ASTM F2352-09

1.1 This specification covers the manufacture of gyroplanes. This specification includes design and performance requirements for light sport gyroplane aircraft.

1.2 This specification applies to light gyroplane aircraft seeking civil aviation authority approval in the form of flight certificates, flight permits, or other like documentation.

1.3 A gyroplane for the purposes of this specification is defined as a rotorcraft to be used for day VFR only, with rotor blades that are not engine-driven in flight and are supported in flight by the reaction of the air on a single rotor that rotates freely on a substantially vertical axis when the aircraft is in horizontal flight.

1.4 These requirements apply to light gyroplanes of orthodox design. Aircraft having the following basic features will be so regarded:

1.4.1 Rotors of either fixed collective pitch or collective pitch control that are not adjustable in flight,

1.4.2 Single engine with fixed or ground adjustable pitch propeller,

1.4.3 No more than two occupant seats, and

1.4.4 A maximum gross weight (MGW) of 725 kg (1600 lb) or less.

1.5 Where it can be shown that a particular feature is similar in all significant respects to a feature that has historically demonstrated compliance with this specification and can be considered a separate entity in terms of its operation, that feature shall be deemed to be applicable and in compliance with this specification.

1.6 Where these requirements are inappropriate to particular design and construction features, it will be necessary to submit an appropriate amendment of this specification to ASTM Committee F37 on Light Sport Aircraft for consideration and approval.

1.7 The values in SI units are to be regarded as the standard. The values in parentheses are for information only.

1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

1.9 Table of Contents:

	Section
Scope	1
Table of Contents	1.9
Referenced Documents	2
Terminology	3
Definitions	3.1
Acronyms	3.2
Flight	4
General	4.1
Performance	4.2
Controllability and Maneuverability	4.3
Longitudinal Lateral and Directional Control	4.4
Stability	4.5
Ground-Handling Characteristics	4.6
Miscellaneous Flight Requirements	4.7
Structure	5
General	5.1
Flight Loads	5.2
Engine Torque	5.3
Control System Loads	5.4
Stabilizing and Control Surfaces	5.5
Ground Loads	5.6
Main Component Requirements	5.7
Emergency Landing Conditions	5.8
Other Loads	5.9
Design and Construction	6
General	6.1
Materials	6.2
Fabrication Methods	6.3
Locking of Connections	6.4
Protection of Structure	6.5
Inspection	6.6
Provisions for Rigging and Derigging	6.7
Material Strength Properties and Design Values	6.8
Fatigue Strength	6.9
Special Factors of Safety	6.10
Bearing Factors	6.10.2
Fitting Factors	6.10.3
Cable Factor	6.10.4
Rotor Components Factor	6.10.5
Flutter Prevention and Structural Stiffness	6.11
Control Surfaces and Rotors	6.12
Control Surface Installations (Other Than Rotor Blades)	6.13
Control Surface Hinges (Other Than Rotor Blades)	6.14
Rotor Mass Balance	6.15
Rotor Blade Clearance	6.16
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