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From: "Bob Perkinson" <bobperk@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: new hangar
Date: Tue, 2 May 2006 06:26:05 -0500
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Ed,
What would be the dimensions of the cones if someone were to make them?

Bob Perkinson
Hendersonville, TN.
RV9 N658RP Reserved
If nothing changes
Nothing changes


Sounds like the right formula, George - will wait for your project's outcome
before I try cones.  Yes, I did find some cone  inserts at $60.00 USD each.
I would need 4 for my two tubes - hummm makes one tube sound better all the
time.

Ed

>
>> Just the shells, TJ, the 1/8" thick SS washers are history.  I have
>> concluded that no reasonable thickness of metal will stand up to the
> exhaust
>> pulse for long if it is perpendicular to the shock wave.  I believe that
> if
>> I could shape them into cones where by the shock wave would hit the side
> of
>> the cone  at an oblique angle  would probably survive - now all I have to
> do
>> is find some {:>).
>>
>> Ed
>
> Ed,
> There plenty of SS cones available in 1.6mm, I'm using them in my exhaust
> which is a joint venture design with Bill Jepson - the idea is to redirect
> the shock waves but not restrict the exhaust, as you have alluded to.
> George ( down under)