The display is constantly updated and can be mounted wherever you
Display installation see Photo 1
The display can be installed anywhere on your helicopter, but its best to keep it
away from heat, vibration and exhaust. On the Raptor 30/50 series we find that pilots like
to have it fitted on the gyro platform, looking towards the tail rotor. A bracket with
sticky pads is provided for this type of installation.
The plug on the longer cable should be connected to a spare socket on the receiver. Use
an extension lead or a Y lead if your receiver is too far away or if you
dont have a spare socket.
The socket on the short cable should be connected to the plug on the sensor cable.
Again, you can use an extension if necessary. Please check that the cables are secure and
away from heat or oil.
Sensor installation see Photo 2
The sensor is provided with a 90º adjustable bracket for easy fitting to the Thunder
Tiger Raptor 30/50 series, it can be fitted to other helicopters but extra parts may be
On the Raptors the bracket fixes with the M3 bolt provided to the spare hole above the
fuel tank on the exhaust side.
The sensor needs to see the white reflective area on the piece of strip metal provided.
Remove the M3 nyloc nut on the bottom end of the mainshaft and re-fit it over the metal
strip, then adjust the strip with gentle bending so that as the mainshaft rotates, the
sensor is 0.5-1mm from the reflector.
When the receiver is switched on the display indicates ic for a few
seconds, then blanks before displaying 0 rpm. As you prepare to take off into
a hover, the display indicates _ up to 500 rpm, then 5 for 500
rpm, 10 for 1000 rpm, up to 19 for 1900 rpm.
Above 1900 rpm two dashes are displayed to show excessive rotor speed.