Site hosted by Build your free website today!

Sig 4*40

Wing Area:

604 sq. in.
Wing Loading: 25.7
Motor: Hacker B50 11XL Geared 5.2-1
Prop: APC-E 15x10
Cells: 24x3000nimh
Amps: 30
Ready to Fly Weight: 108oz
Watts Per Pound: 100

This is the Sig 4*40 built with a B50 11XL Hacker Motor geared 5.2-1, Hacker Master 30 cell 48 amp ESC, 15x10 APC-E prop, 4 Hitec HS-85BB servos, Hitec SuperSlim receiver, 550mh receiver battery, and 24 3000nimh cell flight pack. The all up weight can in at 108oz to give me 100 watts per pound.

This is all of the wood that was either replace or removed from this kit.

This is the replacement wood, a 6.9oz savings.

I pushed the elevator and rudder servos back into the tail to make room for the flight pack.

I am using Hitec HS-85BB micro servos to save weight.

The wing is a quick build with standard construction. 

The only thing I changed with the wing is to move the servos out into the 4th rib bay and open small holes for the wires to go through.

Before I glue the top turtle deck on I add a light ply rail.  The front of the battery will be secured to this rail with Velcro.

To make the battery hatch I glue the turtle deck from F1 to the firewall and from F2 back.  I then make a hatch to fill the gap. 

The fuse is only 8.3oz ready for covering with motor mount and 2 servos installed.

Everything ready for covering.
Close up shot of the motor. I am pushing my luck by using the SonicTronic motor mount but it has worked so well for me in the past an weighs next to nothing.
24 cells is way overkill for this plane but I wanted a plane that could give me 10+ minutes of great performance and all though the wing loading is a little high this plane handles it well.