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X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail21.syd.optusnet.com.au ([211.29.133.158] verified) by logan.com (CommuniGate Pro SMTP 5.0c4) with ESMTPS id 760092 for flyrotary@lancaironline.net; Mon, 10 Oct 2005 00:31:21 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.158; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-234-155.dsl.nsw.optusnet.com.au [220.236.234.155]) by mail21.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j9A4UVZN018575 for ; Mon, 10 Oct 2005 14:30:33 +1000 Message-ID: <001e01c5cd53$bee6e5f0$9beaecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Viva la Difference in Conterweights... Date: Mon, 10 Oct 2005 14:33:20 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001B_01C5CDA7.8FD57250" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_001B_01C5CDA7.8FD57250 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, Good work! Personally I would like to see both the front and rear CW for all series = - just out of curiosity. It may give some indication as to why things are different. A really excellent source would be the complete series of Rotors, their = weights and counter weights. George (down under) I measure the thickness of the weight at 1.024" on the Series 4, and = 0.920" on the S5 counterweight. Can anyone verify these dimensions? Rusty?=20 Good timing Dave. I looked at the hanger for the S4 counterweight the = other day, and couldn't find it. Next, I looked in the junk parts box = in the attic, nope. Finally, while I was messing with the single rotor = today, I noticed a pile of parts that I had out when I was building the = single. Sure enough, it was in that pile. =20 So, attached are a couple pics. My measurements are just a bit = different from yours, but you're correct on which one is which. I = annotated the measurements and weights on the first pic. The S4 also = has an odd milled area near the hub, which is visible on the second pic. = I'm thinking these may be cast, then either drilled or milled as needed = to have the correct stock balance for that series counterweight. Just a = guess though.=20 My other dilemma is my rear counterweight - I don't know which one I = have. Assuming Mazda used a similar method to change the weight on the = rear end there may be a measurable difference there as well. Mine measures 0.550. I am hoping it is for a series 5 rotor. Anyone = have one around that they can measure? You're one your own there, because I don't have one anywhere. It = would sure be nice to be able to document the difference though. =20 Do you have your engine off, and torn down? I'm dying to know what = you find. =20 Rusty (single rotor stuff to follow) -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_001B_01C5CDA7.8FD57250 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

Rusty,

Good work!

Personally I would like to see both the = front and=20 rear CW for all series - just out of curiosity.

It may give some indication as to why = things are=20 different.

A really excellent source would be the = complete=20 series of Rotors, their weights and counter weights.

George (down under)

I measure the thickness of the weight at 1.024" on the = Series=20 4, and 0.920" on the S5 counterweight.

Can anyone verify these dimensions? Rusty?

Good timing=20 Dave. I looked at the hanger for the S4 counterweight the other = day, and=20 couldn't find it. Next, I looked in the junk parts box in the = attic,=20 nope. Finally, while I was messing with the single = rotor=20 today, I noticed a pile of parts that I had out when I was = building the=20 single. Sure enough, it was in that=20 pile.

So,=20 attached are a couple pics. My measurements are just a bit=20 different from yours, but you're correct on which one is which. =20 I annotated the measurements and weights on the first pic. =20 The S4 also has an odd milled area near the hub, which is visible = on the=20 second pic. I'm thinking these may be cast, then either drilled = or=20 milled as needed to have the correct stock balance for that = series=20 counterweight. Just a guess = though.

My other dilemma is my rear counterweight - I don't know which = one I=20 have. Assuming Mazda used a similar method to change the weight = on the=20 rear end there may be a measurable difference there as well.

Mine measures 0.550. I am hoping it is for a series 5 = rotor. =20 Anyone have one around that they can measure?

You're one=20 your own there, because I don't have one anywhere. It would sure = be nice=20 to be able to document the difference = though.

Do you have=20 your engine off, and torn down? I'm dying to know what you=20 find.

Rusty=20 (single rotor stuff to follow)

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Homepage: http://www.flyrotary.com/
Archive and=20 UnSub: =20 http://mail.lancaironline.net/lists/flyrotary/
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