Hacker FesEx Uni8 System User manual
D-84030 Ergolding
Schinderstrassl 32
Parts/not included
Parts/ Delivery ContentsFesEx Uni8 System
quick start Guide
Parts Description/ Delivery Contents
Installation aid (not shown)
E
Made in Germany
Screws for attaching the locking sleeves to the motor shaft
(flatten the motor shaft at this point!)
(green) mounting frame for the motor customized for the model - self buildHacker Motor GmbH
Ball pin with prop adapter 8mmLocking sleeve for mounting on the motor shaft
The FesEx Uni8 system
The FesEx Uni8 system consists of a locking sleeve with screws (for 8mm shaft), the ball
locking pin with prop adapter (blade spacing 31mm, 8mm blade mount), the bearing framewith
flanged ball bearing and the installation aid (stepped sleeve with 8mm inner diameter).
Optional accessories see below or in the online shop at
www.hackermotors.us.
Specification and accessories for the FesEx Uni8 system
The FesEx Uni8 system is designed for an output of up to 3.5 kW at speeds of up to 15,000
rpm. The maximum torque must not exceed 10Nm, whereby it should be noted that this also
applies to torque peaks such as those that occur when accelerating / braking or when in contact
with the ground.
The FesEx Uni8 system is designed for motors with an 8mm shaft diameter (tolerance 8g6);
spacer sleeves for 5mm and 6mm shafts are available as optional accessories. There are also
suitable prop elastics for the standard center piece (31mm) as accessories. Of course, all parts
are also available individually as spare parts.
If,after an incident, the system no longer engages 100% or is stiff, it shouldno longer be used
and must be sent to us for testing.
Installation of the FesEx Uni8 system
The FesEx system can be retrofitted to existing models or integrated into new builds. Due to
the construction, the fuselage remains intact and can be dismantled at any time – for example
if the model is sold. Since the motor is screwed on from the inside of the hull, no fastening
holes are necessary or visible from the outside.
The creation/ adaptation of the bearing frame (D) and motor frame (E) varies depending on the
model, motor and its shaft length and is left up to the customer. The frames must be adjusted
together with the supplied installation aid in order to obtain a smooth-running, correctly mounted
drive.
The locking sleeve is screwed to the motor shaft using the two screws. Please note the correct
position and tighten the screws well with a high-quality Allen wrench. It is recommended to grind
a bevel on the motor shaft and, if necessary, to apply an additional screw locking varnish. After
installing the motor with the mounted locking sleeve, push in the locking pin from the front and
check whether the pin fully in to place in all positions (turn 4x 90 degrees). A full snap can be
D (red) Bearing framedetected when the push button of the locking pin springs back completely into its original
position and the green marking ring is visible. The motor must be able to be turned easily by
hand without rubbing, both with and without a locking pin.
Now the motor can be connected to the controller and a first test run can take place without a
propeller. Program the controller according to the motor instructions, set the brake and
acceleration to medium or soft so that the locking mechanism is not unnecessarily stressed. It is
essential to follow the instructions of the motor and controller manufacturer for this.
The first test run takes place without an inserted propeller up to full throttle (briefly). If there are
no suspicious noises, insert the locking pinwithout the propellerand start a new test run. There
must be no grinding noises! Now,mount the propeller in the prop adapter. In order to achieve
safe folding, we recommend installing the optionally available prop elastics crosswise (see
original instructions.)Now you are ready for a test run under load.
Please only carry out test runs with the propeller outdoors. Also observe the safety instructions
in the motor manual.
Tips for pre-planning Fes drive
ABC*Select a landing gear that is as high as possible if ground launch is desired*Choose a wheel diameter that is as large as possible*Chassis position as far forward as possible*Choose the largest possible propeller (efficiency / noise)
Propeller Selection Guide/Recommendations
12 ⁵¹/₆₄
Available accessories
Website: www.hackermotors.us
8 ⁵/₁₆13 ²⁵/₃₂
9 ¹⁹/₆₄
20
Ground clearance
3 inches forlevel 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 blades• Safety 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 ¹³/₁₆8 ²⁵/₃₂
18.5
7 ⁵¹/₆₄12 ¹/₆₄12 9 ⁴⁹/₆₄
9 ⁵¹/₆₄12 ⁶³/₆₄
23
Ground clearance
2 inches forhard flat runway15 ⁹/₃₂
10 ⁹/₃₂11 ¹/₃₂
15 11 ¹⁷/₆₄13 ⁵/₁₆
12 ³/₄18 14 ¹⁹/₆₄
Inches9 ¹⁹/₆₄14 10 ²⁵/₃₂10 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 is 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 ²⁵/₃₂Distance fuselage nose to ground [in] if the model is
completely standing on the landing gear12 ¹/₄12 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
• Towline with locking pin
• Prop ring set with 4 pcs.• RFM propellers (available also in white)13 10 ⁹/₃₂10 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 surfacesand grass strips we recommend a minimum of 3 in.
17 11 ¹⁷/₆₄Propellerdiameter
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 withretractable 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 smooth 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:
