- Holder
- General Electric Company
- Revision
- 12
- Revised
- July 16, 1986
- Status
- Current
- Product
- Engine
- Certification basis
- CAR 13
- Models
- 1
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 1
| Model | Also known as | Note |
|---|---|---|
| CT64-820-4 |
Airworthiness directives · 3
ADs whose products are models on this data sheet, matched by model and maker.
Registered aircraft
Registry models that point at this data sheet, with their registered aircraft.
What the data sheet says
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Page No. 1 2 3 4
Rev. No. 12 12 12 12
Reformatted 10/94
DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
E13EA
Revision 12
GENERAL ELECTRIC
CT64-820-4
July 16, 1986
TYPE CERTIFICATE DATA SHEET NO. E13EA
Engines of models described herein conforming with this data sheet (which is a part of Type Certificate No. E13EA) and other
approved data on file with the Federal Aviation Administration, meet the minimum standards for use in certificated aircraft in
accordance with pertinent aircraft data sheets and applicable portions of the Federal Aviation Regulations provided they are
installed, operated, and maintained as prescribed by the approved manufacturer's manuals and other approved instructions.
Type Certificate Holder: General Electric Company
Aircraft Engine Group
Lynn, Massachusetts 01910
Model Type CT64-820-4
Axial Flow 14 Stage Compressor
Annular combustor
2 Stage Gas Generator Turbine
2 Stage Free Power Turbine
Turboprop
Reduction Ratio 13.44:1
Propeller Shaft above
Power Unit Centerline
Ratings
Maximum continuous at sea level:
Equivalent Shaft, hp 2830
Shaft, hp. 2745
Thrust, lb. 213
Output, r.p.m. (See NOTE 2) 1015
Takeoff (5 min.) at sea level:
Equivalent Shaft hp. 3227
Shaft hp. 3133
Thrust, lb. 236
Output, r.p.m. (See NOTE 2) 1160
Propeller Shaft AND 10152-60A
Fuel Control Ham. Std. Model JFC-42-2
(Turboprop), & Pesco
(Sundstrand) type 023966, 024836 gear type fuel pump
Fuel Fuel conforming to G.E. Jet Fuel Spec. No. D50TF2, current revision.
Kerosene JP-4 & JP-5 fuels are acceptable
Oil Synthetic type conforming to G.E. specification D50TF1, current revision
Principal Dimensions
Length, in. 110.20
Width, in. 26.90
Height, in. 40.40
Weight (dry) lb. 1145
(includes essential engine accessories & torque sensor for CT64-820-4 only)
Center of Gravity Location, in.,
Forward of rear mount forward face 19.76
E13EA 2
Model Type CT64-820-4
Engine Centerline above 1.89 left 0.30
Ignition System (20-29 volts D.C., 150 watts) Bendix Scintilla type 10-324830 or General Laboratory Associates type
43661 dual ignition unit with two ignitor plugs Champion type FHE111
NOTES 1 through 12
Certification basis:
Regulations & Amendments Model Date of Application
Date Type Certificate
No. E13EA Issued/Revised Inactive
CAR 13 effective June 15, 1956 CT64-410-1 September 19, 1963 March 25, 1965 August 30, 1967
as amended by 13-1, 13-2, 13-3, CT64-610-1 September 19, 1963 March 25, 1965 August 30, 1967
13-4, 13-5, & 13-6 CT64-810-1 September 19, 1963 March 25, 1965 April 29, 1971
T64-GE-10 September 19, 1963 March 25, 1965 April 29, 1971
CT64-820-1 February 26, 1965 January 27, 1967 April 24, 1975
CT64-820-2 January 9, 1967 January 27, 1967 April 24, 1975
CT64-820-3 May 4, 1973 May 31, 1973 April 24, 1975
CT64-820-4 February 12, 1974 October 21, 1974
CT64-630-1 February 15, 1966 June 28, 1968 May 20, 1983
T64-GE-16 May 15, 1967 June 28, 1968 May 20, 1983
CT64-630-1A March 11, 1970 April 15, 1971 May 20, 1983
Production basis: Production Certificate No. 107
NOTE 1. Maximum permissible temperatures: CT64-820-4
Power turbine inlet (T5)*
Takeoff 1370°F
Maximum continuous 1300°F
Starting 1650°F (3 sec.)
Oil Inlet 240°F
*The power turbine inlet gas temperature is measured by thermocouples mounted in a radial plane in the turbine
casing (14 thermocouples, 820-4).
NOTE 2. Engine Rotor Speeds, r.p.m.:
CT64-820-4
Gas Generator (maximum permissible)
Takeoff 18,230
Maximum continuous 17,800
Overspeed (10 seconds) 18,500
Output Shaft
Operating Range
Maximum 1,160*
Nominal 1.015*
Overspeed (Max. permissible, 5 sec.) 1,450*
*Propellers to be used with this engine must have the functioning characteristics compatible with the engine and
control system. When these limits are exceeded, refer to General Electric Operation Instruction SEI-447 for
appropriate action.
3 E13EA
NOTE 3. Fuel and Oil Pressure Limits: CT64-820-4
Fuel
Inlet Pressure 50 p.s.i.g. maximum
No Boost 0.45 V/L (Maximum)
S.L. to 6000 ft.
Oil Pump Discharge
Ground idle
Engine 10 p.s.i.g. minimum
Speed Decreaser Gear 5 p.s.i.g. minimum
Operating Range
Engine 50-90 p.s.i.d.
Speed Decreaser Gear 60-95 p.s.i.d.
Refer to applicable Operating/Maintenance Instructions for operating range limits and for reduced oil pressure limits
above 15,000 feet altitude.
NOTE 4. Accessory Drive Provisions:
Drives Type
Direction of
Rotation* Speed, r.p.m.
Maximum Torque
in. lb.
Engine Gearcase Cont Static
Engine Tach Generator AND 20005 Type XVB
Modified
CC 0.246** 7 50
Starter (used as starter pad) AND 20002 Type X11S
Modified
C 0.697** 1370 3000
Starter (used as driving pad) AND 20002 Type X11S
Modified
C 0.697** 370 (1) 3000
Fluid Power Pump AND 20002 Type X11J CC 0.259** 1000 (1) 4400
Speed Decreaser Gearcase
Power Turbine Tach Generator AND 20005 Type XVB C 0.270*** 7 50
Fluid Power Pump AND 20002 Type X11J
Modified
C 0.237*** 600 2700
Fluid Power Pump AND 20000 Type XA
Modified
CC 0.233*** 100 800
* - Facing pad, "C" - Clockwise; "CC" - Counter-clockwise
** - Times gas generator r.p.m.
*** - Times power turbine r.p.m.
(1) Total combined power extraction from gas generator accessory gearcase pads not to exceed 55.6 s. hp. Refer to General
Electric Installation Manual SEI-123 and SEI-429 for further accessory drive power limitations.
NOTE 5. Engine ratings are based on calibrated test stand performance under the following conditions:
Standard sea level static conditions of 59°F and 14.696 p.s.i.a.
Air inlet as defined by G.E. Drawing 1076678-335
Jet nozzle area of 450 sq. in.
No external air bleed or accessory drive loads
No anti-icing airflow
ESHP = Jet Thrust, lb./2.5 + s. hp.
Engines with individual performance characteristics and capabilities to develop the low temperature power ratings
noted above at higher ambient temperatures may be operated up to these power limits at any ambient conditions
providing the limits on all other engine parameters are not exceeded.
The CT64-820-4 model is flat rated at 3133 shaft h.p. to 100°F for takeoff and 2745 shaft h.p. to 86°F for maximum
continuous.
Performance data is further described in General Electric Specification Nos. E1209 (CT64-820-4).
E13EA 4
NOTE 6. Maximum permissible continuous air bleed extraction is 6%. See General Electric Installation Manual SEI-429 for
further limitations.
NOTE 7. Output Shaft Torque Limits (ft. -lb.)
CT64-820-4
Transient (5 sec.) 21,800
Steady state 14,200
NOTE 8. Torque signals are provided by the engine for airframe torque reading system.
NOTE 9. The CT64-820-4 engine when operating in icing conditions must have ignition on and be operated above flight idle.
NOTE 10. The only optional additives which may be used in approved fuels are as follows:
(1) Phillips PFA-55MB or anti-icing additives to specification MIL-1-27686E at a concentration not in excess of
0.15% by volume.
(2) S0H10 Biobor JF biocide additive at a concentration not in excess of 20 p.p.m. elemental boron (270 p.p.m.
total additive).
(3) Shell ASA-3 antistatic additive at a concentration that will provide not in excess of 300 conductivity units
which is approximately equivalent to 1 p.p.m.
NOTE 11. Certain engine parts are life limited. These limits are listed in CT64 Service Bulletin No. 93.
NOTE 12. Fuel venting emission control is not included on these engines; and therefore, beginning January 1, 1975, airframe
compliance must be provided.
.....END.....