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Author Topic:   hydro foil stabilizer
spark posted 08-30-2004 01:56 PM ET (US)   Profile for spark   Send Email to spark  
anyone have any results using a stingray stabilizer on a slightly underpowered small whaler?
OutrageMan posted 08-30-2004 04:05 PM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
What did you find out when you searched the past posts in the forum? If after you read those and still have questions, come on back and we will help you out.


Jarhead posted 08-31-2004 08:37 AM ET (US)     Profile for Jarhead  Send Email to Jarhead     
Your question is far too vague spark. You really need to provide a little, make that a lot, more information on what performance results you're looking for to receive useful replies. :)
DWE posted 08-31-2004 09:01 PM ET (US)     Profile for DWE    
For what it's worth: after re-powering our 1976 13 Sport with a 2002 Mercury 40 HP two-stroke, two cylinder engine (165 lbs.), I installed a Doel-Fin hydrofoil stabilizer. With the added weight of the engine (previously, it had a 35 HP Evinrude [120 lbs?]), water would easily come over the Whaler’s transom while decelerating. The hydrofoil stabilizer remedied this undesirable characteristic by generating lift, thereby raising the stern. High-speed stability was improved, as well. All in all, the Doel-Fin was a cheap fix that eliminated the problems associated with the weight of the new Mercury.
macfam posted 08-31-2004 09:29 PM ET (US)     Profile for macfam  Send Email to macfam     
I have a stingray on my 13' Super Sport w/ 2000 40 hp Johnson (certainly not under-powered)
There are two sizes of Stingray hydrofoil stabilizers.
I chose the smaller "junior" size for up to 40 hp.

I makes a noticable difference in performance:

The power trim is more "dramatic" when used, at virtually all speeds.
It planes quicker, and has a slower planing speed than without the stingray, yet has not sacraficed any top speed.
The engine is mounted rather high. The anti-ventilation plate is mounted over an inch above the keel level, so it tended to ventilate under stong acceleration, unless the motor was trimmed "all the way in" before the hydrofoil was installed.
With the stingray installed, there is virtually no detectable ventilation, even is the motor is trimmed slightly out when under heavy acceleration.
In addition, when traveling in a large following sea, without the hydrofoil, ventilation would occasionally occur if the speed was fast. No so with the hydrofoil.

All in all, I continued to be amazed at what hydrofoils can do, yet they are never included/mentioned by ANY manufacturer.
I'm not really sure why.
Then again, not any tire manufacturer makes deep black, shiney tires, but they sure make my car look better, and duct tape and/or WD40 can fix almost anything.

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