Return-Path: Received: from sccrmhc13.comcast.net ([204.127.202.64] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 379426 for flyrotary@lancaironline.net; Thu, 26 Aug 2004 13:50:09 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.202.64; envelope-from=kenpowell@comcast.net Received: from 204.127.205.149 ([204.127.205.149]) by comcast.net (sccrmhc13) with SMTP id <2004082617493401600jtqv7e>; Thu, 26 Aug 2004 17:49:39 +0000 Received: from [166.102.160.133] by 204.127.205.149; Thu, 26 Aug 2004 17:49:34 +0000 From: kenpowell@comcast.net To: "Rotary motors in aircraft" Subject: Rusty's intake again Date: Thu, 26 Aug 2004 17:49:34 +0000 Message-Id: <082620041749.23933.412E22AE00069F7100005D7D220075894204040A99019F020A05@comcast.net> X-Mailer: AT&T Message Center Version 1 (Jul 16 2004) X-Authenticated-Sender: a2VucG93ZWxsQGNvbWNhc3QubmV0 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_23933_1093542574_0" --NextPart_Webmail_9m3u9jl4l_23933_1093542574_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Rusty, Is the engine 'seeing' a LONG intake tube at WOT? In other words, when the TB is WOT the engine is seeing an intake tube length of 20" - 24" (from looking at the picture) due to the CEET tubing instead of 12" - 14" (from the rotor to the TB). If the intake is functioning as LONG then the engine will not rev. Rotaries are sensitive to intake length. Try a flight with only the TB and air horns. Kenb Powell -------------- Original message -------------- Being as how I'm firmly NA, I've received one message "loud and clear": take extra care to make my intake path as smooth and unrestricted as I possibly can. Dale R. Great. I'm glad to see that some of my babble will reduce the pain and suffering of others :-) BTW, I've decided to make an airbox that will bolt to the TB, and incorporate the airhorns that are currently in place. It will have a 3" inlet duct going back to the right radiator duct if possible. If I can't fit the 3" duct under the radiator, then I'll have to make a new scoop. Just won't know until I get the parts in hand. I'm (stubbornly) going to continue trying to use CEET (lower temp, cheaper SCEET) tubing, even though it has some turbulent flow when bent. If it works well, I'll eventually fit a smooth tube of some type. Cheers, Rusty (running out of rev numbers) --NextPart_Webmail_9m3u9jl4l_23933_1093542574_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Rusty,

Is the engine 'seeing' a LONG intake tube at WOT? In other words, when the TB is WOT the engine is seeing an intake tube length of 20" - 24" (from looking at the picture) due to the CEET tubing instead of 12" - 14" (from the rotor to the TB). If the intake is functioning as LONG then the engine will not rev. Rotaries are sensitive to intake length. Try a flight with only the TB and air horns.

Kenb Powell

-------------- Original message --------------

Being as how I'm firmly NA, I've received one message
"loud and clear": take extra care to make my intake path as
smooth and unrestricted as I possibly can.

Dale R.

Great. I'm glad to see that some of my babble will reduce the pain and suffering of others :-)

BTW, I've decided to make an airbox that will bolt to the TB, and incorporate the airhorns that are currently in place. It will have a 3" inlet duct going back to the right radiator duct if possible. If I can't fit the 3" duct under the radiator, then I'll have to make a new scoop. Just won't know until I get the parts in hand. I'm (stubbornly) going to continue trying to use CEET (lower temp, cheaper SCEET) tubing, even though it has some turbulent flow when bent. If it works well, I'll eventually fit a smooth tube of some type.

Cheers,

Rusty (running out of rev numbers)

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