---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Fri 02/18/11: 7 ---------------------------------------------------------- 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 _____________________________________ Time: 07:11:48 AM PST US From: Justin Kennedy Subject: Europa-List: 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 _____________________________________ Time: 07:17:59 AM PST US From: "G-IANI" Subject: RE: Europa-List: 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 _____________________________________ Time: 10:57:16 AM PST US Subject: Re: Europa-List: Airmaster failure From: Europa 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" 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 _____________________________________ Time: 11:06:30 AM PST US From: Fergus Kyle 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 ________________________________ Message 5 _____________________________________ Time: 11:52:47 AM PST US From: "Bud Yerly" Subject: Re: Europa-List: 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 (813) 653-4989 ----- Original Message ----- From: Europa To: europa-list@matronics.com Sent: Thursday, February 17, 2011 5:08 PM Subject: Re: Europa-List: Airmaster failure > 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" > wrote: > > > 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 > > > > -----Original Message----- > From: owner-europa-list-server@matronics.com > [mailto:owner-europa-list-server@matronics.com] On Behalf Of Europa > Sent: 17 February 2011 18:43 > To: europa-list@matronics.com > Subject: Europa-List: Airmaster failure > > > > 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/contribution ________________________________ Message 6 _____________________________________ Time: 03:51:39 PM PST US From: "Bud Yerly" Subject: Re: Europa-List: 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 (813) 653-4989 ----- Original Message ----- From: Fergus Kyle To: 5EUROPALIST 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/contribution ________________________________ Message 7 _____________________________________ Time: 04:04:14 PM PST US From: "JR Gowing" Subject: RE: Europa-List: 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" 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 Email Forum - ist">http://www.matronics.com/Navigator?Europa-List ; - MATRONICS WEB FORUMS - matronics.com ;- List Contribution Web Site - ; -Matt Dralle, List Admin. ://www.matronics.com/contribution _____ No virus found in this message. 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