RAM Aircraft Modification, Inc.
Waco - Madison Cooper Airport
150 Hour endurance test A.C. 20-24A
All requirements to comply with
with specific variables for TS10-520B engine.
XcelPlus Formula 102 Aircraft Engine Protection for Piston Engines up to 1,000
XcelPlus Aircraft Piston Engine Treatment Formula 102 was accepted for use in
aircraft piston engines in the fall of 1981.
B. To be accepted, XcelPlus Aircraft Formula had to pass
the150 hour endurance test A.C. 20-24A.
II. The test
XcelPlus Aircraft Piston Engine Treatment Formula 102 was tested in an
overhauled Teledyne Continental TS10-520-KSB 285 HP turbo supercharged
reciprocating aircraft engine prepared to simulate an engine with 700 hours
B. The test was designed to put maximum load and wear on the engine in a
relatively short time.
To accomplish this:
a. Cylinder head temperature ranged from 410 to 460
degrees F (210 - 238 ºC)
b. Normal cylinder head temperatures range from 320
degrees to 380 degrees F (160 - 193 ºC)
c. During test, oil temperature ranged from 230
degrees to 250 degrees F (110 - 121 ºC)
d. Normally, oil temperatures range from 145 degrees
to 195 degrees F (63 - 91 ºC)
C. Simulated critical altitude was 16,000 feet (4,877 m) - was done by
restricting the air intake.
D. Completed test produced conditions which were equal to 1,400 hours
of normal wear on a mid-time engine. Normal T.B.O. on this engine is
E. All parts of the engine were spectrolite air-gauge micrometer
measured before the test.
After the test, the engine was disassembled and all parts were spectrolite
air-gauge micrometer measured.
B. Some of the findings:
Crankshaft maximum net
wear at any measurable point was 4 ten thousandths of an inch (0.0004").
Turbo chargers - 1 ten
thousandths (0.0001") wear maximum at any measurable point.
Camshaft - 0.0000"
Valve stems - 0.0000"
with oil, gaskets, miscellaneous greases and sealant used in engine
Oil analysis showed 1 to
2 parts per million (PPM) solids after protection with Formula 102; normally up
to 10 to 11 PPM.
C. Friction test results - "From this data it is assumed that
engine friction at take off and cruise
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 to approximately
11 percent of net
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 -
equal to a full T.B.O."
"I would consider all findings to be better than acceptable standards."
George Altgelt FAA DER SW-246
XcelPlus formulas tested under different private label