X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail35.syd.optusnet.com.au ([211.29.133.51] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTPS id 2376096 for flyrotary@lancaironline.net; Mon, 08 Oct 2007 18:16:46 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.51; envelope-from=lendich@optusnet.com.au Received: from george (d220-237-238-253.dsl.nsw.optusnet.com.au [220.237.238.253]) by mail35.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id l98MFxK2002408 for ; Tue, 9 Oct 2007 08:16:00 +1000 Message-ID: <004601c809f8$cfe59c50$fdeeeddc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Mazda video on how to make a rotary.... Date: Tue, 9 Oct 2007 08:16:01 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0043_01C80A4C.A0DA1C20" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0043_01C80A4C.A0DA1C20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kelly, If it's hardened by localized heat then it's probably 1045 ( .45 carbon = steel). The underlying steel would be still hard to some depth similar = to the e-shaft. So the surface would not be as hard but as we are only = taking .5mm off each side, there would still be plenty of toughness in = the underlying material. Coupled with the fact that there has been no reported detriment to other = rotors cut to 3mm in turbo applications, would confirm my suspicions = that there is nothing to worry about. George ( down under) Would be interesting to know the thickness of this hardening........I = wonder=20 if grinding of the apex seal slots for 3 mm seals removes the hardened = layer ?? -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from "Ed Anderson" = : --------------=20 > When my engine swallowed and apex seal, a piece of it flew back = and got=20 > squished by the next apex seal area and actually caused a corner = of the=20 > rotor to crack. So it appeared to be harder than the rest of the = rotor=20 > which was soft enough for the metal to smear. Interesting videos = for sure,=20 > thanks for sharing, Marc=20 >=20 > Ed=20 > ----- Original Message -----=20 > From: "Marc Wiese"=20 > To: "Rotary motors in aircraft"=20 > Sent: Sunday, October 07, 2007 9:48 PM=20 > Subject: [FlyRotary] Mazda video on how to make a rotary....=20 >=20 >=20 > http://www.mazda.com/mazdaspirit/rotary/howto/index.html=20 >=20 > Interesting. I never heard about the hig h frequency RF hardening = of the apex=20 > seal slot area before.....!=20 > Marc Wiese=20 > = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =20 > Fellow RE enthusiast.=20 >=20 > Mazda Japan has released a very interesting set of small videos = that detail=20 > how it creates and builds its Rotary Engines.=20 >=20 >=20 >=20 > http://rotarynews.com/node/view/950=20 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Free Edition.=20 Version: 7.5.488 / Virus Database: 269.14.4/1056 - Release Date: = 7/10/2007 6:12 PM ------=_NextPart_000_0043_01C80A4C.A0DA1C20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Kelly,
If it's hardened by localized heat then = it's=20 probably 1045 ( .45 carbon steel). The underlying steel would be still = hard to=20 some depth similar to the e-shaft. So the surface would not be as hard = but as we=20 are only taking .5mm off each side, there would still be plenty of = toughness in=20 the underlying material.
Coupled with the fact that there has = been no=20 reported detriment to other rotors cut to 3mm in turbo applications, = would=20 confirm my suspicions that there is nothing to worry about.
George ( down under)
 Would be interesting to know the thickness of this=20 hardening........I wonder
if grinding of the apex seal slots for 3 mm seals removes the = hardened=20 layer ??
--
Kelly Troyer
"Dyke = Delta"_13B=20 ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil = Manifold=20




--------------=20 Original message from "Ed Anderson" <eanderson@carolina.rr.com&g= t;:=20 --------------


> When my engine swallowed and apex = seal, a=20 piece of it flew back and got
> squished by the next apex = seal area=20 and actually caused a corner of the
> rotor to crack. So it = appeared=20 to be harder than the rest of the rotor
> which was soft = enough for=20 the metal to smear. Interesting videos for sure,
> thanks for = sharing, Marc
>
> Ed
> ----- Original Message = -----=20
> From: "Marc Wiese"
> To: = "Rotary=20 motors in aircraft"
> Sent: = Sunday,=20 October 07, 2007 9:48 PM
> Subject: [FlyRotary] Mazda video = on how to=20 make a rotary....
>
>
>=20 http://www.mazda.com/mazdaspirit/rotary/howto/index.html
> =
>=20 Interesting. I never heard about the hig h frequency RF hardening of = the=20 apex
> seal slot area before.....!
> Marc Wiese =
>=20 = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> Fellow RE=20 enthusiast.
>
> Mazda Japan has released a very = interesting=20 set of small videos that detail
> how it creates and builds = its=20 Rotary Engines.
>
>
>
>=20 http://rotarynews.com/node/view/950

No virus found in this incoming message.
Checked by AVG Free = Edition.
Version: 7.5.488 / Virus Database: 269.14.4/1056 - = Release Date:=20 7/10/2007 6:12 PM
------=_NextPart_000_0043_01C80A4C.A0DA1C20--