Today's Message Index:
----------------------
1. 01:25 AM - Re: Airmaster prop controller problem (Richard Iddon)
2. 01:34 AM - Airmaster prop controller problem (Keith Hickling)
3. 04:58 AM - Re: Flap cross tube (William Daniell)
4. 05:40 AM - Re: Flap cross tube (Frans Veldman)
Message 1
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Subject: | Airmaster prop controller problem |
Terry.
Check the carbon brushes are OK if you haven't already. I have replaced
mine
twice, they seem to last about 200/250 hours. I visited Airmaster late
last
year. The latest units have the brushes on the shaft rather than the
back
plate of the spinner flange which should help the brushes last longer I
guess. My prop has also occasionally got it's knickers in a twist and
refused to work properly. No idea what caused it but resetting the
breaker
has sorted it out so far.
Richard Iddon G-RIXS
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Terry
Seaver
(terrys)
Sent: 04 January 2010 21:03
Subject: Europa-List: Airmaster prop controller problem
Hi,
For those of you who have the Airmaster prop:
I went flying yesterday for the first time in 6 weeks. During the
run-up, I normally check for ignition drop at 4000 rpm, then place the
prop
in 'manual', increase pitch until rpms drop to 3500, then place the
switch
back to 'auto' and make sure the rpms return to 4000. This time, when I
went back to 'auto', nothing happened (rpms remained at 3500). Going
back
to 'manual', I was able to go back to fine pitch and 4000 rpm. Tried
again,
same thing.
I turned the circuit breaker for the prop controller off and back
on,
then tried the test again and it worked this time, i.e. the prop went
back
to fine and 4000 rpm when I selected 'auto'.
Has anyone else had this happen to them?
Any ideas about what the problem was/is?
Regards,
Terry Seaver
A135, XS monowheel with 912S, Airmaster prop.
Checked by AVG - www.avg.com
01/03/10
09:41:00
Message 2
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Subject: | Airmaster prop controller problem |
Hi Terry,
I have had 2 controller failures. The first was during ground testing,
before my first flight in July. After initially working fine, the
controller started intermittently not governing, and at times showed
both the coarse and fine LEDs lit green at once, which should never
occur. At other times it governed normally. Airmaster replaced the
controller for me, and the new one operated perfectly for 40 hours. Then
in September it stopped governing completely soon after takeoff. It
operated normally on manual, but did not govern at all and this time
showed no indicator LEDs. I tried resetting the resettable internal
fuse, but either the fuse was not the problem or it would not reset.
Airmaster again replaced the controller for me, and the new one is
operating correctly. Both times, it still operated correctly on manual.
The manual describes the correct indications from the LEDs and what they
show in various failure modes, including if the controller is not
receiving a speed signal from the prop (flashing orange, as occurs with
engine stopped).
Martin at Airmaster was very helpful. You can contact him if you need to
at support@airmasterpropellers.com or the phone number is in the
manual. He could not find a fault with the first controller (perhaps
because it was intermittent) and I have not heard from him yet about the
problem with the second controller.
I was naturally quite concerned at having a second failure, and asked
Martin if it's OK to have the controller on during starting. He said
yes, and most people do, and that they have only seen 1 or 2 controller
failures before. I would be interested in what your problem turns out to
be.
Regards,
Keith Hickling,
New Zealand.
----- Original Message -----
From: Terry Seaver (terrys)
To: europa-list@matronics.com
Sent: Tuesday, January 05, 2010 10:03 AM
Subject: Europa-List: Airmaster prop controller problem
Hi,
For those of you who have the Airmaster prop:
I went flying yesterday for the first time in 6 weeks. During the
run-up, I normally check for ignition drop at 4000 rpm, then place the
prop in 'manual', increase pitch until rpms drop to 3500, then place the
switch back to 'auto' and make sure the rpms return to 4000. This time,
when I went back to 'auto', nothing happened (rpms remained at 3500).
Going back to 'manual', I was able to go back to fine pitch and 4000
rpm. Tried again, same thing.
I turned the circuit breaker for the prop controller off and back
on, then tried the test again and it worked this time, i.e. the prop
went back to fine and 4000 rpm when I selected 'auto'.
Has anyone else had this happen to them?
Any ideas about what the problem was/is?
Regards,
Terry Seaver
A135, XS monowheel with 912S, Airmaster prop.
Message 3
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Subject: | Re: Flap cross tube |
My first boss used to say the only stupid question is the one you don't
ask...so thanks for the question .
As it happens the difference between the wing roots and the fuselage is
small 1-2mm not of the order of about 10mm so thankfully that is not the
issue.
I think that the issue is less of a problem than I had thought given
that the minimum engagement with flap pins is 10mm.
Continuing in the subject of aileron jamming I don't see how the flaps
could have jammed the aileron given that the two are separated by a
fiberglass close out or at least at the root...or am I being thick
(perfectly possible)?
I have tried moving my flaps outboard as far as they will go at full
deflection and they rub against the outboard close out of the flap slot
not against the aileron. Further extension is prevented by the outboard
hinge assembly.
Will
craig bastin wrote:
>
>
> "As to why this has occurred I am not really too sure. the root of one
> of the wings is slightly further away from the fuselage than the other.
> Given that the spar alignment bush holes are pre-drilled I assumed that
> this is normal..."
>
> this may be a stupid question, but you have done the lift / drag socket
> install, to fix the alignment wings/fuse, if so and its the port side wing
> that is closer by about 10mm, then yes there seem to be a few kits with this
> issue.
>
>
>
Message 4
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Subject: | Re: Flap cross tube |
On 01/05/2010 01:56 PM, William Daniell wrote:
> Continuing in the subject of aileron jamming I don't see how the flaps
> could have jammed the aileron given that the two are separated by a
> fiberglass close out or at least at the root...or am I being thick
> (perfectly possible)?
I'm not sure exactly how, but the pilot involved is a professional and
not making things up. I also know that the alerted rescue team
afterwards was quite shocked when they discovered in what condition the
airplane was landed.
What happened is that the pin slipped out of the socket, and then rested
against the edge of the socket. If you then retract the flaps, the
forces involved are huge, and likely to bend anything, including the
outboard hinges.
I don't know how much clearance there was between flap and aileron in
that particular airplane. Keep in mind though that during flight the
wings will bend somewhat, and that clearance might be smaller than normal.
I believe that the event was covered in detail on this list.
Anyway, it happened, it was a serious event, and it was worth an SB.
Frans
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