Yah, another project is just what I need... It would help my carbon footprint for sure, since I would be home building boats instead of burning fuel!
Since we are on the topic, one of my present shop projects could be called Renewable Energy. I seem to accumulate a butt load of waterlogged gear, engine and tranny oil during hurricane season (or is it hunting season
), plus all the used frog cooking oil. I am looking to renew that into AC and a working oven for the missues when FPL fails.
I have a barely used 3 cylinder, mechanical Yanmar diesel that I picked up for a song a year ago and a just received today 16.5 kW alternator head to form the basis of my hybrid household power system. When this is done, the electric airboat pits had best be within trailer haulin range, because I ain't loading it in one of my boats.
Some figures to consider:
1 Hp = 3/4 kW (1.33 Hp to a kW)
1 kWh = 1 kW solid for 1 hour
A really good 12V lead acid deep cycle trolling motor battery provides 1.4 kWh of storage
I find Tesla Model 3 at 211 kW = 280 hp. The huge advantage of electric is an almost flat torque curve, so the boat will jump off the line, unless it loaded down with 2,000 lbs of battery. That's output power, assume 80% drive train efficiency and the Tesla draws 265 kW electric input at WOT. Run WOT for 5 minutes, 265*(5/60) = 22 kWh energy. So that is 16 deep cycle batteries to run 5 minutes, a bit less than 1,000 lbs in lead acid, call it 300 lbs in hot rod lithium/super cap form.
Now, back to power vs. energy, my new genset will make say 15 kW continuous, I'm gonna need a 1-1/2 hour pit stop to recharge the 22 kWh for another 5 minute blast.
As for solar, covering the boat in panels will be about right to run an on-board beer fridge, but won't make a dent in another 5 minute blast. By the next morning, the fridge will be dead and the last beer will be warm (or gone) and the damn prop still won't turn.
Solar Airboat = beer cooler you can drag through the swamp. Eventually it will run out of beer and you will leave it behind.