Happy New Year - Welcome 2026
ENGINES FOR MODEL ROCKETS
4 – A3-4T Engines
4 – Starters
4 – Starter Plugs
PLEASE NOTE: You must have a physical address for delivery.
Availability: Out of stock
Couldn't load pickup availability
We ship all US domestic orders typically within 1 -2 business days. 30-day money back guarantee as long as return is in same condition as was shipped
ENGINES FOR MODEL ROCKETS
4 – A3-4T Engines
4 – Starters
4 – Starter Plugs
PLEASE NOTE: You must have a physical address for delivery.
The Estes A3-4T engine is single stage engine designed for model rocket flight. This engine is a mini engine designed for flights in lightweight rockets. Each package includes 4 engines, 4 starters and 4 starter plugs.
ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions or Click Here for State Specific Restrictions.
Technical Specifications:
Total Impulse:
2.50 N-sec
Length:
1.8 in. (4.6 cm)
Time Delay:
4 Seconds
Diameter:
13 mm
Max Lift Weight:
2.0 oz. (57 g)
Weight:
.28 oz. (7.9 g)
Max Thrust:
6.80 Newtons (1.5 lbs)
Propellant Weight:
0.12 oz. (3.3 g)
Thrust Duration:
0.60 Seconds
Compatible Rockets:
