User Manual
TEMPERATURE
Please DON'T
use
optical tachometer with fluorescent lighting which
will give false readings, such
as
3000
or
3600
rpm.
The optical
RPM
sensor will function over
a
large range
of
propeller
sizes,
RPM and
lighting conditions.
It has
even able
to
measure 40mm
diameter model boat props spinning
in the air.
Experiment with different
sensor positions.
In
some cases, best results
may be
achieved
by
testing
in the
shade. With
the
motor running, move
the
optical sensor
to about
10-20 cm
from
the
propellers, taking
all due
care. Small
propellers
may
require closer positioning.
The
number
of
propeller
blades should also
be set.
Wrong setting will affect
RPM
readings
for
the optical tachometer.
For
example, fitting
a
three bladed propellers,
but leaving
the
i-Meter
blade figure
at 2
would cause
the
optical
tachometer
to
read
50%
high.
TEMPERATURE
There
is a
temperature sensor available,
so you can
monitor
the
temperature
of
battery, motor, electronic speed controller,
etc.
When
no sensor
is
connected, display will indicate 0.0°C
and
32°F
• Connect temperature probe
to
Mega Meter
• Press 'MODE'
to
select "TEMPERATURE"
• Press "ENTER"
to
confirm selection
Cc
Current
Temperature
Celsius
TEMPERATURE
Current
Current
Temperature
Fahrenheit
89
F
Peak
1 22F
Peak Value
Celsius
:
Peak Value
Fahrenheit
THRUST CALCULATOR
m
RUST
CALCULATOR
The thrust calculator
can
estimate
the
thrust
of an
airplane, there
are
many variances
and
some known factors.
Lets assume
we
have
an
airplane
and
this
is its
first flight.
We
know
the
size
of the
propeller
and we can do a
static full throttle
rpm
check with
a
tachometer
on the
ground.
We can now add
these known figures into
Thrust Calculator.
By the
fact that
you can
verify thrust
it
becomes
possible,
to
estimate
the
general power
of the
airplane
in
advance.
This will give
you
more knowledge about your plane
and the
power
characteristics
to
make your first flight less challenging
and
safe, after
all
you may
have other flight characteristics
to
deal
with.
This should
help
you to
estimate flight take
off
distances, recovery from
a
stall.
For
more experienced pilots this will enable them
to
calculate
if the
plane
is
going
to be
able
to
hover.
It can
show
you
what changes
to the
power
calculation will
be
affected
by a
different size propeller.
Propeller
Length (inch);
THRUST CALC
^propeller's
Effectiveness;
[Coefficient
j
Propeller
Revolution
j
RPM
(Revolutions
Per
Minute)
j
'D
i
oneter
C F
:
Blades:
RPM
:
Thrust:
0
10.00
1
.00
2
'
110
0 0
Number
of Blades
1
.
3
.
E
5 3
K
9
H
2
H
L b
CF (Propeller's Effectiveness Coefficient Table)
Manufacturer
CF
Standard propeller
1.00
APC propeller
1.06
APC
SF
1.50
APC
W
propeller
1.09
MenzS propeller
1.03
Bambula propeller
1.02
Bolly clubman 1.04
Cox
1.10
GWS
HD
0.75
GWS
RS (SF)
1.10
Smart
1.02
Zinger Wood
1.00
15