SIG Somethin' Extra Kit .40-.46,51.5"

Tower Stock# LH1197  •  Manufacturer Stock# SIGRC76
SIG Somethin' Extra Kit .40-.46,51.5
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Notes from our tech department:
This is the Glow Powered, Radio Controlled
Somethin' Extra Airplane Kit by Sig.
Capable of extreme aerobatics, ideal as a Club Contest airplane.


Construction: Laser cut balsa and ply
Wing: Two-piece with aluminum wing joiner
Aileron Control: Dual servo
Engine Mount: Two-piece glass filled composite
Landing Gear: Pre-formed and pre-drilled 090 hardened aluminum,
tailwheel wire
Wheel Pants: Two-piece plastic
Canopy: Clear molded plastic


All required Balsa and Plywood
Landing Gear
Sig Easy Hinges
Clear Plastic Canopy
Engine Mount
CAD Drawn Plans
Instruction Manual
Hardware Pack


Radio: 4-Channel with 5 standard size high torque servos
Y-Harness: For aileron servos
6" (152mm) Extensions: Two for aileron servos
Engine: .40 - .46 cu in (6.5 - 7.5 cc) 2-stroke OR
.56 - .65 cu in (9.1 - 10.6cc) 4-stroke
Fuel Tank: 8oz (240cc)
Spinner: 2-1/4" (57mm) diameter
Main Wheels: Two 2-3/4"
Tailwheel: 1"
Covering: Two rolls
Prop, glow starter, fuel, building and field equipment


Wingspan: 51.5" (1308mm)
Wing Area: 614 sq in (39.6 sq dm)
Length: 48.25" (1225mm)
Flying Weight: 4.25 - 4.75 lbs. (1928 - 2155 g)
Wing Loading: 15.9 - 17.8 oz./sq ft (48.7 - 54.4 g/sq dm)
Configuration: Mid wing
Airfoil: Fully symmetrical
Center of Gravity (CG): 3.5" (89mm) aft of leading edge of wing
measured at the fuselage
Control Throws: Low Rate High Rate
Elevator, (up & down): 1-1/4" (32mm) 2" (51mm)
Ailerons, (up & down): 1" (25.4mm) 2" (51mm)
Rudder, (left & right): 1-7/8" (48mm) 2-1/4" (57mm)

jxs 03/03/15

See Tower Catalog page 40.
Know Before You Fly
Easy RC: Airplanes
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