AC 33-2A 5 June 1972 Appendix 1 Measured Gas Temperature (Maximum) (Max) Performance Ratings at Standard Sea Level Specific Fuel Consumption 1b/hr/1b thrust or 1b/hr/s.hp. (Maximum) 1b/hr Rotor (s) r.p.m. (Maximum) (Max) Static Conditions Jet Thrust Pounds (Minimum Rated) (Min) Table 1-(Preliminary) Shaft horsepower (Minimum Rated) (Max) RATINGS Takeoff (Wet) Takeoff (Dry) 30-Minute Power 22-Minute Power Maximum Continuous Maximum Reverse (Operating Parameter) Flight Idle Ground
5 June 1972 AC 33-2A Appendix 2 APPENDIX 2. RECIPROCATING ENGINE MODEL DESCRIPTION The model description is for the purpose of establishing those features of the engine that are involved in the certification and safe operation of the engine. The applicant should submit, where applicable, the following information plus any additional information which, in his opinion, is essential to the certification and safe operation of the engine:
a. Applicant's name.
b. Engine model, cylinder arrangement, number of cylinders, valve arrangement, cycle used, and type of cooling, etc.
c. Performance ratings as defined in FAR, Part 1. (See Table 2.)
d. Performance charts consistent with the ratings.
e. Design structural loading envelope for mounting attachments and maximum allowable loads.
f. Maximum time engine may be operated under negative and zero 'g" conditions.
g. Maximum permissible temperature limits and cooling criteria for engine components and accessories.
(1) Type and location of thermocouples used for cooling test.
(2) Description of temperature sensing provisions.
h. Maximum carburetor air inlet duct attachment loads.
(1) Shear load.
(2) Loads normal to mounting surfaces.
(3) Overhang moment.
i. Lubrication system.
(1) Oil grade, type, and specification.
(2) Oil consumption rate (normal and maximum).
(3) Oil inlet pressure limits.
(4) Oil system vent pressure limits.
(5) Oil inlet and scavenge temperature limits.
AC 33-2A 5 June 1972 Appendix 2
(6) Inlet oil flow rate.
(7) Usable oil capacity, if oil tank is part of enginc.
(8) Maximum heat rejection to oil including turbosuperchargers.
(9) Oil pump outlet pressure limits for normal operation and idle, if oil tank is not part of engine.
(10) Oil filter provisions and requirements.
(11) Oil pressure limits for propeller governing engine oil passages.
j. Fuel system.
(1) Grade, type, and specification.
(2) Fuel inlet pressure limits.
(3) Inlet fuel flow rate (maximum).
(4) Method of providing for carburetor icing precautions.
(5) Fuel filter provisions and requirements.
k. Maximum permissible exhaust attachment loads.
(1) Shear loads.
(2) Loads normal to mounting surfaces.
(3) Overhang moment.
1. Accessory attachments. For each aircraft accessory drive, give the following information:
(1) Type of drive and mounting arrangement.
(2) Direction of rotation.
(3) Static torque (maximum limit).
(4) Continuous torque (limit).
(5) Drive speed ratio with crankshaft..
(6) Maximum overhang moment.
AC 33-2A 5 June 1972 Appendix 2
(7) Vibration limits (if applicable).
m. Output shaft.
(1) Maximum steady state allowable torque or power limits of the output shaft.
(2) Maximum allowable transient power output torque.
(3) Maximum bending load limits on the output shaft.
(4) The type and dimensions of the output shaft, direction of rotation, speed ratio with crankshaft, and nominal speed.
n. Describe all instrumentation in detail. Describe provisions for connecting permanent and optional instrumentation including provisions for trend or condition monitoring equipment.
Give model designation, setting numbers, or other pertinent identifying information relative to the engine accessories or controls and special equipment such as:
(1) Carburetor, injectors, and subsystems.
(2) Ignition system.
(3) Spark plugs.
(4) Safety devices.
(5) Other accessories or components to be furnished as part of or with the engine.
(6) Optional accessories available with the engine for mounting on or for use with the engine.
Performance data should be presented in the form of suitable curves to portray the relationship of the various parameters of a minimum engine of the model including the effects of varying ambient temperature and altitude. The maximum or limiting air intake temperature(s) should be specified together with all other engine performance limitations.
(1) For engines incorporating manual mixture controls, performance charts should include data on rich and recommended lean operation.
AC 33-2A 5 June 1972 Appendix 2
(2) For engines to be used with variable pitch propellers and in helicopters, performance charts should include manifold pressure variations starting from several representative full throttle points in the engine operating speed range.
(3) For all engines, include altitude performance charts.
9 • The applicant should include in the engine description an installation drawing of the engine showing all the dimensions and details necessary for proper installation of the engine in an aircraft including mounting and mounting provisions.
r. The maximum radiated electronic interference produced by the engine.
s. Any additional information to describe adequately the operational and installational limitations of the engine.
t. Engine requirements for any externally supplied electricity.
u. Weight:
(1) Dry weight of complete engine with all required equipment and no residual fuel or oil.
(2) Weights of optional external equipment and accessories.
(3) Estimated weight of residual fuel and lube oil.
(4) Center of gravity location of engine (dry).
v. Mass moment of inertia of rotating system - frictional horsepower.
(1) Estimated effective mass moment of inertia of those engine rotating components involved in starting.
(2) Estimated mass moment of inertia of main engine rotating component assemblies.
5 June 1972 AC 33-2A Appendix 2 Manifold Pressure Limit TABLE 2 - PERFORMANCE RATINGS AT STANDARD SEA LEVEL CONDITIONS Cylinder Head & Base Temperatures (Maximum) Specific Fuel Consumption 1b/hr/hp (Maximum) RPM (Maximum) Shaft Horse Power -(Mini- mum Rated) Ratings Takeoff Wet Takeoff Dry Maximum Continuous Maximum Recommended Cruise LOW Recommended Cruise Idle Page 5