Trim tabs and permatrim

C

Chica

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Nov 5, 2003
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C Dory Year
2004
C Dory Model
22 Angler
Vessel Name
Chica
I have been reading the thread on trim tabs and hydrafoils and was considering adding a permatrim to my trim tabs. Is anyone running trim tabs and a permatrim and what is your experience after you have had a chance to evalutate the combination? Cavatation improved? Did you consider raising your main power unit to reduce drag once the peritrim was on? Does anyone have Da Nag's peradork?
Chica
 
Just a quick reply as I am about out head out the door. I installed Permatrims at the end of last boating season. I got the Mary Ellen wet for the first time early this month. I am very satisfied with the Permatrims, they work great with the twin 40hp Hondas. Just the slightest adjustment to the trim switches and the lateral trim is fixed for load adjustments. I have raised the engines up one notch and the bow attitude is great. It is the best $180.00 I every spent on the boat. The quality of the Permatrims is also top notch.
 
Sorry, Folks - Post Deleted By Author
 
Chica, here's my short 2 cents worth on the Permatrim hydrofoil.

I am running a Johnson 90, 4 stroke w/ a Honda 9.9 kicker, and have Lenco 9"x 12" trim tabs and a Permatrim hydrofoil on a 2004 22' cruiser.

The trim tabs by themselves are ok when traveling light but under some loading conditions they are not sufficient to establish good bow attitude and it follows that if you can't do that your going to have trouble with lateral trim as well. I decided to add the Permatrim and it made a big difference in ease of establishing a good bow attitude. The combination of the Permatrim and the Lenco tabs works very well together. Both bow attitude and lateral trim are established and maintained with ease.

The boat simply handles and feels better with the Permatrim and
cavitation is minimized if not completely eliminated. I've found it to be an excellent addition to my CD.

I used the Sting Ray and 300SE Hydrofoils on past C-Dory's and really didn't care for either one. The Permatrim, I think, is well built, well designed and effective. Works for me!

Good luck and have fun!
 
I actually visited the guy - he lives in Bonita/Spring Valley near San Diego. Semi-geezerish RV'er/boater with Permatrim equipped boat dragged by a Dodge tractor. Turned to distributing when he retired from Real Work.

Very helpful and he follow the PermaDork thread here on C-Brat.

Don
 
I got my Permatrim from John Jensen. Seems like a good 'ole boy, very helpful and good service. I'm sure it's the same guy Don (Sneaks) mentioned.

@ www.johnfjensen.com
or (619) 475-3633 (between the hrs of 8 and 6)
 
Here's what they look like on a Honda 50. Boat handles much better with the Permatrim than the SST hydrofoil.

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-- Chuck
 
wow! thnx guys :thup them things are massive :smileo I can see why there so effective :!:
 
RedFox: Page 2 in my album has a pick of the one that fits up thru 150 HP. Can't say how it works as I have not had it wet yet. The website says it uses the prop thrust that slings up off the blade tips for the lift. I have a theory that if your stern is down so is that big plate. When you build forward speed the water pressure going under the plate tries to lift the plate and raise the stern. Seems like it should work like a water ski.

They have a money back guarantee. Sales guy said he has never refunded any money. Mmmm. Wonder if that could be because of the ten holes in the vent plate? :thdown
 
Sorry, Folks - Post Deleted By Author
 
Chris-

The water striking the plate at an angle before the boat is on plane is the "kite effect" in aeronautical terms. It's what's mostly responsible for boosting the boat up onto a plane faster than w/o the plate. The devices probably get very little aerodynamic lift in their function, but work great to lift up the stern at low speeds, increase planing area, and seal off the prop from ventilation, particularly in turns. My $0.02!

Dan-
Good choice!

When Yammi's not available, take out Sister Suzi! Older Sister Hondi is looking a bit past her prime these days!!!

Sorry, but I'm sure I'm getting myself in trouble again, Joe.
 
Anyone know what the pair of holes are for on the trailing edge of the Permatrim?

The size of the critter was a shock, especially after the small size of the SST hydrofoil. The versions for the big motors must be even bigger!

On our single engine 16 Cruiser the SST caused the boat to corner in what I thought was a strange manner and the boat would often not recover from turns upright, keeping a heel to the same side as when in the turn. This being my first motorboat (after decades of sailboats) I wasn't sure this was natural. The Permatrim doesn't handle this way at all.

The 4 blade wheel was purchased as a "spare," the local Honda dealer sugggested I try it, but after trying it out I've not bothered putting the 3 blade back on and keep her as the spare. We run into shallow waters many times and a spare wheel is always on board.

I'm still looking at trim tabs for this lil' boat for lateral trim, but have yet to find anyone with a 16 footer and trim tabs. Hate to be a pioneer, they're the ones with all the arrows sticking out of them!

-- Chuck
 
Chuck, the holes in the back of the plate are for the paint booth guys. They hang them up when they do the nice powder coat finish.

I have to order a spare prop and will try the 4 blade Solas and carry the three as a spare as well. They claim a four blade should give a dab more lift and little smoother. But a slight decrease in WOT. I just can't seem to get enough lift. We always carry way too much stuff. My boat ends up being one big Swiss Army knife. Ready for anything.

I have read in several places that tabs have never hurt any boat. Only improve. And the bigger the better. Except in the following sea. If that is your concern. Maybe you could make a quick release pin to where the tab would fold up basically flat against the stern.

Just think, you will always be remembered as the first... My last name is CUSTER. I always get reminded of being LAST :sad
 
Too Much you gize :lol: 8)

Now, if I read properly here; them things are metal :?: If thats the case, I'm going to fashion-one-up myself out of 1/4 Marine-grade aluminum :!: :thup After all, there over a hunert bucks .... right :?: :? :shock:

Long history with these hydrofoils (it seems) I took my old Sting Ray one off, and I got a couple mph more on the top-end, and I swear the boat feels "less tippy" without a hydro' on the engine, while underway :!: :?: If it weren't for cavitation being a factor on RedFox, I would go without one :!: . Maybe they will enhance efficiency at lower speeds :!: Most time I am under 20-knots anyway 8)

My trim tabs are for cigaret boats! lol 12x16 Bennet dual-piston jobs :xseek I sure like'm :thup But as someone mentioned "it would be great if one could totally disengage them. I do feel them in a trailing-sea, even when all the way up. Most time I'm ok when alone, and keep Baby stern-heavy. (big subject, but I gotta go now :| )
 
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