<prompt> Pedzisa mutsara unotevera: Kugadziriswa kwakaitwa kumuviri uye shanduko yekuchinja ye1949 uye 1950 GP2 uye GP3 motokari, GP3 yakawanawo maviri-nhanho supercharger. Zvakare dzakavakwa kuti dzirairwe, uye dzakapihwa kuna Geoffrey Crossley naJoe Kelly zvichiteerana. Crossley akatora GP2 ku1949 Belgian Grand Prix, asi aigona chete kubata nzvimbo yechinomwe. Muna 1950 akaisa zvinyorwa zvinoverengeka zvekumhanya pamusoro pemakiromita makumi mashanu, makiromita makumi mashanu uye makiromita zana padunhu reMontlhéry. Kelly akaisa pfungwa dzake zvikurukuru pamijaho yokuIreland, uye mugumo wake wakanakisisa wakanga uri wechitatu muUlster Trophy ya1952. Vatyairi vose vari vaviri vakatora chassis yavo kunzvimbo  <response>: 1950 British Grand Prix, mujaho wokutanga weFormula One World Championship. Zvisinei, apo Kelly akapedza, akanga asina kuvanzika; Crossley akarega basa nechikanganiso chekutapurirana. 