Originally Posted by daddle
9hp is one-third of 27hp no matter what kind of delusions one is under. The performance in adverse conditions will be readily apparent.
That is an apples to oranges comparison. Diesels are rated by peak horsepower at max RPM
, at idle you have ZERO horsepower, dont believe me try dumping your clutch
with ANY internal combustion engine at idle. Internal combustion engines power is determined by pressure of burning fuel multplied by square area of piston.
Electric motors do not "generate" any power, they merely convert one form of energy to another. They are rated by amount of heat they can dissipate at rated voltage. With cooling
and for short periods of time they can greatly exceed this. The horsepower they put out is just how much electricity did you put in?
I recently converted my car to electric, I replaced a 140HP gas engine, radiator, transmission, drive train, water
, starter, ... with a 10HP electric motor, and a controller. The performance and acceleration is the same...Range about half.
The advantages of electric, is the motor can always run at peak efficiency, the Diesel will only run efficiently at one RPM
. ANY form of power can be converted to electricity and stored in batteries, and used as needed.
The disadvantages??? Finding large amounts of electricity in the middle of the ocean. Batteries are large, heavy, and expensive. The added cost and complexity of a relatively new technology, ( instead of mechanic
, you need skills of electrical engineer).
The advantages, imediate quiet power whenever you want to move the boat. Flip a switch and you have thrust as long as the batteries hold out. Need a recharge, drop anchor and collect sun or wind
for a couple of days. Try recharging your diesel that way???
I ran out of "gas" in my electric the other day, I had to drop to 2 miles an hour to get home. Several people ridiculed me for not being able to instantly refill with gas, (I stated, "don't feel sorry for me, I'll get home in a few hours to recharge, feel sorry for the guy who has to walk 5 miles carrying an empty gas can")
Using electric for propulsion may not be for everyone, but if it was doable I would use it for everything I need.