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Vanilla Aircraft, whose small, diesel-powered VA001 unmanned aerial vehicle set a flight duration record late last year, is developing two larger aircraft that could carry heavier payloads to meet anticipated customer needs.One new variant will have a larger engine and a slightly longer wing, allowing it to carry a 50-pound payload, up from the VA001’s 30-pound payload. Vanilla calls it “the B version” of the VA001 because, like the original aircraft, it will have a “bulbous bottom and long skinny…
