X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from sccrmhc12.comcast.net ([204.127.202.56] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 910515 for flyrotary@lancaironline.net; Mon, 02 Jan 2006 17:18:55 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.202.56; envelope-from=kenpowell@comcast.net Received: from smailcenter70.comcast.net ([204.127.205.170]) by comcast.net (sccrmhc12) with SMTP id <20060102221806012007krtee>; Mon, 2 Jan 2006 22:18:11 +0000 Received: from [68.51.59.7] by smailcenter70.comcast.net; Mon, 02 Jan 2006 22:18:06 +0000 From: kenpowell@comcast.net To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Single rotor running- Tracy questions Date: Mon, 02 Jan 2006 22:18:06 +0000 Message-Id: <010220062218.288.43B9A69D000CAF7700000120220073436404040A99019F020A05@comcast.net> X-Mailer: AT&T Message Center Version 1 (Aug 4 2005) X-Authenticated-Sender: a2VucG93ZWxsQGNvbWNhc3QubmV0 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_288_1136240286_0" --NextPart_Webmail_9m3u9jl4l_288_1136240286_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Rusty, Can you really build a RV-8 Quickbuild in 9 months while still holding a full time job? When do you sleep!!!! How? (serious question) How many hours do you think it will take? Ken Powell Bryant, Arkansas 501-847-4721 C150 / RV-4 under construction -------------- Original message -------------- From: "Russell Duffy" <13brv3@bellsouth.net> (2nd attempt- first is lost is space) One quick fix is adding a bit of flywheel mass. The race car can idle right down, RPM wise but with no flywheel, it shakes the trans so hard you hear it above the considerable exhaust note. So, the idle is set at 2,200 RPM. Seems real happy there and makes no trans noise. The missing rotor looked like flywheel mass to the system. So removing it raises the RPM where one of the nodes is peaking. The BD-5 article is a must read for all builders, just to get the hair on the back of your neck standing up. Bill and Lynn, Thanks for the pointer to the article. Indeed, it's interesting, and gets your attention. I had wondered if a flywheel of sorts would be needed, but with the high weight of the engine now, I'd hate to add more weight. It would make an interesting test, if I could do it easily though. Perhaps some evenly matched weights could be added at the 4 bolts that hold the flex plate to the drive plate. I'm not sure if you could put enough weight there to really matter though. This will make a really interesting project, and perhaps another good use for the dynamic balancing equipment. It's all going to have to wait until the RV-8 is flying though, because that's my only priority at the moment. My goal is to have it flying by the end of the Summer, so maybe I can get back to the single rotor project then. Cheers, Rusty PS- Tracy, can you send me the dimensions and durometer specs for those dampeners? --NextPart_Webmail_9m3u9jl4l_288_1136240286_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Rusty,

Can you really build a RV-8 Quickbuild in 9 months while still holding a full time job? When do you sleep!!!! How? (serious question) How many hours do you think it will take?

Ken Powell
Bryant, Arkansas
501-847-4721
C150 / RV-4 under construction

-------------- Original message --------------
From: "Russell Duffy" <13brv3@bellsouth.net>

(2nd attempt- first is lost is space)

One quick fix is adding a bit of flywheel mass. The race car can idle right down, RPM wise but with no flywheel, it shakes the trans so hard you hear it above the considerable exhaust note. So, the idle is set at 2,200 RPM. Seems real happy there and makes no trans noise.

The missing rotor looked like flywheel mass to the system. So removing it raises the RPM where one of the nodes is peaking.

The BD-5 article is a must read for all builders, just to get the hair on the back of your neck standing up.

Bill and Lynn,

Thanks for the pointer to the article. Indeed, it's interesting, and gets your attention.

I had wondered if a flywheel of sorts would be needed, but with the high weight of the engine now, I'd hate to add more weight. It would make an interesting test, if I could do it easily though. Perhaps some evenly matched weights could be added at the 4 bolts that hold the flex plate to the drive plate. I'm not sure if you could put enough weight there to really matter though.

This will make a really interesting project, and perhaps another good use for the dynamic balancing equipment. It's all going to have to wait until the RV-8 is flying though, because that's my only priority at the moment. My goal is to have it flying by the end of the Summer, so maybe I can get back to the single rotor project then.

Cheers,

Rusty

PS- Tracy, can you send me the dimensions and durometer specs for those dampeners?

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