Navman 5380 - Manual (Page 33)

TRACKER 5380 Installation and Operation Manual 33 NAVMAN
6 The TRACKER then asks you to set the
throttle to achieve a target RPM. For a twin
engine boat set both engines to about the
target RPM. When the engine RPMs are
correct, the Target RPM box will turn green.
Now, do not change the engine speed.
Wait for about 60 seconds for the boat to
stabilise, ensuring the Target RPM box stays
green. Then press
. Wait while the
TRACKER records the data.
7 The TRACKER repeats the above step to
record data up to the maximum RPM.
Then the TRACKER asks if you want to save
the curve. Select Yes. The TRACKER asks for
a name for the curve. Change the default
name if required, then press
. The
new curve is stored.
Note: To interrupt making the curve at any
time, press
.
10-3 Fuel consumption curves
A fuel consumption curve is a powerful tool for assessing your boat performance in different
conditions and for helping you to run at the most economical speed for the conditions. Fuel
consumption curves require engine RPM, which requires SmartCraft to be installed.
Making a fuel consumption curve requires
running the boat in a straight line through the
engine’s full RPM range for about 15 minutes.
For your first curve, choose a calm day with
light wind and little current; have a typical load
and a freshly cleaned hull. Then you can make
fuel consumption curves for different boat,
weather or sea conditions. Compare these
with your first curve to see how your boat’s
performance changes with conditions.
Making a curve
1 Start running the boat in a straight line.
2 Press one or more times until
the Setup menu is displayed, then select
Fuel.
3 Select Fuel consumption curve,
then select New.
4 Enter the comfortable maximum RPM you
have measured for the engine. Do not use
the maker’s maximum RPM.
5 The TRACKER then asks you to set the
minimum RPM. Set the throttle for
minimum RPM; for a twin engine boat set
both engines to about the same minimum
RPM.
Now, do not change the engine speed.
Wait for about 60 seconds for the boat to
stabilise, then press
. Wait while the
TRACKER records the data.
10-3-1 Making a fuel consumption curve