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S&S Swan General - Swan 38 no.96 propeller advice please |
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Join Date: 17 May 2022
Posts: 8 |
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Swan 38 no.96 propeller advice please Hi All So ‘Skylark' Swan 38, hull 96 (Ex Jacobite) is currently sporting a very fine 2 blade feathering prop that is absolutely fantastic when sailing and when not in use but quite honestly, no so good apart from straight line speed motoring forward where it performs well. Skylark has had a new gear box that doesn’t match the old (as not available any more) so less revs in astern. That said, ‘Skylark’s’ two blade prop has got me stumped! At best it’s the perfect prop for a race boat. This is a race boat, going into retirement without a full crew to jump on dock when life isn’t perfect. So, apart from the obvious slow transition between forward and astern and forgetting the 2 meter port side kick as soon as you go astern…. What am I missing? What do I need to learn? We do have a three blade equivalent that has come with the boat but I am looking FOR YOUR BEST ADVISE FOR MED MANOVERING PROPPELLER ETC. Quite simply, what is the best prop to have with friends and family onboard? so that i can control 8 tonnes with pride? (Like swaping out the furler for the tufluf for racing) Second question….. surly bow to the dock on this boat is easier that stern to (unless you have to use anchor obviously!) We need your advise! |
Join Date: 29 January 2007
Posts: 990 |
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Dear Ben, ![]() |
Join Date: 01 September 2007
Posts: 16 |
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Yes, Matteo, it needs a bit of experience and strong commands on the throttle.
The prop: SPW VARIPROP Drehflügelpropeller, Typ: GP107RH, 4-Blade, Ø 15“ = 381 mm, Steigung: voraus: 11“, rückwärts: 12“, Konus: 30 mm / 1:10 gem ISO 4566, Nute: 8 mm, Gewinde: M20x1,5, Länge der Nabe: 135 mm, Länge der Nabe plus Anode: 170 mm, Material: Nibral. Kontakt + information: www.spw-gmbh.de
Measurement: Distance: Propeller incl. anode — skeg: 160 mm, Distance: Propeller blades — hull: 9 mm (sounds narrow, but it´s OK!). Motor Speed 2000 U/min 5,5 knots 2100 U/min 5,7 2200 U/min 5,9 2300 U/min 6,1 2400 U/min 6,3 2500 U/min 6,5 2600 U/min 6,6 2700 U/min 6,9 2800 U/min 6,9 2900 U/min 7,1 3000 U/min 7,1 3100 U/min 7,2 3200 U/min 7,3 3300 U/min 7,5 Fuel consumption at 2.400 U/min: 2,0 Liters / hour Kind regards from Sweden, Klaus
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Join Date: 17 May 2022
Posts: 8 |
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Hi Matteo andf Klaus Thank you for your replies. I am not very good with engines as most / all my experience (Worked as professional racing crew / skipper) has been with saildrives on new race boats. We have just collected all the equipment from the previous owner and discovered that we have inherited a three blade prop. The Engine is a Bukh Prima 30 HP Diesel. What is involved with swapping the prop over. I imagine that the pitch needs to be reset or may be different as the gearbox has changed since this prob would last of been used? As I said, I have no experience on changing a prop so any advice on where I need to start with this is appreciated Many Thanks in Advance.
Ben ![]() prop |
Join Date: 29 January 2007
Posts: 990 |
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Dear Ben, |
Join Date: 06 February 2007
Posts: 51 |
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Hi, Ben, "toge" has got the same engine as you have and we have changed from a two blade prop to a three blade max prop some years ago (today we run a four blade SPW prop which to us is even better than the three blade max prop was). But the max prop you have got will do!!!! Get in contact wirh your local maxprop dealer. They are very helpful. They will ask you for some data to calculate the pitch. Then just mount it and be happy. Drive forward in good speed, stop the Bukh, wait half an hour before going reverse and come out in even better speed some meters more to port. Wait for a windy day, that will increase the fun! Best, Toni (toge, 38/113) |
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