Lodestar Aircraft Manuals Collection — Eight Primary-Source Documents

Before the jet age, before pressurization became standard, there was the Lodestar — a fast, elegant twin-engine transport that carried generals, cargo, and passengers across every theater of World War II. This collection brings together eight original factory and military documents covering every major variant ever built: Army, Navy, and British. From the drawing boards of Burbank to the flight lines of three Allied air forces, this is the complete engineering record of one of aviation's most versatile pre-war transports.

The Eight Documents

• Structural Repair Instructions — AN 01-75C-3 · A.P. No. 2487A, B · November 15, 1943
  Restricted — For Official Use Only (declassified archival copy)
  The most comprehensive document in this collection. Covers all three Allied services in a single volume: Army models C-56, C-56B, C-56C, C-56E, C-57, C-57B, C-59, C-60, C-60A, C-60A-1 and C-60A-5 · Navy models XR50-1, R50-1, R50-2, R50-3, R50-4, R50-5 and R50-6 · British models Lodestar IA and II. Published by Air Service Caravan Co., Inc., New Era Litho, New York.
• Erection and Maintenance Instructions — T.O. No. 01-75CE-2
  Army Model C-60A · Navy Model R50-6. The primary military maintenance reference for the principal production variants, covering rigging, systems servicing, and overhaul procedures.
• Maintenance Instructions — Model 18 — SD/11828
  Lockheed Aircraft Corporation, Burbank, California. The civil-variant factory maintenance manual, issued directly by the manufacturer for commercial and export operators of the Model 18 Lodestar.
• Maintenance and Parts Catalog
  Lockheed Aircraft Corporation. Combined maintenance and illustrated parts reference covering airframe systems, components, and part number identification for the Model 18 series.
• Contractor's Parts Catalog — Model C-60 Transport Airplane — T.O. No. 01-75CE-4 · February 10, 1942
  Lockheed Aircraft Corporation. The military illustrated parts catalog for the C-60 series, with assembly diagrams and part number breakdowns for procurement and depot-level maintenance.
• Service Instructions — Lodestar
  Lockheed Aircraft Corporation, Burbank, California. Factory service manual for civil operators, covering scheduled inspections, lubrication, and system servicing intervals.
• Operating Instructions — Lodestar
  Lockheed Aircraft Corporation, Burbank, California. The original pilot's operating handbook for the civil Model 18, with performance data, limitations, and normal and emergency procedures.
• Manual de Serviço — Lockheed-Lodestar
  Portuguese translation by Oscar Taves & Cia., Rio de Janeiro, July 1942. A rare operational document reflecting the Lodestar's export reach into South America during the war years — a piece of aviation history in its own right.

Aerodynamic & Engineering Profile

• Airfoil: Clark Y wing profile — proven, reliable, and optimized for high cruise efficiency.
• High-Lift Systems: Trailing-edge Fowler flaps interlinked with the ailerons, with distinctive external carriage rails protruding aft of the trailing edge.
• Wing Planform: Highly tapered for reduced induced drag at cruise speeds.
• Tail Assembly: Twin vertical fin and rudder configuration — engineered for directional control during engine-out scenarios.

Engine Technical Notes

• Powerplants: Wright R-1820-87 Cyclone or Pratt & Whitney R-1830-43 Twin Wasp — 1,200 hp (890 kW) per engine at takeoff.
• Propellers: Constant-speed, full-feathering 3-bladed Hydromatic.
• Fuel System: Integral wet-wing storage feeding individual mechanical engine-driven fuel pumps.

Performance Data — Wright R-1820-87 Variants

Technical Orders & Regulatory Reference

• USAAC Technical Orders: T.O. No. 01-75CF-1 (Preliminary Flight Instructions) · T.O. No. 01-75CF-2 (Service Manuals).
• Civil Operations: Governed by vintage type certificates under pre-April 1957 frameworks, with specific limitations on V_NE, bank angles, and VFR conditions unless updated instrumentation bulletins are applied.

Ideal For

• Restoration teams working on surviving Lodestar airframes
• Aviation historians and researchers covering WWII Allied transport operations
• Museums and institutions preserving pre-war and wartime commercial aviation heritage
• Warbird collectors and flight simulation researchers requiring primary-source data

⚠️ Regulatory Notice: Under FAA 14 CFR § 43.13 and EASA Part-M, any mechanic performing maintenance on an active aircraft must use current, manufacturer-approved revision-controlled data. This archival document does not satisfy that requirement.

This is an archival, static-copy edition fixed at its original publication date. Intended for historical reference, flight simulation, museum restoration, and educational use only. Not approved for active airworthiness maintenance under FAA 14 CFR § 43.13, EASA Part-M, or equivalent international regulations. Operators of active aircraft must use current, revision-controlled publications from the Type Certificate holder or an authorized distributor.
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