Estes Rocket Motors - 1/2A3-4T (Pack4)

The Estes 1/2A3-4T is a 13 mm mini model rocket engine designed for single-stage flights in lightweight rockets. Supplied as a convenient pack of four under part number D-ES1504, each motor features a 4-second delay and compact dimensions suited to smaller airframes.

Key Specifications

• Engine Type: 1/2A3-4T mini, single stage
• Length: 1.8 in (4.6 cm)
• Diameter: 13 mm
• Estimated Weight: 0.23 oz (6.5 g)
• Initial Weight: 0.23 oz (6.6 g)
• Propellant Weight: 0.07 oz (1.9 g)
• Total Impulse: 1.25 N-sec
• Time Delay: 4 seconds
• Max Thrust: 8.30 N (1.9 lb)
• Thrust Duration: 0.30 seconds
• Estimated Max Lift Weight: 1.0 oz (28 g)
• Quantity Per Pack: 4

What's Included

• 4 x 1/2A3-4T rocket engines
• 4 x starters
• 4 x starter plugs