Return-Path: Received: from [65.54.168.114] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 611657 for flyrotary@lancaironline.net; Tue, 18 Jan 2005 11:51:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.114; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 18 Jan 2005 08:51:04 -0800 Message-ID: Received: from 65.54.98.16 by BAY3-DAV10.phx.gbl with DAV; Tue, 18 Jan 2005 16:50:07 +0000 X-Originating-IP: [65.54.98.16] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Engine mounts Date: Tue, 18 Jan 2005 11:50:04 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_014C_01C4FD53.D99E7550" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Tue, 18 Jan 2005 11:50:04 -0500 X-OriginalArrivalTime: 18 Jan 2005 16:51:04.0315 (UTC) FILETIME=[E5E81CB0:01C4FD7D] This is a multi-part message in MIME format. ------=_NextPart_000_014C_01C4FD53.D99E7550 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I didn't know about the requirement to replace the lower spacers but I = have no technical objections to the S-beam mount other than to pay = careful attention to the rear mount requirements as Jerry pointed out. = I have seen Jerry's work before and if the precision on the new spacers = is as good as I expect, it should be no problem. =20 As he also noted, the arrangement of cooling and exhaust systems will be = greatly affected by your choice of engine mount style. Know what you = are doing before making the choice. (didn't really need to say that did = I?) I would (strongly) not recommend using the redrive adapter plate as the = engine mount. =20 Tracy (still waiting on my 20B right hand offset CCI engine mount) ----- Original Message -----=20 From: Jerry Hey=20 To: Rotary motors in aircraft=20 Sent: Sunday, January 16, 2005 10:21 AM Subject: [FlyRotary] Engine mounts I do build rotary engine mounts as many of you already know. It=20 started out a couple of years ago with the Motor Mount Plate concept. = That was abandoned when Bill Schertz invented the beam mount which is = much better in every way. Lighter, stronger, cheaper. In response to = an inquiry yesterday, I sent the following info, that I would like to=20 share with every one. The question was could I supply an engine = mount=20 for the RV6 tri gear. The short answer is Yes. The engine mount I build is called an S-beam = (Schertz Beam) mount. The concept was first developed by Bill Schertz = and was modified by Paul Lamar and others until it evolved into the=20 present configuration. The S-beam mount only supports the front of = the=20 engine. The rear engine support is provided by a adjustable strut=20 that runs from "someplace" on the back of the engine to "someplace" = on=20 the firewall. The "someplace" varies from plane to plane. For some=20 aircraft, such as the Kiss Cruiser that have a plywood firewall, it = is=20 no problem at all. For others such as the RV, the sheet metal = firewall=20 may have to be reinforced where the strut attaches. I say "may"=20 because it might be possible, in your case, to tie into the nose = gear=20 assembly instead of the fire wall. I do not provide the rear strut as = part of the engine mount package. It is easy to build. Another complication is that the starter has to be relocated from 6=20 o'clock (on Tracy's drive adaptor plate) to some other position such=20 as 3 o'clock. The reason for this is that the S beam blocks the 6=20 o'clock position. If you are planning to put the radiator underneath, = then you probably would want to relocate the starter anyway. If you=20 are thinking of using cheek radiators, then moving the starter to=20 either side may not be a good idea. Each Installation has to be=20 evaluated individually. A third issue is that the S Beam replaces the lower spacers that Tracy = supplies with the drive. I have not asked for nor received=20 permission to do this from Tracy and he may well void the warranty on=20 the drive. If our positions were reversed that is what I would do. = The=20 steel spacers I use with s-beam are precision ground to .5 thousands=20 of an inch tolerance. Relocating the starter requires welding an=20 extension on the drive adaptor plate which I can also do. Once again=20 this has not been authorized by Tracy. If you decide to have me build the engine mount, I will need a=20 physical template of the engine mount attach points on firewall and I=20 will need to know the distance from the firewall to the face of the=20 prop flange on Tracy's drive. The S-beam engine mount was developed to make it easier to put the=20 radiator under the engine and to fit the exhaust system including=20 turbos. The cost, including starter relocation, is $850.00. A fifty per cent=20 deposit is required. The balance can be sent when the engine mount is=20 ready to ship. Normally it takes about one month to build an engine mount. Jerry P.S. I do not build engine mounts Jan and Feb as the shop is too = cold. ------=_NextPart_000_014C_01C4FD53.D99E7550 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I didn't know about the requirement to replace the lower spacers = but I have=20 no technical objections to the S-beam mount other than to pay careful = attention=20 to the rear mount requirements as Jerry pointed out.  I have seen = Jerry's=20 work before and if the precision on the new spacers is as good as I = expect, it=20 should be no problem. 
 
As he also noted, the arrangement of cooling and exhaust systems = will be=20 greatly affected by your choice of engine mount style.  Know what = you are=20 doing before making the choice. (didn't really need to say that did = I?)
 
I would (strongly) not recommend using the redrive = adapter plate=20 as the engine mount. 
 
Tracy  (still waiting on my 20B right hand offset CCI engine=20 mount)
----- Original Message -----
From: Jerry Hey
To: Rotary motors in = aircraft
Sent: Sunday, January 16, 2005 = 10:21=20 AM
Subject: [FlyRotary] Engine = mounts

I do build rotary engine mounts as many of you already=20 know.  It
started out a couple of years ago with the Motor = Mount=20 Plate concept. 
That was abandoned  when Bill Schertz = invented=20 the beam mount which is
much better in every way. Lighter, = stronger,=20 cheaper.   In response to
an inquiry yesterday, I sent = the=20 following info, that I would like to
share with every = one.   The=20 question was could I supply an engine mount
for the RV6 tri=20 gear.



The short answer is Yes.  The engine mount I = build=20 is called an S-beam
(Schertz Beam) mount.  The concept was = first=20 developed by Bill Schertz
and was modified by Paul Lamar and = others until=20 it evolved into the
present configuration.  The S-beam mount = only=20 supports the front of the
engine.  The rear engine support is = provided by a adjustable  strut
that runs  from = "someplace" on=20 the back of the engine to "someplace" on
the firewall.   = The=20 "someplace" varies from plane to plane.  For some
aircraft, = such as=20 the Kiss Cruiser that have a plywood firewall,  it is
no = problem at=20 all.  For others such as the RV, the sheet metal firewall
may = have to=20 be reinforced where the strut attaches.  I say "may"
because = it might=20 be possible, in  your case,  to tie into the nose gear =
assembly=20 instead of the fire wall.  I do not provide the rear strut as =
part of=20 the engine mount package.  It is easy to build.

Another=20 complication is that the starter  has to be relocated from 6 =
o'clock=20 (on Tracy's drive adaptor plate)  to some other position such=20
as  3 o'clock.  The reason for this is that the S beam = blocks=20 the 6
o'clock position.  If you are planning to put the = radiator=20 underneath,
then you probably would want to relocate the starter=20 anyway.  If you
are thinking of using cheek radiators, then = moving=20 the starter to
either side may not be  a good idea. Each = Installation=20 has to be
evaluated individually.

A third issue is that the = S Beam=20 replaces the lower spacers that Tracy
supplies with the = drive.  =20 I have not asked for  nor received
permission to do this from = Tracy=20 and he may well void the warranty on
the drive. If our positions = were=20 reversed that is what I would do.  The
steel  spacers I = use with=20 s-beam are precision ground to .5 thousands
of an inch = tolerance. =20 Relocating the starter requires welding an
extension on the drive = adaptor=20 plate which I can also do.  Once again
this has not been = authorized=20 by Tracy.

If you decide to have me build  the engine = mount, =20 I will need a
physical template of the engine mount attach points = on=20 firewall and I
will need to know the distance from the firewall to = the=20 face of the
prop flange on Tracy's drive.

The S-beam engine = mount=20 was developed to make it easier to put the
radiator under the = engine and=20 to fit the exhaust system including
turbos.

The cost, = including=20 starter relocation, is $850.00.  A fifty per cent
deposit is=20 required. The balance can be sent when the engine mount is
ready = to=20 ship.

Normally it takes about one month to build an engine=20 mount.     Jerry

P.S.  I do not build = engine=20 mounts Jan and Feb as the shop is too=20 cold.

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