Schübeler HST Series User manual

Manual For Schübeler HDT
And HST Ready To Plug
EDF Solutions
Manual for factory assembled and tested EDF
propulsion systems of the Schübeler HDT und HST series.
Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme

Safety Instructions (Please read carefully before first
use!)
Product Philosophy:
Your Schübeler Ready to Plug EDF system is a propulsion system for RC jet model aircraft which is optimized
in regard to all fan and motor components in our development department and on the field.
The EDF system is designed for the use in model aircraft only. Any other use is prohibited.
Run your EDF system only outdoors and installed inside a model or outdoors on a testbed with a crack
protection and a protection against suction of small parts or even your hand!
Never stay in front or alongside a running EDF system, never place your hand in front of a running EDF
system. Never stay in the jet stream of a running EDF system.
Before running your EDF system remove all loose parts like rags, screws, tools etc.
Never run or fly your EDF system if unusual vibrations occur. Check and eliminate the reason for the
vibrations before further use. Please contact us for help if you can not find an obvious reason.
Do not exceed the recommended limits of your EDF system. (See table 1)
Your Ready to Plug EDF system is sold as a functional unit for installation inside a test platform or a model
aircraft.
The user of the EDF system is responsible for installing the system according to our recommendations and
the applicable laws.
The user of the EDF system is responsible for a save use according to the laws in his country and according
to our recommendations.
Non observance of the above announced recommendations may cause severe injuries or damage.
The Ready to Plug EDF system is not a toy.
The HDT (high dynamic thrust) and HST (high static thrust) are made in Germany in our on production plant
in Paderborn.
They operate at highest efficiency and need therefore less power input for the same or a higher thrust
impulse compared to standard fans.
Schübeler propulsed jet models therefore reach a shorter take off and a higher top speed combined with
longer flying times. Furthermore Schübeler fan units are optimised for an efficient cooling of the electric
motor. The HDT fan series works with two separated airflows for a perfect cooling of the front and rear
motor part, the HST fans have a perfectly integrated motor which is cooled directly outside and inside.
The motors which we integrate in our Ready to Plug fan systems are carefully adapted and tested with our
fan units on the testbed and outside on the flying field. You can be assured that a motor which we combined
with our fan units works at its peak efficiency and at the highest power level.
Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme

Before we decide to use a potential motor inside one of our Ready to Plug fan systems we also check its
mechanical qualities very carefully. We only use motors with bearings free from any backlash and a made
with perfect workmanship. The Schübeler DSM motors have an exceptional position with their axially pre-
loaded fixed-bearing / floating bearing mounting.
Not only the adaption for highest efficiency but also the optimisation regarding perfect thermal properties is
part of our development work. On one hand we carefully test the thermal limits of the individual motor, on
the other hand we test each Ready to Plug system to give you reliable data how to avoid exceeding these
limits.
We not only tell you the series cell count, but also the maximum capacity and consequently the maximum
duration of a fan setup. Also regarding this point the Schübeler DSM motors are in the exceptional position
to be thermally very stable. The winding of the Schübeler DSM motors can withstand 220°C, the magnet
works up to 250°C and the composite parts inside the motor can withstand 180°C.
As controllers we use only proven products from companies with a good reputition. In addition to that we
test the controllers inflight and on our test bed. Therefore we can also give you the best settings.
As a dependable, lightweight and powerfull source of energy we would like to recommend our HDHE LIPO
batteries to you.
Please see all relevant parameters for installation and startup of your Ready to Plug fan system in table 1.
Table 1
Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme

The Perfect Airframe For Your Ready To Plug Fan
System:
An optimised fan system only works perfect if installed in a suitable airframe. Please consider this sentence
when choosing your jet model for your Schübeler Ready to Plug fan system.
Table 2
As suitable airframe we target to a jet model which is particularly suitable regarding its weight and its
intake and outlet areas.
Also the total size and consequently the drag coefficient needs to match to the fan system or to be more
accurate to the fan swept area.
Negatively expressed a too large and too heavy jet model with small intakes and outlet will not even be able
to take off from the ground. Should it be able to fly nevertheless, motor and controller might get damaged
due to too long full throttle passes at low speeds.
At this point we clearly need to say that we made advancements regarding bigger models with smaller
ductings with our HST fan units.
Our HST fans allow the propulsion of models which might be considered as too big before we lauched this
technology, e.g. turbine models with their typically narrower ductings. But please pay attention to the right
size of the model and of its intakes also when using the HST technology too get a satisfying flight
experience.
The opposite extreme is a small model with perfectly sized and shaped ductings. Such a model has due to
its small size a lower weight and due to efficient ductings a higher thrust. Be assured that such a well
adapted model will reach a very high performance. The only limit for decreasing the size of your airframe is
a high wing loading which results in too high landing speeds . Table 2 gives you an overview for all
parameters which are relevant for the choice of your airframe.
Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme

Installation Of Your Ready To Plug Fan System:
Generel :
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The open duct system which we developed in combination with our HST fans is perfectly suited for models
with too small intakes or for models from which you expect the shortest take off runs and 3D aerobatic
performance .
This kind of installation should not be mixed with the classic IC DF installation with cheater holes but works
like a turbine installation. The open duct system is perfect for the conversion of a light turbine airframe from
turbine to EDF and works perfectly with our HST fan units.
D.
ly we differentiate to ways of installing a fan unit
The closed duct and the open duct system Both systems have their advantages and disadvantages and
work more or less well with different types of airframes
The intake has the function to provide the fan unit with the RIGHT amount of air..
If you want to propulse a small, lightweigth and fast model with suitable intakes we recommend the closed
intake solution This intake will provide enough air for the fan also during take off and climb and will lead
nearly turbulence free air to the fan at high speed flight combination with our HDT fan units this kind of
installation will allow the highest flight speeds
The disadvantage of a closed duct is its low adaptability. During low speed phases the fan might get not
enough air, at high speed flight it might get too much, depending on the size of the intake Drawing one
explains the closed duct system
During take off the fan has the chance to get additional air for example through the gear doors. In general
further openings are not neccessary. rawing two shows this kind of installation
Drawing 1
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Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme

Drawing 2
Table 3
For both solutions the fan unit should take place slightly behind the CG of your model, the controller is
placed near the CG and the battery is used to adjust the CG and takes place slightly in front of the CG. In
addition to that the receiver battery can be used to fine tune the CG position.
We recommend the use of low resistance gold plugs for cable joints which need to be detachable.
Permanent joints need to be soldered. As wire gauge please use at least the wire gauge which your
controller has. Table 3 gives you an overview about our recomended sizes.
Wiring:
The fan unit is installed with the secure fan fix to 3mm plywood boards which are glued into the fuselage of
your model. These boards need to be reinforced with two half formers which are also glued into the
fuselage. When using the closed duct system please take care that the fan unit sits free of stresses on the
boards and inside the intake duct. The flanges of the secure fan fix need to sit coplanar on the plywood
boards. Take care not to put too much pressure on the vibrancy rubbers of the HST fans. Please see the
installation dimensions of your fan in the appendix.
Take care that your intake sits loose on the fan. Stresses resulting from a too tight fit might damage your fan
unit and even your motor.
The nozzle should have a flange in the size of the fan shrouds wall thickness and is shifted onto the fan. It
can be fixed with adhesive tape. When using the open duct system please fix the Schübeler intake lip with
silicone glue. Attention! If there is a chance that your fan unit can be damaged by loose gravel or small
stones, we recommend to block the gear door openings with wire gauze . Absorbed stones can damage your
fan and motor.
Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme

Placing And Adjusting The Controller:
Positioning The Batteries:
Your controller needs to be adjusted in the right way to be the perfect match for your motor. If not yet done
by us, please adjust your controller according to table 4 (values exemplary for YGE controller).
ce your controller in a position that allows the shortest wires In addition to that please take care to
place the controller near to the battery to keep these wires as short as possible Too long battery cables
might damage your controller Therefore we strongly recommend not to place your controller in the
streamlined fairing of the fan unit That place is always far away from the battery.
As mentioned above you can adjust your models CG within limits with the battery. We write “in limits” as the
battery cables should be as short as possible. The manual of the controller will give you further information
about the maximum length of the battery cables.
Table 4
Pla .
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Ideally the battery is divided in 2-3 smaller packs which are connected in series and also in parallel for large
fan drives. We recommend to support the packs on 3mm plywood boards and hold them in place with velcro
tape.
Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme

First Start-up:
After final installation of your Ready to Plug fan system you can start the unit for the first time. We
recommend to start the unit slowly and increase the rpm steadily while watching the intake system. Take
care that the closed duct system can withstand the vacuum forces and that no parts move or flutter at the
open duct system. To prevent any damages take care that all screws and wiring is fixed properly at the open
duct system.
We now recommend a short measurement to make sure that your Ready to Plug fan system works at perfect
ducting conditions The thrust decrase and the current increase shows you if your duct system is suitable
for your fan system Please compare your measured current with the maximum values from table 1 Do not
exceed the recommended max. current.
To measure the current we recommend a simple clamp amperemeter, for the thrust measurement you can
place the model vertically with its nose on a scale It is important that you also measure the battery voltage
with a voltmeter as a reference
Please consider that the current and thrust will be slightly lower at high airfields (more than 400m above sea
level)
Let us give you an important advise concerning temperature measurements at your motor Never run your
fan system in the ductings on the ground for a longer time (not longer than 30 s) to determine the motor
temperature. Due to much higher load at static conditions you might damage motor, controller and battery
We strongly recommend to fly your model and check the motor temperature after the first test flights After a
positive validation of motor current and temperature you can fly your Schüebeler Ready to Plug fan system
for years and hundreds of flights
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In case of a damage at your Schübeler fan system please contact us by phone or by email. We will check the
problem / damage and give you further information whether a change of the rotor unit or a repair in our
factory is neccessary.
We wish you pleasent flights with your Schübeler fan system.
Damages / Exchange Of The Rotor:
Composite - Detmolder Str. 32 - 33102 Paderborn - Germany
E-mail: [e-mail] - URL: www.schuebeler-composite.com
Tel.: [phone] - Fax: [phone]
Copyright 2010 Schübeler Modellsysteme