X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4367474 for flyrotary@lancaironline.net; Wed, 23 Jun 2010 00:31:45 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao107.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100623043106.RAAW1969.fed1rmmtao107.cox.net@fed1rmimpo03.cox.net> for ; Wed, 23 Jun 2010 00:31:06 -0400 Received: from willsPC ([174.66.165.141]) by fed1rmimpo03.cox.net with bizsmtp id ZGX51e00A33Mw6604GX5jX; Wed, 23 Jun 2010 00:31:05 -0400 X-VR-Score: -100.00 X-Authority-Analysis: v=1.1 cv=jnXjG67zpegHetLdXFLOwSrCW9tR7TOSgeoK64kmV7w= c=1 sm=1 a=mI6YO6ZdSLUA:10 a=YndN1mfUGc/ekvXaxFpSiw==:17 a=zfIKNwKeAAAA:8 a=N8B9JuSIAAAA:8 a=o2QoyYduAAAA:8 a=7g1VtSJxAAAA:8 a=Ia-xEzejAAAA:8 a=7iR24LJzvEgUOf6x6hUA:9 a=qC3Ciy7GjsxEghIHqJ8A:7 a=UyFtyCL_HtcqTVdJU1zV-z5HYdAA:4 a=wPNLvfGTeEIA:10 a=Qa1je4BO31QA:10 a=TlnOPt13aEMA:10 a=pGLkceISAAAA:8 a=v086V976eaegKSL7gSwA:9 a=NfeTY1Hjl221xQFfIaIA:7 a=ao6WMO3tWS4CQ5rbeINP9T5BWJwA:4 a=MSl-tDqOz04A:10 a=EzXvWhQp4_cA:10 a=YndN1mfUGc/ekvXaxFpSiw==:117 X-CM-Score: 0.00 Message-ID: <3A5DE2FAA51C4570B89CDA0B536DF634@willsPC> From: "Mike Wills" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: RV question Date: Tue, 22 Jun 2010 21:31:06 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0131_01CB1252.39630500" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 This is a multi-part message in MIME format. ------=_NextPart_000_0131_01CB1252.39630500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Joe, What Dave said. I did my first few flights with stock gear. Didn't find = the gear "too springy" but had intermittent problems with severe shimmy = on rollout. I added hardwood stiffeners to the trailing edges of the = gear legs. Stiffeners were bonded to the legs with epoxy after curing I = wrapped the legs with 3" wide glass tape (spiral wrapped) saturated = with epoxy. Gear is now noticeably stiffer and no more shimmy. My = previous airplane, an RV-6A, didn't have stiffeners and only = occasionally had shimmy issues. In a lot of RVs the shimmy can be cured = simply by running low air pressure in the tires. Have your buddy go to the RV-list at www.matronics.com and use the = search engine to look at landing gear shimmy. Mike Wills From: David Leonard=20 Sent: Tuesday, June 22, 2010 4:01 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: RV question Joe, your friend should talk to some RV guys. We are everywhere. Lots of = info about gear legs in some of the archives of the rv matronics list, = the rv forum, and on vans website. =20 most 4 and 6 gear legs are wrapped with wood and fiberglass = (instructions in the plans), but it is not for springiness, but shimmy = while taxiing. The 4/6 gear legs are a little springy, but not excess. = If he really thinks it was excessive, there could be something wrong = with some part of the system (like the engine mount). Otherwise, it = could be unfamiliarity with the aircraft... not difficult, but = significantly different from a c172. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Tue, Jun 22, 2010 at 3:06 PM, josrph berki = wrote: My friend just made first flight in a RV4 with a Lycoming. He said = that the main gear is too springy and he had wrapped it with fiberglass. Do you stiffen the gear with wraps of carbon fiber? what kind of resin? Other solutions? He said it bounces a lot on landing Joe Berki Limo Ez -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0131_01CB1252.39630500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Joe,
 
What Dave said. I did my first few flights = with stock=20 gear. Didn=92t find the gear "too springy" but had intermittent problems = with=20 severe shimmy on rollout. I added hardwood stiffeners to the trailing = edges of=20 the gear legs. Stiffeners were bonded to the legs with epoxy after = curing I=20 wrapped the legs with 3" wide  glass tape (spiral wrapped) = saturated with=20 epoxy. Gear is now noticeably stiffer and no more shimmy. My previous = airplane,=20 an RV-6A, didn=92t have stiffeners and only occasionally had shimmy = issues. In a=20 lot of RVs the shimmy can be cured simply by running low air pressure in = the=20 tires.
 
Have your buddy go to the RV-list at www.matronics.com and use the = search engine=20 to look at landing gear shimmy.
 
Mike Wills

Sent: Tuesday, June 22, 2010 4:01 PM
Subject: [FlyRotary] Re: RV question

Joe,
your friend should talk to some RV guys.  We are = everywhere. =20 Lots of info about gear legs in some of the archives of the rv matronics = list,=20 the rv forum, and on vans website. 
 
most 4 and 6 gear legs are wrapped with wood and fiberglass = (instructions=20 in the plans), but it is not for springiness, but shimmy while=20 taxiing.   The 4/6 gear legs are a little springy, but not=20 excess.  If he really thinks it was excessive, there could be = something=20 wrong with some part of the system (like the engine mount).  = Otherwise, it=20 could be unfamiliarity with the aircraft...  not difficult, but=20 significantly different from a c172.
 
--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.nethttp://RotaryRoster.net


<= /DIV>
On Tue, Jun 22, 2010 at 3:06 PM, josrph berki = <jskmberki@windstream.net>= =20 wrote:
My friend just made first flight in a RV4 with a = Lycoming.=20  He said that the
main gear is too springy and he had wrapped = it with=20 fiberglass.

Do you stiffen the gear with wraps of carbon=20 fiber?

what kind of resin?  Other solutions?

He = said it=20 bounces a lot on landing

Joe Berki
Limo Ez


--
Homepage:  http://www.flyrotary.com/
Archive and UnSub: =   http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l


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