Hi! Svein and all CS /Inflight variable props.
When I had my MT CS prop it was necessary for me to fabricate my own bracket
to hold the brush holder in place to mate with the slip rings.
The major requirement of adjustment if I recall correctly was that the
brushes should be at a 2 degree "Trailing" attitude( with no tolerances
applicable) to the direction of rotation and exactly on the centre line.
(It was completely unacceptable that there should be any leading/"Pushing"
angle)
I would expect that MT are one of the most experienced producers of this
type of Propeller and would never attempt to contradict their design wishes.
Hope this information helps you not forgetting that the actual measurement
of the dimension as small as that is quite a trial of competence of the
average builder.
Regards
Bob Harrison G-PTAG Now with Rotax 914 and Woodcomp SR 3000. ( with one
brush replaced ) since new but last season was given a works refurb in Cech
.at 300 hours approx.
When I've time I will do some hour calcs.
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Sidsel & Svein
Johnsen
Sent: 18 April 2012 16:17
Subject: SV: Europa-List: Airmaster AP332: replacement of slip ring brishes
Max,
My first set of brushes lasted only 110 hours, then all three were worn out
- got the fault indication on the controller panel. Martin at Airmaster
said it was maybe a bit short even for a new prop, but shorter than normal
should be expected due to new slip rings.
"New" is a relative term - the brushes and rings were unused when the hours
started counting, but they had both been manufactured some 5 years earlier.
Whether this played any role, I don't know.
Regards,
Svein
LN-SKJ
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