P&W R-985/2800; Flat Opposed General Rules; Radial Engine General Rules; Turbine Engines - Honeywell Vibrex 2000 User Manual

Chapter 4 - Installation
4.5.4
Mount the Velocimeter in the horizontal position on the crank
shaft thrust plate immediately behind the propeller, using a
slotted Velocimeter bracket (the nut cannot be removed). It is not
necessary to mount a check Velocimeter on radial engines.
4.5.5
Mount the Velocimeter as close to the plane of rotation of the
propeller as possible, 90° to the piston travel. Stay within 6 to 8
in. from the engine center line.
4.5.6
Mount the Velocimeter as close to the plane of rotation of the
propeller as possible and 90° to the travel of the master cylinder
(connected to the master rod).
4.5.7
TPE-331 -
the reduction gearbox. No survey Velocimeter is necessary.
PT-6A -
pad or the over-speed governor pad (whichever is most easily
accessible). Angle the pads slightly in at the top. This action
does not significantly affect the signal from the Velocimeter. The
Velocimeter may point up or down. No survey Velocimeter is
required.
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P&W R-985/2800

Flat Opposed General Rules

Radial Engine General Rules

Turbine Engines

Use a vertical mounting (up or down) on the face of
NOTE: Many TPE-331 applications have
manufacturer-specific mounting locations.
Mount the Velocimeter on the tachometer generator
13841 Rev A
84