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 Degees of rudder turn ?

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troutrunner
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PostSubject: Degees of rudder turn ?   Fri Nov 14, 2014 9:48 am

Just a bit of a query.

What degree of rudder turn do folk try to achieve, for instance 45degree from straight ahead or more or less.

This may be a stupid question but without seeing others boats, I have not a clue what is acceptable.

Thanks in anticipation Thumbup
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Tug--Kenny
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PostSubject: Re: Degees of rudder turn ?   Fri Nov 14, 2014 10:38 am

It's really down to the swing of the servo and what you can get away with.  Obviously the further it turns the sharper the boat will maneuver.

Hope this helps

ken
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troutrunner
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PostSubject: Re: Degees of rudder turn ?   Fri Nov 14, 2014 11:20 am

Thanks Ken,

I understand the workings, including the positioning of the connecting rod as in by using a different distances from the rudder and servo centrelines, if they are positioned at different distances you will get more or less angle on the rudder for the distance the servo moves.

I suppose I didn't make it that clear, what I am asking is, what angle would be best for (1) Fast Patrol Launch (2) Eileen and (3) The Great Lakes Freighter.

:DIt's perhaps a rule of thumb guide I am looking for Very Happy
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nhp651
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PostSubject: Re: Degees of rudder turn ?   Fri Nov 14, 2014 11:38 am

never measured it before, but just tried on my lifeboat and I reckon it's about 35 degrees maximum on my futaba servos on a standard throw..............I suppose if you lengthen one or other arms you'll get a greater one, but I have always been satisfied with that where the servo and the rudder arms are the same lengths.

neil.
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troutrunner
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PostSubject: Re: Degees of rudder turn ?   Fri Nov 14, 2014 2:01 pm

Thanks Neil, sounds reasonable.

Just found this by "Googling" :-


Angular Movement wrote:

Angular Movement



Some builders seem to believe that by having the rudder angle increased will compensate for a small rudder area. This is not true. An excessive angle will make the RC boat appear tippy and unstable when in tight turns. Typically it is best to stay close to the full-scale vessel, which in most cases is +/- 25 to 30 degrees, but not to exceed +/- 35 degrees.


Here is the source :- http://www.building-model-boats.com/rc-boat-rudder.html which is worth a read Thumbup

Other opinions would be welcomed 2thumbsup
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shipmate60
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PostSubject: Re: Degees of rudder turn ?   Sun Dec 07, 2014 12:20 pm

You are correct Neil, anything over 35 degrees is assumed to produce drag which can slow a model quite quickly.

Bob
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troutrunner
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PostSubject: Re: Degees of rudder turn ?   Sun Dec 07, 2014 5:00 pm

Thanks for your input Bob, you are confirming  the general thought, I will try to get somewhere between 25 & 30degrees on my fishing boat Eileen Thumbup
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raaartygunner
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PostSubject: Re: Degees of rudder turn ?   Sun Sep 09, 2018 3:07 am

troutrunner wrote:
Thanks Neil, sounds reasonable.

Just found this by "Googling" :-


Angular Movement wrote:

Angular Movement









Some builders seem to believe that by having the rudder angle increased will compensate for a small rudder area. This is not true. An excessive angle will make the RC boat appear tippy and unstable when in tight turns. Typically it is best to stay close to the full-scale vessel, which in most cases is +/- 25 to 30 degrees, but not to exceed +/- 35 degrees.


Here is the source :- http://www.building-model-boats.com/rc-boat-rudder.html which is worth a read Thumbup

Other opinions would be welcomed 2thumbsup
Whilst post is a bit dated, link still works and is very helpful and still relevant today.

Thank you
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troutrunner
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PostSubject: Re: Degees of rudder turn ?   Sun Sep 09, 2018 9:14 pm

raaartygunner wrote:
Quote :
Whilst post is a bit dated, link still works and is very helpful and still relevant today.

Thank you

I do apologise for not posting, I will resume building at some point in the future, I just have no time at the moment.
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