N20DG
Joined: 02 Jan 2008
Posts: 61
Location: lancaster, texas
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 Posted: Tue May 11, 2010 11:10 am Post subject: IVO Prop Motor Current Limiter and Electron ic CB |
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How is the tracking of those brushes??
I remember from way back when working on the Curtis Electric prop it was a major problem for the prop specialists to get it right. I would check and recheck them as part of the preflight to make sure they were tracking true and at say a twenty five hour check them with something like Prussian Blue or whatever Ron recommends for checking the tracking the brushes. If Prussian Blue doesn't ring a bell for you, it was what was used 60 years ago when I was working on them
Know you know my age
Dick
In a message dated 5/11/2010 6:16:58 A.M. Central Daylight Time, n801bh(at)netzero.com writes:
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To clarify things.....
Bob, it is the brushes that transfer the power to the prop motor on the hub,,, not the actual pitch change motor itself. When the first motor failed I did discuss this with Ron (at) Ivo ([email]Ron(at)Ivo[/email]) and he was insistant not for me to open the motor and do an autopsy on it but to just send it back. Which I did and he promply replaced it back then. I don't know if it tricky to open up, or there is some propritary stuff in it he doesn't was people to see or what.
do not archive.
Ben Haas
N801BH
www.haaspowerair.com
---------- Original Message ----------
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
To: aeroelectric-list(at)matronics.com
Subject: re: IVO Prop Motor Current Limiter and Electronic CB
Date: Mon, 10 May 2010 22:42:56 -0500
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
At 09:05 PM 5/10/2010, you wrote:
| Quote: | --> AeroElectric-List message posted by: "Bill Schertz" <wschertz(at)comcast.net>
I may be mistaken, but I thought the Ivo prop had brushes that were
rubbing all the time the prop was turning -- I.e. they transfer
power from the stationary part of the engine to the rotating prop,
which has the motor mounted on it, (which then rotates with the prop).
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Good questions. No doubt there are two sets of brushes.
One that conducts power from the stationary airframe and
rotating pitch motor assembly, a second set of brushes
run on the commutator within the permanent magnet motor.
So I need to expand my own question to ask which of
the two brush sets is demonstrating a service-life
issue.
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