Cessna 172

172 R vs S:

• identical engine
• both fuel injected
• only propellers are different:
  • R cruise propeller, 2400 rpm, 160 hp, quieter due to lower rpm.
  • S climb propeller, 2700 rpm, 180 hp; has 60+ lb extra load (509 lb pilot + passenger)

172 N vs R/S

• N is carbureted. R and S are fuel injected.
• N flap is 20/30/40, R / S is 10/20/30; N can slow down and descend faster due to the 10 extra flap.

Trim

Trim is only found on the right side.

Pitot-static

• a heated pitot head under the left wing
• static port on the left side of the nose cowling. The alternate static source is located on the panel above the throttle and supplies static pressure from inside the cockpit.