PPRuNe Forums - View Single Post - Alternator ON or OFF
View Single Post
Old 16th June 2012 | 13:43
  #21 (permalink)  
LeadSled
20 Anniversary
 
Joined: Jul 2001
Posts: 4,960
Likes: 17
From: Australia
Breeza,
I disagree about the chrysler alternator point. Why.. I am not going to digress here in public. Happy to pm you about it tho.
jass,
I'm with you. In the G.O.Ds, I well remember the guy at Hawker DeHavilland, with his little number punches, putting numbers on the said Chrysler alternators one by one, from a bulk buy at the local dealer, and raising a record, then chanting the magic incantation that turned auto parts into "fully approved aviation quality genuine spare parts".

I can probably dig up an old list I has that cross referenced the commercial sources of just about the whole electrical system on most Piper aircraft.

To this day, this is the mechanism whereby ball an roller bearings from CBC or Bearing Services have the CAR 30 holy water sprinkled on them, turning them into "genuine aviation spare parts".
Actually, this can be a trap for young players, as often auto/industrial grade bearings are too close tolerance ---- the OEM spares are actually out of standard tolerance rejects, when they are rejected because the "fit" is sloppy.

Some of you will remember some unfortunate accidents to a particular model of helicopter, because the manufacturer apparently ran out of "approved" bearings for a rotor, and fitted SAE standard bearings. In part, this is the story of the "dot" after the number on said bearings, denoting the out of tolerance rejects that have enough slop for the aeronautical application.

Tootle pip!!

Last edited by LeadSled; 16th June 2012 at 13:57.
LeadSled is offline  
Reply