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Nord NC-701 Martinet — S.N.C.A.C. Aircraft Technical Descriptive Manual
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Nord NC-701 Martinet — S.N.C.A.C. Aircraft Technical Descriptive Manual

The Nord NC-701 Martinet is a French post-WWII twin-engine light transport, aerial photogrammetry, and advanced trainer aircraft developed by SNCAC (Société Nationale de Constructions Aéronautiques du Centre). A direct engineering evolution of the German Siebel Si 204D, the Martinet was adopted across multiple French military and civil roles and exported to allied operators including LOT Polish Airlines and the Swedish government.

This archival edition reproduces the original factory documentation compiled under reference S.N.C.A.C. Notice Technique No. 701.01 — Notice Descriptive, covering the Type de Base No. 701 and its operational variants (Types II through V: Marine, D.T.A., État-Major, École de Navigation, and Mission Photographique).

1. Airframe & Aerodynamic Configuration

  • Configuration: Low-wing cantilever monoplane — all-metal duralumin semi-monocoque fuselage
  • Wing Structure: Single-spar wing with trailing-edge split (crocodile) flaps for high-drag steep approaches
  • Control Surfaces: Fabric-covered ailerons and elevators — minimised weight and flutter tendency
  • Nose Section: Fully glazed, unstepped ogival nose — optimised for student navigator and bomb-aimer visibility
  • Empennage: Twin vertical stabiliser and rudder layout — positive directional control and asymmetric yaw management on single-engine operations
  • Longitudinal Trim: Adjustable horizontal stabiliser to counteract pitch moments from CG shifts and flap deployment

2. Powerplant — Renault 12S-00

  • Engine Type: Twin Renault 12S-00 — air-cooled, inverted V-12 inline; French derivative of the wartime Argus As 411A1
  • Takeoff Power: 580 hp (427 kW) at sea level
  • Continuous Power: 390 hp (287 kW)
  • Supercharger: Single-stage mechanically driven centrifugal supercharger with elastic drive coupling — rated to critical altitude of 2,400 m
  • Propeller: Variable-pitch three-bladed propellers (upgrade over original German two-bladed design)

3. Performance Data

  • Maximum Speed: 350 km/h (220 mph) at 3,000 m
  • Cruising Speed: 325 km/h (202 mph) at 3,000 m
  • Landing / Stall Speed: 115 km/h (71 mph) — flaps fully extended
  • Rate of Climb: 5.3 m/s (1,043 ft/min) at maximum continuous power
  • Service Ceiling: 6,400 m (21,000 ft)
  • Operational Range: 810 km (500 mi) standard; up to 1,400 km with auxiliary ferry tanks
  • Empty Weight: 3,860 kg (passenger layout) / 3,920 kg (aerial photography configuration)
  • MTOW: 5,600 kg

4. Handling, Stability & Systems

  • Ice Mitigation: Hot-air de-icing ducts integrated into windscreen and flight deck viewing panels
  • Flight Controls: Dual control posts with disconnect capability; electro-hydraulic flap command system
  • Undercarriage: Retractable tricycle gear — mechanical, hydraulic, and electrical actuation with manual emergency backup and braking

5. Operational Variants & Engineering Bulletins

  • Aérophotogrammétrie Conversion: Heavy KF radio station, dual automated floor cameras, rear darkroom compartment — operated by LOT Polish Airlines and the Swedish government for mapping missions
  • Sanitary Evacuation Variant: Cabin conversion for medical evacuation litters — seat removal procedure documented in technical bulletins
  • Magnetic Mine Sweeping (NC-701 No. 8): Structural retrofit of Airframe No. 8 for French Navy magnetic mine detonation trigger array testing — unique engineering bulletin

Document Manifest — Notice Technique No. 701.01

Notice Descriptive — S.N.C.A.C., Numéro 701.01

  • Planeur — Voilure (Wing Assembly): Caissons AV/AR internes et externes, longeron principal, extrémités d'aile, raccord voilure-fuselage
  • Aileron, Volets d'Intrados, Bâti Moteur Intermédiaire et Capotage
  • Fuselage — Partie AV (Cabine Pilote), Partie Médiane, Partie AR, Pointe AR
  • Commandes de Vol — Gauchissement, Profondeur, Direction, Flettners, Volets d'Intrados
  • Empennages Horizontaux et Verticaux (Dérives, Gouvernails)
  • Atterrisseurs AV et AR — Commande de Train Rentrant (mécanique, hydraulique, électrique), Freinage, Carénage
  • Accessibilité et Démontabilité
  • Groupe Moto-Propulseur — Moteurs, Commandes Moteurs, Démarrage, Alimentation (Essence, Amorçage, Transvasement), Graissage, Refroidissement, Hélices
  • Matériel d'Équipement — Instruments de Pilotage et Navigation, Contrôle Moteurs, Changement de Pas d'Hélice, Escamotage de Train, Volets d'Intrados, Flettners
  • Matériel Électrique, Radio Électrique, Radio Goniométrie, Photographique, Téléphonique
  • Installation d'Oxygène, Matériels Divers
  • Installation de l'Équipage et des Passagers
  • Table des Figures — 23 numbered figures (pp. 14–45) covering wing, fuselage, flight controls, and electro-hydraulic schematics

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 authorised distributor.

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