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Aviation History
1981
1981 - 0092.PDF
86 FLIGHT International, 10 January 1981 7^\ ~!3JBfcfi* Two integral fuel tanks form part of the load-carrying structure formed polycarbonate half-shells assembled by thermal spot welding. Easy access to the baggage compart ments is provided by wide doors and there is ample room for large suit cases. Total volume available is 35ft3 and permissible loads are 2201b in the right-hand compartment, 2651b in the left-hand compartment and 1761b in the rear compartment. Bucket seats with 5in of horizontal adjustment are normally supplied for the pilots. Pas senger seats are two foldable two- place units all fitted with safety belts. The cabin has variable position in terior lighting and individual ventila tion nozzles backed up by general ventilation from the front. Each door has a sliding window and the front doors are jettisonable. Standard equipment includes an electrical power point, document holder on each door and a fire extinguisher at the foot of the pilot's starboard seat. Optional equipment includes sound proofing upholstery with carpet, four arm-rests to adapt the rear seats to three roomier seats with cushions removed, and additional comfort trimmings. The cabin is readily con verted for transport of internal loads. An area of 28ft2 is available by fold ing the rear seats and removing the left-hand front seat. This seat may be stowed in the rear luggage compart ment. The cabin floor is made of thick aluminium alloy plate which can withstand 1321b/ft2. Eleven recessed tie-down points with a maximum load capacity of 2,2001b are provided. Access to the cabin is facilitated by a footstep on each landing gear skid and three footholds provide access to the main gearbox and main rotor shaft for inspection and maintenance. Full provision has been made for installation of dual controls, which may be fitted easily with a quick lock ing system. Four single-body servo units, operating at 570 p.s.i., are Sleek Twin Squirrel installed in the cyclic, collective and yaw control linkages. Three units actuate the swashplate directly while the fourth, at the front of the tail boom, controls the tail rotor by means of a long guide rod. Each of the three main servos is fitted with an accumu lator and a non-return valve which, in the event of hydraulic power failure, allows adequate time for the pilot to assume an attitude where control forces would be acceptable to continue flight. At around £350,000 equipped, the Twin Squirrel should prove very attractive to the businessman and specialist offshore operator, but it re tains the quality and excellent looks that are bound to attract quite a few VIP customers as well. Aerospatiale has carved itself a niche in the civil helicopter market with Twin Squirrel by examining the market requirements and being able to respond quickly. E
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