• Cluster Rocket. Uses A, B or C Estes Motors
• Ejection Baffle (no wadding required)
• Comes with pre-assembled plastic parachute.
• The balsa fins are pre-cut. Comes with water-slide and self-adhesive decals
• Over 27" Tall
• Basic Assembly Skills Required

Recommended Engines (apogee ft):

3 x A8-3 (275) , 3 x B4-4 (600) , 3 x B6-4 (610) , 3 x C6-5 (1200)

Specifications

• Length: 27.5" (70 cm)
• Diameter: 1.64" (42 mm)
• Weight: 5.6 oz. (162 g)

Description

This sport-scale model of the KSR-420S flies on a cluster of three 18mm model rocket motors. The KSR-420S is easy to build and comes with ejection baffle, so no wadding is required. This makes it a great choice for rocketeers new to clustering.

The real Korean sounding rocket was used to gather data on ozone concentration over the Korean peninsula. The KSR-420S also carried a highly-specialized device to measure micro gravity. In somewhat less peaceful times, the KSR-420S could be modified to carry a 200 kg destructive payload over a considerable distance.

Requires

• Assembly 
• Motor, Igniter
• Launch System 
• Maxi Launch Rod
• Carpenter's glue
• Fine Sand Paper
• Utility or Hobby Knife
• Masking Tape (optional)
• Primer (optional) & Paint

Construction Video*

* This video does not substitute the instructions provided with rocket. The videos below provided by an independent builder and some steps are not exactly as per instructions.

• KSR-420S build Part 1
• KSR-420S build Part 2