20,000 lb (9,000 kg) standard loadout, could be modified to externally carry two 22,000 lb (10,000 kg) T-14 "Earthquake" bombs Oil flow to the valves was also increased, asbestos baffles installed around rubber push rod fittings to prevent oil loss, thorough pre-flight inspections made to detect unseated valves, and frequent replacement of the uppermost five cylinders (every 25 hours of engine time) and the entire engines (every 75 hours). Pilots, including the present-day pilots of the Commemorative Air Force’s Fifi, the last-remaining flying B-29, describe flight after takeoff as being an urgent struggle for airspeed (generally, flight after takeoff should consist of striving for altitude). Radial engines need that airflow to keep them cool, and failure to get up to speed as soon as possible could result in an engine failure and risk of fire. One helpful technique was/is doing a rolling start-off, rather than a braked start, and checking the magnetos while already in motion. 3,250 33,600 357