X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from alnrmhc11.comcast.net ([204.127.225.91] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1704731 for flyrotary@lancaironline.net; Sat, 23 Dec 2006 16:06:57 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.225.91; envelope-from=n3773@comcast.net Received: from rv8 (c-24-21-141-28.hsd1.or.comcast.net[24.21.141.28]) by comcast.net (alnrmhc11) with SMTP id <20061223210610b1100k2qbbe>; Sat, 23 Dec 2006 21:06:10 +0000 Message-ID: <001a01c726d6$37d8f250$1c8d1518@rv8> Reply-To: "kevin lane" From: "kevin lane" To: "Rotary motors in aircraft" References: Subject: aeromatic prop reply Date: Sat, 23 Dec 2006 13:06:26 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0017_01C72693.278B3130" 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 This is a multi-part message in MIME format. ------=_NextPart_000_0017_01C72693.278B3130 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kevin, The prop has no airspeed limmits on it. A little background. = Circa 1963/65 Univair did the whole ball of wax to certify the Aeromatic = on a Beech 23 with 160 hp Lyc. They did all the vibration testing etc. = They accumlated somewhere between 50 and 100 hours of tests. The FAA = then sent them a letter of approval to go for the STC to put the prop on = those engines. However Univair decided not to go for it because they = felt that there was not enough margain of safety. Consequently they = didn't apply for the STC. Vibration was the issue not any stress = problems. So, my goal is to solve the vibration issue instead of trying = to redesign it so as to make it hell for stout. Since stress is not the = issue then logically solving the vibration will make the two compatible. = Univair used a standard production Aeromatic for their tests and they = almost acheived the goal. So, I am convinced that a little redesign of = the blades will solve the vibration issue. I have built a special test = prop and am going to put it on a Lyc 180hp 0-360 for test runs. I have plenty of hubs. I am able to cover the wood core prop with = carbon fiber, have made several. I am working with a group of = experimenters on a solid carbon fiber blade. The cost is $4250 complete = plus S&H. Where are you located? Kent ----- Original Message -----=20 From: kevin lane=20 To: n77kt@hipster.net=20 Sent: Friday, December 22, 2006 5:41 PM Subject: aeromatic I would like to try an aeromatic on my RV-6A. it seems that you = currently don't approve of the O-320D2J 160hp combination. will your = props handle a 150kt cruise speed? what is their practical top end? I = don't own a hub. do you sell reman ones, or do I need to find one = first? what would this typically cost? is anyone making lighter weight = composite blades? kevin lane n3773@comcast.net ------=_NextPart_000_0017_01C72693.278B3130 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Kevin, The prop has no airspeed limmits = on=20 it.  A little background.  Circa 1963/65 Univair did the whole = ball of=20 wax to certify the Aeromatic on a Beech 23 with 160 hp Lyc.  They = did all=20 the vibration testing etc.  They accumlated somewhere between 50 = and 100=20 hours of tests.  The FAA then sent them a letter of approval to go = for the=20 STC to put the prop on those engines.  However Univair decided not = to go=20 for it because they felt that there was not enough margain of = safety. =20 Consequently they didn't apply for the STC.  Vibration was the = issue not=20 any stress problems.  So, my goal is to solve the vibration issue = instead=20 of trying to redesign it so as to make it hell for stout.  Since = stress is=20 not the issue then logically solving the vibration will make the two=20 compatible.  Univair used a standard production Aeromatic for their = tests=20 and they almost acheived the goal.  So, I am convinced that a = little=20 redesign of the blades will solve the vibration issue.  I have = built a=20 special test prop and am going to put it on a Lyc 180hp 0-360 for test=20 runs.
 
I have plenty of hubs.  I am able = to cover the=20 wood core prop with carbon fiber, have made several.  I am working = with a=20 group of experimenters on a solid carbon fiber blade.  The cost is = $4250=20 complete plus S&H.
 
Where are you located?
 
Kent
----- Original Message -----
From:=20 kevin = lane=20
Sent: Friday, December 22, 2006 = 5:41=20 PM
Subject: aeromatic

I would like to try an aeromatic on = my=20 RV-6A.  it seems that you currently don't approve of the O-320D2J = 160hp=20 combination.  will your props handle a 150kt cruise speed?  = what is=20 their practical top end?  I don't own a hub.  do you sell = reman=20 ones, or do I need to find one first?  what would this typically=20 cost?  is anyone making lighter weight composite = blades?  =20 kevin lane  n3773@comcast.net
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