electric shoboat cat

bob miller · Mar 21, 2010

a member of our club has electric proboat cat , blackjack , boat runs great until he uses full throtle , then it stops dead...out of the water , it will run full throtle , in the water at full throtle it dies....any idea why ?....thanks....bob

Kris Flynn · Mar 23, 2010

Bob,

Is he running too big of a prop?

Can he 'reset' the controller?

Maybe his battery packs are not able to put out much power at the top end, so the voltage drops and causes the controller to cut off

Chilli · Mar 23, 2010

Thats what I'm thinking. Tell him to check the speed controller settings for battery cutoff voltage. Is he using Lipo or Nimh?

bob miller · Mar 24, 2010

Kris Flynn said:
Bob,

Is he running too big of a prop?

Can he 'reset' the controller?

Maybe his battery packs are not able to put out much power at the top end, so the voltage drops and causes the controller to cut off

kris , he s using the prop that came with the boat , i'll check if he can reset the controller...he started having problems the second day out...the first time out the boat ran great...thanks for the advise....bob

bob miller · Mar 24, 2010

Chilli said:
Thats what I'm thinking. Tell him to check the speed controller settings for battery cutoff voltage. Is he using Lipo or Nimh?

chilli , he is using nimh, 7 cells , twin packs....thanks for the advise...bob

Chilli · Mar 24, 2010

The one of the advantages that Lipo's have over Nimh is they hold their voltage better when under load. Don't know what the default voltage cutoff setting is on the BJ controller, but I would guess that's where the problem lies.