Propeller Selection Guide/Recommendations
12 ⁵¹/₆₄
Available accessories
Website:
www.
hackermotors.us
8 ⁵/₁₆
13 ²⁵/₃₂
9 ¹⁹/₆₄
20
Ground clearance
3 inches for
level grass runway
10 ²⁵/₃₂
•
Uncomplicated installation without sawing off the fuselage nose and thus
maintaining the original look and resale value
•
The special shaft adapter does not protrude through the nose of the
fuselage making it invisible from the outside
•
Aerodynamically negligible - small
prop adapter
, tight fitting propeller blade
s
• S
afety for pilot, helpers and audience
•
Can be attached and removed from the outside in seconds without tools
•
Removed propellers can be safely stowed away (e.g. in the fuselage or
jeans
pocket)
•
A tether can be clicked into the latching device to pull the model to the starting point
and back.
11 ⁴⁹/₆₄
16
11 ¹³/₁₆
8 ²⁵/₃₂
18
.
5
7 ⁵¹/₆₄
12 ¹/₆₄
12
9 ⁴⁹/₆₄
9 ⁵¹/₆₄
12 ⁶³/₆₄
23
Ground clearance
2 inches for
hard flat runway
15 ⁹/₃₂
10 ⁹/₃₂
11 ¹/₃₂
15
11 ¹⁷/₆₄
13 ⁵/₁₆
12 ³/₄
18
14 ¹⁹/₆₄
Inches
9 ¹⁹/₆₄
14
10 ²⁵/₃₂
10 ³/₄
•
the motor cannot accidentally start when the locking pin is inserted,
•
the locking pin with the propeller is fully engaged and the green ring is visible,
•
there are no people next to or in front of the propeller,
•
there are no objects nearby that could be sucked in,
•
the propeller cannot touch anything when unfolded, the fuselage or the model
i
s held
tight.
11 ⁴⁹/₆₄
FesEx Uni8 – The Quantum of Security
The innovative FesEx system for model gliders enables the propeller to be attached and
removed quickly and easily without tools - safety is a top priority!
This not only has the advantage that the model can be presented without a
propeller up
until
the last moment, material, pilot and helpers are also protected by this system. With this
detachable variant, there is no risk of injury from rotating blades during an engine test run.
The model, the drive and even the means of transport are protected, as there is no longer
any snagging, incorrect jacking up or scratching - simply release the propeller and everything
is safe
.
8 ²⁵/₃₂
Distance fuselage nose to ground [
in
] if
t
he model is
completely standing on the
landing gear
12 ¹/₄
12 ⁹/₁₆
Ground clearance
4 inches for
uneven grass
runway
14 ¹⁷/₃₂
21
.
5
9 ⁴⁹/₆₄
13 ³⁵/₆₄
•
Additional locking
pin
with
prop adapter
•
Spacer sleeve for 5mm shaft
•
Spacer sleeve for 6mm shaft
•
Tow
line with locking pin
• Prop ring set with 4 pcs.
• RFM propellers (available also in white)
13
10 ⁹/₃₂
10 ⁹/₃₂
Never set the model or fuselage down on the inserted FES pin to avoid damage!
See the table for recommended propeller diameters depending on the distance between the
nose of the fuselage and the ground (standing on the landing gear) and the condition of the
runway.
For smooth/level hard
surfaces
, a distance of
2 in.
between the tip of the propeller and the
ground is sufficient, for uneven s
urfaces
and grass strips we recommend a minimum of
3 in
.
17
11 ¹⁷/₆₄
Propeller
diameter
Flying with the FesEx system
Compared to gliders with retractable engines, ground launch with front-wheel drive is very
simple – provided the landing gear offers sufficient ground clearance. Regardless of whether
you use a
dolly launcher
or
with
retractable landing gear, the start can be carried out without
complicated control interventions.
Depending on the quality of the
runway
, the distance to the ground should be
2
" -
4
"
when the
propeller is folded out –
2
"
-
3
"
is usually sufficient for s
mooth
runways
or well-mowed lawns.
The model is rolled or carried to the starting position with the flight battery connected. Then a
short full throttle test can be carried out without the propeller. Just before take-off, attach the
propeller, check that it is correctly latched and carry out a short full-throttle test with the
propeller.
Start immediately with full throttle (program the ramp-up time 1-2 seconds on the controller or
transmitter) and – depending on the model and landing gear position – roll off with the elevator
slightly to fully pulled. If
necessary, correct the position and direction with aileron and rudder,
and only release the elevator after take-off until a flat climb is achieved.
Before starting the engine, always make sure that
The advantages summarized:
