Editing BMP-3 (section)

=== Mobility ===
The vehicle has an unconventional layout. The engine is in the back of the vehicle to the right (unlike most other IFVs, which have the engine located forward in the hull). As a result, the driver is seated forward in the hull (in the center) together with two infantrymen (one on each side of the driver). The vehicle has a double bottom, and the engine is located under the floor of the vehicle (troops enter/leave the vehicle over the engine).<ref>{{cite web |url=http://pravda-team.ru/eng/image/photo/2/2/7/26227.jpeg |title=Archived copy |access-date=2011-09-07 |archive-url=https://web.archive.org/web/20120929210001/http://pravda-team.ru/eng/image/photo/2/2/7/26227.jpeg |archive-date=2012-09-29 |url-status=live }}</ref> The remaining five infantrymen are seated aft of the two-man turret.<ref name="Zaloga, Steven J. 1999" />

Early models were powered by a 450&nbsp;hp engine UTD-29, but most BMP-3s are now equipped with the 500&nbsp;hp UTD-29M version. The engine was developed at the Transmash Diesel Engine Plant in Barnaul.<ref name="Zaloga, Steven J. 1999" /> The BMP-3 has a range of 600&nbsp;km, an altitude of operation of up to 3,000&nbsp;m and it is transportable by train, truck, sea, and air. The BMP-3 engine is a diesel four-stroke, liquid-cooled design. The transmission is a four-speed hydromechanical power unit, with power takeoff to its water jets. The suspension is independent, with a torsion bar and six hydraulic shock absorbers. Steering is by gear differential with hydrostatic drive. The track adjusting mechanism is remotely controlled from the driver's station, with tension force indication. The water-jet propulsion unit is single-stage, axial, [[auger conveyor|auger-type]].<ref>{{cite web|url=http://www.kurganmash.ru/en/machines/bmp3/serial_bmp3/ |title=BMP-3 Infantry fighting vehicle |access-date=1 February 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150518090646/http://www.kurganmash.ru/en/machines/bmp3/serial_bmp3/ |archive-date=18 May 2015 }}</ref>