Congratulations on your prompt and correct reply. I am getting on in years, and can't recall a similar or identical quiz of mine here. Can you supply the quiz number?
Meanwhile, the WWII German Heinkel He 177 GREIF-(Griffon) strategic bomber was designed to carry 4,400 lbs of bombs over a 1,000 mile radius. It used four 1.000 Hp Daimler-Benz DB 601s initially or four 2,700 Hp DB 606As coupled in pairs, in one nacelle per wing each driving a single shaft four-bladed prop. It did not have an easy or uncomplicated birthing. One successful technique was to fly high at maximum ceiling, dive fast at the target and pull out at a low altitude that was hard to defend against -dropping its bomb load with some successes and escaping at maximum speed. This was successful on the Russia front in late Spring of 1944. Germany's lack of fuel helped end the conflict-80 aircraft consumed 480 tons of fuel which was equivalent to a single day's output of their entire oil refining industry.
Now, getting to the Beech Model 34 TWIN QUAD- Beech looked to the postwar feeder airline market to design a similar propulsion concept with four 8 cylinder Lycoming GSO-580 engines of 400 Hp each at 3,300 rpm. The 20 passenger Twin Quad could carry 1,000 lbs of cargo with range of 1,400 statute miles with 45 minute reserve at 180 mph. Design was for 300 mph, never attained-200 mph more realistic. Wingspan of the high wing was 70 feet. Tri-gear was retractable. Flight tests of more than 200 hours were from late 1947 to January 1949. NX90521 made a forced landing in January 1949 shortly after takeoff and was "damaged beyond economical repair." The prominent Vee tail was not related to the first Beech Bonanzas-Beech had an earlier Vee tail flight-tested on a sleek AT-10 twin in 1944-45. The 35 Bonanza's first flight was on 22 December, 1945.