Internal Spec Sheets for the “China Clipper”--Flying Boat Martin Model 130 (1932)

Glenn L. Martin Company. Detail Specification for Pan American Long Range Air Mail Flying Boat Martin Model 130. GLM Spec #17, February 23,1932.

This looks to be some sort of odd photographic reproduction from 1932, produced by GLM Co.. 11”x 8.5”, with 20pp, 2pp, and 5pp. Numerous annotations in a contemporary hand. Rare. No copies located in WorldCat. $500

It seems as though sheet 2 is missing, though a hand-written note seems to imply (?) that the contents of page 2 is included in an appendix, though I can't determine that.

Bound in a metal-clasp heavier paper wrapper, in a Glenn L. Martin portfolio. I assume that this had a very limited distribution, thinking that this was circulated much beyond GLM Co and Pan American.

This is signed by the VP and chief engineer at GLM, Lessiter C. Milburn (who was one of the first 23 Fellows of the Institute Aeronautical Sciences, 1932, along with such headliners as Lymann Briggs, W. Diehl, Donalf Douglas, Glenn Martin, John Northrup, I. Sikorsky, T. van Karman, and others. He was later president of Balanca Aircraft Corp.)

“The Martin M-130 was a commercial flying boat designed and built in 1935 by the Glenn L. Martin Company in Baltimore, Maryland, for Pan American Airways. Three were built: the China Clipper, the Philippine Clipper and the Hawaii Clipper...Martin named them the Martin Ocean Transports, but to the public they were the "China Clippers", a name that became a generic term for Pan Am's large flying boats – the Martin M-130, Sikorsky S-42, and Boeing 314.”--Wikipedia

The contents of the work includes a (1) general section (pp 1-19); pg 20 is a list of appendices numbered I, II, and III, though only (2) appendix III (2pp) is bound here. There is a third section (3) “Supplement 'A' ”, 5pp., that is not listed as part of the introduction.

Contents:

(1) General contents pp 1-19.

Section A, “General”: data on horsepower, unit weights, unit loadings, performance at various altitutdes, description of plane compartments, specs on fuel/passengers/cargo; material of the hull, hull design. Section B: “Structure Strength”, includes wing group (wing structure and engineering), tail group, body group, hull structure, pilot compartment, passenger compartment. Section C: power plant; engines, propellers, starting system, cooling system, lubricating systems, fuel systems. Section D: equipment; flight control, furnishings (seats, flooring,m windows, bunks), electrical and operating equipment. Section E: useful load.

(2) Appendix III: surfacing

(3) Supplement “A”: Supplement A is a tight 5pp including a page of single-entry items on the aircraft and their weight; an overview of performance/speed at different hp and rpms; section on the arrangement of the hull interior; passenger compartments.

General characteristics

• Crew: six-nine (Captain, First Officer, Junior Flight Officer, Engineering Officer, Assistant Engineering Officer, Radio Operator, Navigation Officer, plus cabin stewards)

• Capacity: 36 day, 18 night passengers

• Length: 90 ft 10 ½ in (27.7 m)

• Wingspan: 130 ft (39.7 m)

• Height: 24 ft 7 in (7.5 m)

• Max. takeoff weight: 52,252 lb (23,701 kg)

• Power plant: 4 × Pratt & Whitney R-1830-S2A5G Twin Wasp 14-cylinder radial engines, 830 hp (708 kW) later 950 hp with hydromatic propellers each

• Performance

• Maximum speed: 180 mph (290 km/h)

• Cruise speed: 130 mph (209 km/h)

• Range: 3,200 mi (5,150 km)

• Service ceiling: 10,000 ft (3,048 m)