Estes 1/2A3-2T Rocket Motors Pack4 Bulk (72) – D-ES1503

The Estes 1/2A3-2T is a single-stage, 13 mm mini rocket motor designed for lightweight model rockets. This listing is for the Estes Rocket Motors – 1/2A3-2T (Pack4) presented as a Bulk Pack of 72 under part number D-ES1503, offering a convenient option for club launches, schools and frequent flyers.

Delivering a 2-second delay and a total impulse of 1.25 N-sec, the 1/2A3-2T provides reliable boosts for small rockets within its suggested lift capacity. It’s a proven choice for short, punchy flights where predictable performance matters.

Key Specifications

• Length: 1.75 in (4.4 cm)
• Diameter: 13 mm
• Estimated Weight: 0.23 oz (6.5 g)
• Total Impulse: 1.25 N-sec
• Time Delay: 2 seconds
• Estimated Max Lift Weight: 2.0 oz (57 g)
• Max Thrust: 8.30 N (1.9 lbs)
• Thrust Duration: 0.30 seconds
• Initial Weight: 0.23 oz (6.4 g)
• Propellant Weight: 0.07 oz (1.9 g)
• Quantity Per Pack: 4

What’s Included Per Pack

• 4 engines
• 4 starters
• 4 starter plugs