Sail servo

[Andrew WisemanParticipant @andrewwiseman]

I would like to run 2 sail servos and a rudder using only a 2 channel transmitter such as in a schooner, is this possible by using 2 receivers.

[Andrew WisemanParticipant @andrewwiseman]

[60wattParticipant @60watt]

I heard of a 7 foot long model needing two watertight areas.

Two receivers with the same crystal frequency without any problem.

 

Is a modified Y-lead not easier?

[Andrew WisemanParticipant @andrewwiseman]

 Hi, I was wondering if a single receiver would drive more than 2 servos, are these Y-leads ready available thanks for the reply. AW

[Bob Abell 2Participant @bobabell2]

Hello Andrew

 

I use a sail arm servo, with several holes on the arm and connected to the various sails

 

The sails that need to move the farthest are connected to the outermost holes

 

Bob

[60wattParticipant @60watt]

Andrew,

What Bob said.

 

I was wondering if a single receiver would drive more than 2 servos

Multi channel receiver without bec stamp

If the receiver has no bec then there is no receiver problem other than you can’t exceed the receiver supply voltage limit.Futaba receivers are compatible with the 5-cell packs.You have to ensure the receiver pack can manage the current drain of two servos.The three row pin header on a receiver is rated at several amps.

B.E.C. receiver

If the receiver has “bec” then the battery slot takes a fatter red 2 pin plug.The positive from the middle pin in the “batt” slot passes through a transistor before it powers the receiver and the two positive out pins for the servos.The bec transistor of common Futaba receivers is rated at 5 amp

You should avoid supplying well in excess of six volts as this > 6.0 excess voltage x servo current heats up the receiver and can burn out the bec if the product exceeds 2 watts.

 are these Y-leads ready available?

I mean a Y-lead (with one pin removed) to give heavy duty receivers their own supply.The fly-boys with larger models and digital servos occasionaly use Y-leads to split supplies.  I doubt if any special measures are neccessary

[Dave MilbournParticipant @davemilbourn48782]

You can run two sail servos from the one channel as long as you’re happy to have them both moving in the same direction by the same amount at the same time.

If you want to control them independently then you can’t use just one 2-channel receiver.

If this is the case then I would advise you buying a new radio with four channels to save yourself any further head-scratching.

I’d also suggest using a 6v supply for the receiver and servos.

DM

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