Flightpath UK - 1/48 Raf Type 'B' Bomb Trolley Set Two Trolleys, with 250Ib and 500Ib Gp Bombs. The Type 'B' was introduced in 1937 to transport bombs and stores up to 1,000lb in weight. They saw service throughout the war years, although they had been largely replaced by the Type 'C' trolley at the end of hostilities. The height of these units could be altered by means of a hand-pumped hydraulic ram unit.Two trolleys are supplied, one with 4 x 250Ib Gp Bombs and the second with 2 x 500Ib Gp Bombs. These trolleys are a must for your medium bomber displays but were also seen with the heavy bombers if they were carrying a mix of bomb weights.