X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail17.syd.optusnet.com.au ([211.29.132.198] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 912842 for flyrotary@lancaironline.net; Sun, 24 Apr 2005 04:21:27 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.198; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-169-116.dsl.nsw.optusnet.com.au [211.31.169.116]) by mail17.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j3O8KaPG003941 for ; Sun, 24 Apr 2005 18:20:38 +1000 Message-ID: <000b01c548a7$0b386230$74a91fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Apex Slot Wear/ Grinding for 3mm Seals Date: Sun, 24 Apr 2005 18:24:32 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C548FA.DC91E560" 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_0008_01C548FA.DC91E560 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kelly, It's debatable that there is a hardened layer! George ( down under) Lynn, Ken Welter reported accelerated slot wear after machining his = rotors for 3 mm seals.......Granted Ken is pulling about 300 hp for takeoff = using nitrus oxide........It was mentioned that the hardened layer at the = rotor=20 tips was lost due to grinding for the 3mm seals........Do you know = what hardening process is used (induction, etc) and whether it could be=20 restored........Your take on this please Lynn or anyone !! -- Kelly Troyer=20 Dyke Delta/13B/RD1C/EC2=20 -------------- Original message from Lehanover@aol.com: = --------------=20 > In a message dated 04/23/2005 09:02 Central Daylight Time,=20 > canarder@frontiernet.net writes:=20 >=20 > What I seem to have missed is the compelling reason=20 > why we can't simply mill the slots out to 3 mm, install new seals = and=20 > continue the march.=20 >=20 >=20 > This is a common repair on 2MM rotors.=20 >=20 >=20 > Lynn E. Hanover=20 ------=_NextPart_000_0008_01C548FA.DC91E560 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Kelly,
It's debatable that there is a hardened = layer!
George ( down under)
Lynn,
   Ken Welter reported accelerated slot wear after = machining=20 his rotors
for 3 mm seals.......Granted Ken is pulling about 300 hp for = takeoff=20 using
nitrus oxide........It was mentioned that the hardened layer at = the rotor=20
tips was lost due to grinding for the 3mm seals........Do you =  know=20 what
hardening process is used (induction, etc) and whether it could = be
restored........Your take on this please Lynn or anyone !!
--
Kelly Troyer
Dyke=20 Delta/13B/RD1C/EC2
--------------=20 Original message from Lehanover@aol.com: -------------- =


> In=20 a message dated 04/23/2005 09:02 Central Daylight Time,
>=20 canarder@frontiernet.net writes:
>
> What I seem to = have=20 missed is the compelling reason
> why we can't simply mill = the slots=20 out to 3 mm, install new seals and
> continue the march. =
>=20
>
> This is a common repair on 2MM rotors.
> =
>=20
> Lynn E. Hanover
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