Originally Posted by tomfl
Going from here to there does not seem to be a real issue.
But I wonder how one backs down on an anchor
. I seem to spend more time running my engines doing that than actually going somewhere.
That is a problem, given how anchorages
are ideally windless, and often are when we arrive (fickle as they do be !).
I'm currently designing a hydraulic prop drive, with accumulators to store hydraulic power (which can be generated by repitching the prop and backdriving the hydraulic motor
as a pump) for such purposes. Also for running a windlass
, and raising the keel
is intended to have a couple of small diesels, a single
cyl 1GM10 Yanmar
and a two cylinder of the same design (so spares can be shared - or, in extremis, one engine
cannibalised temporarily to keep the other running)
will be coupled to a (very quiet!) hydraulic pump, so that, depending on requirement, there's a full-load choice of (nominally) 10, 20 or 30 hp, without incurring the inefficiency and corrosion
which comes from running a marine diesel
For finer modulation, any surplus can be channelled back to the accumulators - whose charging
rate is limited only by what's available, on top of which they retain their charge indefinitely.
For short bursts, like repositioning on a wave when making a difficult harbour entry, there will be up to 60hp available at the prop -- for very short bursts, without even firing up a diesel
I'm not against engines, but I like them to be used in optimal ways, and it just doesn't make sense to me to cart around a big engine on a boat which sails
And rightly or wrongly, some of the "moral hazard" of having lots of power on tap is less worrying to me if it's a limited duration option. I'm thinking of gradual loss of emergency
skills - not necessarily loss of execution skills (because they can only be kept up by having emergencies, which does not appeal), but loss of pre-emptive planning and imaginative visualisation skills.
(eg: How would I get out of the current
predicament if the prop dinged a blade?)
And, on a boat which relies on an engine, the redundancy of two small ones has some appeal, if going off the beaten track for extended periods.
- - - -
As for the difficulties of setting anchors with NO engine: if bad weather
is expected, I would row out a Fortress
or similar stern anchor and take it to a cockpit winch
. I've even used a dinghy
anchor to set the main anchor on a small sailboat.