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Rambler 
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Joined: 02 May 2010 Location: United States Status: Offline Points: 23 |
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 Posted: 21 August 2012 at 00:00 |
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Check out this website:
http://www.psychosnail.com/BoatSpeedCalculator.aspx The 400 has a static waterline length of 35.4 feet which will yield a displacement hull speed of 8 knots. But is the waterline length increasing as the boat is under way? It sure looks like it when you look at the stern. This website also has a correction for displacement/length ratio. I believe the DL ratio for the 400 is about 220 which yields a hull speed of over 9 knots. If you believe these formulas, why are we going so slow?
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Rhode Island, USA
Hanse 400, #456 |
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alanvkrasno
Lieutenant 
Joined: 21 February 2011 Location: United Kingdom Status: Offline Points: 23 |
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Posted: 22 November 2012 at 12:39 |
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On the subject of Propellers. I have a 3 blade Kiwi prop on a Hanse 400 and my best motoring ahead speed in flat water is 6.5 kn this seems slow according to recent reports from members. Astern or sailing its great. There has been wear seen where the blades hit the boss and its suggested I replace the blades. I am in a quandary about doing the work (as its only been installed 3 years) or going for a more durable Flexofold 3 blade prop. Any members have a view or should I just get the blades replaced this season. What pitch have other 400e owners had the Kiwi set to?
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bozzello
Lieutenant Commander 
Joined: 25 November 2005 Location: Italy Status: Offline Points: 54 |
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Posted: 26 November 2012 at 13:56 |
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Three year ago, I changed on my H370e my factory standard three blades flex-o-fold folding propeller with a three blades kiwi prop. (Yanmar 40HP engine, on SD50) I could’nt verify the engine speed ahead comparised to that with the previous prop, but my feeling is that the new propeller give the best performance on reverse. If somebody wants to change his fixed blades propeller with my flex-o-fold, I can sell it. Diego (diegoro@tiscali.it) |
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Diego
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alanvkrasno
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Joined: 21 February 2011 Location: United Kingdom Status: Offline Points: 23 |
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Posted: 26 November 2012 at 14:03 |
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I just wonder why you felt you wanted to change from the flexofold to the kiwi prop. I have decided to keep the kiwi at least for another year. I will let you know how I get on as it is having new blades fired.
Thank. Alan |
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kiwihanse
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Joined: 25 April 2011 Location: New Zealand Status: Offline Points: 49 |
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Posted: 27 November 2012 at 05:09 |
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Hi, I have a 2007 400e with a 40 hp yanmar and a standard 2 blade folding prop. I can get 6 knts @ 2000 rpm and 8knts @ 3000 rpm. Is there someone in the forum with a similar boat with a three blade Gori prop as the local dealer is adamant that is the way to go. Your thoughts and opinions would be appreciated.
Cheeers kiwihanse
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kiwihanse 400e Any two yachts heading in the same direction, then it's a race!
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davidef
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Joined: 28 August 2011 Location: Italy Status: Offline Points: 20 |
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Posted: 10 December 2012 at 06:11 |
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2600 rpm maximun rpm or cruising speed ???? The max rpm of engine are 3000 rpm, if you have 2600 m max your propeller is not correct and the engine is in over load.Please inform me the cruising and maximun speed including hthe rpm , because i want chage the prop wth flex. And i want verify the proposal of factory
Thank you |
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alettaenmarcel
Admiral 
Joined: 15 August 2006 Location: Netherlands Status: Offline Points: 1246 |
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Posted: 10 December 2012 at 14:31 |
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I think you will need a 18 x 13 inch propellor (two blade folding), I have it as well on my 370 with 39 HP Yanmar and it runns about 8,2 knots at 3000 rpm = max power greetings Marcel
Edited by alettaenmarcel - 10 December 2012 at 14:32 |
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Kids Dingys 72-79 ,Several Windsurfboards 79-86 OK dingy competitions 86-92 , Trotter Pandora Race 92-98, Friendship 28 Sport 98-05, Hanse 370 06-......
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bozzello
Lieutenant Commander
Joined: 25 November 2005 Location: Italy Status: Offline Points: 54 |
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Posted: 01 February 2013 at 13:18 |
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Because of other boat expenses (I changed my whole old battery package at the end of 2012 year) I decided to sell my H370 factory standard three blades flex-o-fold folding propeller, four seasons used, in excellent conditions, with a new anode. My request is EUR 800 (USD 1080 about), delivery costs included. Send a message to diegoro@tiscali.it
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Diego
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StephenDadour
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Joined: 22 April 2011 Status: Offline Points: 48 |
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Posted: 04 February 2013 at 05:22 |
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Hi, I have a 2 blade folding and when we feather it it makes a huge difference to the drag on the boat.
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