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Old 06-14-2018, 06:15 AM
bob888 bob888 is offline
Join Date: Jul 2012
Location: Fresno, CA
Posts: 213
Default Alternator issue (overheating?)

I have the standard Vans provided Plane Power 60 amp internally regulated alternator. It has started having unstable voltage, up to 15.2 volts. This seems to happen when it gets hot; at the start of a flight, the voltage is low 14s but later gets up to the 14.9 - 15.1 range. I wonder if this is a cooling issue. The way the cowl is set up there is no provision for cooling air to reach the alternator. Have others had this problem? Solution?
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Old 06-14-2018, 07:43 AM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 1,844

Just a bad alternator. Repair or replace.

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Old 06-14-2018, 09:33 AM
Scott Hersha Scott Hersha is offline
Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 981

My PP alternator was outputting up to 16v at times and tripping the field circuit breaker - and itís new, still in phase 1. I sent it back to Hartzell engine technologies and they found a bad internal voltage regulator. They sent me a new one.
Cincinnati, OH/KHAO
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Old 06-15-2018, 07:30 AM
Bill.Peyton's Avatar
Bill.Peyton Bill.Peyton is offline
Join Date: Sep 2009
Location: St. Louis, MO
Posts: 1,662

Get rid of that PP alternator and you will never look back!
Bill Peyton
RV-10 - 890
First Flight Oct 2012
Aviation Partners, LLC
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Old 06-15-2018, 07:51 AM
Captain_John's Avatar
Captain_John Captain_John is offline
Join Date: Jan 2005
Location: KPYM
Posts: 2,622

Originally Posted by Bill.Peyton View Post
Get rid of that PP alternator and you will never look back!
Yup, they say the B and C alternators are pretty good!

RV-7 Flying - 1,000 Hours in 4 Years!
TMX-IO-360, G3i ignition & G3X with VP-X
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