Estes Rocket Motors - A3-4T (Pack4)

The Estes A3-4T is a single-stage 13 mm mini rocket motor designed for flights in lightweight model rockets. Supplied as a convenient pack of four, this D-ES1507 set also includes starters and starter plugs to support reliable ignition for small airframes.

What’s Included

• 4 × A3-4T engines
• 4 × starters
• 4 × starter plugs

Key Specifications

• Length: 1.8 in. (4.6 cm)
• Diameter: 13 mm
• Estimated Weight: .28 oz. (7.9 g)
• Total Impulse: 2.50 N-sec
• Time Delay: 4 Seconds
• Estimated Max Lift Weight: 2.0 oz (57 g)
• Max Thrust: 6.80 Newtons (1.5 lbs)
• Thrust Duration: 0.60 Seconds
• Initial Weight: 0.28 oz (8.0 g)
• Propellant Weight: 0.12 oz (3.3 g)
• Quantity Per Pack: 4