Today's Message Index:
----------------------
1. 07:11 AM - Airmaster failure (Justin Kennedy)
2. 07:17 AM - Re: Airmaster failure (G-IANI)
3. 10:57 AM - Re: Airmaster failure (Europa)
4. 11:06 AM - Airmaster failure (Fergus Kyle)
5. 11:52 AM - Re: Airmaster failure (Bud Yerly)
6. 03:51 PM - Re: Airmaster failure (Bud Yerly)
7. 04:04 PM - Re: Airmaster failure (JR Gowing)
Message 1
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| Subject: | Airmaster failure |
HI Guys,
I took off from Gap Tallard in the French Alps in Summer 2009 year and my A
irmaster refused to go into "Cruise". Meitrher Auto or Manual pitch control
worked. I had to fly the sortie in fine pitch. The possibility of overspee
d was ever present when you are used to the Airmaster doing the work. On in
spection the stud with the green wire attached to it had sheared just as yo
urs did. Luckily, thanks to very helpful French engineer on the airfield w
hose wife also fed myself and my wife, I was able to drill and tap a tiny h
ole into the broken stud and get a good connection going again. I was able
to get back to Scotland with this and indeed it proved so secure that I was
able to use it while Airmaster supplied me with the whole new three ring c
ircus. The studs are embedded behind the rings so I needed the whole thing.
Fitting a new ring requires removal of the propeller which was a big job f
or such a small failure. All working again.
No damage anywhere and the piece of stud dropped out when I removed the spi
nner so it must have lodged itself somewhere.
The outcome was a happy ending, a nasty moment in amongst the high mountain
s new friends made who we promise to revisit and quite a lot of work to put
right.
You asked .
Looking forward to some good weather this Summer, fingers crossed.
Safe flying all
Justin
G-ZTED Europa Classic Monowheel 912S Airmaster
Kit No:15
Message 2
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| Subject: | Airmaster failure |
Paul
Thanks for the explanation of which part broke.
Europa is the UK agent for Airmaster and should have minor spares such as
your failed stud. Let me know if they are not able to help and I can give
you contact details for Airmaster
Ian Rickard G-IANI XS Trigear, 300hours
Europa Club Mods Specialist
e-mail g-iani@ntlworld.com
Message 3
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| Subject: | Re: Airmaster failure |
Thanks Justin.
It sounds as if we are not the only ones. One of our group has talked to
Neil France today who was aware of previous incidences (unless it was you).
The offending stud and wire was the one controlling feathering. It has been
temporarily isolated so theat the controller works fine all be it without
the feather function.
Talking to Airmaster this evening =AD time zones etc.
In response to JR Gowing =AD up =8Ctil this little issue it seemed to be workin
g
great. I don=B9t fly, but those of the group who do found it simple to use an
d
the performance is fantastic.
Regards
Paul
G-GIDY
On 18/2/11 14:36, "Justin Kennedy" <Justin@systemwise.co.uk> wrote:
> HI Guys,
>
> I took off from Gap Tallard in the French Alps in Summer 2009 year and my
> Airmaster refused to go into =B3Cruise=B2. Meitrher Auto or Manual pitch cont
rol
> worked. I had to fly the sortie in fine pitch. The possibility of overspe
ed
> was ever present when you are used to the Airmaster doing the work. On
> inspection the stud with the green wire attached to it had sheared just a
s
> yours did. Luckily, thanks to very helpful French engineer on the airfie
ld
> whose wife also fed myself and my wife, I was able to drill and tap a tin
y
> hole into the broken stud and get a good connection going again. I was ab
le to
> get back to Scotland with this and indeed it proved so secure that I was
able
> to use it while Airmaster supplied me with the whole new three ring circu
s.
> The studs are embedded behind the rings so I needed the whole thing. Fitt
ing a
> new ring requires removal of the propeller which was a big job for such a
> small failure. All working again.
> No damage anywhere and the piece of stud dropped out when I removed the
> spinner so it must have lodged itself somewhere.
> The outcome was a happy ending, a nasty moment in amongst the high mounta
ins
> new friends made who we promise to revisit and quite a lot of work to put
> right.
> You asked .
>
> Looking forward to some good weather this Summer, fingers crossed.
> Safe flying all
> Justin
>
> G-ZTED Europa Classic Monowheel 912S Airmaster
> Kit No:15
>
>
>
>
Message 4
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| Subject: | Airmaster failure |
Gent'men,
I know nothing of the Airmaster, nor the applicable prop
installation, but having had a similar event i recalled the final assessment
was the exactly-sized pebble entered the prop cowl and sheared off a stud at
takeoff rpm.
Cheers, Ferg
Message 5
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| Subject: | Re: Airmaster failure |
Paul,
Forward the pictures to me, as an Airmaster Dealer, I am interested in
the failure and getting you in the air as soon as possible...
Please send your address, photo, prop propeller serial number and hours
on the prop and I will get you a replacement sent from Airmaster. If I
understand your post, the stud in question goes through the slip ring so
it is not normally repairable. The entire slip ring needs to be
replaced if that is the case, and the slip ring has changed from model
to model but it sounds like an AP332 three ring model.
I do not have a spare slip ring in the shop as it normally does not
fail, so we are very interested.
Best Regards,
Bud Yerly
Custom Flight Creations, Inc.
Europa Tech Support
Airmaster Dealer
www.customflightcreations.com<http://www.customflightcreations.com/>
(813) 653-4989
----- Original Message -----
From: Europa<mailto:europa@pstewart.f2s.com>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Thursday, February 17, 2011 5:08 PM
Subject: Re: Europa-List: Airmaster failure
<europa@pstewart.f2s.com<mailto:europa@pstewart.f2s.com>>
Thanks Ian but it's not the brushes. On the 'prop side' of the base
plate
the 3 slip rings each have a brass stud to which a wire is attached
then
running to the pitch motor. It is one of these studs which has
sheared. If I
get chance to take some I'll post a picture.
Regards
Paul
On 17/2/11 19:15, "G-IANI"
<g-iani@ntlworld.com<mailto:g-iani@ntlworld.com>> wrote:
<g-iani@ntlworld.com<mailto:g-iani@ntlworld.com>>
>
> Paul
>
> Do you mean a stud or was it one of the carbon "brushes" that run on
the
> slip ring. These do wear out over time and the wear is not even so
one goes
> before the others (I have had to change one of mine). Three spare
"brushes"
> are usually shipped with the prop. Changing them is not difficult
but does
> involve soldering. I have a spare. If you want to talk it through
you can
> ring me on 01483 714096
>
>
>
> Ian Rickard G-IANI XS Trigear, 300hours
> Europa Club Mods Specialist
> e-mail g-iani@ntlworld.com<mailto:g-iani@ntlworld.com>
>
>
>
> -----Original Message-----
> From:
owner-europa-list-server@matronics.com<mailto:owner-europa-list-server@ma
tronics.com>
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Europa
> Sent: 17 February 2011 18:43
> To: europa-list@matronics.com<mailto:europa-list@matronics.com>
> Subject: Europa-List: Airmaster failure
>
<europa@pstewart.f2s.com<mailto:europa@pstewart.f2s.com>>
>
> Just had an open circuit failure of our Airmaster CS prop. Upon
> investigation one of studs providing wire connection from the slip
rings to
> the pitch motor (the green wire) has sheared off!
>
> No apparent damage to inside of spinner or blades and obviously no
evidence
> of the sheared bit of stud.
>
> Anyone seen anything similar or any other thoughts.
>
> Just recovered aircraft to workshop to investigate potential for
repair.
>
> Regards
>
> Paul
> G-GIDY
>
>
>
>
>
>
>
>
>
>
>
>
>
http://www.matronics.com/Navigator?Europa-List<http://www.matronics.com/N
avigator?Europa-List>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
Message 6
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| Subject: | Re: Airmaster failure |
Airmaster failureFerg, Justin and Paul.
Should the nut come loose on that or any stud, the nut becomes the
foreign object and can be responsible, but more than likely not, as the
spinner hole is large enough that a foreign object can easily enter the
hub. That said, the forward side of the back plate spins with the prop
so in my opinion it can't generate enough torque to impact that stud
hard enough. The next likely is fatigue failure do to some looseness in
the bolt, over torque or the wrong material, and that is why I am so
interested. Nylon lock nuts are great in that they don't need much
torque and hold up well, but forward of the firewall heat it will
sometimes rob them of there "stickiness" and age takes a bit of a toll.
The prop does not get that warm to compromise a nyloc so it is an
interesting failure. A good investigation and proper scratch analysis
will Anyway
Anway
, I'll inform Martin at Airmaster.
Regards,
Bud Yerly
Europa Tech Support
Airmaster Dealer
Custom Flight Creations, Inc.
www.customflightcreations.com<http://www.customflightcreations.com/>
(813) 653-4989
----- Original Message -----
From: Fergus Kyle<mailto:VE3LVO@rac.ca>
To: 5EUROPALIST <mailto:europa-list@matronics.com>
Sent: Friday, February 18, 2011 1:57 PM
Subject: Europa-List: Airmaster failure
Gent'men,
I know nothing of the Airmaster, nor the applicable prop
installation, but having had a similar event i recalled the final
assessment was the exactly-sized pebble entered the prop cowl and
sheared off a stud at takeoff rpm.
Cheers, Ferg
http://www.matronics.com/Navigator?Europa-List<http://www.matronics.com/N
avigator?Europa-List>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
Message 7
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| Subject: | Airmaster failure |
Thank you Paul for the reassurance!
JR (Bob) "gowing in Oz
Do not archive
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Europa
Sent: Saturday, 19 February 2011 5:45 AM
Subject: Re: Europa-List: Airmaster failure
Thanks Justin.
It sounds as if we are not the only ones. One of our group has talked to
Neil France today who was aware of previous incidences (unless it was you).
The offending stud and wire was the one controlling feathering. It has been
temporarily isolated so theat the controller works fine all be it without
the feather function.
Talking to Airmaster this evening - time zones etc.
In response to JR Gowing - up 'til this little issue it seemed to be working
great. I don't fly, but those of the group who do found it simple to use and
the performance is fantastic.
Regards
Paul
G-GIDY
On 18/2/11 14:36, "Justin Kennedy" <Justin@systemwise.co.uk> wrote:
HI Guys,
I took off from Gap Tallard in the French Alps in Summer 2009 year and my
Airmaster refused to go into "Cruise". Meitrher Auto or Manual pitch control
worked. I had to fly the sortie in fine pitch. The possibility of overspeed
was ever present when you are used to the Airmaster doing the work. On
inspection the stud with the green wire attached to it had sheared just as
yours did. Luckily, thanks to very helpful French engineer on the airfield
whose wife also fed myself and my wife, I was able to drill and tap a tiny
hole into the broken stud and get a good connection going again. I was able
to get back to Scotland with this and indeed it proved so secure that I was
able to use it while Airmaster supplied me with the whole new three ring
circus. The studs are embedded behind the rings so I needed the whole thing.
Fitting a new ring requires removal of the propeller which was a big job for
such a small failure. All working again.
No damage anywhere and the piece of stud dropped out when I removed the
spinner so it must have lodged itself somewhere.
The outcome was a happy ending, a nasty moment in amongst the high mountains
new friends made who we promise to revisit and quite a lot of work to put
right.
You asked .
Looking forward to some good weather this Summer, fingers crossed.
Safe flying all
Justin
G-ZTED Europa Classic Monowheel 912S Airmaster
Kit No:15
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