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Passage Planning speeds |
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Matt1
Rear Admiral Joined: 10 March 2019 Location: Hamble, UK Status: Offline Points: 664 |
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Posted: 15 May 2019 at 06:52 |
Hi
I realise it's like asking how long is a piece of string, with a huge number of variables, but what are fellow 415/418 owners using by way of a passage planning speed? 1) Under power 2) Under sail Thanks Matt |
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415 Singapore
Vice Admiral Joined: 23 September 2013 Location: Singapore Status: Offline Points: 826 |
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Hi, as you say how long is a piece of string! For longer passages when we want to get somewhere reasonably quickly we work on 7 knots, but in SE Asia that can involve quite a lot of motor sailing.
On a 560 nautical mile trip from Singapore to Phuket we averaged 7.3 knots with first two days motor sailing and last two sailing in a good 15-20 knot breeze. Even in the lightest wind the main will help both steady the boat and the speed. If it works use the jib or even gennaker. We have found 7 knots under engine to be reasonably economical on the fuel. All the best Paul
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Paul - Night Train - 415 #136
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High Time
Vice Admiral Joined: 04 September 2012 Location: Portsmouth UK Status: Offline Points: 798 |
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Hi Matt
For cross channel and northern France passages I use 6 knots for sailing cross tide or 7/8 if down tide, especially in CIs and northern France. I usually beat the 6 knot plan, but better to be early for a gate/lock than too late! 'Conservative' passage planning avoids hard motoring to reach a destination on time For motor sailing, I agree that 7 knots is good.
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Roger
High Time (415 #038) |
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Matt1
Rear Admiral Joined: 10 March 2019 Location: Hamble, UK Status: Offline Points: 664 |
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Thanks everyone - very useful
Matt
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High Time
Vice Admiral Joined: 04 September 2012 Location: Portsmouth UK Status: Offline Points: 798 |
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No problem.
BTW - it's helpful (and interesting) to others if you include a couple of details about your boat after your signature. See the examples above from Paul and myself if you're not sure what to include. Thanks Roger
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Roger
High Time (415 #038) |
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Simon L
Lieutenant Joined: 19 May 2016 Status: Offline Points: 40 |
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What revs do people motor at (I have the 40hp engine, so I guess I'm asking people with the same engine). I don't think I motor at the speeds some are suggesting here - perhaps 6 knots.
I passage plan at 6.3, and usually that comes out about right, with a mix of sailing, m/s and motoring. Generally push around at 2,500 revs, up at 3,000 if I'm trying to beat a tidal gate. |
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Mark_J1
Rear Admiral Joined: 12 March 2013 Location: Dover&Medway UK Status: Offline Points: 526 |
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On a Yanmar 3JH4E 39hp and a featherstreeam prop: 1800 rpm for optimum fuel burn v speed. 2400 rpm when against tide and wind and late for the lock (& pub!). 2800 rpm on the run to the fuel berth to clear the cobwebs from the engine.
My passage planning (on a 400e) assumes 5kts +/- tidal stream. We often beat that by a mile, but it allows for contingency and a the choice to sail or motor. Worth mentioning that rev's v speed depends on lot on the choice of prop (& it's settings) and the amount of cruising gear onboard. Mark
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Hanse 400e "Grey Goose" Hull #31
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Fendant
Admiral Joined: 03 November 2012 Location: Switzerland Status: Offline Points: 1617 |
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I am running my D1-30 at 2200 rpm, this is the most economical fuel burn according the Volvo diagrams.
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Frank
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