Comentarii la: Cea mai TRĂDĂRĂ durata a ICW | Înțelepciunea navigată [S5 Ep38]

De: Gone Swimming

Gone Swimming — Wed, 30 Nov 2022 11:19:23 +0000

Great video! Crossing the border into North Carolina …. Do you need a passport for that? Hahahaha (just a little eastern shore humor). Great info on Diesel to KWH. I have been watching the progress on the electric outboards and they have made a lot of improvements over the years.

De: Tim8mit

Tim8mit — Tue, 29 Nov 2022 23:53:58 +0000

Herbie you didn't calculate idle time and warm up time…..other cruisers have said they get 1 hour of motor time for 3/4 of a gallon of diesel and as bad as 1 gallon per hour

De: Mark Mahan

Mark Mahan — Tue, 29 Nov 2022 21:37:51 +0000

Myrtle Beach, UGH!

De: Edward Finn

Edward Finn — Tue, 29 Nov 2022 14:20:55 +0000

Thanks for getting back to me, and being so ‘open minded ‘ , that’s a very good character trait.
Anyway.
As you asked , here are my own numbers.
I have a Yanmar 30 hp , 3 HM 35F.. the boat is an IP 35 with a published weight of 17500 lb.
When cruising at 6 knots and 2400 rpm , I burn 3 litres per hour or 2 nautical miles per litre.
So with 14.2 usgal of diesel I would have motored 102 nautical miles.
I’m sure you know that the efficiency of the boat is dependent on speed, I think it’s a quadratic relationship…
So if I had patience enough to tolerate 3 miles per hour my mileage would have doubled or quadrupled…
Moving on, your electric outboard numbers sound great.

De: Edward Finn

Edward Finn — Tue, 29 Nov 2022 05:07:15 +0000

I think you are applying the efficiency of a diesel, backwards.
Engines are rated in kw/ hp per gallon of diesel…
The efficiency is already in there…

De: Rob Evans

Rob Evans — Mon, 28 Nov 2022 23:30:24 +0000

Myrtle Beach turned their fate over to the high-rise condo developers decades ago. My wife and I used to vacation there in the 70s & 80s, but couldn't stand it after that.

De: Melinda

Melinda — Mon, 28 Nov 2022 05:27:44 +0000

Beautiful houses, looks calm.

De: Robert VanderPol II

Robert VanderPol II — Mon, 28 Nov 2022 05:01:38 +0000

It happens that I am currently researching the fuel efficiency of Internal Combustion Engines (ICE) used in boats. The very best tractor engines currently just barely get 20hp-hr/gal of diesel. The engine that was originally on this boat was probably a 1970s or earlier vintage engine of about 40-45hp and the peak efficiency was maybe about 15hp-hr/gal at full load. As load decreases, so does efficiency, but since total drag on a sail boat is decreasing faster than efficiency, MPG still goes up until somewhere around 3kt.
The larger the engine, the faster the fuel economy decreases, so that by time you get to about 15hp a 30hp engine has better fuel economy than a 45hp engine, the 30hp would be getting about 10-11hp-hr/gal vs about 8hp-hr/gal for the 45hp engine. As noted in previous videos the Morgan 45 uses about 5kw to maintain 5kt, that's about 6.7hp.
Assuming 10hp-hr/gal, that's 7.46kWhr/gal. At about 00:44 into this video Herb indicated the Morgan used 580kWh. So 5870kWhr / 7.46kWhr/gal = 77.75gal. My guess is that fuel usage would be closer to 100gal for that period.

What was the original engine in the boat?

The info for outboards is a little sparser. 2.3-9.9hp outboards get 9.5-11.5hp-hr/gal at full throttle. Tractor data indicates gas/petrol fuel economy also falls as the motor is throttled to lower power. At about 01:20 Herb indicates the dinghy used 36.5kWhr. Assuming that they had a very small 2.3-3.5hp ICE outboard (similar output to their electric outboard) and they ran it near full throttle and got 10 hp-hr/gal they would have used about 4.9gal of gas/petrol. In reality they probably would not have run the engines near max, anything over about 1.5hp of propulsion effort just makes more noise and a bigger bow wave for minimal increase in speed unless you have a very heavy load in the dinghy or you have enough HP to get on a plane. I suspect that gas/petrol use would have been closer to 10gal.

De: bruce kuijpers

bruce kuijpers — Mon, 28 Nov 2022 00:26:03 +0000

Profanity is not befitting you.

De: AU Prospector

AU Prospector — Sun, 27 Nov 2022 23:23:41 +0000

Great info!