NA Design NA40 "Bongo"

Last crawled date: 1 year, 11 months ago

TYPE: Two-seat ultralight helicopter.

DESIGN FEATURES: Two-blade teetering rotor; pod and boom fuselage with inverted Y-tail unit. Cocomo patented anti-torque system eliminates the need for a tail rotor, reduces transmission complexity and operating noise level.

FLYING CONTROLS: Conventional cyclic and collective controls. Ducted air anti-torque system.

STRUCTURE: Mainly composites, including rotor blades; some aluminum in the fuselage, otherwise double-curvature monocoque sandwich; laminated, vacuum-formed elastomeric rotor head.

LANDING GEAR: Tubular twin-skid gear with ground handling wheels. Inflatable permanent or emergency floats are optional.

POWER PLANT: TWO 86kW Prvni Brnenska Strojina PBS Velka Bites ТЕ 50В turboshafts, with FADEC and dual ignition. Engines mounted side by side behind the cockpit; transmission via combining gearbox. Single self-sealing fuel tank beneath engines, capacity 210 liters.

ACCOMMODATION: Adjustable, foldable, and anatomically shaped seats for pilot and passenger. Baggage space aft of seats; provision for additional, aerodynamic baggage container under the fuselage. Gull-wing window/door on each side, hinged on centreline and opening upward.

SYSTEMS: Dual 27V DC electrical systems; external power receptacle.

AVIONICS: Instrumentation: VFR standard; IFR to be offered later.

EQUIPMENT: Rocket-deployed emergency recovery parachute optional.

Technical data for NA40 Bongo

Rotor diameter: 7.48m, fuselage length: 6.15m, height to top of rotorhead: 2.35m, empty weight, equipped: 480kg, max load on external sling: 250kg, max take-off weight: 950kg, never-exceed speed: 280km/h, max cruising speed: 250km/h, econ cruising speed: 230km/h, hovering ceiling IGE: 4,000m, max range: 500km