Starkweather-Moore Expedition: Beyond the Mountains of Madness
Boeing 247 Specs
This very advanced all-metal monoplane, designed as a 12 passenger airliner, has all the most modern features: air conditioning and cabin heating, sound proofing, radio, a de-icing system for the wings and tail, variable pitch three-bladed propellers, engine superchargers, flaps, and retractable landing gear.
The first flight by a Model 247 was on February 8, 1933. The hinged nose allows access to a luggage compartment.
Some modifications have been made to the aircraft of the Starkweather-Moore Expedition, as follows: retractable ski landing gear, oxygen breathing apparatus, extra radio equipment, gyrocompass, radio direction finder, artificial horizon, an eight-gallon fresh water tank, extra fuel tanks, lightweight folding seats, wider doors (to fit cargo and fuel drums), motion picture camera rack and optically flat window, and electric engine heaters.
The engines are two Pratt & Whitney “Wasp” S1H1-G nine cylinder air-cooled radials, 550 HP each. Features include inertia (hand cranked) and electric (battery) starters, engine fire extinguishers, and a 12-gallon oil tank fitted in each engine nacelle.
Each engine uses 25 gallons of gasoline per hour at ‘cruise’ setting, 35 gallons per hour at full power.
Total fuel capacity is 770 gallons:
220 gallons in the wing tanks, and 550 gallons in auxiliary tanks built into the fuselage. Engine overhauls are needed after 300 hours of operation. The Model 247 can climb with one engine shut down, up to 6,000 feet altitude, depending on load.
|empty weight||11,000 lbs.|| no fuel, oil, cargo or
passengers; includes seats, radios,
|maximum gross weight||17,000 lbs.|
|emergency overload||19,500 lbs.||cannot take off at high
altitudes at this weight
|each crew/passenger||200 lbs.||including clothing, worn equipment, etc., for planning purposes|
|emergency supplies||100 lbs.||per person aboard|
|each passenger seat||10 lbs.||could be tossed out in emergency|
|gasoline, per gallon||six lbs.||4620 lbs. when all tanks filledy|
|lube oil, per gallon||7.5 lbs.||180 lbs. fully loaded|
|radio set||150 lbs.||could be tossed out in emergency|
|husky sled dog||90 lbs.|
|dog sled||100 lbs.|
|oxygen tank||20 lbs.||80 cubic feet of oxygen, good for 16 man-hours of work|
|height||12’ 2"||standing on landing gear|
|cruise speed||170 miles per hour|
|max speed||200 miles per hour|
|stall speed||60 miles per hour||flaps down|
|ceiling||25,400’||assuming not above max total weight limit|
|range||up to 2600 miles||depending on fuel amount carried|
|takeoff/landing||900’ at maximum gross||as little as 600’ light; 1200’ landing on skis|