EWOL propeller great assistance and reliability

[Spritz]

dear all I write this to let you all know the reliability of a small Italian Propeller producer

in February a friend  of mine and me brought 2 EWOL propeller for our boats

my friend has a sun odissey 42.0 with a Yanmar 54 Hp and a traditional transmission, he mounted the ewol propeller he found immediately the correct pitch and the boat gained almost 1 knot under engine and quite 1 knot under sail, moreover he gainedin manoeuvrability   particularly in reverse  gear and the boat stops immediately. He is very happy!

I have a 42 DS with a Yanmar 54 hp with sail drive. I mounted the propeller and I lost 0.5 knots under engine and probably gained 0.3-0.5 under sail. since the transfers are made (in my case) under engine I was not happy so I called the EWOL and they suggested me some changes in the pitch but these changes did not give me good improvements. so we analysed the problem and we found that my sail drive causes some cavitation on the propeller blades, for this reason I mounted again the fixed propeller.

I called the EWOL again to update them and told them that I was unhappy about the results and they replayed: please send us back the propeller and we will reimburse you!

Today I have the confirmation of the reimbursement!

I write this because I want that everyone knows the reliability and tre great assistance given from EWOL company!
KRS

[frankcilo]

Even my brother and I bought Ewol and we were not satisfied, the manager kept minimizing saying that no one had ever complained, gave us a thousand tests, changed diameter and fells with more Dar, but in the end it was over Over a year and we can no longer return it, money thrown! These turntable blades have too flat blades that do not push, especially against wind and waves, losing more than 1 knot of speed over a fixed prop

[vasko]

Get a elice - radice one very happy with it especially the price and over prop it compared to fixed with one number in diameter and angle

[frankcilo]

Now I have just installed Autoprop, and finally a really incredible propeller, I have gained almost a knot and in the opposite wind and sea conditions push the boat always at higher speeds. Zero vibration and very easy to mount in water

[frankcilo]

I own a Sun Odyssey 33i with 21hp engine. I had a 3-bladed propeller blade with which I could take all 3600 engine speeds with a 7.5-knot nozzle speed even with a slightly dirty hull. I decided to install a propeller that would give me more sailing speed, and after so many studies I was undecided between Autoprop and Ewol. Eventually I chose Ewol because I was afraid that Autoprop was too complicated. I first mounted a Ewol with a diameter of 15.5, but I was not satisfied, too much cavitation and a little push, then I asked to replace it with a 17 ", paying the difference (Ewol's owner claimed I was the first customer complaining) , Things have improved, but I continue to make half a knot less the maximum speed and when the weather conditions deteriorated, the propeller did not push well, I tried to adjust the pace in all ways, but nothing to do! After a year , I decide to go to Autoprop, and then here's my full test, starting from a test with fairly dirty hull (but with log 100% cleaned and fixed), I did not want to clean it before the test. First tested the Ewol to make a comparison at the same conditions, and at 2500 rpm it took 5.5 knots of speed while clutch could not exceed 6 knots at 3000/3200 rpm (the pitch is set to take 3200 rpm).
Mounted the Autoprop without even using a bottle, all in apnea, I immediately sailed to start the test, the sea in the meantime began to increase due to the intense libeccio, graft the gear and feel a tougher tap than the Ewol, I understand from various subsequent tests that he does not always do so, depends on how the blades are all set apart. Start to accelerate and all smooth without vibration, the acceleration is progressive and, giving the handle, up to 3600 rpm with a speed of 6.5 knots. At 2500 rpm (maximum torque and cruising speeds) the speed stops at 6 knots, rewinds to the handle and rises to 6.6 to 3400 rpm this time, indicating that the propeller has had to reduce the pitch for more favorable marine conditions at that time (and the tenth most node testifies).
Here's the video of this first comparison:

I clean the hull well, which was really dirty, and text the Autoprop, the current is around the node, so I try at various angles to get a real result, and this time I solved the gps problem that did not work before: speed the maximum reached 7.6 of log and 7.8 of the current with crossover current, the maximum number of engine speed this time is 3200 rpm, a sign that the clean hull really brakes less and the propeller does not need to take all the engine speed (but I do not rule out that it will take them when there are unfavorable sea conditions); The hull speed is still reached smoothly!
Here's the video of the latter test:


Finally I sailed it, I was curious to see how the blades were to be oriented, and I tested that even by turning the engine off in neutral, the propeller stops rotating and the blades are pointing to the flag, however, making it unnecessary to engage the march. No visual turbulence at 7 knots the speeds, so I would say this test too good!

Here's the video:

In maneuver the evolutionary effect seemed to have disappeared, but in reality there is still fortunately, less but there is and for me it's a good thing because in the maneuvers it can be useful.

For long motor transfers just place the throttle lever to the maximum torque speed to get the best ratio between fuel consumption and boat speed without creating unburned deposits that will ruin the engine, the rest will think Autoprop to adjust the continuous pitch if the sea conditions should vary, making you always achieve the highest speed!

This is really the propeller that everyone should have on their own cruise ship

[Spritz]

Dear Frankcilo
happy to read your report!
This report demonstrates that you are smart, only smart people change ideas! And make their own ideas instead of only listening their friends

This even if one year ago you were telling me that mine were wrong impressions and that the surface of Autoprop could not drive to such results!

NOW you tested it’s performance directly ON YOUR SKIN!
I am very happy about this but, please NEVER tell me: “I was not aware”…

Nice sailing

jeanneau.proboards.com/thread/3302/folding-prop-recommendations?page=2

[frankcilo]

Ciao Antonio, in fact I did not say this, I always believed that Autoprop was genius and worked fine, my fears were on engine effort and on major vibrations in the case of dirty helix, but in the end I realized that they were just rumors of competititors, I wanted to test with hand despite having spent so much money for buying Ewol, and in the end I did fine to touch with the hand, because this Autoprop is really the best propeller that can fit a cruise sailboat.
Unlike what someone says about that stupid Italian forum, I know how to change my mind, I'm persuaded to carry forward my ideas until someone brings me real proofs against it, and despite no one has brought me evidence to the contrary, I wanted to test by hand

[frankcilo]

Ah, and if you read my interventions a year ago, I never said I did not think the big declared surface, in fact I said that in my opinion the dar was really 58, otherwise would not explain the excellent performance of this propeller

[Spritz]

dear Frank,
as said I am happy you could test it and you are comfortable with it!

let people in other forums chat by themselves and again I am happy you touched it. you can remember that someone was telling the story about DAR (probably I am wrong when I said that you were on that side) but... let's leave them where they are...

For the vibration, do not worry that much. Now is more than two years (almost 3) that I have Autoprop on board and I can tell you that after 16 months in the water I started felling some vibrations, but was sufficient a very short dive to clean the propeller and everything was solved. So in conclusion if you feel vibrations is only because the propeller has some vegetation. You will try on your skin…..

[frankcilo]

forum.amicidellavela.it/showthread.php?tid=110458&page=2