Mhz Mystic S turning problem

[bjornar]

can you run in a straight line at all with out touching the steering ?
if not it has to be servo related,if you hold the rudder and turn the tx wheel is there any slop

No, I cant run straight even if I dont touch the steering wheel. Its not any slop in the steering.

[bjornar]

Since you've tried another servo, and it still does it, I'd say it's a radio interfernce issue. What tx/rx are you using. Have you swapped it and tried another?

I am normaly using 4PK, but I have also tried a 40Mhz system with the same problems.

[bjornar]

Try this, Put the boat in the water, Hold the sides firmly, have a friend slowly pull the trigger. watch the rudder movement and the thrust from each prop. Find out if the issue is drive line or steering

I have tried this, and I cant see any problems

[bjornar]

I was looking hard at your pictures rather deeply, Is one of your + wires removed from your Y connector either side L or R? if not you may have harmed the Rx. I want to say Rx all the way, I run the Futaba FASST systems on everything I own ( currently trying to hook the wife up to one ) And I think they are the BEST! But one wrong move and the Rx is junk.... Also have you ever got the Rx wet? Does it hold it's bind to your Tx? I have pluged the backward for one sec and it was junk, barely got one wet and it was junk, one would'nt hold it's bind and caused the boat (SV27) to dive straight down under water..
I may be wrong but I suggest you try a new Rx.

I have tried another tx/rx system and had the same problem.

[RaceMechaniX]

This may soud a little risky, but try quickly accelerating till the boat is on plane. It might still want to steer from side to side, but see if its worse or better than running at low speeds.

Tyler

[BakedMopar]

Try a different "Y" harness Probably doesn't matter but worth trying.

Also when when you say your connecting the batteries together. Are you connecting both escs to the batteries? Here's how I wire mine.

[RaceMechaniX]

A good diagonostic tool would be an Eagle Tree Datalogger. This way you could monitor the steering and throttle input to see if there are any funny signals going on. You could monitor the motor RPM of each side to see if the motors are running at different RPM's or synced.

This would help determin if its a radio/esc/motor issue or a hull issue.

Tyler

[bjornar]

Try a different "Y" harness Probably doesn't matter but worth trying.

Also when when you say your connecting the batteries together. Are you connecting both escs to the batteries? Here's how I wire mine.

Yes, I wired it just like yours. I dont have another Y harness, but I have used the same Y harness in another boat without problems.

[bjornar]

A good diagonostic tool would be an Eagle Tree Datalogger. This way you could monitor the steering and throttle input to see if there are any funny signals going on. You could monitor the motor RPM of each side to see if the motors are running at different RPM's or synced.

This would help determin if its a radio/esc/motor issue or a hull issue.

Tyler

My brother has an eagle tree, but he dont have the equipment right now to observe to much. But I guess I have to buy some new equipment if I cant find out of this...

[RaceMechaniX]

I was just looking on Eagle Tree's page and the brushless motor sensors are very reasonable and easy to incorporate.

The controller and steering servo leads just plug in and only need an extension.

TG

[785boats]

Quote:
Originally Posted by Diegoboy
Try this, Put the boat in the water, Hold the sides firmly, have a friend slowly pull the trigger. watch the rudder movement and the thrust from each prop. Find out if the issue is drive line or steering

I have tried this, and I cant see any problems

Try that again but with your brother standing 30 or 40 feet away. It may be a range related thing . Make sure the batteries are fresh in the transmitter.

Tuslow1 asked if you had removed the red wire from one of the ESC leads that go to the RX. I can't see where you answered him.
Have you? Two different supplies into the RX from two different batteries that can be at two different & varying potentials, is not a good thing.
Hope you get this sorted soon.
All the best.
Paul.

[bjornar]

Try that again but with your brother standing 30 or 40 feet away. It may be a range related thing . Make sure the batteries are fresh in the transmitter.

Tuslow1 asked if you had removed the red wire from one of the ESC leads that go to the RX. I can't see where you answered him.
Have you? Two different supplies into the RX from two different batteries that can be at two different & varying potentials, is not a good thing.
Hope you get this sorted soon.
All the best.
Paul.

Hi

I actually started out with one of the wires disconnected. But then I connected both sice I did not think it would mather. The problem was there before I connected both of the red wires.

[bjornar]

I drive with both disconnected when I use the hydras. External bec...

[bjornar]

did you get a chance to test swapping L/R prop and flex?

Then I tried swapping L and R prop/flex with the same results

[Gerwin Brommer]

How much room do you have between dogdrives and drives ?
Steering : steel-cable through steel tubes ?
As your hull is made from carbon, and the steering is "all" metal : glitches.
Try to insulate the steel tubes from the hull !!
Is your servo ALL metal gear ? Replace by one with at least 1 plastic gear in it !