Objective

In this Project the objective is develop a circuit that can measure the compresor revolutions of the plane in function for undestrand how that work in the comercial and militar planes.

Introduction

In this semester our School Project is the development of one revolutions meter of plane compresor that in the time of the semesters it will be developmeted like parr in the subject of “Electronic Aircraft”.

The Project will be develop in singles periods, that consist in the acquisition of the material for the circuit, the develop of trhe circuit and the tests for this finally can be exposed.

The Tachometer Indicator is a RPM meter which represents on a dial, calibrated from 100 in 100 rpm. With larger marks every 500 r.p.m. This instrument feeds on its own system, ie it does not require current from the aircraft. In airplanes with fixed pitch propellers, this instrument provides the RPM number of the engine crankshaft and by extension, the propeller; In airplanes with variable pitch propeller, indicates the number of propeller RPM.

Some tachometers speedometer, are expressed in percentage, that the 100% represent the revolutions at the maximum of the motor, this speedometer can be the next: