Ok does anyone know if they make hydro trim tabs. or remote adjustable trim tabs. Or anyone have any ideas on how to make them? I wanna be able to adjust them using a channel on my remote.

Hydro's as a rule don't use trim tabs as the rear of the boat is supposed to be out of the water at speed. They're supposed to ride on 3 points, the front sponsons and the prop when dialed in properly.

im sorry, i should've refrazed that... I want them to be hydrolic. Again i wanna put them on a dumas donzi Z-65

You're in the wrong forum I think to get any answers to your question. This forum is more for scale model ships.

this is a scale question.. I wanna put scale remote trim tabs on a dumas boat.

The only limit is your imagination and ingenuity....

Put some hinged plates on the back of your boat, and add servo control.

i was thinking that, but how would i get the servo (s) to move them?

This would go under either general, gas, nitro or electric depending on what you want to power it with.
The same thing with your auto-bailer question.

hEY SHARKBAIT , HI-TIDE HERE, IF YOU GO TO THIS SIGH< swissmodelpowerboatteam. and check out the boats, drives , also he made servo on the trim Tab on the Victory Boat HP go to this sigh and you will see all his sigh, You need a jewelers lath to make these parts or buy them from him.
I am going to put that style on my little boat, and deffenly on the boat that I will build this winter the way to go is the same as if you were in your own 30 ' Donzi It is scale It is all about holding the boat in the water , so if we are not in the boat we are still feeling when we turn the nob, flip the switch, we are driving , going to need two servo h/d 4 or more chanels, well i am going home say good night.

You sort of have two options on how to control those trim tabs. One is by running a rod to them and moving them with the servo. Another way is to really make the things hydraulic. Uh, that last one isn't going to be very easy (as if you couldn't figure that out ). And not that running a control rod to those trim tabs is going to be all that easy either! You do have some room to play with in that 'Donzi' so either is 'possible'. Personally, I'm more of a 'bend them and see' person, just don't want to mess with the hard way...
- 'Doc


PS - I also think this is the right forum for this kind'a thing.

Heres some modified tabs to use a servo.






Danny of Sonic Racing in Australia also makes a very nice adjustable trim tab setup

wow. what an amazing boat that is. incredible detail and function. any more full pics of it, JAW?

to the OP, hydaulics probably arent going to be a viable application for tabs. my vote goes to servo controlled surfaces. 1:1 boats use hydraulics b/c of the convienent source of power from power steering pumps on the engines. use the same logic and use the easiest power source for your boat.

FWIW, i also think this is the appropriate subforum for the question; it is reguarding a scale Donzi...

forget hydraulics, JAW's example is perfect for your boat, pretty simple too.

JAW what do you use to seal the linkage? that's pretty discreet, I expects to see rubber boots or something.

This is a buddy of mines boat. He has internal boots though the rod is above water at idle.

[link=http://justaddwata.com/RC_Boat_Photos.php]theres more pics here[/link]

hanks guys. I will be tryiong both since i have 2 donzi's now