Return-Path: Received: from out001.verizon.net ([206.46.170.140] verified) by logan.com (CommuniGate Pro SMTP 4.1.1) with ESMTP id 2530730 for flyrotary@lancaironline.net; Sat, 16 Aug 2003 21:50:34 -0400 Received: from [67.227.200.56] ([67.227.200.186]) by out001.verizon.net (InterMail vM.5.01.05.33 201-253-122-126-133-20030313) with ESMTP id <20030817015029.IWNI1299.out001.verizon.net@[67.227.200.56]> for ; Sat, 16 Aug 2003 20:50:29 -0500 Mime-Version: 1.0 X-Sender: res0c5l1@incoming.verizon.net Message-Id: In-Reply-To: References: Date: Sat, 16 Aug 2003 18:49:18 -0700 To: "Rotary motors in aircraft" From: Ken Welter Subject: Re: [FlyRotary] boost controllers Content-Type: multipart/alternative; boundary="============_-1151037434==_ma============" X-Authentication-Info: Submitted using SMTP AUTH at out001.verizon.net from [67.227.200.186] at Sat, 16 Aug 2003 20:50:28 -0500 --============_-1151037434==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" No and if so it would have to be mounted away from the gate to keep it cool. I have made butterfly waist gates before and used air air cylinder to activate it, I used no spring, instead I pressurized one side of the cylinder with air as the spring so I could cockpit adjust it and the other side I ran manifold pressure to activate it. On this system I also remote mounted the cylinder about a foot away to keep it cool. Ken Welter >Greetings, > >Has anyone ever seen an aftermarket boost controller that uses a >motor of some sort to directly drive the wastegate? > >I've found a couple of controllers that will work as absolute >pressure devices (HKS EVC IV atm, and EVC PRO), but they use a >stepper motor as a variable air leak for the normal wastegate >actuator. Even this would be a step forward, but I'd need an >actuator with a light spring. Of course I can't tell how low these >controllers will regulate, since they only brag about the high end. >Anyway, something else to think about. > >Speaking of light springs in the actuator, how light could you go >and still have it work? In other words, if there was nothing hooked >up to the wastegate lever, would it have a tendency to open, or >close? I'm guessing that it would try to open, so you need some >spring pressure to hold it closed, but how much, I haven't a clue. >As usual, more questions than answers... > >I'm starting to imagine a big RC servo being controlled by some sort >of electronics connected to a MAP sensor. Hey Tracy, how about >throw that into my EM-2 :-) > >Rusty >The end is near... uhh, make that in sight :-) --============_-1151037434==_ma============ Content-Type: text/html; charset="us-ascii" Re: [FlyRotary] boost controllers
  No and if so it would have to be mounted away from the gate to keep it cool.
 
I have made butterfly waist gates before and used air air cylinder to activate it, I used no spring, instead I pressurized one side of the cylinder with air as the spring so I could cockpit adjust it and the other side I ran manifold pressure to activate it.
 On this system I also remote mounted the cylinder about a foot away to keep it cool.

 Ken Welter


Greetings,
 
Has anyone ever seen an aftermarket boost controller that uses a motor of some sort to directly drive the wastegate? 
 
I've found a couple of controllers that will work as absolute pressure devices (HKS EVC IV atm, and EVC PRO), but they use a stepper motor as a variable air leak for the normal wastegate actuator.  Even this would be a step forward, but I'd need an actuator with a light spring.  Of course I can't tell how low these controllers will regulate, since they only brag about the high end.  Anyway, something else to think about.    
 
Speaking of light springs in the actuator, how light could you go and still have it work?  In other words, if there was nothing hooked up to the wastegate lever, would it have a tendency to open, or close?  I'm guessing that it would try to open, so you need some spring pressure to hold it closed, but how much, I haven't a clue.  As usual, more questions than answers...
 
I'm starting to imagine a big RC servo being controlled by some sort of electronics connected to a MAP sensor.  Hey Tracy, how about throw that into my EM-2 :-)
 
Rusty
The end is near... uhh, make that in sight :-)

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