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Old 07-06-2016, 08:22 PM   #41
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As to air conditioning on the loop. We are addicted to air conditioning, don't leave home without it. However, I see no problem doing the loop without it. The schedule most follow puts you in the perfect climates for the time of year and generally very moderate conditions.
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Old 07-07-2016, 02:07 AM   #42
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Originally Posted by devorenm View Post
There are some folks that have rigged up larger alternators and inverters to run an AC unit while underway without running the genset - however for most purposes you are just better off running the genset - unless you are putting on major hours underway you won't ever recoup the increased costs associated with the inverter/alternator/associated switching. Solar/Wind won't put out near enough juice for an AC unit.
OH MAN!!!!! Somebody gets it!!!! Listen to this guy!!!! I am absolutely baffled by the measures and expense that people will go through simply to avoid running a generator. A generator, when compared to wind/solar/batteries/inverter/controllers/regulators/etc is SO much simpler than all that other crap. And cheaper too!!!!!!
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Old 07-07-2016, 02:24 AM   #43
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OH MAN!!!!! Somebody gets it!!!! Listen to this guy!!!! I am absolutely baffled by the measures and expense that people will go through simply to avoid running a generator. A generator, when compared to wind/solar/batteries/inverter/controllers/regulators/etc is SO much simpler than all that other crap. And cheaper too!!!!!!
You are probably right for a boat used on some weekends and the occasional longer trip.
Different kettle of fish altogether for an actual live-aboard off the hook.
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Old 07-07-2016, 08:53 AM   #44
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When under way, I almost never run the gen and AC. Just open up the boat and it is comfortable even on a hot day. But sleeping on the hook in summer, man that AC is appreciated.
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Old 07-07-2016, 10:02 AM   #45
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Yep. More of a "maximum slow" than a target to shoot for.

Our example illustrates:
- 800 RPMs, 6.5 kts, 1.2 GPH, 2,93 NMPG
- 900 RPMs, 7.0 kts, 3.0 GPH, 2.35 NMPG
- 1200 RPMs, 8.9 kts, 5.8 GPH, 1.53 NMPG (approx. our theoretical max hull speed)

Not perfect comparison, since our hull form is different from FD, but makes the point I think.

-Chris
Chris, did you mean 6.5 knts @ 2.1 gph?
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Old 07-07-2016, 02:12 PM   #46
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Ah. Good catch. Thanks. Typo in my note 27, and copied again in #38. Should have read 800 RPMs, 6.5 kts, 2.2 GPH, and 2.93 NMPG.


And again, these are all taken from the published nominal fuel consumption curves compared to my bi-directional speed tests, not from on-board fuel flow instrumentation.


-Chris
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