Horses for Courses, indeed.
If you can hear your electric motor or drive train while trailing prop, something is wrong. Mine is utterly silent with no power applied.
With a motor designed for low speed, direct drive operation, certainly direct drive is more efficient. Such motors are quite expensive though, compared to my $375 ME0201014201, though. For most motors, a thrust bearing is needed, anyway. So much for simplicity. My fully enclosed gearbox bolts right up to a C face mounting plate, and the motor bolts right up to the gearbox with a key to lock the motor shaft into the input. Darn near as simple as direct drive, even with an integrated thrust bearing in the direct drive motor. Gearbox and motor together are still pretty cheap. Don't remember but I think I paid $400 for the gearbox.
Agreed... chasing regen is hardly worth the effort until you get into boats that are capable of double digit speeds under sail. For under 30' boats, it should not be a major design consideration at the expense of higher priorities.
I hate alcohol stoves, though. I tossed mine when I bought the boat. Don't use propane, either, except in the Magma kettle grill on the pushpit rail. I prefer kerosene or diesel in my Primus. YMMV. But a majority of small boat sailors use propane, and gasoline portable generators are common on electric boats, and even gasoline outboards can be found on some e-boats. If a person can do without propane or gasoline onboard, then yeah, no particular safety reasons not to go brushed. You forgot the most important thing in favor of brushed motors, though. If your controller goes up in smoke, you can in an emergency hook your motor directly to the bank to get home on.Can't do that with brushless motors. Yes, I know a set of brushes can last a long time, but I was not aware that brushed motors were inherently more efficient than BLDC. Could you elaborate on this? Because my understanding is that a PMAC/BLDC motor is more efficient, by a small margin. I am not a professional electrical engineer so I will not go out on a limb and state this for a fact, but this is what I have been lead to believe, so if you know for a fact the brushed motors are more efficient than BLDC, please do explain how this is so.
I did point out that Lithium has many advantages over lead. However, as a purely auxilliary installation, with limited range requirements, issues like depth of discharge, energy density, and such, are not as important. Worth considering, yes, but for those of us who need to keep the initial cost down, lead is still king. NO WAY I could have bought a LiFePO4 bank of the same capability for the $680 I paid for my golf cart batteries. Lead isn't for everyone but neither is lithium.
TBH, if I had an unlimited budget, I would go with Edison cells. I kinda like the idea of a battery that can last 100 years.
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