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drive questions.
#1
Bought a used octopus  1212lar12 for my Pearson 323. 32 feet and about 13,000 pounds.
Very overkill, on bench looks good so far.
https://octopusdrives.com/products/hydra...ar-drives/
No load current is 3 amps.
They claim 4-6 amp and normal usage. 12 amps at max rated thrust and 19amps stalled.

This is on the high side for the Sean's motor controller I have.
I'm thinking of repackaging, adding heat sinks and clutch.

Is there an optimum no load hard over time?
I doubt if light weather load will change much from no load.
Pump is adjustable and can be pretty fast.
They specify a 10" tiller arm and I'm thinking of shortening a little, probably 9"  to save a little rudder movement when docking.
That will make it a little faster.

Does it make sense to make fast as possible and  pwm  motor if needed.?

John
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#2
yes, faster is better, but there is a slight efficiency switching loss in pwm, so running full speed maybe gives 5-10% more efficiency, but whatever.


hard over time of 6 seconds would be good, prefer no longer than 10. If you can get it down to 3-4 seconds, let us know all about it! Faster basically means you can deal with more difficult conditions, but there is likely an optimal speed for efficiency too, so the ideal drive could actually change the distance it engages from the rudder shaft to minimize power consumption, but no one actually does this... few people have variable pitch propellers either.
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