the streaker is propelled using high performance mass fraction hybrid common core boosters, which will use htpb and nitrous oxide as fuel. the two motors involved in this system are the hybrid upper stage motor and the spacedev streaker small common booster motor, which will produce 20,000 and 120,000 pounds of thrust respectively. both motors are used in the spacedev dream chaser. other important components include a common core booster and a hybrid transfer stage.