i just bought a eflite yak profile foam plane now i need to know what engine i should use and servos i already have a jr radio and also do i use the included gearbox or what, this is my first time with any electrics, i have always had gas planes so i will need lots of help thanks.

I have a Park 400 Outrunner in mine. It powers it very nicely. It has powered both of my Yaks. The first one met my mailbox. I figured it was time for it to go to glory. Now, I have one that I have had for about 6 months now. It flies just as good as the old one.

Servos are Hitec and GWS. If I were you, I would just go all around Hitec HS-55's. They are inexpensive and nice.

S40

what about a reciever do i need to use a micro reciever

I'd recommend a Park 370, a TP730 3S, mirco servos, 10A ESC, and a micro receiver to keep it light.

Yeah, I have a GWS Micro Reciever in mine.

what about batteries and charger, does it have to be li-po batts i've read some things about them exploding and catching fire and that kind of worries me. Another thing i'm wanting a good cheap charger.

Battery: Thunder Power 3-cell 2100 mAH.

Charger: Triton Charger.

www.towerhobbies.com

Search "Triton Charger".

That is the best LiPo charger, at least in my opinion.