Starting the US Gigantic B-1 Lancer Before Takeoff at Full Afterburner
The B-1 Lancer, known by its callsign “Bone” (from “B-One”), is one of the most formidable aircraft in the U.S. Air Force’s strategic bomber fleet. Designed during the Cold War to penetrate Soviet airspace at low altitude and high speeds, this variable-sweep wing aircraft is capable of both high-speed dashes and extended long-range missions. Watching it start up and take off with full afterburners is a visceral display of raw power, precision, and engineering excellence.
Pre-Flight Start-Up Sequence
The B-1B Lancer is powered by four General Electric F101-GE-102 afterburning turbofan engines, each producing 30,000+ pounds of thrust with afterburner engaged. The pre-flight process begins with standard ground crew checks, power-up of avionics, flight control systems, and environmental systems. The cockpit crew goes through a meticulous pre-flight checklist while the aircraft is still tethered and connected to ground power units.
Once clearances are given, the pilots initiate the engine start sequence. Each of the four engines is started sequentially using the aircraft’s onboard auxiliary power unit (APU). After all engines are spooled up and stabilized, the aircraft is disconnected from ground support and ready to taxi.
Taxi and Line-Up
The taxi to the runway is a calculated, smooth operation despite the aircraft’s massive size. With a wingspan that adjusts dynamically from 79 to 137 feet depending on sweep angle, and a length of 146 feet, ground clearance and coordination with control towers is critical.
Once aligned on the runway, the aircraft pauses. At this moment, the crew performs final systems checks. Flaps and slats are set appropriately, wing sweep may be adjusted depending on mission parameters, and the afterburners are readied for ignition.
Full Afterburner Takeoff
When cleared for takeoff, the B-1’s engines roar to life at full military power. A moment later, the afterburners ignite—injecting fuel into the exhaust stream for a massive boost in thrust. The result is dramatic: the aircraft leaps forward with a deep, rumbling roar that shakes the ground. Twin orange-and-blue afterburner flames trail from each engine, leaving behind a blur of heat distortion.
Despite its 477,000-pound maximum takeoff weight, the B-1B accelerates rapidly, often reaching takeoff speed within just a few thousand feet. Its variable-geometry wings may be swept rearward during takeoff for enhanced aerodynamic performance.
As it lifts off, the B-1 climbs steeply and often performs a quick roll or banking maneuver to leave the area swiftly. In some airshows or high-profile missions, the jet may even perform a spiraling climb, using its full power and agility to awe spectators and demonstrate operational readiness.
A Symbol of Strategic Power
The sight and sound of a B-1B Lancer at full afterburner is unforgettable. It’s not just an impressive aviation display—it’s a reminder of the aircraft’s strategic purpose. With its blend of speed, payload, and adaptability, the B-1 remains a key component of U.S. military airpower, projecting strength wherever it flies.
