Weird glitch.
12-26-2009 | 08:14 PM
#26
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From: Sterling , CO
RE: Weird glitch.
You may watch, your throttle will respond to a signal and the rest will just twich a little . Not anough to notice. I have seen a lot of set ups that are cloberd in a plane and never have a problem. I don't think it is your throttle cable, or set up might be wrong
The first thing you would notice is the throttle
Larry K
The first thing you would notice is the throttleLarry K
12-27-2009 | 12:58 AM
#30
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RE: Weird glitch.
Gary, solder a short brass threaded adaptor on the end of your throttle cable. Then put a ball on the trottle arm and a nylon ball socket on the threaded adaptor. That islolates any metal to metal contact on the throttle linkage.
It is susprising how little mettal to metal contact causes problems. I fount that touching a long screwdriver to the idle mix jet would cause glitching of the throtle and some of the surfaces as well. Not on all planes, but some.
Make sure your antenna doesn't have any tight turns in it. That may agervate the problem.
Don
It is susprising how little mettal to metal contact causes problems. I fount that touching a long screwdriver to the idle mix jet would cause glitching of the throtle and some of the surfaces as well. Not on all planes, but some.
Make sure your antenna doesn't have any tight turns in it. That may agervate the problem.
Don
12-27-2009 | 01:04 PM
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From: Houston, TX
RE: Weird glitch.
ORIGINAL: DAN REISS
Garry, It looks like your receiver antenna is running right next to and parallel to your battery wires to the receiver for a few inches. That is a very bad layout. That will lead to a lot of coupling you don't want. Get them separated by as much as possible. Dan.
Garry, It looks like your receiver antenna is running right next to and parallel to your battery wires to the receiver for a few inches. That is a very bad layout. That will lead to a lot of coupling you don't want. Get them separated by as much as possible. Dan.
That fixed it Dan. I moved the battery lead away from the RX antennea to the other side of the fuse and the evil glitch went away.
Thanks guys.
12-27-2009 | 01:13 PM
#33
RE: Weird glitch.
Hi!
When looking at your picture I see something that you must fix if you want to keep your plane .
The servos cannot be screwed to balsa longerons!!!!
Instead use 3mm plywood and a router bit in a Dremel to make more sturdy servo trays.These 3mm plywood plates is then glued to triangular balsa stock and then glued to the fuselage sides.
Never ever ever just glue a longeron directly to the fuselage wall. The end grain in the longeron will not provide enough surface area to hold the servos in place when the fuselage sides move under load, and also...balsa is to soft to hold the servo screws in place.
Never ever use metal to metal clevises.
Check your servo potentiometer!
When looking at your picture I see something that you must fix if you want to keep your plane .
The servos cannot be screwed to balsa longerons!!!!
Instead use 3mm plywood and a router bit in a Dremel to make more sturdy servo trays.These 3mm plywood plates is then glued to triangular balsa stock and then glued to the fuselage sides.
Never ever ever just glue a longeron directly to the fuselage wall. The end grain in the longeron will not provide enough surface area to hold the servos in place when the fuselage sides move under load, and also...balsa is to soft to hold the servo screws in place.
Never ever use metal to metal clevises.
Check your servo potentiometer!
12-27-2009 | 02:58 PM
#34
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From: Alberta,
AB, CANADA
RE: Weird glitch.
Some good info here!! I also hit a glitching problem once in the air, turned out to be one loosened engine mount bolt, thankfully got the plane down, but it was one heck of a ride. Doesn't take much metal vibrating against each other to cause havoc.
flynte
flynte
12-27-2009 | 03:11 PM
#35
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RE: Weird glitch.
Thanks for the thanks. I'm glad that solved your problem. One of the guys at my field had the same situation and after he had us scatter in the pits a couple of times, he finally landed the plane in one piece, luckily. A quick look inside revealed that he had his antenna tangled up with his servo wires. As soon as I cleaned up his layout, there were no more problems. Dan.
12-27-2009 | 04:51 PM
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From: Houston, TX
RE: Weird glitch.
ORIGINAL: jaka
Hi!
When looking at your picture I see something that you must fix if you want to keep your plane .
The servos cannot be screwed to balsa longerons!!!!
Instead use 3mm plywood and a router bit in a Dremel to make more sturdy servo trays.These 3mm plywood plates is then glued to triangular balsa stock and then glued to the fuselage sides.
Never ever ever just glue a longeron directly to the fuselage wall. The end grain in the longeron will not provide enough surface area to hold the servos in place when the fuselage sides move under load, and also...balsa is to soft to hold the servo screws in place.
Never ever use metal to metal clevises.
Check your servo potentiometer!
Hi!
When looking at your picture I see something that you must fix if you want to keep your plane .
The servos cannot be screwed to balsa longerons!!!!
Instead use 3mm plywood and a router bit in a Dremel to make more sturdy servo trays.These 3mm plywood plates is then glued to triangular balsa stock and then glued to the fuselage sides.
Never ever ever just glue a longeron directly to the fuselage wall. The end grain in the longeron will not provide enough surface area to hold the servos in place when the fuselage sides move under load, and also...balsa is to soft to hold the servo screws in place.
Never ever use metal to metal clevises.
Check your servo potentiometer!
Something to note on your servo mounting. I belive you may have the mounting screws over tightened and squishing those rubber grommets too much and after looking at my pic, I might be too!
12-27-2009 | 04:55 PM
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From: Houston, TX
RE: Weird glitch.
ORIGINAL: DAN REISS
Thanks for the thanks. I'm glad that solved your problem. One of the guys at my field had the same situation and after he had us scatter in the pits a couple of times, he finally landed the plane in one piece, luckily. A quick look inside revealed that he had his antenna tangled up with his servo wires. As soon as I cleaned up his layout, there were no more problems. Dan.
Thanks for the thanks. I'm glad that solved your problem. One of the guys at my field had the same situation and after he had us scatter in the pits a couple of times, he finally landed the plane in one piece, luckily. A quick look inside revealed that he had his antenna tangled up with his servo wires. As soon as I cleaned up his layout, there were no more problems. Dan.
Whats weird is how it only happened when the motor was running. I wonder if this was a combination of isssues like everyone else suggested, vibration, the throttle rod, metal to metal etc?
This was a learning experiance and I hope others have learned something also.
12-27-2009 | 05:38 PM
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From: Mount Laurel,
NJ
RE: Weird glitch.
I was having a lot of "uncommanded input" problems with my Tiger2. It would roll and pitch ubruptly while flying straight and level. Ireplaced the radio, same. Replaced Rx. same. One day the plane was on the starting bench, engine running, and ALL the servos went crazy. A friend looked it over after I shut it down and found my EZ-link on the throttle. He told me to get rid of it. Idid and the problem went away.
Ihad used that system on all of my planes, and all of them would suffer the intermittent "twitches." 3 of them went in the trash because of it. Idon't use it any more. LOL
Ihad used that system on all of my planes, and all of them would suffer the intermittent "twitches." 3 of them went in the trash because of it. Idon't use it any more. LOL
