I lost the bind plug for my new spektrum radio. Suggestions on how to make one or order another?
Thanks,

I think the binding plug puts a short (grounds) the signal to to ground or the negative (black or brown) lead. This signals the RX that a binding is requested. You can use a small, single strand wire, stripped at both ends and bent in the form of a U, to do the same thing.

DS.

seems thats all it does just makes me a bit nervous shorting them out. guess i'll check the hobby shops see if they have one i can borrow. Unless someone else has some more info they can share on this.

Well, I've done it and it works. All the binding plug is a wire through a holder and a string to attach it to your TX (which is what I did with my binding plug, btw). You can take an RX plug (servo connector) remove the middle lead, and solder the ends of the two outter leads and you got a binding plug.

Dick.

Yup What CG said.

Thanks, work great. now Iam putting a 46 evo on a lt 40 a guy gave me. How far off the firewall do i mount it?

Depends on your CG. Do the engine last. Get everything ready to go, your battery placed, and so on, put the wing on, then set the engine placement on the rails based on where you want the center of gravity to be. Some plans/instructions tell you how far the prop washer/spinner back plate should be from the firewall. This is a ballpark placement because that assumes a certain engine plane combination.

If you do as I suggested, you can then put the engine where it will do some good with your CG configuration. Follow manufacturers notes on how much nose weight you need and see how this method works out for you.

DS.

Thanks, that makes the most sense. I have not plans so if someone knows the balance point that be helpful. Also any suggestions on building a fixture to balance?

You may be able to find the manual on-line. If so, it will tell you how far back from the wing Leading Edge to measure your CG. You don't really need a fixture to do that. If low wing plane, put a line at the CG on top of the wing using a magic marker (you can use alcohol to remove it later) on both the left and right wing. Turn the plane over and put your finger on that line and see if it is sligtly nose heavy. If not, move the engine more forward and try again. If to nose heavy, move it back a smidge. If you have the engine as far forward as you can get it, then you will have to move the battery forward to help achieve that proper CG. If all else fails, nose weights (sticky lead weights available at your local hobby shop or at a tire shop (stick on wheel weights) will work, but less desirable (adding nose weight that is). You can also get away with a weighted prop spinner/nut. I believe Dubro makes one that is about an ounce or two in weight that works fine. If you go that way, make sure you get the right thread, by the way.

This also works with high-wing planes, just put the line on the bottom of the wing and do it that way. You should have a slightly heavy nose plane. You can adjust the CG as you wish later after you get some time on that plane. For instance, some 3D'ers want it slightly tail heavy.. but be very cautious. Tail heavy planes can be a handful. They take off just fine... but landing, well, that' often done by picking up the pieces. Slightly nose heavy will result in a smooth approach and landing as well as better overall handling while in the air.

Best of luck.

DS.