| Joe, there may indeed be a significant hp hit using the tangential. However, I tried to make it totally free flowing without any back pressure at all. I hope that will help. Of course This is a long way from saying it scavenges. I don't think it will.
On the other hand there is a significant drag and weight penalty with hanging a spintech out in the air. Trying to fit everything inside a cowl, forces compromises we would never consider otherwise. At this time it is an experiment that needs to be tested in the real world. We will soon know a lot more when Bob fires up his engine.
If the tangential passes the sound test, then we can make a couple of tuned straight pipes to run on the same engine and quantify the effect on HP. I suppose we could even hang a spintech on it. How much messing around can you stand, Bob? Jerry
On Sep 8, 2005, at 3:08 PM, Joe Hull wrote: After something Lynn Hanover said a while back I’m not sure the Tangential muffler would be a good intermediary to another muffler. Apparently the length of the 2” exhaust manifold pipes coming from the rotor housing should be a wee bit longer than you generally have with a tangential (stuck up close the engine). My runners from housing to big 6” tube are only 4-5” long. I’m afraid that may hurt the total HP I generate and I’m really more concerned about HP than Db’s J
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Don Walker
Sent: Thursday, September 08, 2005 12:56 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] flyrotary_Web_Archive To Bob White, Jerry Hey and Joe Hull, Looking forward to you firing up your engines and seeing how well the Tangential muffler works. or doesn't work. If nothing else, it would make a good manifold to run out of to a SpinTech! Keep us all posted. I'll let you know Bob, when I figure out where the EC-1 will be placed on the firewall so we know the length of the wiring.
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