torque roll?

[steveo]

rebuilding my om29 mono and i think i remember it leaning to the right and i know i had good balance in the hull how do you get rid of this, could weight be a factor i was using 4s1 now 4s2p alittle heavier might help?

some boats have offset strut to the right others center why?

[BakedMopar]

Yep mines used to lean to the right alot. Try to move you stuff around first. I eventually ended up adding weight. 3 oz to be exact to the port side. Strut is set level with the centerline at 1/2 from keel. Rudders are 1 degree negative. My port trim is always 1 degree lower than starboard side. COG is around 6 5/8". Using a 8xl with a m445. Ran great in the chop with this setup. This was the first time with this combination after talking with Randy from BBY. Second run the water became much flatter and was running wet. While bringing her in to adjust the cog it stuffed under and cracked the hatch. Good thing there's a lot of floatation if not she would of been a gonner. Lost a esc but everything else besides the hatch was salvagable. Not going to give up on this boat just yet.

[steveo]

not much i can move around servo and motor in line, batteries seperated by rails, i will put the esc to the far left side and see what happens and then add weight if need be

thanks for your input

[GregS]

Do you mean it's rolling when cornering or all the time even when going straight? I have an OM26 that does this but only when turning sharp right. What happens is that when it leans into the turn (like it's supposed to) the prop comes closer to the surface and loses grip. When it catches again the sudden torque input causes it to roll on its side. Not sure if this is what's happening with yours.

I have a hydro with a strut slightly off centre to the right. In this case the reason is to counteract the natural steering to the right caused by the prop. Less rudder input is required when going straight reducing drag.

Greg

[Jesse J]

you might try a smaller prop or less pitch. I have found that while propping up, the torque roll increases - sometimes. I think it comes from high rpms AND larger/higher pitch props. Just a thought.

[BakedMopar]

While that holds true to some extent I beleive it's more of the hull characteristic. It's really deep!

[Jesse J]

Could be, I have also noticed it on cats and small hydros as well.

[Boatman]

Dont know if thats the boat in your avatar but make sure your leading edge of rudder is even or behind front edge of the prop. Makes a huge difference. I ended up starting with a 45mm prop and am now running a 640 and 642. This hull likes less torque and higher rpm. The only thing I have not completely eliminated is the wobble it takes on at times. With a 2200KV motor on 4S running a 640 prop it is not as fast as I think it can be but a very competitive fun boat to drive.

[steveo]

i changed that setup to fullers strut which brought the prop closer to the hull about 2" so the rudder was an inch or so behind it i had more adjustability then. i also need the rudder to be lower this time to reduce prop walk

[BakedMopar]

Could you post some pics of the back and the inside of the boat.

[hydromaddicted]

Can you explain how you know you had your CG right? weight is the factor?What's your technique for measuring CG sounds like your off to the right somehow?

James