servo reverse y lead

[boatbuilder1]

I am having a bit of a problem and need input
I just finished a 1/48 Type XXI and the bow and aft planes move in the same directions mean when the bow planes are at rise the stern planes are also at rise not good IMO
I want them to move opposite of each other for better faster dive times bow planes at dive and stern planes at rise this puts the nose down and the tail up and visa versa is there a y lead that has a reverse circuit in it or would just reversing polarity on one servo do the job? not sure but I think this might damage the servo?
this ia all set up on a 4 function radio

any assistance is appreciated

charles

[novagator]

You should be able to

You should be able to reverse the servo, at least on my radio you can. However, are your front and rear planes on seperate servos? I hope so, because the boat won't work right if they are on the same servo, also they need to move at different rates for the sub to perform right because they pivot the sub about the center of gravity, not the center of the boat.

[JWLaRue]

Okay, dumb question time......

Why are

Okay, dumb question time......

Why are you looking to slave the bow and stern planes?

It is a more common practice to set up the stern planes with a pitch controller (with or without it being connected to an active channel) and only use the bow planes for controlling depth.

I suspect that putting the stern planes on 'rise' won't have any appreciable effect on dive time...unless the stern is lifted out of the water, in which case dive time will be worse!

-Jeff

[bigdave]

If you can do it,

If you can do it, Just move the linkage to the other side of the servo. The plane will move the other way.

[boatbuilder1]

I have two servos one

I have two servos one for each set of planes but they are on a Y cable only 4 function radio
1 motors
2 rudder
3 planes (both sets)
4 ballast control

I usually set up a 4 function radio like this and I do get better dive speeds but in this particulay boat, old rocky mountain ship yard 1/48 type XXI the tail is so narrow I had to make an unusual set up to eliminate slop and binding
I thought there was a y cable with rversing circuit available but to date I have not found one
ca

[boatbuilder1]

found it, its a jomar

found it, its a jomar product

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXAFN2&P=0

ca

[JWLaRue]

Chuck,

You could just steal power

Chuck,

You could just steal power from one of the servo channels and run the pitch controller on the stern planes without using a channel.......

-Jeff

[boatbuilder1]

in other words no signal

in other words no signal to the apc just power to let it do its own thing

[JWLaRue]

yup.

yup.

[tmsmalley]

Jeff's right. I do that

Jeff's right. I do that on my type XXIII. Bow planes are run by the transmitter stick, the stern planes are plugged into an APC and the APC is plugged into an unused channel on the receiver. Works like a champ.

This was suggested to me by the dearly departed Skip Asay -former RC sub illuminati...

(Just kiddn' Skip. You'll always be an RC sub big shot!)

[rcher]

Bob, I used to reverse

Bob, I used to reverse my servos myself. Just required switching the leads on the pot and the motor. These days tho, the servo motors are now usually mounted in SMT boards so it would make it a little more challenging.