No offence taken George and I know you = meant no=20 harm.  It's just that I know from past experience that an = off-hand=20 remark about me having "changed the design of the 2.85" is = enough to=20 set off a deluge of calls from 2.85 drive buyers wanting to know if = they have=20 the latest version and what the changes were.  Don't know who = suggested=20 it but the basic design approach, materials, lubrication scheme, etc = are the=20 same on all the drives in current production = (RD-1A/B/C).  As you=20 said, there are the obvious differences between fixed planet and fixed = ring=20 gear types.
 
If you taking off at 6,200 ( that is low for a = 2.85),=20 what is your cruise?
 
I cruise at 5400 - 5600 RPM.  This is = an economy=20 cruise setting but that's what I use unless I'm running out of time, = daylight,=20 or weather.  I always choose a prop to target the maximum desired = engine=20 rpm at top speed and let everything else fall where it may. =20
 
There are a number of oil separators used on = motorbikes=20 which are small and would suit this purpose.
 
I'm on the lookout!  I usually end up=20 fabricating something that will fit the space & shape = available.  I=20 have several of the excellent RX-8 oil-air separators but they won't = begin to=20 fit.
 
George ( down under)
Believe nothing of what you hear and only have = of what=20 you see!
 
Unless you can verify it one = way or=20 another, Amen! 
Tracy
 
Where do these stories come from? =  :=20 )  There has been no change to the 2.85 (RD-1C) design.  = My=20 takeoff RPM is around 6200 rpm (limited by fixed pitch = prop) and top=20 speed rpm is 7450 so far. 
 
Top speed runs have been limited = due to oil=20 mist blowing out of the crankcase vent at anything above 7000 = rpm. =20 Still working on an oil / air separator needed for air racing.  = No time=20 for making this and new prop cuffs so I'll miss the Ohio to Oshkosh = race=20 this year.  Look forward to doing it next year in the 20B = powered RV-8=20 which is moving ahead (finally).  I noticed they are separating = the=20 formula RV classes by engine displacement   Bwahh Ha Ha = Ha!=20 ....  : )
 
Tracy
 
 
 
MY PSRU is not dissimilar to = Tracy's in=20 regard to using the 2.85 Ford E4OD Planetary. Just differently = configured,=20 but then again I'm led to believe that Tracy has changed the = design for=20 the 2.85. I personally prefer different bearings. I don't plan on going over 7,500.
Someone mentioned to me Tracy = didn't exceed=20 7,200 on take-off, with the 2.85.
 
I hoping for 115 to 125hp at = 7,500 rpm, I=20 think that's achievable!
 
George ( down under)
 
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