Europa-List Digest Archive

Thu 04/19/12


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 03:12 AM - Re: Airmaster AP332: replacement of slip ring brishes (Remi Guerner)
     2. 08:30 AM - Re: mass balance stop and pushrod containment assembly (John Cliff)
     3. 08:44 AM - Re: SV: Airmaster AP332: replacement of slip ring brishes (rampil)
     4. 09:37 AM - Re: SV: Airmaster AP332: replacement of slip ring brishes (stephen vestuti)
     5. 09:48 AM - Re: Airmaster AP332: replacement of slip ring brishes (Raimo Toivio)
     6. 11:41 AM - Re: Airmaster AP332: replacement of slip ring brishes (Bob Harrison)
 
 
 


Message 1


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    Time: 03:12:23 AM PST US
    Subject: Re: Airmaster AP332: replacement of slip ring brishes
    From: "Remi Guerner" <air.guerner@orange.fr>
    Hi Max, I replaced my first set of brushes after 266 hours. They were found to be about 80 percent worn out. Now I have 272 hours on those brushes, so I am planning to replace them again right now, so that I do not get into trouble during the summer season. Regards Remi Guerner F-PGKL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=371252#371252


    Message 2


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    Time: 08:30:05 AM PST US
    From: John Cliff <johnfcliff@googlemail.com>
    Subject: Re: mass balance stop and pushrod containment assembly
    Rowland, see also www.crix.org.uk, Techniques section, Rear Fuselage Build Procedure page. John Cliff #0259


    Message 3


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    Time: 08:44:10 AM PST US
    Subject: Re: SV: Airmaster AP332: replacement of slip ring brishes
    From: "rampil" <ira.rampil@gmail.com>
    Hi All, Another interesting failure mode of the brush system occurred to me at about 290 hours. I had a tiny (very tiny) oil leak from the hydraulic hose fittings at the oil pump assembly. (I had replaced the clunky, inaccurate VDO sensor with a mil-spec transducer mounted on the fire-wall). The negative direction airflow around the gear box deposited the oil film on slip ring plate where, mixed with the carbon dust, it shorted out the rings and failed the controller. The allowed a transient overspeed condition on takeoff power. Wiping the plate with a rag fixed the condition and tightening the connectors fixed the leak. Motto: No good deed goes unpunished -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=371284#371284


    Message 4


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    Time: 09:37:43 AM PST US
    Subject: Re: SV: Airmaster AP332: replacement of slip ring brishes
    From: "stephen vestuti" <s.vestuti@gmail.com>
    Ira, Was the controller trashed or just a fuse ? Steve. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=371296#371296


    Message 5


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    Time: 09:48:44 AM PST US
    From: "Raimo Toivio" <raimo.toivio@rwm.fi>
    Subject: Re: Airmaster AP332: replacement of slip ring brishes
    Dear Bob, do you remember how much the MT brushes protrude out of the box ie. what is the lenght of the unsupported brush part = the cap between slip rings and a brush box brush side ? I my case (just what happen to be in my Rotax & Airmaster combination) this measure is about 1 mm or even less. I think then it is no matter if brushes are a bit =9Ctrailing=9D, =9Cstraight=9D or even =9Cleading=9D. They will anyway soon worn out to totall slip ring contact. Cheers, Raimo Finland OH-XRT From: Bob Harrison Sent: Wednesday, April 18, 2012 11:21 PM Subject: RE: Europa-List: Airmaster AP332: replacement of slip ring brishes Hi! Svein , I would still prefer to measure the actual angles and especially prove them to be =9Ctrailing =9C Regards Bob H From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Sidsel & Svein Johnsen Sent: 18 April 2012 20:20 Subject: SV: Europa-List: Airmaster AP332: replacement of slip ring brishes Hi Bob, Appreciate your comments regarding correct installation of the brushes relative to the rings. My Airmaster was delivered with a brush bracket for Rotax 912ULS. The holes matched exactly the holes on the left side of the gearbox, and the distance to the slip rings looks right (small unsupported length of the brushes sticking out, yet clearance to avoid the bracket touching the rings). Regards Svein http://www.matronics.com/Navigator?Europa-List


    Message 6


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    Time: 11:41:03 AM PST US
    From: Bob Harrison <ptag.dev@tiscali.co.uk>
    Subject: Airmaster AP332: replacement of slip ring brishes
    Hi! Raimo First off ....how is that little girl? I hope now home and happy? If my memory serves me right I think the block was 0.0025=9D clear of the slip ring, but with any slack in the propeller assembly must be pushed back for worst case scenario. Trailing , leading or straight provides differing brush loads .... Leading being the heaviest and hence more wear more quickly. Regards Bob H G-PTAG From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Raimo Toivio Sent: 19 April 2012 17:48 Subject: Re: Europa-List: Airmaster AP332: replacement of slip ring brishes Dear Bob, do you remember how much the MT brushes protrude out of the box ie. what is the lenght of the unsupported brush part = the cap between slip rings and a brush box brush side ? I my case (just what happen to be in my Rotax & Airmaster combination) this measure is about 1 mm or even less. I think then it is no matter if brushes are a bit =9Ctrailing=9D, =9Cstraight=9D or even =9Cleading=9D. They will anyway soon worn out to totall slip ring contact. Cheers, Raimo Finland OH-XRT From: Bob Harrison <mailto:ptag.dev@tiscali.co.uk> Sent: Wednesday, April 18, 2012 11:21 PM Subject: RE: Europa-List: Airmaster AP332: replacement of slip ring brishes Hi! Svein , I would still prefer to measure the actual angles and especially prove them to be =9Ctrailing =9C Regards Bob H From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Sidsel & Svein Johnsen Sent: 18 April 2012 20:20 Subject: SV: Europa-List: Airmaster AP332: replacement of slip ring brishes Hi Bob, Appreciate your comments regarding correct installation of the brushes relative to the rings. My Airmaster was delivered with a brush bracket for Rotax 912ULS. The holes matched exactly the holes on the left side of the gearbox, and the distance to the slip rings looks right (small unsupported length of the brushes sticking out, yet clearance to avoid the bracket touching the rings). Regards Svein http://www.matronics.com/Navigator?Europa-List href="http://www.matronics.com/Navigator?Europa-List">http://www.matron href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c




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