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Model Forum / Radio Controlled / Helicopters / September 2005Raptor 50 near crash
Just thought I would share my stupidity, I got chance to have a little practice today only my second flight with my new Raptor, and the engine started to sound a little strange and then as I got it near the ground it cut out, leaving me to land with a bit of a bump on grass though, The fault was the heat shielded extention wire for the glow plug I had run this between the carbon fible bottom frame and the engine head, trying to be neat and tidy, (wrong) it took two flights to burn through it, just thought I would share that one with you all :-( Rob > Just thought I would share my stupidity, I got chance to have a little > practice today only my second flight with my new Raptor, and the engine [quoted text clipped - 6 lines] > > Rob why would a cable carrying no current cause your engine to cut out?? you only heat the glow plug with this cable to start it Should have said the cable shorted to earth of the engine causing I can only assume the plug to go to ground and kill the coil within as ground path would be to great to maintian the heat glow. Xe.6102$6p.2545@newsfe4-gui.ntli.net... >> Just thought I would share my stupidity, I got chance to have a little >> practice today only my second flight with my new Raptor, and the engine [quoted text clipped - 9 lines] > why would a cable carrying no current cause your engine to cut out?? you > only heat the glow plug with this cable to start it > Should have said the cable shorted to earth of the engine causing I can > only assume the plug to go to ground and kill the coil within as ground [quoted text clipped - 15 lines] >> why would a cable carrying no current cause your engine to cut out?? you >> only heat the glow plug with this cable to start it There is no way that shorting the plug out would cause it to fail. Even if there was a battery connected, the damage would be limited to the battery and/ or the wire between the battery and the short.  SignatureAdrian Smith www.YourStadium.com Superb aerial pictures of UK football stadiums. >> Should have said the cable shorted to earth of the engine causing I can >> only assume the plug to go to ground and kill the coil within as ground [quoted text clipped - 20 lines] > Even if there was a battery connected, the damage would be limited to the > battery and/ or the wire between the battery and the short. he needs to be looking elsewhere for a engine failure apart from the lead it may be the plug but not by shorting out of the plug lead You are both very correct. I assumed the lead was the fault, the failure has developed today into the engine has blown a hole in the piston. I have been having problems for a long while with erratic engine operation with my old Concept 60, this has now started to happen with my new Raptor, I'm thinking that its my fuel rig which has old rubber piping, at least 15 years old, I hadn't until today that the smoke from the engine was disappearing intermittent, and also when I first got the engine it used to start perfect and recently its been hard to start and it stopped ticking over without having to input a couple of clicks on the throttle, all in all I going to renew my fuelling setup and clean my concept engine and send the new raptor engine back to supplier for repair and hope they can confirm why it failed. I will also start to use fuel filters. Rob >>> Should have said the cable shorted to earth of the engine causing I can >>> only assume the plug to go to ground and kill the coil within as ground [quoted text clipped - 24 lines] > he needs to be looking elsewhere for a engine failure apart from the lead > it may be the plug but not by shorting out of the plug lead > You are both very correct. I assumed the lead was the fault, the failure > has developed today into the engine has blown a hole in the piston. I have [quoted text clipped - 8 lines] > send the new raptor engine back to supplier for repair and hope they can > confirm why it failed. They'll probably confirm it was running WAY too lean and send you a bill for their efforts. I'd just buy myself a new piston and loner, re-build the motor and learn how to asjust the mixture so it doesn't do it again. And will you PLEASE post at the bottom? SignatureBeav Reply to "beavis dot original at ntlworld dot com" (with the obvious changes) |
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