X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.25.9.100] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1694314 for flyrotary@lancaironline.net; Wed, 20 Dec 2006 08:38:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-100-190.carolina.res.rr.com [24.74.100.190]) by ms-smtp-01.southeast.rr.com (8.13.6/8.13.6) with SMTP id kBKDbNCP025324 for ; Wed, 20 Dec 2006 08:37:23 -0500 (EST) Message-ID: <003101c7243c$02fd7070$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: hydraulic constant speed prop for rotarys Date: Wed, 20 Dec 2006 08:37:36 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01C72412.19D1A750" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_002E_01C72412.19D1A750 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hey, Bill, I think it would be great if a light weight relatively = inexpensive way could be found of providing the required hydraulic = pressure and speed control (adapting a lycoming governor is one way). = It wouldn't hurt my heavy RV-6A getting up quickly out of short grass = strips either. I think had there been a large demand for Tracy's gear box to have the = provisions for it, it probably would have been incorporated in the = design - but the old chicken and egg situation. Perhaps the one that Lou referred to may be the answer as its hydraulic = control is apparently internal to the prop hub - if I understood = correctly. Wonder how much it weighs? Ed ----- Original Message -----=20 From: WRJJRS@aol.com=20 To: Rotary motors in aircraft=20 Sent: Wednesday, December 20, 2006 12:19 AM Subject: [FlyRotary] Re: hydraulic constant speed prop for rotarys In a message dated 12/19/2006 10:53:12 AM Pacific Standard Time, = eanderson@carolina.rr.com writes: Guess I did, Bill. I know the governor has the pump to do this, its = just I've not found a governor suitable for a rotary engine. OK Ed, I kind of figured you understood about the pump in the governor. As to = the speed, I figured that the governor would require a reduction = identical (or really close) to the PSRU. This could be a toothed = belt/pulley system. With the reduction any standard governor would work. = Mistral uses a helical right angle drive to a pad on the side of the = prop shaft. I've also seen a v-belt driving off a pulley at the front = similar to the O-360 Lyc alternator drive. Some movement is OK it = needn't be timed. The reason I'm interested is the RV-10 will probably = benefit from a CS. As you mentioned the RV-4 hardly needs a CS. Just more complication. = I am supprised Tracy didn't think about the other planes that would or = could be using the drive when going into production though. Bill Jepson ------=_NextPart_000_002E_01C72412.19D1A750 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hey, Bill,  I think it would be great if a = light weight=20 relatively inexpensive way could be found of providing the required = hydraulic=20 pressure and speed control (adapting a lycoming governor is one = way).  It=20 wouldn't hurt my heavy RV-6A getting up quickly out of short grass = strips=20 either.
 
I think had there been a large demand for Tracy's = gear box to=20 have the provisions for it, it probably would have been incorporated in = the=20 design - but the old chicken and egg situation.
 
Perhaps the one that Lou referred to may be the = answer as its=20 hydraulic control is apparently internal to the prop hub - if I = understood=20 correctly.  Wonder how much it weighs?
 
Ed
----- Original Message -----
From:=20 WRJJRS@aol.com
Sent: Wednesday, December 20, = 2006 12:19=20 AM
Subject: [FlyRotary] Re: = hydraulic=20 constant speed prop for rotarys

In a message dated 12/19/2006 10:53:12 AM Pacific Standard Time, = eanderson@carolina.rr.com=20 writes:
Guess I did, Bill.  I know the = governor has the=20 pump to do this, its just I've not found a governor suitable for a = rotary=20 engine.
OK Ed,
I kind of figured you understood about the pump in the governor. = As to=20 the speed, I figured that the governor would require a reduction = identical (or=20 really close) to the PSRU. This could be a toothed belt/pulley system. = With=20 the reduction any standard governor would work. Mistral uses a helical = right=20 angle drive to a pad on the side of the prop shaft. I've also seen a = v-belt=20 driving off a pulley at the front similar to the O-360 Lyc alternator = drive.=20 Some movement is OK it needn't be timed. The reason I'm interested is = the=20 RV-10 will probably benefit from a CS.
 As you mentioned the RV-4 hardly needs a CS. Just more=20 complication. I am supprised Tracy didn't think about the other planes = that=20 would or could be using the drive when going into production = though.
Bill Jepson 
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