Sample Installations
Vibrex 2000 and Vibrex 2000 Plus User Guide 59
4.5 Sample Installations
This section gives a brief explanation of several Vibrex 2000 and
Vibrex 2000 Plus installations on selected aircraft and some general types
of aircraft. Use these summaries as guidelines for the user’s own
installation operations.
4.5.1 Lycoming O/IO-320/360
There is a 1/4-20 threaded boss on the forward left-hand side of the
engine crank case, which is ideal for mounting. Often the Velocimeter can
be mounted without removing any cowling. The photocell can be
collocated with the Velocimeter on many installations.
Alternately, the forward-most backbone case half bolt may be used to
mount the Velocimeter. In both installations, orient the Velocimeter with
its vertical connector pointing up.
4.5.2 Lycoming O/IO-540
Occasionally these engines have a front-mounted propeller governor that
offers good access and is a good place to mount. The forward-most case
half bolt is always an option. On some of the up-draft installations, there
are free threaded bosses near the starter.
4.5.3 Continental O/IO-470/520/550
Use the forward-most backbone bolt, if it is accessible. Otherwise, use a
forward oil cooler mounting bolt. Use the bolt closest to the crank shaft.
Some engines have a seal plate at the crank shaft front seal with exposed
studs. These seals are close to the spinner and clearance may be tight, but
it is a usable balance location.
4.5.4 P&W R-985/2800
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.
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