Best surface Drive for Marine diesel?

[masalai]

I have NO problems with the drive - per se, - I don't understand his explanation on removing barnacles???? after they settle on the metal of the ram that moves inside the hydraulic cylinder. They (barnacles) are not readily removed - intoto - (every particle of calcium abrasive material or whatever it is that they use to hold fast - it is abrasive & can reduce seals/rings or other mechanisms used inside the hydraulic cylinders to get the cylinders/pistons to function without leaking the hydraulic fluids. It does happen. I have seen the leakage which usually ended up (not in surface drives but other mechanisms relating to rudder actuation) being moved to above waterlines.... Screw shafts rotate and are usually sealed elsewhere and do not have to contain high pressures in hydraulic actuation using rams.

My issue is how does one resolve those issues relating to hydraulic ram actuation which is in-&-out within a cylinder, not round & round.... Mentioning a shear ring is not enough the fine particles left are the problem over time.

[Frosty]

This is unbeleivable. Mas must and I must have asked this question 10 or more times now.

I refuse to believe that the participants of this thread are really confused at the question, no one can be this dim I think your having a laugh.

Mr Volaire if you understood the answer to the question then please explain to me because I am a bit dim also, I did'nt get it.
Just to remind (again) how do Arneson drives manage to have "no" marine growth as claimed by Rik?

Geeeez I can hear you all laughing I cant believe I am falling for this, day after day.

[Steve H]

Originally Posted by masalai

I have NO problems with the drive - per se, - I don't understand his explanation on removing barnacles???? after they settle on the metal of the ram that moves inside the hydraulic cylinder. They (barnacles) are not readily removed - intoto - (every particle of calcium abrasive material or whatever it is that they use to hold fast - it is abrasive & can reduce seals/rings or other mechanisms used inside the hydraulic cylinders to get the cylinders/pistons to function without leaking the hydraulic fluids. It does happen. I have seen the leakage which usually ended up (not in surface drives but other mechanisms relating to rudder actuation) being moved to above waterlines.... Screw shafts rotate and are usually sealed elsewhere and do not have to contain high pressures in hydraulic actuation using rams.

My issue is how does one resolve those issues relating to hydraulic ram actuation which is in-&-out within a cylinder, not round & round.... Mentioning a shear ring is not enough the fine particles left are the problem over time.

I was wreck diving in Truck Lagoon a few years back. I vividly remember a Japanese aircraft that was lying inverted exposing the landing gear in about 30 feet of water. The oleo struts were still clean and shiny (oleo struts are very much like hydraulic rams) Not one barnacle. This plane had been in salt water for over 60 years.
I was a sport fishing guide in Alaska for several summers. The barnacles up there are nasty. Yet I really don't remember any significant seal problems on our Merc drives (I do admit it was a long long time ago) These boats were left in the water all season.

I am just relating my personal experiance with the question at hand. Not interjecting off topic gibberish. Like the police don't like Arnesons because of the rooster tails Jeesh

By the way, rooster tails are not exclusive. This video wes taken about 6 years ago showing my boat at cruise with fixed surface drives before the Arnesons were installed. Hellacious rooster!

http://youtube.com/watch?v=QIno_IM0Y-s

[longliner45]

if there is fresh water content in this lagoon ,,you wont have barnicals,,,,just a thought.longliner

[Volare]

Mr. Frosty I see you approache non still work. Like Mr. Steve H say "interjecting off topic gibberish" I not knowe why you say when you have surface drive. It non "rooster tail"? I think you have rooster tail if you have surface drive no? Why only anresin? Why no Levi? Why no Sea Fury? Why no Zf? Why no Frosty?

[masalai]

I no speak Italian, Can't be bothered, By-by - all yours now...

[Frosty]

The Malaysian police that travel the Malacca straits do not like Arnesons because of the rooster tail.

In the bright sunshine and even a moonlit night the rooster tail can be seen miles away as no one else has them around here it is pretty obvious to smugglers and other undesirables that the police are coming.

There,-- I can't get it any more simple,-- jeesh

I dont think Arnesons rams are as deep as 30 feet Steve, and as for rooster tails if you new what caused them you would know that different drives don't have them.


Mas,-- hang on Im coming with you, start the engine quick lets get out of here before any more,------ experts turn up.

[masalai]

Thank you Steve H, any ideas as to why no growth???? kinda puzzling..... All I can think of is that the hydraulic fluid is stickey (stops in the metal) and is toxic to much marine growth. A new antifoul coat chemical!!!!!!

Good point Longie, The quest is still ON?????????????????????????????????????????????????????????????????????????????????????

[Steve H]

Originally Posted by masalai

Thank you Steve H, any ideas as to why no growth???? kinda puzzling..... All I can think of is that the hydraulic fluid is stickey (stops in the metal) and is toxic to much marine growth. A new antifoul coat chemical!!!!!!

Good point Longie, The quest is still ON?????????????????????????????????????????????????????????????????????????????????????

I really don't know. I am not an authority of any kind on this topic other than my personal observations and experiances owning, operating and servicing the Arneson drive. I am starting to believe that this is a very minor issue with Arnesons if it is a issue at all. I do know that the rubber boot that covers the ball and socket is not meant to be water tight. It is strictly used to keep marine growth from growing on the ball section and then tearing out the o ring seal. I'm sure you could buy some rubber covers for the hydraulic rams that would serve the same purpose. I have purchased small ones for the drive and tab indicator cables that are under the water line and they seem to last quite a while.

The aircraft was in Truck Island Lagoon, ( Chuuk if you are a local) no fresh water near by. Very warm salt water in the mid 80's.

Steve

[Volare]

Mr. Frosty I non understand why you non answer and you say "if you new what caused them you would know that different drives don't have them" why your special? why no rooster from Frosty drive? you non answer lot

[Frosty]

Some drives Arneson and Zf for instance are movable, they steer and trim. There are more drives fall into this catagory.

Other drives such as Levi, Flexidrive have a tunnel rudder over the top of the propeller re-directing the rooster tail.

[Steve H]

Remember also that all that water going up helps push the stern down helping with bow lift at higher speeds. Lack of bow lift is a problem that all surface drives suffer from.
When I installed the Arnesons I used the splash gaurds over the prop trying to tame the rooster some. Didn't seem to help much. I have since taken them off. Arneson doesn't use them anymore anyway. I have since had a larger swim step made. Now I can finally see behind me. I do not have the bow lift I used to, but it is not a problem unless I am WOT.

http://www.youtube.com/watch?v=P0ekb...eature=related

Here is the view from inside the boat while at cruise power with the old drives.

[Volare]

Mr. Buzi do not move he make big rooster so I non think moving drive make rooster. Surface drive make rooster.

I like http://www.youtube.com/watch?v=zUYec...eature=related

[westlawn5554X]

I remember someone say using youtube is very unscientific... it would be interesting if data or information instead is submitted...

[masalai]

Don't worry westie, nothing too intellectual - just boats doing a pass for the home video camera. Check the others - more of the same.... Some with big rooster tails (singing "cock a doodle do" and others seeming to say "any cock will doo")

The Levi style does not produce such a "mark" for those pirates 'et al' to see
if they are hiding from police etc..... The inverted U rudder assembly...