Mailing List flyrotary@lancaironline.net Message #26311
From: Leon Promet <leonp@pacific.net.au>
Subject: Re: [FlyRotary] Single rotor exhaust header design??
Date: Sat, 3 Sep 2005 09:08:26 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Single rotor exhaust header design??
Hi Mike,
 
Pic attached of my "extractors" being tacked up (and the EFI mock-up as well).  The primary pipes are about as equal in length as I could get them.  Seem to work well on the car. Engine now has nearly 2,500 km on it,  and pulled 8,000+ RPM several times yesterday on the expressway (but only in the intermediate gears of course). 
 
I can report that the Renesis Single Rotor is going real strong,  and hasn't missed a beat since it was installed.  I made a "flying" round trip (400 Km) to visit my favourite blacksmith at Newcastle and also called in to see a "boatie" mate of mine to discuss "Air Boats". 
 
Will know more about power output of the Rensis 4 port WL once I get the EFI system all hooked up onto Humphrey and do some dyno figures in a couple of weeks or so.  More pix as I do the installation.
 
Cheers,

Leon
----- Original Message -----
From: Wynn, Mike
Sent: Friday, September 02, 2005 8:10 AM
Subject: [FlyRotary] Single rotor exhaust header design??


So a quick question:

If you have a Renesis based single rotor with two exhaust ports each pulsing at the same time, what is the best arrangement for the headers?

The best length for the primary is going to be determined by the rpm - so should be the same as for any other rotary.  But is it best to run two independent pipes and concentrate on minimizing back pressure, or, if you were to make one primary twice the length of the other one and then join into a single pipe perhaps you get some scavenging?


How do traditional `bunch of bananas' headers compare with VAM/tangential in terms of engine performance?


Lynn, Leon ???

Cheers
Mike


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