Smart Fly Optical Kill Switch

[pepatrick]

My first big plane was a GP Soucy Extra with a ZDZ 40 in it. It was swinging a nice 20" prop. Being an ID10T...I decided to start it on my own...at full throttle of course. The only reaction I could do was to reach around and grab the wings...prop just inches from my face and arms at full throttle...No one could hear me...but I was screaming like a fool...finally I inched my hand around to the ignition switch right by the leading edge of the wing and cut the igntion switch off. It scared the living you know what out of me...lesson learned...I will never start a big plane by my self...and I double check and tripple check throttle servos. This one was reversed..and could have screwed me up pretty bad...I look back on it now and laugh...never did tell my wife..she would have freaked out.

[ultimate-tony]

	Quote: Originally Posted by ronfurious
	Could'nt you add a program mix to the cut off sw that the throttle stick must be below about 1/4 throttle to enable the cutoff switch. Even if the linkage or servo malfunctions the > 1/4 throttle signal "mix" would prevent inadvertant activation of the cutoff switch while retaining all the benifits of it.

I have the optical kill asigned to a knob in my radio. That way you have to go at least half way through the entire travel of the knob to turn it on or off. It`s slower than having it on a switch but it prevents turning it off if you accidentally flip the switch.

Rgds
Antonio

[superdh]

just orderred a smart fly ignition kill for my next project, thanks for the info guys

[BTerry]

	Quote: Originally Posted by ultimate-tony
	I have the optical kill asigned to a knob in my radio. That way you have to go at least half way through the entire travel of the knob to turn it on or off. It`s slower than having it on a switch but it prevents turning it off if you accidentally flip the switch. Rgds Antonio

This is exactly what I do. I have a helicopter radio and the gear switch is on the right side next to the aileron dual rate switch. I was afraid I would flip the rate switch and accidentally kill the engine. My kill switch is now on the left, on the flap pot. I have to consciously think about killing the engine but it still takes less than one second.

[rcpilot82]

I was going over my plane last week(too clold n soggy for the giants right now) and found out I had a broken terminal onmy "old school" switch and pushrod setup. I was alreaddy switchiing the plane over to cans so i just removed the "old school" setup and ordered a smartfly ign.c/o. the nyrods were going tobe too close to the cans anyway :0. I also decided to swap out my throttle nyrod for a carbon fiber rod to hopefully make the planes throttle responce more linear. I am glad to see good things about the optical kill. this will be my first one.

[bosshoss]

BT,

I have it on my Flap slider as well.

One time I handed my TX to friend, so I could wipe my brow. I never told him about the slider, and when he handed me back the TX he pulled down on the slider..............


DEAD STICK!!!!!!!

OOOPS...........

Make sure to put the LED from the Smart Fly in your cowl, with an extension. I like to see the RED Led when I am standing in front of the Prop.

I am going to building a Gasser Heli and want to use of these, but Heli guys on RR are giving me crap about it. Weird.

[reyn3545]

Maybe they should take a different marketing spin on the cutoff... how about Stupid-PropBite Preventer?

I had the reversed servo "here's your sign" moment today cranking up my new biplane. Thankfully, it was tied down, and the SmartFly saved me a trip in the house for clean underwear!

I see some very good pilots at the field walking up to their planes after a flight to turn off the ignition switch... I just wonder how long it will be before.....

[Sevans16]

OK, Setup questions. I have a lipo bat, SF reg, SF Opt Kill, Switch with charge jack. What order do they go in? Does the reg draw power or can it go before switch? I know the OK will draw some power.

[KAMELLO]

Another Question about Smart Fly ignition Cut Off

I have a Dx7 spektrum radio, i want to put the igniton cutoff but its possible activated in the Flap Mix 2 switch ?? (flap mix 2 position 2) or only is going be activated in Gear Switch or Aux2 ??

[Rolling Thunder]

	Quote: Originally Posted by Sevans16
	OK, Setup questions. I have a lipo bat, SF reg, SF Opt Kill, Switch with charge jack. What order do they go in? Does the reg draw power or can it go before switch? I know the OK will draw some power.

Battery>Switch>Regulator>Ignitionkill>Ignition

[GooseF22]

	Quote: Originally Posted by KAMELLO
	Another Question about Smart Fly ignition Cut Off I have a Dx7 spektrum radio, i want to put the igniton cutoff but its possible activated in the Flap Mix 2 switch ?? (flap mix 2 position 2) or only is going be activated in Gear Switch or Aux2 ??

THe best way I have found on hte DX7 is to use a separate channel for kill, whether its choke or optical. on the gear switch.....then program the mix switch when on mix 100% gear and when off, then the gear switch works. this way it takes two switch actions to kill it.

d

[KAMELLO]

	Quote: Originally Posted by GooseF22
	THe best way I have found on hte DX7 is to use a separate channel for kill, whether its choke or optical. on the gear switch.....then program the mix switch when on mix 100% gear and when off, then the gear switch works. this way it takes two switch actions to kill it. d

Thank you goose for the info

[jengoe]

I started my CAP 232 for it's first flight, all was working well then the exhaust fell off [DUH], this meant the engine revs were increased and my flight instructor landed her after killing the engine with a SMART FLY optic kill I had fitted.

In addition my servo throttle failed 1/3 open when started on the ground and the kill switch was a very simple and safe solution to this issue.

Lesson learnt, NEVER fly a gasser without a kill switch as it's just dangerous.....

[imhooked]

Ok, newbie question. What's wrong with using a servo on the choke? Serves the same purpose as the kill switch doesn't it?

[CSpaced]

There's a couple of differences between using a servo on the choke and the optical kill switch. You can set the kill switch so that in the event of radio signal loss, it will kill the engine. Its also solid state, no moving parts to fail such as servo gears and pushrods. Also, cutting the ignition kills the engine instantly - closing the carb can take a few seconds for it to sputter out.

Its personal preference, and I'm sure you will read arguments from both sides of the fence