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[Stuart]

Does anyone have any tips on how l can improve the turning circle on my 34" Huntsman 31. Its difficult to describe here but the turning circle is large and makes maneuvering quite difficult.
I have noticed that the servo, which is new, only gives limited movement left and right. Is it worth considering investing in a better quality servo? Also the rudder looks too small, would a larger rudder make a difference? Thanks.

[DickyD]

Hi Stuart

Check your connection between rudder and servo.

Move it to the furthest hole away from centre on servo and move it to a hole nearer the rudder post on the tiller arm. 

[catengineman]

Could you fit a "becker rudder" to the vessel

R,

[tigertiger]

Any servo should have more than enough movement for a rudder.
I believe 35 degrees either side of centre seems to be optimal, more than that it acts as a brake and does not really aid turning.

There is possibly something wrong with the linkage setup, as DD suggests.

[derekwarner]

Stuart....this is also a very complex consideration  ....as 'tigertiger' notes ....however is only relative to the mass/flow of water as presented to & over the rudder surface area & angle of force

1) the vessel @ speed + rudder movement creates a turning moment
2) the vessel @ speed + propellor thrust against the rudder creates a greater turning moment
3) the vessel @ initial ZERO speed + propellor thrust can only achieve the turning moment relative to the mass/flow of water presented to the rudder

When we take this one step further.......[especially with side wheel paddlers] ...we see that 80% over scale rudders are an advantage,......+ 180 degrees included angle of rudder travel.......do act as a braking moment,  but also serves as to aid [reduce] the turning circle...........Derek

[FullLeatherJacket]

I have noticed that the servo, which is new, only gives limited movement left and right. Is it worth considering investing in a better quality servo? Also the rudder looks too small, would a larger rudder make a difference? Thanks.

A standard servo should rotate about 45 degrees each side of neutral. If it's significantly less then my bet is that you either have a computer radio with the throw programmed in as reduced, or rate switches set at low. A larger rudder might help, but don't forget that the full-size Huntsman has twin motors and would use split throttles for low-speed manoeuvring. If you tried anything clever at full chat the poor thing would probably trip up and sink!

FLJ

[barryfoote]

As the full size vessel has twin motors, the solution is easy. Convert her to twin screw, twin motor and use one of ACTion's P94 double esc and mixer unit. She will then turn on her axis..

[tigertiger]

Hi Stuart

You asked in the original post, 'would a larger rudder help?'

How many rudders do you have? And how many motors/propellers.

If you have two motors and one rudder, this could be the problem.

[funtimefrankie]

On my radio there is a switch which restricts the movement of servos. (An aircraft thing I think) Sometimes this gets switched by accident, making me think I have a fault.
You can set the amount of restiction so my is now at the max, just in case.

[Stuart]

Thanks for all the advice. I have adjusted the linkage as suggested by DD and l plan to carry on with my sea trials later on this week. I have only used her on 3 occasions so far and being my first boat l am in the process of fine tuning at the moment. I will let you know how l get on.

[red181]

Hi Stuart,
as mentioned previously, do you have a computer/digital transmitter or not? Then we can at least help with the tx set up if its digital with certain features that can restrict the servo throw.

[Stuart]

pmdevlin - I have a digital transmitter. Any assistance gratefully received.