List of Delta 4-M launches


The Delta IV Medium (also referred to as 'single stick'[1][2]) was available in four configurations: Medium, Medium+ (4,2), Medium+ (5,2), and Medium+ (5,4).[3]

The Delta 4 Medium family often flew with Global Positioning System (GPS) satellites. It flew 6 second generation Global Positioning System (GPS) satellites to orbit. After the second generation Global Positioning System (GPS) had all been launched, it launch a third generation Global Positioning System (GPS) only it final flight. The Medium (4,2) version last flew on 22 August 2019, marking the retirement of the Delta IV Medium variants.[3][4]

Launch StatisticsEdit

Delta 4-M
 
Delta 4 Medium launch carrying DSCS III-B6.
FunctionOrbital launch vehicle
ManufacturerUnited Launch Alliance
Country of originUnited States
Cost per launchUS$164+ million[5]
Size
Height63–72 m (207–236 ft)
Diameter5 m (16 ft)
Mass550,000 lb (250,000 kg)
Stages2
Capacity
Payload to LEO
Mass25,287 lb (11,470 kg)
Payload to GTO
Mass9,799 lb (4,445 kg)
Associated rockets
FamilyDelta Delta 4 Medium
Comparable
Launch history
StatusRetired
Launch sitesSLC-37B, Cape Canaveral
SLC-6, Vandenberg
Total launches3
Success(es)3
First flight20 November 2002 (Eutelsat W5)
Last flightNovember 4, 2006 (DMSP 17)
Notable payloads
First stage – CBC
Gross mass226,400 kg (499,100 lb)
Engines1 RS-68A
Thrust3,140 kN (705,000 lbf) (sea level)
Specific impulseSea level: 360 s (3.5 km/s)
Vacuum: 412 s (4.04 km/s)
Burn time245 seconds (328 seconds in Heavy configuration)
FuelLH2 / LOX
Second stage – Delta Cryogenic Second Stage (DCSS)
Gross mass4-m: 24,170 kg (53,290 lb)
5-m: 30,700 kg (67,700 lb)
Engines1 RL10-B-2
Thrust110 kN (25,000 lbf)
Specific impulse462 s (4.53 km/s)
Burn time850-1,125 seconds
FuelLH2 / LOX

Launch OutcomesEdit

  •   Success
  •   Failure

Launch sitesEdit

OrbitsEdit

CustomersEdit

Launch HistoryEdit

Flight Date / time (UTC) Rocket Configuration Launch site Payload Payload mass Orbit Customer Launch

outcome

1 March 11, 2003

00:59

Delta 4-M CCAFS SLC-37B USA-167 (DSCS-3 A3) Classified GTO US Air Force Success[6]
Military communications satellite, First Delta 4 Medium launch, First USAF EELV mission
2 August 29, 2003

23:13

Delta 4-M CCAFS SLC-37B USA-170 (DSCS-3 B6) Classified GTO US Air Force Success[6]
Military communications satellite
3 November 4, 2006

13:53

Delta 4-M VAFB SLC-6 DMSP F17 Classified SSO DoD Success[7]
First Delta 4 launch into a LEO/SSO, Military weather satellite. Final Delta 4-M launch.

See alsoEdit

ReferencesEdit

  1. ^ Clark, Stephen. "Final 'single stick' Delta 4-Medium rocket arrives at Florida launch pad – Spaceflight Now". Retrieved 2020-11-01.
  2. ^ Ray, Justin. "Air Force assigns new Delta 4 rocket launch – Spaceflight Now". Retrieved 2020-11-01.
  3. ^ a b Gebhardt, Chris (2019-08-22). "Delta IV Medium's well-earned retirement with GPS finale". NASASpaceFlight.com. Retrieved 2020-08-15.
  4. ^ Berger, Eric (2019-08-22). "The last single-stick Delta rocket launched Thursday, and it put on a show". Ars Technica. Retrieved 2020-08-06.
  5. ^ Office, U. S. Government Accountability. "Surplus Missile Motors: Sale Price Drives Potential Effects on DOD and Commercial Launch Providers". www.gao.gov.
  6. ^ a b "Delta 4 rocket successfully begins military service". Spaceflight Now. March 10, 2003.
  7. ^ "Military weather satellite rockets into polar orbit". Spaceflight Now. November 4, 2006.