engine inflight kill
11-04-2005, 09:06 AM
#2
RE: engine inflight kill
Hi Bob,
There are several but I personally like and use the one from SmartFly
http://www.smart-fly.com/Products/Ignition/ignition.htm
There are several but I personally like and use the one from SmartFly
http://www.smart-fly.com/Products/Ignition/ignition.htm
11-04-2005, 09:07 AM
#3
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RE: engine inflight kill
I've been using this "opto isolated e-switch"
http://www.emsjomar.com/SearchResult.aspx?CategoryID=6
I've got a couple of extra ones NIP that I am going to sell.
They have some nice safety features. The switch won't come on unless your rx is on. Also, if you loose power to your rx, it turns the ignition off. It does not cause any interference and has an led to see when the switch is in the on postion.
I've been using them for years. They work good and add very little weight.
Jim
http://www.emsjomar.com/SearchResult.aspx?CategoryID=6
I've got a couple of extra ones NIP that I am going to sell.
They have some nice safety features. The switch won't come on unless your rx is on. Also, if you loose power to your rx, it turns the ignition off. It does not cause any interference and has an led to see when the switch is in the on postion.
I've been using them for years. They work good and add very little weight.
Jim
11-05-2005, 10:17 AM
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RE: engine inflight kill
why not a choke servo? rather than relying on mechanics like a choke close - and I can install an optic switch without worrying about linkage or servo placement. gas engines do funny things like shear prop bolts, loosen on the mounts, and pcm lock...and in those situations mechanics may not work well or at all.
Paul
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Professionally Built RC Aircraft
Corona, CA
Paul
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Professionally Built RC Aircraft
Corona, CA
11-05-2005, 01:55 PM
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RE: engine inflight kill
I have a choke servo AND a Smart Fly kill switch..I know its overkill but what happens if you lose the power to the RX..You will be crashing but how do you shut the igniton off? cant use the the choke servo cause theres no power right? So now instead of smashing in at full throttle or worse yet watching your plane fly off into the sunset I can kill the engine and at least be able to watch it go in!
11-20-2005, 08:39 PM
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RE: engine inflight kill
Josey Wales can you post a pic of your choke and Smart Fly setup? I am finishing off my first gasser a 1/3 Laser 200 and I have been looking to find the best setup for the choke and kill switch combo.
Thanks
Thanks
11-20-2005, 10:43 PM
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RE: engine inflight kill
I like the ElectroDynamics and the Smart-Fly kill. Both work of the same principal and eliminate any electrical connection to the reciever. This can help prevent interference. I am not crazy about the choke servo. Say your engine locks a full throttle and to kill it you hit the choke servo. When the piston goes back down it pulls straight gas, no air at all, into the cylinder. Momentum is going to force the piston back up. When the piston goes back up it hits the fuel in the combustion chamber. Liquids dont compress. So now you are looking at the possibility of breaking a rod or a crankshaft. Not only that, but if you loose radio signal, you can flip the choke servo in the first place. By using one of the two systems posted above, when the reciever looses signal, the kill switch looses power and it kills the engine. In my opinion, they are the only way to go.
