The following notes are from the logbook of the BLEU technologist carrying out the development:[28] 10 March 1958 (the 38th flight of that programme): "Very little drift, about 0.3g – heights 150-55-15-0". That was with manual throttle, but auto throttle was used on 12 March, in a strong crosswind. 17 March saw "strong tailwind, 20 – 25 kt., pronounced float" and on 20 June, after adjustments during a further 20 flights: "not bad – about 0.7 g nicely on main wheels – kicking off drift OK".