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Wheels is thrilled AOC may make a run for president in 2024, but got so excited he posted in the wrong forum?

Only real way to know is measure consumption We did this sailing back from Europe Started running motor at 2400rpm at 8kts and burning over 10l/h In the Med Then crossing the Atlantic we ran at 2000 doing 7kts and burning 5.6l/h By the time we got to the pacific we were down to 1500 doing 6kts and burning 2.6l/h We would record engine hours and Ltrs every time we fill up. Tanks hold 500lts, So at 8kts can motor for 400nm but at 6kts we get to Fiji or 1150nm huge difference

I can't comment on your fuel consumption question, but definitely, if you are drawing 100 amps of your alternator when underway, you have less power available for propulsion. If you have the alternator engaged, but less draw on it, i.e. batteries full, or fridge turned off, you will have more power for propulsion. Probably only noticeable if you are trying to confirm max speed in flat water with a clean bum. Normally there are so many other variables you would never notice, like chop, wind direction etc. When we repowered we went to a fractionally smaller engine, and I was very keen

conservation of energy is the rule - you cannot make something out of nothing. you will use more fuel running at 1500 than at idle, and you will use more fuel running at 1500 with any load than at 1500 with no load.

It is not an easy question to accurately answer. It's like, how long is my piece of string and is it longer if I change the colour from blue to red, but what if the Blue has a green shade. The ruff rule of thumb is, that between no load and full load at the same RPM, there should be a difference of 20% in fuel used. This is because the Fuel is injected at a set dose per cylinder each time the Piston gets to the top of the bang stroke. As the load increases, the RPM will fall away and the governor opens to add a little extra fuel to give more bang and hopefully maintain the same RPM. The Fuel

Our off the grid diesel generator at 1500rpm uses around 0.9 litres/hr unloaded and about an extra 0.3 l/hr for every KW we draw of it - i'd expect a similar thing to happen to your consumption .no free lunches sadly applies to the humble volvo or in our case an LD20 also.

Agreed MH, it's a RORT! But it's section 1.5; 1.5 COMPLIANCE The requirements of this Standard shall be used in conjunction with, but do not take precedence over, statutory regulations that may apply in any area. Where no requirement is given, good practice shall apply. In a matter of uncertainty, advice should be sought. This Standard applies to new installations, alterations and extensions commenced after its publication date or the date of adoption by the relevant Technical Regulator. It does not apply retrospectively to existing installations, but any repairs or modif

I never make fun of anybody that got / gets into strife on the water - just seems like an invitation to karma of the wrong kind.