How many Delta IV launches have there been?

List of Delta IV launches

Size
Status	Delta IV Heavy is active; Delta IV Medium, M+(4,2), M+(5,2), and M+(5,4) retired.
Launch sites	SLC-37B, Cape Canaveral SLC-6, Vandenberg AFB
Total launches	41 Medium: 3 M+ (4,2): 15 M+ (5,2): 3 M+ (5,4): 8 Heavy: 13
Success(es)	40 Medium: 3 M+ (4,2): 15 M+ (5,2): 3 M+ (5,4): 8 Heavy: 12

Who builds the Delta rocket?

United Launch Alliance
Delta IV

Manufacturer	United Launch Alliance
Country of origin	United States
Cost per launch	US$164+ million
Size
Height	63–72 m (207–236 ft)

What did the Delta IV do?

NASA calls on the Delta IV to launch heavy weather satellites into an orbit 22,300 miles above Earth. The rocket uses an engine called the RS-68 that is derived from the Space Shuttle Main Engine. It produces 758,000 pounds of thrust. Solid-fueled boosters can also be attached to the side for extra power.

How many Delta rockets are left?

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 many engines does the Delta 4 have?

Main Engine: The Delta IV Medium+ launch vehicles feature an Aerojet Rocketdyne RS-68A booster engine, while the Delta IV Heavy uses three Aerojet Rocketdyne RS-68A engines, one on each of its three common booster cores.

What fuel does Delta IV Heavy use?

LH2 / LOX
Delta IV Heavy

Size
Maximum thrust	110 kN (25,000 lbf)
Specific impulse	462 s (4.53 km/s)
Burn time	1125 seconds
Propellant	LH2 / LOX

How fast is Delta IV Heavy?

Delta IV Heavy

Size
Burn time	328 seconds
Propellant	LH2 / LOX
Second stage (DCSS)
Height	13.7 m (45 ft)

What is the Delta IV Heavy made of?

The Delta IV Heavy is currently the most powerful rocket in ULA’s fleet. Fueled by 465,000 gallons (1.76 million liters) of superchilled liquid hydrogen and liquid oxygen, the mega launcher consists of three common core boosters that generate more than 2 million pounds of thrust.

Who builds the Delta 4 Heavy?

United Launch Alliance (ULA)
It is manufactured by United Launch Alliance (ULA) and was first launched in 2004. ULA will retire the Delta IV Heavy in 2024. As of March 2022, three flights remain.

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.