ORIGINAL: Reko
I have a model with a Titan SG 23 (zenoa) gas engine where the ignition severely interferes with the radio equipment. I have done anything I possibly can do to reduce possible problems with the installation but interference persist. The range is verry low when enginen is on. Maybe 1/5th of the normal range. I still have not flown the model due to this.
From tests I have concluded that the interference mainly comes from the servo wires (wich are a bit long). The next thing to try is electrical filters on all the servo wires. I’m looking for ideas on what to use here. I would be happy if I could get advice on both how to solder my own filters and what type commercial filters there are.
I understand the interference can come two ways. One is through the servo wires and into the receiver. The other is through the wire and directly to the servo causing the servo to have some stochastic behaviour. Should there perhaps be a filter in both ends?
I’m happy for any advice I can get.
/David
David,
There are a list of things I do when installing a gas engine.
I think if one follows these steps then the chances are the radio noise/interference becomes much less.
*receiver batteries, all the switches and all the servos must be atleast 30cm or 12" from the engine, more fare back is better.
*a resistor plug and resistor plug cover must be used, or the metallic type as it was on the old 3w:s
*the ignition wire must be shielded or for R/C use or better wrapped all the way with copper/ aluminium tape
*the firewall should be covered with thin aluminum sheet or something similar
*every metallic joint should be fastened and glued so that it can not vibrate and cause the radio noise.
*excessive vibration caused by a unbalanced prop or prophub, or rough running engine can also cause radio noise
If nothing helps then I think a conversion to electronic ignition will do it.
I know CH ignition is great as I have used it but I have also heard very good things about Runtronic which is locally available in Sweden.