mprather(at)spro.net
Guest
|
 Posted: Mon Mar 22, 2010 10:47 am Post subject: AeroElectric-List: |
 |
|
It's possible that rebuilder is putting crappy parts in the alternator,
and you got unlucky with which unit they gave you. Where are you buying
the alternators?
On this third alternator, did the system function okay once you returned
the unit to the airplane?
What is the indication of the failure? Do you have a low-voltage warning
light, or a voltmeter?
There are usually mutliple diodes in alternators. Often, only one of the
diodes fail, and this causes reduced output current, possibly only evident
when the system is seeing heavy loads - if the diode fails open, which is
common.
Is the mount and airflow (cowl) for this alternator essentially the same
as for other RV's? I wonder if it's getting adequate cooling? It would
be relatively cheap and easy to rig up some instrumentation so that you
could monitor the temperatures.
I see that you have 300 hours on the plane. How long ago did you start
having problems? Was anything else changed on the airplane?
Matt-
| Quote: |
<franz(at)lastfrontierheli.com>
Hi all,
I would like to ask your comments regarding a reoccurring problem that I
am
having in my RV7. I have wired it according to Z11 with the additional
projection for internally regulated ND alternator as suggested by the
connection. I have had now three alternator failures in short order, each
time I have taken out the alternator and had it checked out at the shop,
twice they found a faulty diode and the third time the alternator checked
out ok, no fault found. I have exchanged the alternator contactor and have
checked all wires and fuses, they all check out ok.
I am wondering how I could check the system to see if I can find any
problems with it. Any suggestions are appreciated
Franz
RV7A
300h
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
