I need an 8.4v 1100mah battery for my SIG EP-42. The motor connects with a Tamiya type plug. I do have an adapter to connect a deans plug to this Tamiya plug. However, all I see at Tower are "2 pin" plugs.

What else do I need?

I usually keep the stock connector on my batteries, and install the same connector on the plane (ESC). If your batteries have Deans plugs, just cut the Tamiya plug off the plane and solder on a matching Deans connector.

Otherwise, you have to make yourself up an adaptor cord, which involves even more soldering.

Good luck

Also, I am completely new to electric flight. What combination of items would I need to convert this EP-42 to a brushless system? This thing is built a bit heavy as I have HS-81 servos instead of of HS-55, and a Hitec 555 receiver in it, plus the wing is covered with Ultracote instead of the stock covering as I accidently messed up the original. I am thinking the stock brushed motor may barely pull it through the air.

I have had good luck with Turnigy motors from Hobby City. I couldn't begin to tell you which one you need, but they are great motors for the price.

If you go to the Hobby City website, under each motor there is a comment section where people rate them, list off their setups, and post a lot of test data. You can probably find either the same plane as yours, or something close, and copy somebody else's setup.

This is just an example - I do not think that this motor will fit your plane:

http://www.hobbycity.com/hobbycity/s...less_Outrunner

Start with the weight of your plane.

What does it weight now, with the batteries, motor, etc. installed as if were ready to fly.

You can then select the performance you expect, e.g. slow and scale like, sport, aerobatic, etc.

Multiply the weight in pounds by the performance factor.... and you get the wattage requirements for the motor, which narrows down your prop/motor choice...

e.g. assuming a 140 watts/lb performance level...

1.84lbs x 140 watts = 258 watts required from the motor, let's round up to 300 watts.

Assuming 11.1v LiPo packs....

300 watts / 11.1v = 27A current draw fromt he ESC, so let's allow for overhead... a 30A ESC will do.

20C 1800 mAh LiPo packs can sustain 36A draw, but do better around 30A...

So assuming my starting weight, look for a motor capable of 300 watts ~ 27 A, a 30A ESC, 20C 1800mAh LiPo pack, and a prop that causes the motor to produce about 300 watts.

These are very rough figures, but show how you can start to piece things out.

I wouldnt cut off any connectors, just make up the leads you need,,,go to the bay and look up a guy,,Headsuprc,I think he is a dot com too..,got good prices and will help to figure out what you need although opjose did a pretty good job of that already...Rog

For best performance, never use adapter plugs as the impedance of the added connectors seriously use up power. Just a fraction of an ohm can cause a severe voltage drop at high currents the motors require. Pick a good connector design and convert all your batteries and ESC's to use the same type. There will be some discussion of what is the best connector, there are three or four pretty good ones. See what the bulk of the flyers in your area use and go with the same ones.

Thanks for all the replies, esp opjose's. Money is tight for the next few months, then it'll open up a good bit at which point I am going to invest in a nice electric balsa (no foamies) airplane for less hassle flying.