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Message-ID: <4ADBD4DB.6010800@gmail.com>
Date: Sun, 18 Oct 2009 21:54:19 -0500
From: Dave <david.staten@gmail.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: IVO Question (was) Static rpm
References: <list-3890358@logan.com>
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25 or 30 amp bi directional ammeter mounted with appropriate shunt IN 
LINE/Series with prop circuit. The circuit breaker pops at 20 on the 
IVO.  The current varies with the amount of resistance on the prop 
adjustment motor. Mid range pitch draws very little current so it will 
be towards the middle of the scale. Large deflections from midrange 
pitch will cause large indications on the ammeter.

This is an instantaneous reading that is seen only when the prop circuit 
is being energized. Bi directional is used so that you can roughly gauge 
how much the prop is from mid range towards the limits as you both 
coarsen and fine the blade pitch.

Someone on here years ago posted the right shunt to use, and I bought 
it.. but that email is on another machine. Good luck with the archive 
search.

Dave


stephen haas wrote:
> Interesting concept... Tell me more please sir.
>
>
> --- On *Sun, 10/18/09, James Maher /<delta11xd@att.net>/* wrote:
>
>
>     From: James Maher <delta11xd@att.net>
>     Subject: [FlyRotary] Re: IVO Question (was) Static rpm
>     To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>     Date: Sunday, October 18, 2009, 12:31 PM
>
>