HomeAbout UsFact SheetsDisplay

GBU-39B Small Diameter Bomb Weapon System

The Bomb Rack Unit 61 with carrier and four ground-training Guided Bomb Unit-39 small-diameter bombs on this munitions trailer undergoes testing at Royal Air Force Lakenheath, England, on Aug. 1. The 494th Fighter Wing will be the first unit to receive and use the bomb when it deploys to Southwest Asia later this year. (U.S. Air Force photo/Master Sgt. Lance Cheung)

The Bomb Rack Unit 61 with carrier and four ground-training Guided Bomb Unit-39 small-diameter bombs on this munitions trailer undergoes testing at Royal Air Force Lakenheath, England, on Aug. 1. The 494th Fighter Wing will be the first unit to receive and use the bomb when it deploys to Southwest Asia later this year. (U.S. Air Force photo/Master Sgt. Lance Cheung)

Airman 1st Class Robert Branham prepares a Bomb Rack Unit-61 for loading onto an F-15E Strike Eagle at Royal Air Force Lakenheath, England, on Aug. 1. The bomb rack and carrier comes loaded with Guided Bomb Unit-39 small-diameter bombs. The Airman is an aircraft weapons specialist with the 48th Aircraft Maintenance Squadron. (U.S. Air Force photo/Master Sgt. Lance Cheung)

Airman 1st Class Robert Branham prepares a Bomb Rack Unit-61 for loading onto an F-15E Strike Eagle at Royal Air Force Lakenheath, England, on Aug. 1. The bomb rack and carrier comes loaded with Guided Bomb Unit-39 small-diameter bombs. The Airman is an aircraft weapons specialist with the 48th Aircraft Maintenance Squadron. (U.S. Air Force photo/Master Sgt. Lance Cheung)

Staff Sgt. Randy Broome signals a jammer operator to move a Bomb Rack Unit 61 forward, while loading it onto an F-15E Strike Eagle at Royal Air Force Lakenheath, England, on Aug. 1. The NCO is an aircraft weapons specialist with the 48th Aircraft Maintenance Squadron. (U.S. Air Force photo/Master Sgt. Lance Cheung)

Staff Sgt. Randy Broome signals a jammer operator to move a Bomb Rack Unit 61 forward, while loading it onto an F-15E Strike Eagle at Royal Air Force Lakenheath, England, on Aug. 1. The NCO is an aircraft weapons specialist with the 48th Aircraft Maintenance Squadron. (U.S. Air Force photo/Master Sgt. Lance Cheung)

Mission
The GBU-39B Small Diameter Bomb, or SDB, is an extended range all-weather, day or night 250-pound class, guided munition. The SDB relies on the Global Positioning System to provide navigation to the target. Additionally, its small size allows increased aircraft loadout to achieve multiple kills per sortie and inherently reduces the probability of collateral damage.

Features
The SDB system employs a smart carriage capable of carrying four 250-lb class guided air-to-surface munitions. It is capable of destroying high-priority fixed and stationary targets from Air Force fighters and bombers in internal bays or on external hard-points. SDB increases aircraft loadout, decreases the logistical footprint, decreases collateral damage, and improves aircraft sortie generation times.

The SDB provides a transformational capability to the warfighter increasing smart weapon carriage by placing up to four smart weapons per 1760 store location.

The weapon system is capable of standoff ranges in excess of 40 nautical miles. The system can be targeted and released against single or multiple targets. SDB target coordinates are loaded into the weapon before release either on the ground or in the air by the aircrew. Once the weapon is released, it relies on GPS/INS to self-navigate to the desired impact point.

Background 
The F-15E Strike Eagle is currently the only aircraft outfitted with the SDB weapon system. Future platforms include the F-16 Fighting Falcon, F-117, B-1 Lancer, B-2 Spirit, F-22 Raptor and F-35 Lightning II.

Air Combat Command defined a mission need for a miniaturized munitions capability in 1997. The Joint Requirements Oversight Council validated this need and development began on the Small Diameter Bomb in 2001. After a 24-month component advanced development phase ended September 2003, Boeing was selected as the prime contractor to develop and produce the Small Diameter Bomb Weapon System. The contract for system development and demonstration was awarded October 2003. The system went into limited initial production in April 2005. In August 2006, the SDB was delivered to warfighters.

General Characteristics
Primary Function: Guided air-to-surface weapon
Contractor: Boeing Co.
Range: More than 40 nautical miles (46 miles)
Guidance System: Global Positioning System/Inertial Navigation System
Unit cost: Approximately $40,000
Initial operational capability: October 2006
Projected Inventory: Total force, 24,000 munitions and 2,000 carriages

Engage

Twitter
F-16 Fighting Falcons assigned to the 18th Aggressor Squadron @EielsonAirForce takeoff in support of exercise Valia… https://t.co/cf0raGgEUD
Twitter
RT @USAF_ACC: "This test, and others like it, can shape the future of the MQ-9, as we continue to increase its relevance in great power com…
Twitter
"We cannot rest on our laurels. It is all about the people, folks, and they will guarantee our readiness, and are f… https://t.co/BsNDUSw0wE
Twitter
RT @USAFCENT: USAFCENT Airmen and coalition partners are executing missions of national, regional and global importance and Exercise Desert…
Twitter
In March 2019, @AFSpecOpsCmd received its first Block 30 AC-130J Ghostrider gunship. Referred to as “the ultimate b… https://t.co/V9FoDThYRQ
Twitter
As the Joint Force transitioned from a Continuous Bomber Presence posture in the Indo-Pacific theater to a Dynamic… https://t.co/u8JlA3GaeF
Twitter
As of August 2020, The 53rd Weather Reconnaissance Squadron, aka Hurricane Hunters, has flown 64 missions into 12 s… https://t.co/CFtHJ8HDXG
Twitter
.@AFGlobalStrike tackled B-1B readiness issues head-on by readying the fleet with a roadmap to recovery over a 2-yr… https://t.co/dEfZemGKbb
Twitter
As we celebrate 73 years of the U.S. Air Force, we remember the heroes we are proud to have served with. Today we… https://t.co/3pdHX3DvIn
Twitter
Flying, fighting and winning since 1947. #USAF73 https://t.co/qM28ykPZwt
Twitter
RT @AF_Academy: Proud to fly the @usairforce flag today and every day! Happy 73rd Birthday! #YourAcademy #FamilyWeek https://t.co/hOIs1ghq7M
Twitter
RT @GenCQBrownJr: Today we honor the #heroes who knew the worst of war and the agony of captivity - those who fought for and lost their fre…
Twitter
RT @ArmyMateriel: Join us in wishing a Happy Birthday to our brothers and sisters in the United States Air Force! #DYK The Air Force was…
Twitter
RT @JBABdc: Happy 73rd birthday, @usairforce! The USAF Band and Honor Guard were thrilled to help kick off the celebration on Fox & Friends…
Twitter
RT @AFSAHQ: Happy Birthday to the world's greatest @UsAirForce ! 73 years of excellence, service and sacrifice. Thank you to all the #Air
Twitter
RT @97AMW: Happy 73rd birthday @usairforce! As we celebrate today, we honor the heroism of our Airmen, past and present, who have been the…
Twitter
RT @53rdWRS: Special birthday shoutout to @usairforce! 73 never looked so good! What better way to celebrate than by flying another missio…
Facebook
The newest Air Force Podcast recently dropped. Listen to a small snippet of CMSAF Kaleth O. Wright talk with Staff Sgt. New about resiliency. Listen to the entire podcast on Youtube: https://go.usa.gov/xpnAD or Subscribe to The Air Force Podcast on iTunes: https://podcasts.apple.com/podcast/the-air-force-podcast/id1264107694?mt=2
Facebook
Our mantra, "Always ready!" It's the spirit we fly by! #B2Tuesday
Facebook
Need some motivation to get your week started off right? Listen as CMSAF Kaleth O. Wright weighs in...
Facebook
The U.S. Air Force Academy gives its cadets some unique opportunities. Ride along one of this opportunities.
Facebook
A United States Air Force KC-135 Stratotanker refuels an F-22 Raptor over northern Iraq, Nov. 6, 2019. U.S. Central Command operations deter adversaries and demonstrate support for allies and partners in the region. (Video by Staff Sgt. Daniel Snider)
Facebook
Although the Silver Star is the third-highest military medal, it's not given often. Today, TSgt Cody Smith was the 49th Special Tactics Airman to receive this medal since Sept. 11th, 2001. Read more of TSgt Smith's amazing story: https://www.airforcespecialtactics.af.mil/News/Article-Display/Article/2024815/special-tactics-airman-battled-through-injuries-awarded-silver-star/fbclid/IwAR2LZWwx1VHdTnQe39rIEBOuJS_0JvMQBBGt7I-E6zsxxn-Lx9387yu43Bc/ Cannon Air Force Base Air Force Special Operations Command United States Special Operations Command (USSOCOM) U.S. Department of Defense (DoD)
Facebook
Tune in as our Air Force musicians along with other military musicians are awarded the National Medal of Arts.
Facebook
Like Us
Twitter
1,280,265
Follow Us