Just obey the rules for pressure vessels. No flat surfaces. Round or oval with slightly concave or convex end caps.  Two layers of .015" stainless with a 3/8" spacer between. Can be tubing or bent up end flaps. Works fine for insulating exhaust from intake. Engine likes exhaust runners straight out from port for as long a run possible before the first bend. About 2" to 2 1/8" ID. Stainless. Carbon steel will fail eventually. Exactly the same length for each header. About 30"to 36" to the collector. Same for intake runners. Same size as port face ID. As long a straight run as is possible after last bend. So if possible a long taper from bell mouth down to port opening. You can Siamese the runners and just have two intake runners to deal with. You want the highest possible velocity at the port face. 245 HP Drumond 12A use a nearly stock intake manifold gasket.

Very small runners at the port face.  

 

Lynn E. Hanover 

 

Mine was over the exhaust but I found that a radiant shield was enough.  I've used thin stainless steel  (.007") or aluminum over a thin layer of un epoxied fiberglass on the bottom of the plenum was enough protection.  

It's the straight runners to the plenum that make it easy to build.  

Tracy

Sent from my iPad

On Jun 14, 2016, at 12:38, William Jepson <flyrotary@lancaironline.net> wrote:

Something to remember an airbox like that must be on the "cold side" of the engine. Don't put it over the exhaust. 

Bill

On Tue, Jun 14, 2016 at 10:13 AM, Luciano, Luis I CIV PEOSUB, PMS404P <flyrotary@lancaironline.net> wrote:

Hahaha... I always heard of Tracy's simple intake manifold but never had seen the actual setup (except for zoomed out shots in Contact mag).  Now I feel better as I move forward with my build :)  Thanks for sharing Charlie!!!

Luis

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Tuesday, June 14, 2016 12:27 PM
To: Rotary motors in aircraft
Subject: [Non-DoD Source] [FlyRotary] Re: Mistral

On 6/14/2016 9:52 AM, Tom Mann wrote:
> Any Idea as to where one might find this information?
>
> -----Original Message----- From: Charlie England
> Sent: Tuesday, June 14, 2016 9:43 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Mistral
>
> It's not that hard to make an intake that will make great power. Look
> at Tracy's setup. Might not be aesthetically beautiful to some eyes,
> but to me, function is beauty. I don't know of any N/A 2 rotor that's
> as fast as his -4, or as efficient at lower speeds. And really simple to make.
>
> Charlie

Hope Tracy doesn't mind; here's a shot of the Renesis manifold. I believe that the tubes inside the 'box' were later extended to be near the opposite wall. IIRC, Tracy said that the tubes are ~11" from the face of the block to the end of the bellmouth.

You can see old versions of the RWS website by using the Wayback Machine & picking a date.

Charlie

=