Hi! Terry.
The relay sticks in the up mode and will not reverse until full travel
position then reverses and hides the fault Which ever switch you use.. Take
Scott Menzemer's advice and get a MK2 relay.
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Terry Seaver
(terrys)
Sent: 02 March 2010 00:11
Subject: RE: Europa-List: Electric Trim Problems
<terrys@cisco.com>
We have been having problems with sticking trim, both directions, but
only from the rocker switch in the instrument panel. The trim buttons
on our pilot's stick never seem to have that problem. Since both sets
of switches are connected to the same circuit at the relay deck, It
seems that it would have to be a bad switch, not the relay deck. Only
if sticking were from both switch positions would I expect it to be a
relay deck problem.
Any comments would be appreciated, since I am just about to replace the
panel mounted rocker switch.
Terry Seaver
A135
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Gavin &
Anne
Sent: Monday, March 01, 2010 2:01 PM
Subject: RE: Europa-List: Electric Trim Problems
Hi Bob and John
This is very coincidental, I am just in the process of fitting a new RS2
rocker switch on the panel because of a sticking trim. As you say it
sticks
when trimming down and I have to reverse the direction to rectify the
situation. I had a spare rocker switch from some time ago when I had a
trim
runaway and bought a new switch but it never recurred so didn't fit it.
I also run the system with a stick top grip through a RayAllen relay
deck,
probably the mark one which I have had for some time
What you are saying is that the Relay is the problem.
I'll email RayAllen and see what they say
Thanks
Gavin Lee....... ZK-EPA #355
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Robert C
Harrison
Sent: Monday, 1 March 2010 11:05 p.m.
Subject: RE: Europa-List: Electric Trim Problems
<ptag.dev@tiscali.co.uk>
Hi! John.
Yes I can tell you all about it and most who fly with me can also!
I had this problem initially a number of years ago and the Ray Allen
people
assured me it must be a wiring failure, the hassle proving all the
circuitry
needs to be done to be believed. Still the failure was intermittently
present. Next I had to remove the servo (fortunately I had built in a
facility which locked the servo locating bolt heads enabling the nuts to
be
removed from the rear...in anticipation of needing it out!) I returned
it to
Ray Allen Company where they failed to reproduce the symptoms. In my
case
the failure was identical to yours and I found much to my horror that if
I
let go of the control stick and trimmed fully nose up (scary because you
wouldn't land it like that and the forces on the stabilators and rear
controls are phenomenal)it then will be possible to reverse the trim
motor.
They returned the servo after checking and for good measure included a
replacement MK1 relay for 50% of the normal price.
I refitted the servo and also replaced the relay. The problem had been
cured.
Some considerable time ensued before the identical problem returned.
I have reported this to the Ray Allen and they said they had now
identified
that the MK1 Relay actually fails but in one direction only so when the
system is reversed it hides the fault.
They have now (again at 50% cost) have sent a MK2 relay saying that they
have at last identified the original fault. The MK2 is slightly
different in
shape and size and sitting on my desk awaiting fitting.
Pleased to be of service to you with this news...(as usual I am out in
front
where trouble is concerned !)
However I now am most concerned that you aren't preceding me with the
MK2
which is failed? If you would advise me that I'd be obliged.
My system has a panel trim switch and a control stick top trim switch
too.
Regards
Bob Harrison G-PTAG Rotax 914.
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of John Price
Sent: 01 March 2010 09:00
Subject: Europa-List: Electric Trim Problems
<nicolaprice@tiscali.co.uk>
Any help on this one would be gratefully received.
Classic Monowheel G-SHSH now flying for over 6 years.
We have now an intermittent fault on the electric trim.
The controller is by a 'coolie hat' on the stick driving a Ray Allen
servo.
The trim will always work nose up but has an intermittent fault when
used to
trim nose down.
We have replaced the switch and the servo but still the problem remains.
Any thoughts ?
John Price.
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http://forums.matronics.com/viewtopic.php?p=288706#288706
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