GliderIreland - Ireland RC Forum - Flying Model forum in Ireland
Gliders => Scale => Topic started by: billscottni on February 08, 2020, 13:18:11 PM
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Finishing up my Island models 1/4 Scale Ka3 and wondering how people are controlling their ruddervators?
Pushrods
Snakes
Closed loop
Maybe wing servo's "in" the tails
What's the best option?
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Snakes in a Plane!
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Bill, I am using snakes but they are a bit sloppy. Mind you that is the 1/3 scale one
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Bill, I am using snakes but they are a bit sloppy. Mind you that is the 1/3 scale one
Not a great fan of snakes unless they can be properly supported along their length, even then the trim can vary with temperature. Seriously considering putting 2 wing servo's in the tails for more direct control
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Go for it, Fred said the model could do with a bit more weight for penetration.
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20 - 25g extra at rear is probably going to be 100 -150g at the nose so not too bad and control authority should be improved
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I use sullivan pushrod on mine.
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Thanks Erwan
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Hi Bill,
I used Sullivan blue/yellow snakes in my 1/4 sc model and 'servo in tailplane' in my 1/3 sc model and they both work equally well as far as I'm concerned.
I have the snakes well supported along their length, so there's no slop or play to speak of.
I would suggest the red/yellow snakes are too flexible, while the black/yellow ones are too stiff for a fairly small model.
I can put up some photo in the next day or two if it would help.
regards,
GerryB
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Hi Bill,
Same for me, Sullivan snakes :)
Works a treat, but nothing stop you putting servos in the tail like the 1/3 version one :)
I saw your message also ;)
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Thanks Fred. Now i'm completely undecided!! I'd convinced myself servo's in the tail was the ay to go, but it woul drequire some surgery on the already built tails. I have sullivan snakes in the garage, so may go that route
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Hi Bill,
Some photos as promised....
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Snakes cross over inside fuse to keep runs as straight as possible, the right hand servo operates the left hand V tail. GB