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Pitot Tube

Pitot tube is the sender of data for barometric instruments and for many other devices.There is an option at these devices that pressure is converting to voltage through the computer.
The pitot tube at Gazelle SA-341,SA-342 will be explained here.
Pitot tube is placed just under the cabine and is is collecting P1 pressure which is consisting from mostly dynamic component and slightly from static.Static component is collecting from two holes placed under the gearbox and engine from both sides of the frame.

Pitot tube components are :
Pressure tube ( 2 ) rilsan,
adapter ( 1)
holder ( 3)
drainage (4 )
montage holder ( 7 )
adapter ( 8 )

Pitot tube with the heater
Heater is necessary device and it is preventing pitot tube from freezing at the same time it ensures good air flow during the cold temperatures.It has its own limitation for work.Each manufacturer has its own and it must be at the manual noted.

There is a complete scheme for connecting it 
At 7 alpha there is a detector and it is pitot warning light controller.During the freezing if the warning light is on and the switch is on,That  is a information for the pilot that he must pay attention at speedometer.


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There you see the fixed zero point ad device prior the testing.                                                                                                                                                                                                                                       From the both sides of torque indicator there are holes where you can adjust the tolerance at 0% and 100%.

In case of using older version of device there are some tolerances to be inputed so this is the nearly fair good readings of maximum torque at SA 342.
This is the reading at 50%
How to connect the cables to Gazelle instalation.

This is the device itself fairly packed after testing.

At this…

Gazelle SA-341 SA-342 workshop

Gazelle SA-342 in the process of manufacturing to be as good as new

The process of overhauling is at the stage where SA-342 gets new paint after the old one is removed completely.The new wiring is placed.That all guarantees long and safe flight hours.