Thanks Rick. I just wanted to clarify a question before I do a more detailed set of questions.

| > 1 a) At what RPM is the 18m props turning in the pics you attached?
|
| 500rpm
| > 1 b) What percent of rated max is that RPM?
| The rated speed on 50V is 700rpm, which gives 8.5kts. The existing controllers will cut out on regeneration at 60V (maximum allowable). That means regeneration is not possible above 10kts anyhow.

Let me clarify my question.
What is the absolute max RPM the MOTOR is rated for?
What voltage would be needed to drive it at this RPM?
What amperage?
What voltage and amperage would it generate if spun at that RPM?

'The existing controllers' are not all possible controllers, right? One could have a controller that handles these voltages for regeneration?