static RPM

static RPM

The maximum RPM of a reciprocating engine when it is not moving through the air. The static RPM is lower than when the aircraft is moving, as forward movement rams air into the carburetor inlet, increases manifold pressure, and, hence, increases the power. The propeller has a decreased angle of attack and, thus, decreased drag.
References in periodicals archive ?
A calibrated tachometer should be used to compare required static rpm listed on type certificate data sheets to the specified minimum or maximum full throttle rpm.
One owner told us that the static RPM increase on his 172 at nearly sea level demonstrated an increase in four HP using traditional horsepower versus RPM change calculations.
Static RPM (piston craft) must be at or above the expected number or abort.
For example, a Cessna 172 Skyhawk with a cruise prop likely will have a lower static rpm and reduced takeoff and climb performance.
Several sent in detailed before and after results, including static RPM readings, fuel flow, time-to-climb and full-throttle cruise speeds.
I found that my static RPM had gone from the low end of the allowable range to the high end, an increase of 150 RPM.
The letters stand for: RPM-ensure it's full-rated RPM, or expected static RPM for a fixed-pitch prop; Engine gauges in the green; Airspeed is alive; Centerline of the runway ('cause you've been looking down for a couple seconds, you should make sure you're not about to abscond with a runway light); Takeoff (rotation) speed will be achieved before a preselected abort point.