I've already had bad luck with having any part of my wiring exposed, so I have decided any method involving having a wire exposed is bad. Eventually it will short something.

This is very simple and clever solution.

Zb/Esprit Model

http://www.espritmodel.com/jeti-cz.aspx

The Jeti Model AFC connectors eliminate the flashes often witnessed when connecting controllers and battery packs. Available in 4mm and 5.5mm variants the female plug sports a SMD resistor that does away with the usual flashed that occur during connection and that can harm the surface of both the male and female plug. The sets contain two male connectors, a usual female and an AFC female connector together with red and black shrink wrap.

Replace your existing connectors or install inline between your existing connector and speed controller for eliminating connecting flash spark.

The problem with any of these Antispark setups is that once the ESC is Armed, one has to wait until the Canopy is installed, fly, land, and then remove the Canopy before Disarming the ESC.

My canopies are held in place by screws. I do not like having the ESC Armed while I am attaching or removing the Canopy. I prefer to have a Momentary Switch make the connection through the Resistor and then connect the Red wire between the ESC and the battery.

With 12S 8000mah packs, I use CC 6.5mm Bullet connectors and 10ga wire. I mount the female Bullet connector into the side of the fuselage and run the Red wire, from the battery to the ESC, through the side of the fuselage, and then make the connection, externally, after the momentary switch is pressed.

If my Canopies had quick release latches, I would use the jumper wire with the resistor inline.

This style of spark arrestor has been around for some time. I have been using this method for over two years on all of my setups using 6S or larger.

Picture of my Turnigy 80A ESC in which I use a 20 ohm resistor for 6S.

HobbyKing has been shipping their Sentilon 100A ESC (picture 2) with the built in spark arrestor using this style for about a year. On my older Sentilon ESCs I use a 30 ohm for 10S and 12S.

Nice, I bought an 80 amp Turnigy marine speed control about a year ago and it wasn't wired that way. Glad to know they changed it (assuming they are the same thing).

Originally Posted by Buschbarber

The problem with any of these Antispark setups is that once the ESC is Armed, one has to wait until the Canopy is installed, fly, land, and then remove the Canopy before Disarming the ESC.

My canopies are held in place by screws. I do not like having the ESC Armed while I am attaching or removing the Canopy. I prefer to have a Momentary Switch make the connection through the Resistor and then connect the Red wire between the ESC and the battery.

With 12S 8000mah packs, I use CC 6.5mm Bullet connectors and 10ga wire. I mount the female Bullet connector into the side of the fuselage and run the Red wire, from the battery to the ESC, through the side of the fuselage, and then make the connection, externally, after the momentary switch is pressed.

If my Canopies had quick release latches, I would use the jumper wire with the resistor inline.

Actually I have this problem. I have a couple of SPA planes, they require some sort of plug on the outside of model. I plan to use something comparable to the following:

http://www.rcdude.com/servlet/the-24...h-Spark/Detail
http://www.espritmodel.com/flight-ar...-100-150a.aspx

Basically I would either use the arming switch from rcdude (with spark arrestor), or use the arming switch from esprit (and add a spark arrestor) or just use the esprit bullet (with spark arrestor). I have not made up my mind yet.

Can someone tell me say for a Quadrotor, with 4 ESCs each having 440uF, I need to multiply that by 4 in order to calculate the resistor? I'm running on 4S 6900mAh. How many watt resistor do I get?

Is there no one else?? *shouting*

prodriverex,

You really dont need a spark arrester when using a 4S battery. I don't use them unless I am running 6S or higher.

But if you really want one, use 5 to 10 ohms. Be sure to use a flame proof resistor. Saves a fire in the plane if you hit the throttle before the main power lead is plugged in.

Yeap i know.. the spark is nothing like the 6S. But just to be sure.. I have system for 6S and 12S too. And soon to be built, 6S Octocopter, and 8 ESCs..

Ok here's my contribution:
http://www.rcgroups.com/forums/showp...5&postcount=43

Very compact way and fast method. Too bad I cannot patent this right? Maybe Dean can make a new model for us!

Manage to do up a 2nd set today and it was better this time. more compact and neat.

Originally Posted by wildnloose

To me, the bullet connectors from esprit models seems to provide the simplest method of preventing the spark.

http://www.espritmodel.com/jeti-afc-...s-4mm-75a.aspx

But, I'm cheap, and a simple resistor on my current bullet connectors will suffice.

These are just what I was looking for. good thread!

This is what I make for my Jets. The pic shows a 6.5mm bullet with a copper wire that is formed just to the outside perimeter of the bullet. I have two legs coming off it which is under the heat shrink. One leg is directly soldered to the resistor that is soldered to the ground power wire. The other leg is isolated with heat shrink and locks it all together. To connect my 6S or larger you first connect the plus bullet then just touch the ring with the ground bullet for a second or two then make the final bullet connection. Works great and takes up no space. I just touch the copper wire on an angle then pivot up and in with the ground. Simple, cheap and bullet proof if you pardon the pun.