stuartblack, your statement about converting from "medium weight" Catalina to heavier Oxford aircraft (if I am reading this right) just does not make sense to me. The Catalina was a far heavier aircraft (max take off weight on water could be as high as 35,000 pounds) than the low powered and very small twin-engined Airspeed Oxford (max take off weight about 7,300 pounds, this was a dedicated training aircraft for multi-engine pilots, including use for Beam (or "Blind") Approach Training. Thus Catalina could be up to 7 times heavier than Oxford.
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