Mark,
You have looking at the marketing with a clear eye. It is a 1kW motor and it performance is based on that power coupled with a very efficient propeller. I sell the Torqeedo 1003 and consider it a good dinghy motor. Once you put it on a displacement hull you will be impacted by the sea state and will see its true limitations. It is 1.5hp motor at best. I.5 hp will push a small boat at slow speed but not through a rising sea as both its power level is low and the propeller, which provides much of it performance, seems to not perform as well.
The simplicity of the gasor propane outboards is when the say it is a 5hp or 9.9hp, it actually is as it is a full motor system measured at the propeller. Torqeedo uses "marketing terms" that are different than the rest of the outboard industry. The same happens when you look at an inboard diesel, it is measured as b (break) hp which is really not very transferable to marine propulsion. On top of that, the parasitic character of the transmission, alternator, pumps (all not measured in bhp, will take as much as 25% of the power away from the smallest diesel to 10% for away from the larger diesel.
Reading motor data and then evaluating true results from users is the only way to understand what works and what does not.
Mike
Electric Yachts of Southern California
Posted by: mike@electricyachtssocal.com
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