Throttle Kill Switch?
 

Hey Guys, This is my first Gasser and i don't think i could have done my homework better, ( WildHare extra sp & DA-50) ;)

But i cant seem to come across any information regarding what people are doing to kill the engine. My local R/C shop wants to sell me a Fiber optic kill switch from EDI, But i don't want to add any more weight than possible,and the fact it cost $70.00... I want to keep this Bird as light as possible!

Would i set this up the same way as my glows with my throttle cut on my Futaba 9CHP? or would i dedicate a channel for this purpose

thks in advance: Bill

RE: Throttle Kill Switch?
 

I'm using the Throttle cut on my 9Z and it works just fine and I choose the swithc that has a spring on it the one it's also used for training,, and I have set u0p where you have to hold the switch to kill it so you don't kill the engine by mistake!!!,,, and then if you are using a servo for the Choke you can also kill itthat way,, I have my servo on a dial on the radio so you can give it anywhere in beatween from close and full choke!!!

But in 9 month I have only kill my engine with the engine Cut Switch on the radio!!! and it work every time!!!! I think it make no sence to spend that much $$$ on that kind of switch!!!

Good luck

RE: Throttle Kill Switch?
 

If you go to an IMAA event (& the CD is on the ball) you MUST have a positive throttle kille switch. Throttle down is not sufficient. I use the one from Smart fly, works well & very light. On some of my birds, I use a choke servo, that is OK too, however, the choke servo is heavier by far the the smartfly switch. I only use a choke servo if the setup to operate the choke manually is a pain in the tukkus.

RE: Throttle Kill Switch?
 

I put a servo on the choke. Costs about 15 bucks. You can kill your motor and even land it without trouble if your throttle servo quits on you.

Craig

RE: Throttle Kill Switch?
 

Ok so im using on my radio 9CHP Futaba switch H...it has the spring on mine and this is the one i used for glow.. so for my choke what channels are you guys using ?

also: using the choke as a shut off over time wouldn't this cause some damage to the rings and shorten the life span? causing a gummy build up and carbon deposits

RE: Throttle Kill Switch?
 

I use a choke servo too. A small light wieght servo is fine for this application. The Hitech HS 81 is great. Make sure you remove the lock spring and ball from the DA 50 choke though. This way the choke moves smooth. Since you must use the choke to start the engine you want to use any 2 position switch you have. The channel is what ever availible AUX channel you have. Since Channel 9 is already set up for it I would use it. Just adjust the ATV/EPA so you arn't overdriving it.

Shutting off the engine with the choke is used only if you need to. Shut it off normally with a throttle cut. This way you don't have excess fuel in the engine. As for gummy, gasoline doesn't get even close to gummy like glow. Not a real issue if you are flying all the time. :)

RE: Throttle Kill Switch?
 

There are three ways to kill an engine that is accepted practice.
The first is to close the throttle until the engine stops.
The second is to have an additional servo to close the choke cutting off the air to the engine.
The third is to kill the ignition by either grounding out the coil (magneto) or removing the ignition voltage. (the EDI switch you mentioned)

All are accepted practice. I personally use the choke feature to kill my engine.

RE: Throttle Kill Switch?
 

Thanks for the information Guys

Bill

RE: Throttle Kill Switch?
 

I managed to accidentally kill the engine in flight today with a friends Comp Arf. He has one of those damn choke servos set up on a switch by the rate switches. Landed fine and all worked out in the end, but that's precisely why I won't have a transmitter activated engine cut except via the throttle trim. Hit that switch just one time while in a hover and see what you end up with. The only other method I'll use is the ignition switch on the side of the plane. Those two are ALL that is required by the IMAA.

Pat

RE: Throttle Kill Switch?
 

If you have a 9C you could assign the choke to one of the knobs in the center..no way of accidently hitting that!! I also have the SF kill switch..works like a charm..but I like gadgets!!:)

RE: Throttle Kill Switch?
 

He has a 9Z and moved the switch function to different arrangement after that. I STILL won't have one in my planes, though. Other than that had a great time bending the wing tube in a Giles. Walls can be hard on aluminum[X(]

RE: Throttle Kill Switch?
 

I actually had mine on the side slider and one day while flying my engine was running really rough..well I had moved the slider to half-choke and didnt know it..that day I put it on the dial!![X(]

Your Giles??!!

RE: Throttle Kill Switch?
 

Yep, my Giles. Only bent the tube, tho. Still hoping to hear that Tom has finally had his C/F products arrive so I can get one. It was optional, but now mandatory.

RE: Throttle Kill Switch?
 

Yes Pat, you did dead stick my plane. I should have told you where the choke switch was, but "I" knew which one not to touch[X(]

The Giles wing tube has a nice curve in it now, hell I told him just to turn it over and it will bend back soon enough:D

RE: Throttle Kill Switch?
 

My kill switch is that smart fly setup. I have not tried hovering and activating that switch. Maybe if I was over a large soft foam pit.

In theory if you fly PCM and had a lockout you wouldnt be able to activate a kill switch like that anyways. That is unless you program your failsafe to either no throttle, or throttle back. I set my PCM to hold last so I dont get in that hover and then smash into the ground lock out mode. I know this is going to start a whole new debate.

Pat,

Bending a wing tube is nothing, lets see you crack up some wings :) I was playing with a mix of elevator to flaperons to get really nasty walls.

RE: Throttle Kill Switch?
 

All, I use an Electrodynamics Optical kill switch activited using the landing gear 2-position switch on the top back left of my JR 10X. It works great. I think Smart Fly has a very similar one like AirbornSGT uses. Both switches have to be on to run and either one in the off position kills the engine.

Bobby

RE: Throttle Kill Switch?
 

I've managed to bend the tube in all my plnes that had aluminum tubes. I use the same mix you do for those high "G" spectacular walls. Ya know, the ones where the plane goes instantly from horizontal to vertical but continues the horizontal forward motion for quite a ways. BTW, the carbon fiber tubes DO NOT bend!!




RTK, That may be, but I didn't remember which one not to touch!!

RE: Throttle Kill Switch?
 

What mix??[8D]

RE: Throttle Kill Switch?
 

Spoilerons. The ones where the ailerons both go up or down with the elevator and in the same direction.

The only good kill switch is the one mounted on the side of the plane and activated at the plane with your index finger, IMO.