Sorry for the newb question, i did search first.

[cartronicshn]

Hi guys, i was hoping you could help me out, i am trying to build a twin motor boat, i need it to steer with the motors, i am using dual sidewinders and wondering how i could use the channel mix function on my dx3r to achieve this, i really have no clue if this is possible, any help would be greatly appreciated

[detox]

The Traxxas Villan steers using it's props. Maybe this link and picture will help:

http://www.traxxas.com/products/marine/villain_ex/trx_villain_ex_over.htm

[Jesse J]

This is an interesting idea... Since twins are hard to steer anyway, why not mix the motors... the only thing is you need to have dual CH2 inputs since most twin ESCs go into a Y harness, there is no way to separate the channels. I would like to see it done though, maybe there is a rx out there with two throttle outputs?

[cartronicshn]

The Traxxas Villan steers using it's props. Maybe this link and picture will help:
http://www.traxxas.com/products/mari...in_ex_over.htm

Thanks i had seen that speedo before, i was hoping that i could be done through regular speedos and channel mixing.

This is an interesting idea... Since twins are hard to steer anyway, why not mix the motors... the only thing is you need to have dual CH2 inputs since most twin ESCs go into a Y harness, there is no way to separate the channels. I would like to see it done though, maybe there is a rx out there with two throttle outputs?

See, that's where i am lost , the mixing part, if you have to setting or 2 mixes is it possible to achieve this with the dx3r, mix throttle and steering on two different mixes, i hope this makes some sense.
Thanks for the replies guys

[Meniscus]

I would think you could use a unit such as this and jump the board: http://servocity.com/html/dual_servo_driver.html

I know of another product, but it will take some digging to find. I'll post if I can find it.

Welcome to the forum cartronicshn!

[Meniscus]

Link to another product: http://www.astecmodels.co.uk/catalog...products_id=44

Another that could be adapted: http://servocity.com/html/180o_servo_stretcher.html

[Jesse J]

Yes bienvenidos Carlos!

I misunderstood you, I thought you wanted to mix the two motors, not the motors and steering. Now I get it.

Are you wanting to reduce your throttle as you turn? What would you like your boat to do?

Looks like Ben has some handy links for you, I hope I didn't add to confusion with my misunderstanding.

[hide]

What I do with my 4PK: Run one ESC channel 1, the other 3. Get them both to run off throttle input. Then mix the channels so that when you turn the wheel clockwise the left hand motor slows, and vise versa. I'm not sure if such mixing is possible with the DX3R.

[cartronicshn]

I would think you could use a unit such as this and jump the board: http://servocity.com/html/dual_servo_driver.html

I know of another product, but it will take some digging to find. I'll post if I can find it.

Welcome to the forum cartronicshn!

Thanks for the welcome and links, although i want to slow down one motor at the turn of the wheel.

Link to another product: http://www.astecmodels.co.uk/catalog...products_id=44

Another that could be adapted: http://servocity.com/html/180o_servo_stretcher.html

What I do with my 4PK: Run one ESC channel 1, the other 3. Get them both to run off throttle input. Then mix the channels so that when you turn the wheel clockwise the left hand motor slows, and vise versa. I'm not sure if such mixing is possible with the DX3R.

Exactly what i am wishing to do, know i need someone who can help me with a walk through as to what values and what channels to mix.
Thanks to all you guys for being so helpful.

[cartronicshn]

Yes bienvenidos Carlos!

I misunderstood you, I thought you wanted to mix the two motors, not the motors and steering. Now I get it.

Are you wanting to reduce your throttle as you turn? What would you like your boat to do?

Looks like Ben has some handy links for you, I hope I didn't add to confusion with my misunderstanding.

Thank you to for the welcome, yup that's exactly what i want to do, slow one motor down as i turn the wheel .

[cartronicshn]

well i managed to get both motors working on the throttle mixing ch1 and ch2 , know i need some help on how to cut speed on the motors when i turn the wheel, i then treid what hide suggested and i get motor 1 on trhottle and motor 2 on steering, hide if you could tell me what values you use on your 4pk, this would help get an idea on how mix my channels on my dx3r.

[hide]

I had a look at my DX3S, it seems the set up is far different to the 4PK. For the 4PK I can make it so that when say I turn clockwise 50% the right motor will slow down to 50%. This is done by setting it so when servo travel reaches 50% (clockwise) it will realise and limit the motor. This is just an example as I only did this to see if it was possible with some stuff I had around for you.

I'm afraid thats as much as I can help you with the DX3R. All I can say is mess with it and find some values that work for you!

[sundog]

What you're trying to do is called 'vector steering' and is how most of the toy boats are now controlled. On an airplane transmitter, you might have the option for rudder mix - as in V-tail rudder, or tail rotor in a helicoter. This could be incorporated in motor (vector) steering on a boat. But it is a crappy way to steer - to drag a prop to turn. Reminds me of riding a toboggan and steering by dragging your feet in the snow. It does work well on tugboats where control at low speed is required.

[cartronicshn]

What you're trying to do is called 'vector steering' and is how most of the toy boats are now controlled. On an airplane transmitter, you might have the option for rudder mix - as in V-tail rudder, or tail rotor in a helicoter. This could be incorporated in motor (vector) steering on a boat. But it is a crappy way to steer - to drag a prop to turn. Reminds me of riding a toboggan and steering by dragging your feet in the snow. It does work well on tugboats where control at low speed is required.

Well thanks for your input, it is indeed a toy boat who's esc crapped out, i have many esc's and that's why i chose to pursue this project as i won't invest any money on it since i have all the pieces, i am trying to see if like this part of the hobby and invest on it later on.