Finally got to fly my new bird

Check the integrity of the alternator side of the master switch, the field
breaker and the field wiring. If anything has a high resistance, it can cause
this type of behavior. The master switch is a prime suspect.

mikem wrote:

Newer Cessnas have an OVP built into the same can as the VR. Older
ones didn't have an OVP. Since yours was field modified during the
engine conversion, the OVP could be a module separate from the VR, or
could be built into the VR. If adjustable, then the OVP should trip at
15.5 V. If it is tripping spuriously, then it might be time to replace
(or add) a filter capacitor across the wires where the OVP senses the
bus voltage.

MikeM

On Fri, 15 Aug 2003 15:53:26 -0400, "Wayne"
wrote:

Okay, I read what I could find. Well written by the way. I guess I need to
do a voltage check to see how high it is going when it shuts off. I would
think the regulator would take care of that and it's brand new. Is the OVP
inside the alternator or where? Asking that just in case it is cutting out
too low. Thanks
Wayne


--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759

The master switch only closes the master solenoid though right? This plane
doesn't have a separate switch for alternator. It's a 61 and had a generator
originally I believe. The fact that is goes out at high RPM makes me think
it is either over voltage, or a loose connection moving from the engine
vibration. Don't know though.
Wayne

"Ray Andraka" wrote in message
...
Check the integrity of the alternator side of the master switch, the field
breaker and the field wiring. If anything has a high resistance, it can
cause
this type of behavior. The master switch is a prime suspect.

Check your master switch from the back. Pipers have two poles on one actuator,
one is used to control the master relay, the other connects the alternator field
circuit to the buss. The side that handles the field circuit handles several
amperes, so the switches tend to get a bit cranky with age. It should show it
in the electrical schematic in your POH.

Wayne wrote:

The master switch only closes the master solenoid though right? This plane
doesn't have a separate switch for alternator. It's a 61 and had a generator
originally I believe. The fact that is goes out at high RPM makes me think
it is either over voltage, or a loose connection moving from the engine
vibration. Don't know though.
Wayne

"Ray Andraka" wrote in message
...
Check the integrity of the alternator side of the master switch, the field
breaker and the field wiring. If anything has a high resistance, it can
cause
this type of behavior. The master switch is a prime suspect.

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759

Will do, thanks.
Wayne
"Ray Andraka" wrote in message
...
Check your master switch from the back. Pipers have two poles on one
actuator,
one is used to control the master relay, the other connects the alternator
field
circuit to the buss. The side that handles the field circuit handles
several
amperes, so the switches tend to get a bit cranky with age. It should
show it
in the electrical schematic in your POH.

Wayne wrote:

The master switch only closes the master solenoid though right? This
plane
doesn't have a separate switch for alternator. It's a 61 and had a
generator
originally I believe. The fact that is goes out at high RPM makes me
think
it is either over voltage, or a loose connection moving from the engine
vibration. Don't know though.
Wayne

"Ray Andraka" wrote in message
...
Check the integrity of the alternator side of the master switch, the
field
breaker and the field wiring. If anything has a high resistance, it
can
cause
this type of behavior. The master switch is a prime suspect.

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759