X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.8.74.12] (HELO mail.hansoninfosys.com) by logan.com (CommuniGate Pro SMTP 5.0.8) with SMTP id 973568 for flyrotary@lancaironline.net; Tue, 07 Feb 2006 12:21:20 -0500 Received-SPF: none receiver=logan.com; client-ip=216.8.74.12; envelope-from=dvanwinkle@royell.net Received: (qmail 26087 invoked by uid 89); 7 Feb 2006 17:20:32 -0000 Received: from unknown (HELO sempron3000) (216.8.89.122) by 0 with SMTP; 7 Feb 2006 17:20:32 -0000 Message-ID: <008401c62c0a$cd3ba0d0$800010ac@sempron3000> From: "Dean Van Winkle" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Single rotor smooth as silk now Date: Tue, 7 Feb 2006 11:20:26 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0081_01C62BD8.7E751350" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0081_01C62BD8.7E751350 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: Lehanover@aol.com=20 To: Rotary motors in aircraft=20 Sent: Tuesday, February 07, 2006 7:11 AM Subject: [FlyRotary] Re: Single rotor smooth as silk now In a message dated 2/7/2006 3:25:58 AM Eastern Standard Time, = bobperk@bellsouth.net writes: Didn't Molt Taylor develop a clutch system that that used waffled = disk and steel shot to transfer torque without transmitting the pulses = to the prop? I think I remember him demonstrating it at Oshkosh back in = 81, but I've sleep several places since then.}:>). You might be able to = adapt something like that to drive the RD-1. Bob Perkinson Hendersonville, TN. RV9 N658RP Reserved If nothing changes Nothing changes =20 Same as the problem in the BD-5. Solved with rubber doughnuts in the = driveline. The soft solution. Lynn E. Hanover Bob and Lynn Molt's driveline clutch system was based on the Dodge Corp clutch = design that was used for softly engaging the spin cycle on unknown = thousands of washing machines years ago ( I had one ). The housing = halves had small radial bumps inside near the outer diameter. When the = spin cycle solenoid tightened the belt to the clutch housing, the = housing was spun up, thus throwing the small steel shot to the outer = diameter and wedging them around the waffle plate which in turn drove = the tub. Molt used this same principle to solve his driveshaft breakage = problems on the Aerocar and later on his Imp and Mini-Imp. The amount = of shot installed in the clutch was tailored to drive the prop shaft at = the same RPM as the engine, but would effectively cut off excess torque = excursions by slippage as the engine accelerated through it's torsional = resonance points. Molt stated in forums years ago that he had = encountered instances of being unable to accelerate through engine = torsional resonance points and had fractured sizeable solid steel = driveshafts in the process prior to going to the clutch. I won't = speculate whether this clutch approach has any practical approach to the = single rotor, which already has somewhat of a weight problem. Dean Van Winkle RV-9A Fuselage/Finish/13B Engine ------=_NextPart_000_0081_01C62BD8.7E751350 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
From:=20 Lehanover@aol.com
Sent: Tuesday, February 07, = 2006 7:11=20 AM
Subject: [FlyRotary] Re: Single = rotor=20 smooth as silk now

In a message dated 2/7/2006 3:25:58 AM Eastern Standard Time, bobperk@bellsouth.net = writes:
Didn't=20 Molt Taylor develop a clutch system that that used waffled disk = and=20 steel shot to transfer torque without transmitting the pulses to the = prop?  I think I remember him demonstrating it at Oshkosh back = in 81,=20 but I've sleep several places since then.}:>).  You might be = able to=20 adapt something like that to drive the RD-1.

Bob Perkinson
Hendersonville, TN.
RV9 N658RP = Reserved
If nothing changes
Nothing=20 changes
 

 
Same as the problem in the BD-5. Solved with rubber doughnuts in = the=20 driveline.
 
The soft solution.
 
Lynn E. Hanover
 
Bob and Lynn
 
Molt's driveline clutch system was based on the Dodge Corp clutch = design=20 that was used for softly engaging the spin cycle on unknown = thousands of=20 washing machines years ago ( I had one ).  The housing halves had = small=20 radial bumps inside near the outer diameter. When the spin cycle = solenoid=20 tightened the belt to the clutch housing, the housing was spun = up, thus=20 throwing the small steel shot to the outer diameter and wedging them = around=20 the waffle plate which in turn drove the tub.  Molt used this = same=20 principle to solve his driveshaft breakage problems on the Aerocar and = later=20 on his Imp and Mini-Imp.  The amount of shot installed in the=20 clutch was tailored to drive the prop shaft at the same RPM as = the=20 engine, but would effectively cut off excess torque excursions by = slippage as the engine accelerated through it's torsional resonance=20 points.  Molt stated in forums years ago that he had encountered=20 instances of being unable to accelerate through engine torsional = resonance=20 points and had fractured sizeable solid steel driveshafts in the = process prior=20 to going to the clutch.  I won't speculate whether this clutch = approach=20 has any practical approach to the single rotor, which already has = somewhat of=20 a weight problem.
 
Dean Van Winkle
RV-9A Fuselage/Finish/13B = Engine
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