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Date: Sat, 16 Aug 2003 18:49:18 -0700
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Ken Welter <rotary.coot@verizon.net>
Subject: Re: [FlyRotary] boost controllers
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   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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<html><head><style type="text/css"><!--
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 --></style><title>Re: [FlyRotary] boost
controllers</title></head><body>
<div>&nbsp; No and if so it would have to be mounted away from the
gate to keep it cool.</div>
<div>&nbsp;</div>
<div>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.</div>
<div>&nbsp;On this system I also remote mounted the cylinder about a
foot away to keep it cool.</div>
<div><br></div>
<div>&nbsp;Ken Welter</div>
<div><br></div>
<div><br></div>
<blockquote type="cite" cite><font
face="Arial">Greetings,</font></blockquote>
<blockquote type="cite" cite>&nbsp;</blockquote>
<blockquote type="cite" cite><font face="Arial">Has anyone ever seen
an aftermarket boost controller that uses a motor of some sort to
directly drive the wastegate?&nbsp;</font></blockquote>
<blockquote type="cite" cite>&nbsp;</blockquote>
<blockquote type="cite" cite><font face="Arial">I've found a couple of
controllers that will work&nbsp;as absolute pressure devices (HKS EVC
IV atm, and EVC PRO), but they use a stepper motor as a variable air
leak for the&nbsp;normal wastegate actuator.&nbsp; Even this would be
a step forward, but I'd need an actuator with a light spring.&nbsp; Of
course I can't tell how low these controllers will regulate, since
they only brag about the high end.&nbsp; Anyway, something else to
think about.&nbsp;&nbsp;&nbsp;&nbsp;</font></blockquote>
<blockquote type="cite" cite>&nbsp;</blockquote>
<blockquote type="cite" cite><font face="Arial">Speaking of light
springs in the actuator, how light could you go and still have it
work?&nbsp; In other words, if there was nothing hooked up to the
wastegate lever, would it have a tendency to open, or close?&nbsp; 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.&nbsp; As usual,
more questions than answers...</font></blockquote>
<blockquote type="cite" cite>&nbsp;</blockquote>
<blockquote type="cite" cite><font face="Arial">I'm starting to
imagine a big RC servo being controlled by some sort of electronics
connected to a MAP sensor.&nbsp; Hey Tracy, how about throw that into
my EM-2 :-)</font></blockquote>
<blockquote type="cite" cite>&nbsp;</blockquote>
<blockquote type="cite" cite><font
face="Arial">Rusty</font></blockquote>
<blockquote type="cite" cite><font face="Arial">The end is near...
uhh, make that in sight :-)</font></blockquote>
<div><br></div>
</body>
</html>
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