ULA Delta IV Heavy NROL-71 from CA

Images and Illustrations credit & copyright: United Launch Alliance (ULA) & NASA.

Launch Alert!!! Sunday, December 30, 2018 at 17:44 PST/20:44 EST (00:44 UTC on the 20th) the United Launch Alliance (ULA) will be launching the beautiful Delta IV Heavy from Vandenberg Air Force Base’s Space Launch Complex 6 (SLC-6 or “Slick” 6) to deliver a classified spy satellite for the United States National Reconnaissance Office (NRO). Note: This will be the 11th launch of the Delta IV Heavy.

The United Launch Alliance Delta IV Heavy:

Height: 70.7 m (232 ft.)

Core Diameter: 5.1 m (16.7 ft.)

Width at Base: 15.3 m (50.1 ft.)

Stages: 2 or 3

Boosters: 2

Total Engines: 4 (3 in the first stage and 1 in the second stage)

Total Liftoff Thrust (sea level): 9,420 kN (2,120,000 lbf)

Gross Mass: 733,000 kg (1,616,000 lb.)

Payload to Low Earth Orbit (LEO): 28,370 kg (62,540 lb.)

Payload to Geosynchronous Transfer Orbit (GTO): 14,210 kg (31,330 lb.)

Payload to Geosynchronous Orbit (GEO): 6,580 kg (14,500 lb.)

Cost: $350 million

*

Main Composite Payload Fairing (PLF): The Delta IV Heavy main payload fairing is a 5.1 m (16.7 ft.) diameter composite bisector (two-shell) protective enclosure that protects the spacecraft from the atmospheric turbulence of ascent. Once the vehicle achieves a safe altitude, the fairings are jettisoned and the spacecraft is then exposed to space.

Delta Cryogenic Second Stage (DCSS):

Height: 13.7 m. (45 ft.)

Diameter: 5.1 m (17 ft.)

Engine(s): Single Aerojet Rocketdyne RL10-B-2

Engine Chambers: 1

Engine Type (cycle): Expander Cycle

Propellant Feed Method: Turbopump

Chamber Pressure:

Fuel Type: Liquid

Fuel: Fuel: Liquid hydrogen (LH2). LH2 provides a higher specific impulse than rocket propellant 1 (RP-1) or as it’s sometimes called highly refined kerosene, but it’s more expensive, not stable at room temperature (must be kept cold), more explosive, less dense and less powerful by volume.

Oxidizer: Liquid Oxygen (LOX). LOX is often coupled with rocket propellant-1 (RP-1), liquid hydrogen (LH2) and methane (CH4) as it creates a high specific impulse.

Thrust (vacuum): 110.1 kN (24,800 lbf.)

Single RL-10 Thrust to Weight Ratio: N/A

Specific Impulse (vacuum): 462 s

Burn Time: 1125 s

Restart Ability: Yes

Reusable?: No

Common Booster Core (CBC) Boosters:

How Many: 2

Height: 40.8 m. (134 ft.)

Diameter: 5.1 m (17 ft.)

Engine(s): 1 Aerojet Rocketdyne RS-68A

Engine Chambers: 1

Engine Type (cycle): Gas generator

Propellant Feed Method: Turbopump

Chamber Pressure: 10.26 MPa or 102.6 bar or 1,488 psi

Fuel Type: Liquid

Fuel: Liquid hydrogen (LH2). LH2 provides a higher specific impulse than rocket propellant 1 (RP-1) or as it’s sometimes called highly refined kerosene, but it’s more expensive, not stable at room temperature (must be kept cold), more explosive, less dense and less powerful by volume.

Oxidizer: Liquid Oxygen (LOX). LOX is often coupled with rocket propellant-1 (RP-1), liquid hydrogen (LH2) and methane (CH4) as it creates a high specific impulse.

Single RS-68A Thrust (sea level): 3,137 kN (705,000 lbf.)

Single RS-68A Thrust to Weight Ratio: 47.4

Specific Impulse (sea level/vacuum): 360 s/412 s

Burn Time: 242 s

Restart Ability: No

Reusable?: No

*

Common Booster Core (CBC):

Height: 40.8 m. (134 ft.)

Diameter: 5.1 m (17 ft.)

Engine(s): 1 Aerojet Rocketdyne RS-68A

Engine Chambers: 1

Engine Type (cycle): Gas generator

Propellant Feed Method: Turbopump

Chamber Pressure: 10.26 MPa or 102.6 bar or 1,488 psi

Fuel Type: Liquid

Fuel: Liquid hydrogen (LH2). LH2 provides a higher specific impulse than rocket propellant 1 (RP-1) or as it’s sometimes called highly refined kerosene, but it’s more expensive, not stable at room temperature (must be kept cold), more explosive, less dense and less powerful by volume.

Oxidizer: Liquid Oxygen (LOX). LOX is often coupled with rocket propellant-1 (RP-1), liquid hydrogen (LH2) and methane (CH4) as it creates a high specific impulse.

Single RS-68A Thrust (sea level): 3,137 kN (705,000 lbf.)

Total Liftoff Thrust (all 3 RS-68A CBC’s)(sea level): 9,420 kN (2,120,000 lbf)

Single RS-68A Thrust to Weight Ratio: 47.4

Specific Impulse (sea level/vacuum): 360 s/412 s

Burn Time: 328 s

Restart Ability: No

Reusable?: No

*

Stream Live:

ULA Webcast: http://www.ulalaunch.com/webcast.aspx

ULA YouTube: https://www.youtube.com/user/UnitedLaunchAlliance

ULA Facebook: http://www.facebook.com/ulalaunch

NROL-71 Mission Information:

ULA Mission Page: https://www.ulalaunch.com/missions/delta-iv-nrol-71

National Reconnaissance Office (NRO)

Main site: http://www.nro.gov/

Facebook: https://www.facebook.com/NationalReconnaissanceOffice/

Twitter: https://twitter.com/NatReconOfc

YouTube: https://www.youtube.com/channel/UCHTyYHmPK8sM0ep89cMtSiw

United Launch Alliance (ULA):

ULA homepage: http://www.ulalaunch.com/

Discover ULA: http://www.discoverula.com/

Twitter: https://twitter.com/ulalaunch

Twitter for ULA CEO Tory Bruno: https://twitter.com/torybruno

Instagram: http://instagram.com/ulalaunch

Facebook: http://www.facebook.com/ulalaunch

YouTube: http://www.youtube.com/user/UnitedLaunchAlliance

Flickr: https://www.flickr.com/photos/ulalaunch/

Rocket Builder: https://www.rocketbuilder.com/

Aerojet-Rocketdyne:

Main Site: http://www.rocket.com/

Twitter: https://twitter.com/AerojetRdyne

Facebook: http://facebook.com/AerojetRdyne

Delta IV Rocket Family:

Delta IV Family Page: https://www.ulalaunch.com/rockets/delta-iv

Delta IV Users Guide: https://www.ulalaunch.com/docs/default-source/rockets/delta-iv-user’s-guide.pdf

Delta IV, 5 Meter Cutaway: https://www.ulalaunch.com/docs/default-source/rockets/delta-iv-5-meter-cutaway.pdf

Delta IV Heavy Cutaway: https://www.ulalaunch.com/docs/default-source/rockets/delta-iv-heavy-cutaway.pdf

Delta IV Heavy Wiki: https://en.wikipedia.org/wiki/Delta_IV_Heavy

All Delta launches: https://en.wikipedia.org/wiki/List_of_Thor_and_Delta_launches

Patrick AFB: 45th Space Wing, Cape Canaveral, FL:

Main Site: http://www.patrick.af.mil/

Twitter: https://twitter.com/45thSpaceWing

Facebook http://www.facebook.com/45thSpaceWing

Vandenberg AFB, 30th Space Wing, CA:

Vandenberg AFB launch complex locations & viewing locations: https://www.google.com/maps/d/viewer?mid=1eJ71ff_mISR9o8ndMX7nwrvQlTw&hl=en_US&ll=34.6567746365756%2C-120.51221950488281&z=12

Vandenberg AFB : http://www.vandenberg.af.mil/

Twitter: https://twitter.com/30thSpaceWing

Facebook: http://www.facebook.com/30thSpaceWing

YouTube: http://www.youtube.com/user/30SWVandenberg

Air Force Space Command (AFSC):

Main Site: http://www.afspc.af.mil/

Twitter: https://twitter.com/AFSpace

Facebook: http://www.facebook.com/AirForceSpaceCommand

YouTube: https://www.youtube.com/channel/UC339eVx3dEGpH6tFRZt-oDg

Flickr: http://www.flickr.com/photos/airforcespacecommand/

Los Angeles Air Force Base, Space and Missile Systems Center:

Main Site: http://www.losangeles.af.mil/

Facebook: http://www.facebook.com/SpaceandMissileSystemsCenter

Twitter: https://twitter.com/AF_SMC

Instagram: https://instagram.com/af_smc/

Flickr: https://www.flickr.com/photos/129133022@N07/

Peterson AFB (21st Space Wing), Colorado Springs, CO:

Main Site: http://www.peterson.af.mil/

Facebook: http://www.facebook.com/21stSpaceWing

Twitter: https://twitter.com/PeteAFB

Instagram: http://instagram.com/officialusairforce

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