RAM AIRCRAFT MODIFICATION Waco - Madison Cooper Airport
150 HOUR ENDURANCE TEST A.C. 20 - 24 A
All requirements to comply with FAR 33.49 with specific variables for TS 10 - 520B engine.
Bishop´s Original Formula 102 Aircraft Engine Treatment For Piston Engines up to 1000 HP
A. Bishop´s Original Aircraft Piston Engine Treatment Formula 102 was accepted for use in piston engines aircraft in the fall of 1981. B. To be accepted, Bishop´s Original Aircraft formula had to pass the 150 hour endurance test A.C. 20 - 24A.
II. THE TEST
A. Bishop´s Original Aircraft Piston Engine Treatment Formula 102 was tested in an overhauled Teledyne Continental TS10 - 520 - KCB 285 H.P. turbo supercharged reciprocating engine prepared to simulate an engine with 700 hours flying time.
B. Test was designed to put maximum load and wear on the engine in a relatively short time. To accomplish this: a. Cylinder head temperatures ranged from 410 to 460 degrees F. b. Normal cylinder head temperatures range from 320 degrees to 380 degrees F. c. During test, oil temperatures ranged from 230 degrees to 250 degrees F. d. Normally, oil temperatures range from 145 degrees to 195 degrees F.
C. Simulated critical altitude was 16,000 feet - was done by restricting the air intake.
D. Completed test produced conditions which were equal to 1400 hours of normal wear on a mid-time engine. Normal TBO on this engine is 1400 hours. E. All parts of the engine were spectrolite air-gauge micrometer measured before the test.
III. THE RESULTS
A. After the test, the engine was disassembled and all parts were spectrolite air-gauge micrometer measured.
B. Some of the findings: 1. Crankshaft maximum net wear at any measurable point was 4 ten thousands of an inch (0.0004"). 2. Turbochargers - 1 ten thousands ( 0.0001") wear maximum at any measurable point. 3. Camschaft - 0.0000" journal wear. 4. Valve stems - 0.0000" wear. 5. Complete compatibility with oil, gaskets, miscellaneous greases and salant used in engine construction. 6. Oil analysis showed 1 to 2 parts per million solids with Bishop´s Original; normally up to 10 to 11 parts per million.
C. Friction test results - "From this data it is assumed that engine friction at takes off and cruise RPM´s is lowered 25 to 30 percent. Engine friction in this engine is approximately 15 percent of net horsepower. A reduction in friction of 30 percent would mean a reduction in total friction from 15 percent of net horsepower."
D. Oil consumption - "Normally acceptable oil consumption under full power averages one quart per two hours. Oil consumption after ten hours of testing was only one pint."
E. Independent inspection report - "This type engine test - 150 hours at elevated power out put at maximum oil temperature as specified by the FAA TIA - is equal to a full T.B.O."
" I would consider all findings to be better then acceptable standards."
__________________ George Altgelt FAA DER SW - 246
This report was furnished in its entirety to the manufacturer and has been shown in this abbreviated short form to be concise.
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