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REGULATIONS

SECTION 3042                             CLIMB
A. AT 500 FEET

  1. After 500 feet of altitude has been attained, the engines may be set for cruising climb power output.
2. it is recommended that all cruising climbs be made at 120 MPH indicated air speed except when emergency or icing conditions require faster rates of climb with more horsepower. 

GR-1820G-102                         R-1830-92

3. With 1900 REF set manifold       With 2050 RPM set manifold
pressure for 500 climb horse        pressure for 645 climb horse 
power using GR-1820-G-102            power using automatic rich
power calculator to obtain          side of S1C3-G power calculator
correct boost setting.              to obtain correct boost setting.

4. Use F/A mixture ranging from     Use "auto rich" position of the 
.083 to .090 for normal             mixture control for cruise climb
cruise climb at 120 MPH in-         leaving cowl flaps in the "trail"
dicated airspeed or over.           position. Maximum permissible
Use .082 to .085 F/A If cyl-        head temperature for take-off
inder heads are running below       or for rated power is 500 degrees F.
350 degrees F or .086 to .090 F/A   (260 degrees C). The maximum allowable
when head temperatures run          for cruising is 450 degrees F (232 degrees C)
above 350 degrees F. If head tem-   and it is desirable to maintain 
peratures run above 400 degrees F   temperature within this limit
use "Full Rich" mixture. Un-        during climb. In order to do so, 
less head temperatures can          it may be necessary to set the 
be maintained within limits         cowl flaps in some intermediate
by using higher F/A, in-            position between "open" and 
crease the climbing air-            "Closed". This may be accom-
speed 10 or 20 MPH. A               plished by moving the cowl flap
limiting head temp. of              control valve to "open" momen-
500 degrees F. is permissible for   tarily, then returning it im-
first 15 minutes of flight          mediately to "off" when the flaps
until the head temp. can            have opened a small amount. By
stabilize after which the           repeating this momentary movement
maximum for climb or cruise         of the flap control valve, the 
is 400 degrees F                    flaps can be set in any inter-
                                    mediate position, turning the
                                    flaps can be set in any inter-
                                    mediate position, turning the 
                                    valve to "off" in order to main-
tain them in that position. With cowl flaps partially open at low airspeeds, a slight buffeting may occur due to the blanketing effect on the tail surfaces. It is therefore frequently advisable to increase climbing airspeed to 130 or 140 MPH rather than open cowl flaps excessively in order to maintain the desired head temperatures.