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You've done great with your first trainer and you still have a perfectly good .40 size engine and 4 channel radio. Now is the time to step up and start having some real fun.

SIG's Four-Star 40 has been the "second airplane" of choice for thousands of modelers since its introduction in 1989. With its low semi-symmetrical wing and light wing loading, the Four-Star 40 takes you to the next level, with all the free-style aerobatics and whoop-dee-doos your thumbs can conjure up.

When developing the FOUR-STAR 40, there were two main design goals.
First, of course, was impeccable flight performance in the tradition of all SIG kits.
Second, it had to be ultra-simple to build without looking like a "box with wings". 
The FOUR-STAR 40 shines in both respects! Give it a try - we think you'll give this kit a "four star" rating!


Wingspan 59.75 in 1518 mm
Wing Area 604 sq in 39 dm²
Length 47 in 1194 mm
Flying Weight 4.75 lb 2150 g
Wing Loading 18 oz/sq ft 55 g/dm²
Radio Required 4 Channel, 4 Servos (not included)
Engine Required
(not included)
2-Stroke .40 - .45 cu in (6.5 - 7.5 cc)
4-Stroke .40 - .50 cu in (6.5 - 8.2 cc)


Kit Features

  • Lite-Ply Fuselage Construction
  • Pre-Cut Sheet Balsa Tail Surfaces
  • Durable Aluminum Main Landing Gear
  • Molded Canopy
  • Full Size Plans
  • Fast-Building Wing with Spruce Spars
  • Photo-Illustrated Assembly Manual
  • Laser Cut Parts
  • Sig Easy Hinges
  • Pushrods
  • Hardware Pack
  • Large Decal Sheet

Click here for Star-Four 40 Manual