How many Delta IV rockets are left?

four remaining
ULA, a 50-50 joint venture between Lockheed Martin and Boeing, has only four remaining Delta IV Heavy rockets in its fleet. All of those are assigned to launch missions for the NRO, with two launches from California (including today’s mission) and the remaining two to launch from Florida.

How much does a Delta IV rocket cost?

Delta IV Heavy

What kind of rocket is the Delta IV?

The Delta IV launch system is available in three configurations: the Delta IV Medium+, with two or four solid rocket motors (SRMs), and the Delta IV Heavy. Each configuration is comprised of a common booster core (CBC), a cryogenic upper stage and a 5-meter-diameter payload fairing (PLF).

What kind of Booster does Delta IV Heavy use?

The Delta IV Heavy employs two additional CBCs as liquid rocket boosters to augment the first-stage CBC. Optimal orbit for each customer, delivering industry best spacecraft orbital insertion accuracy.

Why did the Delta IV enter the space market?

The Delta IV entered the space launch market when global capacity was already much higher than demand. Furthermore, as an unproven design it has had difficulty finding a market in commercial launches, and the cost to launch a Delta IV is higher than that for competing vehicles.

What are the SRMS on a Delta IV?

Conceived using a simplified design approach, it has fewer parts, is lower risk and has inherently reliable operation. For additional thrust at liftoff, the Delta IV Medium+ uses either two or four Orbital ATK solid rocket motors (SRMs). The SRMs are strapped to the common booster core and jettisoned in-flight for maximum performance.