The Vellox airliner was developed from the Vickers Vellore, a cargo and mail aircraft which in its original form was single-engined. Comfortable accomodation for ten passengers was provided but Imperial Airways only used the sole Vellox as a nocturnal mailplane while testing Lorenz blind landing equipment. It crashed after a few months in service in August 1936. Four-blade propellers are fitted here.
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