Are 2.4 rec. immuned to gas engine ignition noise, as long as I keep the rec. away from the engine? Should I also keep it away from all ignition related stuff, switch, wireing etc.?

Matt

You will get many different answers to this question, but in most if not all the answer is yes. There will always be the exception but in most cases it is a fault of setup or equipment problems such as loss caps on the plugs. Dennis

Yes, sometimes, but much less then any of the 72.

Run NKG plugs not Champions.

THANKS EVERYBODY, THANK YOU VERY MUCH.

Matt

I still follow standard gas installation methods.
Edwin

To be safe and sure keep the receiver and any servo plugged into it at least 10" from the ignition module or magneto.

I don't understand how the frequency or coding makes a difference when you can get a servo to jump from spark ignition without the reciever.  The interferance is not always at the reciever.

The servo can pick up the noise and transfer it to the RX. 2.4 depending on the brand will shift fequencies within the band when noise is detected or constantly shifs so it masks any issues you may have. Even with 2.4 you need to follow the same tried and true guidelines when setting up an airplane. Keep the RX and it's power source a minimum of 12" from the ignition and it's power source. Keep the throttle servo at least 8" from the ignition. Do not use a metal pushrod for throttle. Follow the manufactures reccomendations for antenna installation and range check. Mostly, make sure your 2.4 RX gets a solid 6V no matter what the servo load is.

Looks like most things have been covered here, its a real good set of guidelines, and no 2.4 is not immune to interference from outside or within your model.

Are 2.4g Rx's made different for aircraft (other than the number of channels) than for cars or boats?

anyone?

"Are 2.4g Rx's made different for aircraft (other than the number of channels) than for cars or boats?"

The 2.4Ghz is the same. The receivers for marine have different antena orientation, due to the water surface/RF link.
Hope this helps.

-Snuts-

Exactly Sport_Pilot!


No!!!! They are not immune! They are less susceptible but they are not immune. Interference from an ignition module can enter the rx system through servos, wires, pushrods, ect. Interference can distort the “rx to servo signal” without distorting the “transmitter to receiver signal” thus this can happen on 2.4 or 72mhz

Ok then. In that case, here is my input on this subject. Now I don't have a gs gas plane yet, but I do have a large scale boat and truck, both with modified 26cc gasoline engines. Now in the boat, the receiver, kill switch, power switch, battery, throttle and rudder servos are ALL within 6" of the magneto of which the engine turns over 19,000 rpm and the Rx antenna just wrapped around the inside of a wood radio box. Itpicks up NOinterference at all from the ignition. Now gas airplane engines run between 7-9000 rpm with an electronic ignition. There is no way your gonna getany interferencefrom that, so I disagree with everyone and their ideas of keeping everything so far from the engine. Here's another one for you...I run a 2-56 steel pushrod to the throttle linkage. Im going on year 4 with this setup and have yet to experience one glitch.One time, by accident,even had the Rx bouncing around the inside of the radio box for 15 minutesduring arace and that didn't effect anything, so I guess the mounting of receivers on foam or wrapped in foamis unnecessary too.

Johnnysplits, Snuts here:
I was posting in relation to the general question presented by the original poster.
You have a very spacific installation (with no details). Which receiver are you using? I imagine your ignition wire to your plug is factory shielded (again no details).

I do fly Giant scale planes (nothing bigger than 100cc yet). I too install rf conductive pushrods, servo's within 3 inches of motor, and ignition module. Never have had any rf problems. I do seperate my magneto type ignition systems from my flight electronics. This is carried over from my gassers, early 1990's and FM (later PCM) radios.

I may edit my earlier post:
In resurch, I learned Spektrum offered marine spacific receivers to overcome potential of rf problems due to skip on water surface.

THIS IS NOT INTENDED TO BECOME A BRAND WAR!

Again I hope this may help.

-Snuts-

Well digital encoding ensures that "glitches" corrupt the packet thats sent to the reciever. If the packet doesn't pass a validity check then it gets dropped and the servos don't get a position update from that packet. Enough failed packets and the system goes into failsafe.

Also, the systems operate well above the freqencies generated by rubbing metal and other common causes of 72mhz "interference" so while they are not "immune" they are much more "resistant"