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 wont turn left

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goldslinger
Midshipman
Midshipman
goldslinger

Posts : 95
Join date : 2016-05-29
Age : 59
Location : North Wales uk

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PostSubject: wont turn left   wont turn left EmptyMon Oct 10, 2016 4:48 pm

hi all my air boat wont turn left but will turn right on a six pence
both rudders have independent servos but the servos are matched and run off a y lead to one servo control
both rudders move left and right the same amount
i am running a pusher prop which rotates anti clockwise
any one got any idea's
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Roadrunner
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Roadrunner

Posts : 1661
Join date : 2011-06-10
Location : Aberdare South Wales

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PostSubject: Re: wont turn left   wont turn left EmptyFri Oct 14, 2016 3:23 pm

It's to do with the rotation of the prop, the prop is aiding in the right turn but defeating the left, similar to prop walk on a boat. Only way to correct this issue is larger rudders, or increase the rudder throw so left becomes more responsive.

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Roadrunner
Forum Overlord
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Roadrunner

Posts : 1661
Join date : 2011-06-10
Location : Aberdare South Wales

wont turn left Empty
PostSubject: Re: wont turn left   wont turn left EmptyFri Oct 14, 2016 3:25 pm

On a side note a single central rudder would work better and directing air throw, or setting up larger rudders to the outer edgers of the blade creating a funnel effect allowing the thrust to be directed better.

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goldslinger
Midshipman
Midshipman
goldslinger

Posts : 95
Join date : 2016-05-29
Age : 59
Location : North Wales uk

wont turn left Empty
PostSubject: Re: wont turn left   wont turn left EmptyFri Oct 14, 2016 4:20 pm

thanks for that it had me puzzeld
i will fit some bigger rudders on it this week end
at the moment the throw on both rudders in either direction is about 40degs
so i will have to reduce the right turn a little
thanks Very Happy
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goldslinger
Midshipman
Midshipman
goldslinger

Posts : 95
Join date : 2016-05-29
Age : 59
Location : North Wales uk

wont turn left Empty
PostSubject: Re: wont turn left   wont turn left EmptyTue Oct 25, 2016 9:11 am

well i made up a new set of rudders about 1/2 as big again
and hey the boat turns both directions now
thanks
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Roadrunner
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Roadrunner

Posts : 1661
Join date : 2011-06-10
Location : Aberdare South Wales

wont turn left Empty
PostSubject: Re: wont turn left   wont turn left EmptyThu Oct 27, 2016 2:00 pm

Glad the solution was easily resolved

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