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Post by electricmonk on Aug 27, 2014 16:26:10 GMT
I fitted a 3 blade maxprop to my SO37 and wasn't impressed and its a very complicated device with needs, my SO43 has a Volvo 3 blade folder, it works very well and has never failed to deploy, ahead or astern. I get no gearbox rotation underway but best of all its a really simple mechanism, in 10 years on the boat all I do is clean it - occasionally (it doesn't even have an anode). In my opinion folders are better than featherers for this reason alone - fit and forget.
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Post by ianpowolny on Aug 29, 2014 20:51:44 GMT
I got a quote from Autostream. Too expensive for our boat!
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Post by optimystic on Aug 30, 2014 1:25:54 GMT
I am awaiting final details but believe I will opt for the three blade flexofold and put the funds saved verses the max-prop toward a line cutter and a couple years worth of zink. I hope to get this done in September.
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Post by optimystic on Sept 1, 2014 21:01:56 GMT
Does anyone have experience with the shaft shark? It looks like a good option. I like the scissors design from rope stripper but it involves custom zinks and a mod to the prop hub both of which I prefer to avoid.
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Post by abgreenbank on Sept 1, 2014 21:41:36 GMT
I recently fitted a 3 blade flexfold to my new 50ds, jeanneau wanted 4000 euros plus taxes, ordered direct from flexfold in Denmark for £1575 plus taxes. Took 30 minutes to fit, and I have a spare prop. cant comment if it's any better than standard prop as it hasn't been in the water but in flatish water 7.5 kts at 2250rpm and 9 plus kts at 3100 rpm, hardly any prop walk. to make it fold just select rev for second then neutral and all the gearbox noise disappears from the sd60 saildrive. so far very impressed.
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Post by abgreenbank on Sept 1, 2014 21:44:27 GMT
Forgot to mention the only possible downside is so far the only rope cutter I have found involves removing part of the saildrive to install it, so haven't gone there.
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Post by Spritz on Sept 2, 2014 6:28:57 GMT
Dear you wrote: I recently fitted a 3 blade flexfold to my new 50ds, jeanneau wanted 4000 euros plus taxes, ordered direct from flexfold in Denmark for £1575 plus taxes. Took 30 minutes to fit, and I have a spare prop. cant comment if it's any better than standard prop as it hasn't been in the water but in flatish water 7.5 kts at 2250rpm and 9 plus kts at 3100 rpm, hardly any prop walk. to make it fold just select rev for second then neutral and all the gearbox noise disappears from the sd60 saildrive. so far very impressed.
Well I have several questions: which engine you have? Which sail drive? You wrote SD50 and then SD60. which measurements has the propeller you brought . Which type of boat you have?
thank you, I am thinking to take a Flexofold ...... And I am acquiring information to be sure of my choice.
thank you
spritz
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Post by MalcolmP on Sept 2, 2014 8:01:16 GMT
For the sake of completeness there was quite a lot of previous views on folding props also on these threads: jeanneau.proboards.com/thread/2446/folding-propjeanneau.proboards.com/thread/1900Whilst I may be accused of being biased as I work with the company, I personally have had a 3 blade autprop on my 39i with a 39hp Yanmar for six seasons and it has been brilliant - low drag, reduced fuel consumption or lower revs, great power ahead and reverse, less and more controllable propwalk and finally very efficient when motor sailing with low revs. It is also easy to service and has no complicated parts to replace www.autoprop.infoI will be on the Bruntons stand G110 at the Southampton Boat Show from the 12th to 16th Sept, would be great to meet with any Jeanneau owners if you are going (I promise I wont try to sell you anything...) Malcolm
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Post by abgreenbank on Sept 2, 2014 14:32:57 GMT
The boat is a SO 50DS 2014 with a yanmar 4jh4 te 75 hp engine and a sd60 saildrive, the new one with the horizontal clutch plate rather than the sd50 which has cones.
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Post by abgreenbank on Sept 2, 2014 14:36:00 GMT
I just asked flexfold for the same prop supplied to Jeanneau, I seem to remember it was a different diameter to the standard fixed blade prop.
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Post by Spritz on Apr 14, 2015 23:04:17 GMT
Just brought an AUTOPROP APS-H5-485 for my sail drive SD 50. i have a 2011 42DS.
well these are the results: against 20 knots of wind and 70 cm of waves: 2000 rpm 7.8 kn 2400 rpm 8.0 kn 2600 rpm 8.2 kn 2750 rpm (my cruising rpm) 8,3 km 3000 rpm ( Max) 8.7
In favour of sea and wind (12-14 kn) 2600 rpm 8.5 kn 2750 rpm 8.6-8.7 kn 3000 rpm 8.9-9.1 kn
i am quite satisfied I did not loose speed under engine, I gained under sail. in particular I gained a lot in reverse because I lost the "propeller evolution effect".
i am curious to see what will happen when the hull will be dirty.
krs
a
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Post by vasko on Apr 15, 2015 11:43:56 GMT
7.8 kn on 2000 ? how much you are doing on Idle ? e.g. looks toooo fast to me.. e.g. how you manage to move slowly inside confine spaces e.g. in the marina ?
looks to me like 3-3.2kn on idle - 850rpm ?
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Post by alex1949 on Apr 15, 2015 15:49:34 GMT
Hi Optimistic, On my SO40 DS I opted to the NZ feathering Kiwi 3 blades. For your 40 HP it will be the lowest price . Very pleased with reverse thrust and sailing performance with a low drug. Price is almost half of all the other suggested props.(1500$ delivered) They have a very good after service. Happy to make decision even more complicated. Alex
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Post by hoppy on Apr 15, 2015 16:27:49 GMT
Just brought an AUTOPROP APS-H5-485 for my sail drive SD 50. i have a 2011 42DS. well these are the results: against 20 knots of wind and 70 cm of waves: 2000 rpm 7.8 kn 2400 rpm 8.0 kn 2600 rpm 8.2 kn 2750 rpm (my cruising rpm) 8,3 km 3000 rpm ( Max) 8.7 In favour of sea and wind (12-14 kn) 2600 rpm 8.5 kn 2750 rpm 8.6-8.7 kn 3000 rpm 8.9-9.1 kn i am quite satisfied I did not loose speed under engine, I gained under sail. in particular I gained a lot in reverse because I lost the "propeller evolution effect". i am curious to see what will happen when the hull will be dirty. krs a Those figures look a bit extreme. My boat is only 2ft less and has 56hp (have you 54hp?) but I only get 6knts at 2000 and 7.9knts at 3000 in windless conditions and flat seas. I wonder if your speed log is reading a bit high? I think I had calibrated my log to the GPS before I got my figures.
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Post by vasko on Apr 15, 2015 17:11:59 GMT
to be fair - I remember that when I had Bavaria 40 with 3 bladed fix prop she was going ( 55HP Volvo) 4kn with 1200rpm on completely flat water maxing the speed to about 7.8/8kn around 3000 rpm
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Post by ForGrinsToo on Apr 15, 2015 17:51:13 GMT
I am also considering a folding 3-blade, and rely on Practical Sailor a lot for relatively objective evaluations. Unfortunately, they haven't done a prop test in quite some time (from 2010):
We haven’t held a head-to-head test of props since the mid-90s, but those tests and reports offer some great information on the type of performance you can expect from different style props, including two-bladed and three-bladed feathering props. Test products included props from Michigan Wheel, Campbell Sailer, Martec, Autoprop, and Max-Prop. The in-depth tests were conducted at the Massachusetts Institute of Technology and were reported on in the Oct. 1, 1993 and Jan. 1, 1995 issues.
When selecting the best prop for your boat, determining the correct diameter and pitch is 98 percent of the battle. Other important factors to consider are what type of sailing you do, where you keep the boat, etc.
In the MIT tests, we found that as far as feathering/folding props, Martec and Gori had high efficiency ratings but lackluster performance in reverse, and the Gori was quite pricey. Max-Props feathering props had low drag and good reverse performance but not great efficiency in forward. Max-Props is frequently cited by readers for their good customer support.
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Post by vasko on Apr 15, 2015 18:49:34 GMT
I've ordered my new one two weeks ago and as usual the price won over the quality - I decided to go for 17x13 2B Radice folding found it new for <600 EUR in a German online shop (about twice cheaper compared to UK) The calculation were for 16x12 but I've decide to go for a bigger one - will have it with me mid May and will report what is the result....
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Post by ianpowolny on Apr 15, 2015 19:20:05 GMT
Darglow Featherstream fitted this season.
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Post by Spritz on Apr 15, 2015 23:37:26 GMT
Dear all, i have a 54 hp from YANMAR with SD 50 sail drive
the speed I wrote are taken from 2 GPS 1 Raymarine and one Geonav independent.
Are very similar (just a bit better) than the 3 fix blades propeller I had.
during evolution in the marina, no problem at all.
is in Italian but the sense is easily understandable: Krs
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Post by optimystic on Apr 17, 2015 15:01:39 GMT
I just added the flexifold 3 blade and am impressed with both sailing and motoring improvements. We really like the change from standard fixed.
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