What size engine do I need?
 

I am building an R/C extra 300 and am about to buy the engine, but im not so sure what to get.
I thinkI should buy a 30. sized brushlessor up engine, by what make shouldI get. I would like to power it electricly

Details:
wingspan= 4.5ft
Lenth with cowling= 42 inches
wieght w/ servos and pushrods but without radio, lipo battery,motor and speed controler. = 1lb 4 oz
width (at largest part) 5 inches.
Servos: 4.5v 1.5kg torque

I would also like to know what speed controler and batteyI would need.

Thanks

Oscar

RE: What size engine do I need?
 

Try the following as a guide:

Motor - DualSky 3548-5, AXI 2826-10, Hacker A30-10XL
ESC - 60A, Turnigy Plush ones are nice, cheap and good.
Batt - 3S 2,500 to 3S 3,000 or 4S 2,500 to 4S 3,000
Prop - 13x6.5 - 14x7

If you build your plane really light you can get away with a 3S set up even, esp if you are not going to fly hard 3D. :) Mount the motor then plane the batts to get the recommended CG and then decide where to build the battery tray.

RE: What size engine do I need?
 

Thanks.

You wouldn't know, what chargerI wouldn't need for the lipo battery,I won't need a multi selcetor one, asI am not charging multiple batterys

RE: What size engine do I need?
 

Isn't there a well known brand that does whatI wan't (engines wise)? I knowI could over power it for £30. How much toque do i need to get from a motor etc.