Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 278

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PIPER CHEROKEE WARRIOR SERVICE MANUAL

Relative humidity may be obtained using a psychrometric chart

(Figure 8-39) if the outside air temperature, and dew point, or

wet bulb are known.

b. Head aircraft into the wind.

c. Apply full throttle. Avoid prolonged runs at full power.

d. Allow oil temperature to reach at least 80 degrees F.

e. Record the test static rpm using the Vu-thru tachometer and engine oil temperature.

If wind speed exceeds 10 knots, record static rpm and oil

t e mperature into the wind, left crosswind, downwind, and right

crosswind. Average the four test static rpm values.

f. With OAT and relative humidity, read static rpm from Figure 8-37.

g. With the oil temperature and OAT, read delta rpm from Figure 8-38.

h. Subtract the delta rpm obtained from Figure 8-38, from the static rpm obtained from Figure 8-37.

This is the BASELINE.

8-56. TEST RESULTS

The tested static rpm from the Vu-thru tachometer shall be within the tolerance specified in Table VIII-II of

the BASELINE static rpm.

Added: February 28, 1995

TABLE VIII-II. PROPELLER APPLICABILITY

THIS SPACE INTENTIONALLY LEFT BLANK

Island Enterprises

Tolerance of BASELINE

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