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George, here was my idea of a muffler using cones. The center (smaller) tube is perforated with the cone attached to it. Room at the widest part of the cone and wall of outer tube for gas to pass. A variation was to have the cone extend to the outer tube wall and have all cones facing the header end of the muffler only permitting gas (and sound) through the perforated center tube.
Ed
----- Original Message ----- From: "george lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, May 02, 2006 7:42 PM
Subject: [FlyRotary] Re: new hangar
Ed,
My sentiments exactly - they will soon look a bit worse for wear.
I can obviously source them from here but you will be better served if you
can source them locally - some of ours may in fact come from the US.
If you give me a size I will get you a price, what I find the most expensive
is the cost of postage to the USA.
Bob may also have the answer! If he has a contact perhaps you could get them
made out of 321SS
George
How about a source for the more reasonable priced cones, George. I
obviously don't care about the finish since they will go inside - just the
material and cost. Thanks
Ed
----- Original Message -----
From: "george lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, May 02, 2006 12:11 AM
Subject: [FlyRotary] Re: new hangar
> Ed,
> That's way too dear, you should be able to get them for about $10 US > ea.
I
> must admit I had to shop around as well. The ones I ended up with
weren't
> as
> perfectly finished as the expensive one but the same material 316SS.
> Our design has an inner cooling tube and an outer cooling tube and heat
> shield, all the ends are cones as well!
> All I have to do is get my welder to finish it.
> George
>
> George ( down under)
>
>> 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
>>
>> ----- Original Message -----
>> From: "george lendich" <lendich@optusnet.com.au>
>> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>> Sent: Monday, May 01, 2006 7:48 PM
>> Subject: [FlyRotary] Re: new hangar
>>
>>
>> >
>> >> 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)
>> >
>> >
>> > --
>> > Homepage: http://www.flyrotary.com/
>> > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
>> >
>>
>>
>>
>> --
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>
>
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