PLEASE NOTE: These are 18mm diameter engines. Please refer to the instructions that came with your rocket (or the rocket's product description) to determine engine compatibility. This bundle includes a total of 9 engines: Three A8-3 engines Three B6-4 engines Three C6-5 engines Includes all necessary starters and reusable starter plugs The A8-3 is ideal for smaller fields, or to be able to see the entire flight profile of your rocket. The B6-4 will almost double your altitude. The C6-5 provides almost double the altitude that the B6-4's can provide! This item will ship by US Postal Service only. Technical Specifications A8-3 Total Impulse: 2.50 N-sec Time Delay: 3 Seconds Max Lift Weight: 3.0 oz (85 g) Max Thrust: 10.70 Newtons (2.4 lbs) Thrust Duration: 0.50 Seconds Length: 2.8 in. (7 cm) Diameter: 18 mm Weight: .55 oz. (15.6 g) Propellant Weight: 0.14 oz (4.1 g) B6-4 Total Impulse: 5.00 N-sec Time Delay: 4 Seconds Max Lift Weight: 4.0 oz (113 g) Max Thrust: 12.10 Newtons (2.7 lbs) Thrust Duration: 0.80 Seconds Length: 2.8 in. (7 cm) Diameter: 18 mm Weight: .63 oz. (17.9 g) Propellant Weight: 0.23 oz (6.5 g) C6-5 Total Impulse: 10.00 N-sec Time Delay: 5 Seconds Max Lift Weight: 4.0 oz (113 g) Max Thrust: 15.30 Newtons (3.4 lbs) Thrust Duration: 1.60 Seconds Length: 2.8 in. (7 cm) Diameter: 18 mm Weight: .85 oz. (24.1 g) Propellant Weight: 0.43 oz (12.2 g) Please verify that these engines are compatible with your model rocket before purchasing. This product is warranted by Estes against defects in materials or workmanship from one year of the original purchase. Please retain the warranty information included in the package so that you may reference it in the event that you receive a defective or malfunctioning product as the engines are not returnable by mail.
