Peter Gise
Well-Known Member
- Joined
- Aug 25, 2009
- Messages
- 175
My JAE 21 FE tends to "oversteer" when exiting turns. Would moving the turn fin (forward?) a bit help to make it steer more neutral?
AKA "Exponential" on Futaba radios though I don't think you can't do it on the fly with the 3PM. Dial down your end point adjustement first and then fine tune your steering curve.On the MT-4 I can change the steering rate (using dual-rate) but it also has a function called "curves" where you can move the point that the rate changes along the steering curve on-the-fly (I programmed the curves function into the AUX CH dial). I could make the steering less sensitive towards maximum deflection of the rudder, so it wouldn't turn as hard at the exit of the turn.
I agree with Don. Most times it is a weak servo with not enough power to come back to center that causes this particular problem. Hydros, monos, all boats. The prop is trying to put the boat into a right hand turn, so straightening the boat after allready in a turn takes more power than putting the boat into a turn.How strong is your steering servo? Is it new? What voltage? A hydro that struggles to "unsteer" itself once it's "hooked up" on the turn fin can also be caused by a weak, underpowered or failing steering servo. I use a Futaba 9405 hi torque servo in my JAE 21 FE, it turns and "unturns" on a dime.
The servo is a new 2056 Traxxas waterproof servo that came with the hardware kit. I'm using the BEC on the ESC so I assume it's 5v, but I don't know how much current it can supply (servo plus receiver). The linkage is 4-40 and very short (maybe 3 inches); but it pushes on the rudder arm for right turns. However, I don't think it's flexing as it's very stiff.How strong is your steering servo? Is it new? What voltage? A hydro that struggles to "unsteer" itself once it's "hooked up" on the turn fin can also be caused by a weak, underpowered or failing steering servo. I use a Futaba 9405 hi torque servo in my JAE 21 FE, it turns and "unturns" on a dime.
I just googled the servo and found these specs:The servo is a new 2056 Traxxas waterproof servo that came with the hardware kit. I'm using the BEC on the ESC so I assume it's 5v, but I don't know how much current it can supply (servo plus receiver). The linkage is 4-40 and very short (maybe 3 inches); but it pushes on the rudder arm for right turns. However, I don't think it's flexing as it's very stiff.How strong is your steering servo? Is it new? What voltage? A hydro that struggles to "unsteer" itself once it's "hooked up" on the turn fin can also be caused by a weak, underpowered or failing steering servo. I use a Futaba 9405 hi torque servo in my JAE 21 FE, it turns and "unturns" on a dime.
Maybe this servo isn't strong enough?
Pete
Update: The ESC/BEC can supply 3.5A at 5.0V so it should have the current drive.
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