When I bind my DSM radio with my 50cc gasser, should the Opto Kill switch on the Transmitter be in RUN or KILL? I can see advantages to both.

Thanx<br type="_moz" />

I bind with opto switch to run and throttle to low.

That way if you lose signal then regain it you still have power.

No doubt others will have difference ideas!

Terry

I bind to KILL

Safety first.

I know I'm just a crazy Futaba guy,, but why would it make a differnce when you "bind",, don't you set the failsafes seperately??

Nope, fail safes are set during binding, not in a transmitter menu.

Must be a Spectrum thing, I fly airtronics and failsafe is a seperate function after binding. I'm using an Rxcel kill switch and it kills the engine on signal loss or tranmitter switch.

After what happened to me Saturday, I stand by what I said, failsafe to kill.

It does not matter when or how the failsafe is stored in the receiver's memory. For Spektrum and JR it is done during binding, for other manufacturers may have different ways of setting failsafe. The bottom line is that failsafe is not there to save the aircraft. Failsafe is there to minimize damage on the ground potentially caused by the aircraft. Most helicopter pilots understand this concept and accept it. it is not easy to accept this concept, specially when your pride and joy's price starts going into the 4 figures.

Why do you have a separate kill device on your aircraft? And how does it know that your receiver lost signal if the failsafe is set to lower the throttle? Wouldn't that be a command from the receiver? How does the kill switch know that the receiver lost signal? I'm not trying to be a smart @$$ just trying to use some logic on your set-up.

Rafael

Actually you're right, with Futaba you do have to set the failsafe to kill the optikill, same way you'd set the throttle position or anything else, or when the RX looses power it will shut down. Sometimes you're lucky and when you plug things in the default setting are so it will shut down. Depending on what Rx channel you use you make have to set it manually though, I found this out by surprise while in my p-47 I had it on the flap channel, it just held position when the Tx was turned off.

I was talking with my Buddy about how to bind JR/spec

I guess the only potential down side is if you swap RX with an already bound RX for some reason, you have to remember to re-set your failsafes,, with futaba the TX tells the RX what to do constantly or on power up?? Both systems work fine I guess

If you swap a receiver without making sure all the settings are correct, including re-binding to the radio, you deserve the results, no matter what manufacturer you use.

Rafael

Why is simple, its a way to kill the engine immediately from the transmitter without depending on a servo.

It senses the pulse on the channel, if the pulse is one way the switch is armed, if its the other way it kills the ignition. Loss of signal would send that channel pulse thats set by your fail safe (or bound position if spektrum) which if you have any sense, is engine killed.

If the switch looses signal completely it defaults to kill engine.

I understand how they work, and I am thinking of using one on my big planes. It would be a secondary way of killing an engine other than a throttle servo.

But how does the switch sense a loss of signal when there is a failsafe pre-programmed at the receiver end? I mean, If the receiver goes to low throttle during a failsafe event, how does the switch know that the receiver went to low throttle because of a loss of signal? That is the part I do not understand; the automatic part. I would definitely program the failsafe at the receiver to activate the channel to kill the engine via the opto-switch, but raptureboy said that the switch reacts to singal loss as a feature of the switch not a feature of pre-programmed failsafe. Am I totally off base here?

Rafael

How would swapping RXs affect anything,, the TX is where all the setting are stored,,, except apparently the Fail Safe in the JRs

The switch doesn't sense loss of signal to the RX, Because there is no loss of signal to servos or optikill switch in a fail safe scenario, it senses loss of RX power or what ever the Failsafe function tells it to do.

On loss of signal the received sets the output signals on each channel to the position programmed as part of the bind process. If <OFF> is the failsafe position programmed for the channel the opto switch is on, the switch will be turned off.

Terry

That is the same way of thinking as when we used 72mHz. If you want to play that way, is up to you. I stand behind my statement, no matter what manufacturer you use.

That is the way I understand it. You program the failsafe to activate the kill switch on the event of a signal loss. But raptureboy said the following, and It did not make any sense. Maybe he does not know how failsafe and his switch work with each other. Or maybe I'm reading too much into it...
Whatever... lets go fly.....

Rafael

It pretty simple,,

The Binding and or Re-Binding sets the failsafe parameters on JRs,,

The Failsafes can be set and changed at any time via the TX on Futaba and aparently Air.,, it has nothing to do with the binding process.


p.s.
people keep using the term "loss of signal",, the only time the optikill looses signal while in a RX with failsafe function activated is if it "looses power",, when it looses power Yes it looses signal
I think we're arguing semantics a little bit.

The switch doesn't know there's a loss of signal. The reciever knows there was a loss of signal and applies fail safe position to the servos (well the channel outputs in any case). The kill switch is connected to an aux channel on the reciever, that channels fail safe position is sent to the opto kill in a loss of signal event, which if you programmed it correctly, is engine OFF.