Hey all:


I have read several times about the placement of the ignition box and to use non metal horns, also to place the throttle servo at least 1 foot from the engine.

Isee other's posting there pics here and there NOT folling this rule. Iwas wondering is the Nessary ?

Again, New to gas engines.


Thanks

Take a poll and use the most popular answer?

What radio?

Sorry I didn't mean to give you advice.

bohiaa, here's what a few of the RC manufacturers have to say about the subject. First Futaba:
Guidelines for setting up gasoline engine models.
All ignition equipment, including an electronic kill switch, must be mounted at least 12", and preferably 14", away from all radio equipment, including throttle servos, etc. Ignition kill switch should always be on opposite side of fuselage from radio kill switch. All pushrods going to anything related to the engine must be non-conductive (just nonmetal clevises is not sufficient).

You're always better off listening to the manufacturer than someone on RCU. dan

If you're flying on 2.4 don't worry about recommendations that were written while the authors were listening to thier 8 track tapes.

Yea, I set mine up this way, however I didn't know to put the kill switch on the oppsite side of the ingition box,

Also, I figured I would just use the ignition switch on off switch as a kill switch. Is this OK ?


Thaks again

Yep I have been told if a person is useing the 2.4 radio not to worry much about the tried and proven rules of the old days. Get a interference detector and just see how much RF your getting even with a proper set up, it's still there somewhat. 2.4 just masked the condition just like PCM and while it does work for the most part it can bite you right when you don't need or want it. In my planes I follow old school as close as possible and so far have never had RF issues. Some plane just won't allow the 12-14 inch rule because of size,but I do the best I can to seperate the two items. So it's up to you what you do but I agree with Dan and follow what the manufactures have to say.
BTW I had at one time alot of great music on 8 tracks.

Why do you feel the switch needs to go on the other side?

You "can" use it as a kill switch but you'd be better off using a transmitter activated optical kill IMO

Edit: There's lots of ways to accomplish the same thing in this hobby, do whatever makes you comfortable. Certainly following the old school methods won't lead to you failure any sooner than modern methods.

Answer me this: What frequency does an ignition module with a cracked case or frayed plug wire put out? personally I have no clue and I think it would take a Sectrum Analizer or Network Analizer along with a problematic ignition to find out. That being said, why risk your airplane because you feel the need to dis-prove well documented methods?

Speed, you have to assume that the ignition system, which includes the spark plug, has the capability to generate any frequency from DC to light and you better protect youself from it. It may not be at the frequency that you are transmitting on all the time but all you need is a few seconds of it and you're in. So, assume it's there and follow all your manufacturer's guidelines which are just good RF principles. They know best since they designed the RC system. Dan.

edit

Dan, you may have misunderstood my post. I pretty much preach that you need to keep proper isolation between components. I simply stated my post as a question to hopefully open up some minds. Far to many people think that 2.4 is a cure all for any type of interference. Trust me it is not, I deal with antennas of all typs and frequency ranges for a living yet if the advise is not what one wants to hear it is ignored. Just as well, keeps the airplane manufacturers in China busy.

No. It's not necessary. Like seat belts. Fire extinguishers. Condoms. Designated drivers or liability insurance.

But if circumatances are such that it causes a problem your hindsight won't rebuild a crashed plane. I follow the 12" and no metal-to-metal rule and have never lost a model to a "glitch", "hit, "brown out" or other excuse pilots use.

It's pretty cheap insurance. Usually (I fly mostly magneto) I need to get weight closer to the tail; so a remote throttle servo is an advantage.
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