The B6-4 is a medium impulse engine that delivers high altitude flights. It works great for launching larger, heavier rockets, too. Estes engine bulk packs are convenient and include everything your students need to prepare their rockets for launching.

PLEASE NOTE: This item will ship by US Postal Service only. You MUST HAVE a physical mailbox or post office box for delivery.

Mean, lean and wicked! D and E engine powered at its finest! Breaks down for easy transport.

Fully Assembled

A sophisticated and lightweight electronic payload for accurately measuring your model rocket altitudes.