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Old 08 June 2014, 06:22   #1
jvb
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hydrofoils breaking aluminium wings?

hi ribbers,
i have good experience with simple hydrofoils on my SR5.4 / DT65.
now i am thinking to add them to my 90Merc too, but i heard they might cause the aluminium wings to break off.
do you have any experienced concerns against them?

its the cheap ones…:


thanks again for forums help!

jan
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Old 08 June 2014, 06:27   #2
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my mercury 75 has them don't know if there the cheap ones or not but nothing has broken off in the 5 years iv owned it
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Old 08 June 2014, 12:47   #3
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Logic, whether right or wrong, tells me a one piece will be stronger than a two piece. Aluminum will be stiffer than plastic and therefore again stronger.

I have "heard" that they can sometimes break the lower unit, but have never seen the results. It also begs the questions of were they properly installed and did they hit something?
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Old 08 June 2014, 14:13   #4
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I've had ribs with and without them and not really noticed any significant benefits.

Change the engine set up rather then use em!

Chris
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Old 08 June 2014, 14:20   #5
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thanks guys!
well...one has to drill some 4 holes in the aluminium wing that surely weakens it a bit. dont know. vertical force could hit an extended wing quite strong i suppose. well, i try it.
i have noted a difference with/out on the dt65. planes easier and further on the very rear. i preferred it.
thanks again
j
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Old 08 June 2014, 16:01   #6
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Quote:
Originally Posted by Peter_C View Post
I have "heard" that they can sometimes break the lower unit, but have never seen the results. It also begs the questions of were they properly installed and did they hit something?
Or try to stand on them.

jky
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Old 08 June 2014, 16:08   #7
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Like this?
Permatrim Marine Limited - Products
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Old 08 June 2014, 16:39   #8
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I have used the Stingray brand on a couple of boats. I really like the one on my little SIB as it planes at just under 13mph even with a light load. The wake is far smaller, allowing me to plane in areas I probably shouldn't without feeling too guilty. When loaded with people and dive gear to the gills, I can still plane. With that said I wouldn't put a wing on a 5.4meter boat, but instead look to trim tabs on the hull. More versatility, with the ability to level the boat. That is of course assuming the transom has the room, around any elephant trunks, sonar units, etc. If it were me, I would be doing a lot of research to pros and cons of both systems.
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Old 09 June 2014, 17:27   #9
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the permatrims look proper. mich more solid than the tiny rubbery fins.
will try to get some for mine.
thanks!
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Old 09 June 2014, 18:15   #10
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Doubt you'll need fins on an SR5.4 with a 90.
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