Originally Posted by CFR
Hi all, i am considering also the swap from fixed to feathering prop. I also hope that due to the less turbulence my wheatherhelm will be reduced which 2 friends of mine experineced with their boats. I have a 44 feet aluminium boat with a 2 cyl. Sabb engine
with only 30 HP which give me 7 knots at calm conditions. As i like stainless steel
props, which i have at the moment , i checked with autostream but the mentioned their 20" is too small for me. Now i found Ewol
. Looks very nice but i never heard about them before. Any experience availöable from the forum would be appreciated.
I had a look at the Ewol web site. As I have two autostreams on my cat I thought it would be worth a comparison. I am a bit surprised that autostream said that a 20" was too small. I have 18"s on my 40hp Yanmar
sail drives and they seem to do just fine. From looking at the installation
video I would say that the Ewol installation
is definitely simpler than the autostream. I don't think I would ever attempt to do the autostreams under water
. I'm assuming you have a shaft drive so this information may not be relavent, but with the autostreams on a saildrive
it is impossible to change the drive zincs without complete disassembly and removal
of the prop. This is true even when using split zinc kits. The problem is the skirt of the prop hub essentially covers the zinc and it impossible to access. The smaller hub of the Ewol seems to eliminate this issue. The blades of the Ewol look to be thinner than the autostream, which may or may not be an issue. The blades certainly have a different shape than the autostreams, whether this translates to greater efficiency I don't know. Adjusting the pitch
seems to be easier with the Ewol as well. Adjusting the pitch
on the autostreams is not terribly difficult and there are separate pitch adjustments for forward and reverse. I did not get deep enough into the Ewol documentation
to see if it had a similar feature.
All that being said it looks to me like the Ewol is certainly worth a good hard look. If I was looking to replace my autostreams I would certainly be doing so.