X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m24.mx.aol.com ([64.12.137.5] verified) by logan.com (CommuniGate Pro SMTP 5.1.11) with ESMTP id 2279670 for flyrotary@lancaironline.net; Thu, 23 Aug 2007 02:47:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.5; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m24.mx.aol.com (mail_out_v38_r9.2.) id q.d60.f4a2239 (42808) for ; Thu, 23 Aug 2007 02:46:52 -0400 (EDT) From: WRJJRS@aol.com Message-ID: Date: Thu, 23 Aug 2007 02:46:52 EDT Subject: Re: [FlyRotary] Re: Engine mounts To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1187851612" X-Mailer: 9.0 SE for Windows sub 5042 X-Spam-Flag: NO -------------------------------1187851612 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit George, I really liked your bellhousing! I believe with a guy like Larry cutting the form CNC yours would be the "way to go!" With a CNC'ed form I don't even think it would weigh more than a pound more. I like it because with simple add ons you could fit almost anything.Much more flexible. That is what you and Butch were after anyway right? An aside, you might look at the way that Mistral is going with the 20B based engine. The bellhousing is tapped and the bed mount is attached in the same position as your pads! The 2 rotor could use the lightest setup possible. The 3 rotor is light enough that a good mount a few pounds heavier wouldn't make any difference to me at all. I think you were going the right direction. Bill Jepson (But then you knew that already didn't you George?) That's why I designed a bellhousing ( with Butch) with side pads for engine mounts. George (down under) Robert, Funny you should ask. I have been working on this problem for a while. Those devils at Mazda seem to have conspired to make the Renesis very hard to design a mount for. They took away the point for a mount on top of the engine. They moved the engine mount bolts all over the place and put a lot of exhaust and plumbing in the way . It was as if they sat down and said....how can we make this engine really really hard to instal in an airplane. I would have to agree with Lynn on this one. I am going to use the plate option. I will be modifying it so that it is lower profile. The plate will be the size of the engine pan and the bolts will go in from the side. The standard conical mounts will be on the sides as close to the engine as I can get them. Imagine a hybrid between a bed mount and a P51 beam mount. It is a difficult problem if you have a tight cowl. Don't rely on the engine mount to help you if you loose a prop blade!! Put at least a 3/16 safety cable on the engine. There are some design suggestions here: Monty ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour -------------------------------1187851612 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
George, I really liked your bellhousing! I believe with a guy like Larr= y=20 cutting the form CNC yours would be the "way to go!"  With a CNC'ed for= m I=20 don't even think it would weigh more than a pound more. I like it because wi= th=20 simple add ons you could fit almost anything.Much more flexible. That is wha= t=20 you and Butch were after anyway right?  An aside, you might look at the= way=20 that Mistral is going with the 20B based engine. The bellhousing is tapped a= nd=20 the bed mount is attached in the same position as your pads! The 2 rotor cou= ld=20 use the lightest setup possible. The 3 rotor is light enough that a good mou= nt a=20 few pounds heavier wouldn't make any difference to me at all. I think you we= re=20 going the right direction.
 
Bill Jepson (But then you knew that already didn't you George?)
 
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
That's why I designed a bellhousing ( wit= h Butch)=20 with side pads for engine mounts.
George (down under)
Robert,
 
Funny you should ask. I have been worki= ng on=20 this problem for a while. Those devils at Mazda seem to have conspi= red=20 to make the Renesis very hard to design a mount for. They took away the=20 point for a mount on top of the engine. They moved the engine=20 mount bolts all over the place and put a lot of exhaust and plumbin= g in=20 the way . It was as if they sat down and said....how can we make this en= gine=20 really really hard to instal in an airplane.
 
I would have to agree with Lynn on this= one. I=20 am going to use the plate option. I will be modifying it so that it= is=20 lower profile. The plate will be the size of the engine pan and the bolt= s=20 will go in from the side. The standard conical mounts will be on the sid= es=20 as close to the engine as I can get them. Imagine a hybrid between a bed= =20 mount and a P51 beam mount.
 
It is a difficult problem if you h= ave a=20 tight cowl.
 
Don't rely on the engine mount to help=20= you if=20 you loose a prop blade!!
 
Put at least a 3/16 safety cable o= n the=20 engine.  
 
There are some design suggestions=20 here:
 
Monty
 



Get a sneak pe= ek of the all-new AOL.com.
<= /BODY> -------------------------------1187851612--