Nesis
— User’s Manual
7.5
Tachometer and Manifold Pressure Indicator
Figure 52:
The metric version of variometer used in Nesis.
It can be shown in feet per minute, metres per second or meters per minute, depending on
choice of units. See section 6.3 on page 36 for more details.
The indicator shows acceleration as well. The acceleration is shown in a numeric form in
term of Gs.
7.5
Tachometer and Manifold Pressure Indicator
A tachometer is an instrument that measures the rotation speed of a motor shaft. It displays
the revolutions per minute (RPM), hence its alternative name RPM indicator. A manifold
pressure is an effect of choked flow through a throttle in the intake manifold of an engine.
It is a measure of the amount of restriction of airflow through the engine, and hence of the
unused power capacity in the engine.
Both indicators are related to the power settings. Therefore, we combined them into one
single indicator, see figure 53. This allows the pilot to optimally set the throttle and the
propeller pitch.
Figure 53:
The combination of RPM and manifold pressure indicator.
The tachometer scale is fully configurable. Note that some engines do not specify green and
yellow range. Hence, such range is optional.
The optional green range defines the recommended range of RPM.
Version 2.0
56
©
Kanardia
2011
