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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
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