Before trying our ground testing automobile voltage regulator (recommended from previous posts) I have carried out some trouble shooting tests as suggested by Zeftronics .
They advise the generator armature to ground resistance should be no more that 0.1 ohms but my reading is 20 to 40 ohms depending on commutator position ( moved by turning prop) and the genertor field to ground resistance between 7-10 ohms and I get 27 ohms.
The only value I get within there spec is the generator field to armature resistance of 8 ohms they suggest 7-10 ohms.
Does anyone know if our values are suggesting a fault or could they be considered in spec ?
Many Thanks
Bryce
Generator Resistances
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
On receiving a replacement generator from Aerotech of Louisville I have measured the armature to ground resistance of 0.3 ohm and the field to ground resistance of 7 ohm.
This appears to be more in line with what should be expected and hopefully this has been part of our problem.
We have taken the opportunity of obtaining a 35 amp generator to replace the previous 20 amp unit and at the same time a 35 amp voltage regulator.Aerotech were helpful in trading in our smaller generator.
Bryce
This appears to be more in line with what should be expected and hopefully this has been part of our problem.
We have taken the opportunity of obtaining a 35 amp generator to replace the previous 20 amp unit and at the same time a 35 amp voltage regulator.Aerotech were helpful in trading in our smaller generator.
Bryce
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Bruce Fenstermacher
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- Joined: Tue Apr 23, 2002 11:24 am
Bryce
I hope you have a dampened crank engine otherwise you can't legally put the 35 amp generator on.
See other threads here on how to determine if you have a dampened crank or not if you don't already know.
I hope you have a dampened crank engine otherwise you can't legally put the 35 amp generator on.
See other threads here on how to determine if you have a dampened crank or not if you don't already know.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Thanks
For some unknown reason the aeroplane had been fitted with a 20 amp generator at sometime as a replacement to the 35 amp unit originally fitted and there is already a cooling hose.I have read a little on dampened cranks but ours has a Rolls Royce constructed engine and I am not sure this problem extended to these licensed buit Continentals.
Bryce
For some unknown reason the aeroplane had been fitted with a 20 amp generator at sometime as a replacement to the 35 amp unit originally fitted and there is already a cooling hose.I have read a little on dampened cranks but ours has a Rolls Royce constructed engine and I am not sure this problem extended to these licensed buit Continentals.
Bryce