http://www.youtube.com/watch?feature...&v=u7ikgrI3fDM

Skywing 48" Information
Possible Motors:

Omega 130
http://www.3dhobbyshop.com/Omega-130...r_p_15517.html

Exceed rocket 3020-860kv
http://www.hobbypartz.com/86mb27-rocket-3020-860kv.html

Sunnysky 2820-800 (4s?) http://epbuddy.com/index.php?main_pa...roducts_id=187

SunnySky 2820 KV 920 http://epbuddy.com/index.php?main_pa...roducts_id=188
14x7 ESC (6v capable): http://www.quantumhobby.com/product-p/b-ztw65asbec.htm
Programming Card http://www.quantumhobby.com/product-p/b-ztwescpc.htm

Motrolfly 2815
http://www.subsonicplanes.com/Motrolfly_Motors.html

EF Torque 2814/820 motor
http://www.extremeflightrc.com/html/torque.html

Hengli W3542-850
http://www.bestvaluerc.com/shop/shopexd.asp?id=351

AX AX3715-820
http://www.bestvaluerc.com/shop/shopexd.asp?id=308

Hacker A30 16M Motor V2
http://www.espritmodel.com/hacker-a30-16m-motor-v2.aspx

Hacker A30-10XL
http://adchobbystore.com/Hacker-A30-...otor_p_37.html

Scorpion SII-3020-890KV
https://www.hobbyking.com/hobbyking/s...FYlfpQodGUMAzA

SERVOS:

Digital Solar Servos: D654's - 6v & D658 on elevator

the easiest way to figure what you need is to run the math... the plane is around 5.25-5.5lb. So figuring it at 5.5lb, most like 3d with around 225 watts/lb. So 5.25*225 = 1181 watts. So around 1200 overall watts is a good target to start with.
1200 watts on 6s is 1200/22.2 = 54 amps. So leaving a bit of headroom, plan for around a 60 amp discharge. If you are buying a 3300mah pack, a 20c one is rated for 66 amps. Plenty.