I have installed a balance type ammeter in the prop circuit as is being discussed here. In the attached photo of my engine/prop control cluster you can see that the prop control is labeled, not the meter. The meter is installed vertically and deflects in the same direction as the control switch so there is no need to label the meter since it is just a visual reference to assure that when you deflect the control that something is actually happening. This has already saved me lots of time troubleshooting when the prop adjustment is not working. Jim
Ed Anderson <eanderson@carolina.rr.com> wrote: Buley, Just so you have the frame of reference firmly in your mind. For
example, you could either have the amp meter labeled with the first order
effect - Lower Pitch /Higher Pitch or second order
effect Higher
RPM/Lower RPM. Since it is engine rpm that I would be primarily interested
in, I (if I had a variable pitch prop) might label the meter with Higher
RPM/Lower RPM or perhaps Increase RPM/Decrease RPM rather than lower
pitch/higher pitch (the latter requires some mental manipulation). Just a
point of view.
Ed
----- Original Message -----
From: "Bulent Aliev"
To: "Rotary motors in aircraft"
Sent: Friday, May 26, 2006 6:39 AM
Subject: [FlyRotary] Re: Ammeter/Ivo
> Kelly, I was thinking mounting it vertical. Low pitch down, High pitch up
> ? same with the switch.
> Buly
> On May 26, 2006, at 1:07 AM, Kelly Troyer wrote:
>
>> Bulent,
>> Forgot to note that you need to label one side of the ammeter "pitch
>> increase"
>> and the other side "pitch decrease"......With a single sweep
ammeter you
>> would
>> not always know where you were in pitch if you forgot which way your
>> switch
>> was wired ("Now was that up or down for more pitch??")......
>> --
>> Kelly Troyer
>> Dyke Delta/13B/RD1C/EC2
>>
>>
>>
>>
>> -------------- Original message from keltro@att.net (Kelly
>> royer): --------------
>>
>> Bulent,
>> When prop is at midpoint of pitch there is essentially no load on the
>> motor.
>> When you add pitch the ammeter needle swings one way (from 0 to ? amps).
>> When you reduce pitch you are reversing polarity of the D.C. motor and
>> it
>> turns opposite direction and loads the ammeter to the opposite
>> side........
>> --
>> Kelly Troyer
>> Dyke
Delta/13B/RD1C/EC2
>>
>>
>>
>>
>> -------------- Original message from Bulent Aliev
>> : --------------
>>
>>
>> > I need a second opinion on the ammeter setup for the Ivo prop. John
>> > Slade is using the centering kind. I think it should be one sweep
>> > from 0-15 or 0-20A? Anyone else using the same setup, please let me
>> > know the details.
>> > Buly
>> > http://tinyurl.com/dcy36
>> >
>> >
>> >
>> >
>> > --
>> > Homepage: http://www.flyrotary.com/
>> > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
>
> Buly
> http://tinyurl.com/dcy36
>
>
>
>
> --
> Homepage: http://www.flyrotary.com/
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http://mail.lancaironline.net/lists/flyrotary/
>
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