McDonnell F3H Demon — Primary-Source Technical & Engineering Archive

The McDonnell F3H Demon was the U.S. Navy's first swept-wing, carrier-based all-weather jet fighter — and one of the most technically troubled aircraft of the early Cold War era. Born from the ambition to field a supersonic fleet interceptor, the Demon's development was defined by the catastrophic failure of the Westinghouse J40 engine and the subsequent salvage operation that produced the operational F3H-2 series. This archival collection assembles six primary factory and military technical documents spanning the full F3H family, from the 1953 Combat Capability Report through the 1960 revised Illustrated Parts Breakdown.

1. Aerodynamic Configuration

• Wing Geometry: 35° swept wing spanning 35 ft 4 in — leading-edge slats and trailing-edge flaps for carrier compliance
• Airfoil Sections: Root — modified NACA 0006.77-1.13 32/0.77; Tip — modified NACA 0006.36-1.16 38/1.14
• Wing Area: 519 sq. ft — geometric aspect ratio 2.41
• Lateral Control: Upper-surface wing spoilers acting in conjunction with conventional ailerons for high-speed roll authority

2. Powerplant — J40 Failure & J71 Recovery

• F3H-1N (J40 Era): Westinghouse J40-W-22 — under 11,000 lbs thrust with afterburner; chronic failures led to immediate fleet grounding
• F3H-2 (J71 Era): Allison J71-A-2 turbojet — 10,200 lbs military thrust / 14,500 lbs with afterburner; single-engine layout
• Environmental Sensitivity: Early technical notes document severe compressor flameout vulnerability in heavy rain ingestion conditions

3. Handling & Stability Studies

• Pitch-Up Tendency: Prototypes exhibited severe high-altitude pitch-up near buffet boundaries during hard manoeuvres
• Yaw Damping: Pulsed-tail techniques mapped yaw damping characteristics; vertical tail surface enlarged in later revisions
• Speed-Brake Revision: Actuator redesign resolved low roll rates identified in early handling trials
• Low-Speed Regime: High wing loading created dangerous power-curve recovery conditions on carrier approach — modified afterburner systems introduced to reduce accident rate

4. Performance Data — F3H-2N (Certified U.S. Navy Parameters)

• Maximum Speed (Sea Level): 628 knots / Mach 0.95
• Maximum Speed (35,000 ft): 562 knots / Mach 0.98
• Initial Rate of Climb: 12,795 ft/min
• Time to 30,000 ft: ~9.8 minutes
• Service Ceiling: 35,050 – 42,650 ft (weight-dependent)
• Power-Off Stall Speed: 109.5 knots at combat weight
• Take-Off Gross Weight: 31,760 lbs (internal fuel)

5. Engineering Bulletins

• Weight Growth: Transition from daytime interceptor to all-weather missile fighter added ~7,000 lbs of equipment — restricting level-flight supersonic performance
• Hydraulic Subsystems: Dual utility system recurrent retrofits to resolve persistent primary control loop leaks in high-pressure lines
• Fuel Plumbing: Self-sealing fuel bladder configurations and starboard-side inflight refuelling probe kit installation procedures

Document Manifest

• MAC RPT 3125 — F3H Demon Combat Capability Report: McDonnell Aircraft Corporation Engineering Library — 1 September 1953. Originally classified Secret/Restricted Data under Atomic Energy Act 1946; declassified Group 4, downgraded at 3-year intervals, declassified after 12 years. Classification cancelled or changed to Unclassified by authority dated 11/15/68, Engineering Library 11/26/68.
• AN 01-245FCA-4 — Illustrated Parts Breakdown, Navy Model F3H-1N Airplanes: Published under authority of the Secretary of the Air Force and the Chief of the Bureau of Aeronautics — 15 September 1954
• Standard Aircraft Characteristics — F3H-1N “Demon”: McDonnell — 15 May 1955. Originally Confidential; declassified per Executive Order 11652.
• NAVAER 01-245FCB-2-1 — Handbook Maintenance Instructions, Navy Models F3H-2, -2M, -2N Airplanes, Section I — General Information: Published by direction of the Chief of the Bureau of Aeronautics — 15 September 1959. Supersedes Section I of NAVAER 01-245FCB-502 dated 15 May 1958 and Revised 1 April 1959.
• NAVAER 01-245FCB-504 — Illustrated Parts Breakdown, Navy Models F3H-2, -2M, -2N Airplanes: Published by direction of the Chief of the Bureau of Aeronautics — 15 February 1959, Revised 1 March 1960
• NAVWEPS 01-245FCB-501 — Flight Handbook, Navy Models F3H-2, -2M Aircraft: Published by direction of the Chief of the Bureau of Naval Weapons. Note: this publication is incomplete without Confidential Supplement NAVWEPS 01-245FCB-501A.

⚠️ 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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