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hexagon screw, so that the propmechanism will not loosen itself through vibration. This is the state in 
which the ORBIS is delivered. 

 

Verify  the  fixing  of  the  prop  mechanism  by  trying  to  turn  the  prop  mechanism  while 

holding the 

motor crankcase.  

 

 
Graphic 1.15.1. Mounting of the prop mechanism 

 Pay attention to the warnings for the prop mechanism in chapter 3.

 

1.15.   Installation of a fuselage cover 

The cast that was made in section 1.5. is now adapted to the form below. Be aware that you have to 
be  able  to  extend  and  retract  the  ORBIS  to  find  the  right  position  and  form  for  the  cover.  The  front 
edge (1.16.1.-36 red line) of the cover depends on the form of the fuselage. If the fuselage is narrow 
the  cover  must  be  smaller.    Looking  from  the  side  the  backrim  of  the  cover  (1.16.1.-37)  may  not 
protrude the backside of the support arms. 
 

 

 
Graphic 1.16.1. Installation of a fuselage cover 

Consider  the  curvature  of  the  cover  since  the  figure  above  is  a  top  view.  Do  not  glue  the  cover 
immediately between the SLS support arms. Firstly attach the cover with adhesive tape and verify that 
the  cover  does  not  touch  the  fuselage  wall  or  the  levers  of  the  end  switches  while  the  SLS  is 
retracting.  
 

Summary of Contents for ORBIS 20''

Page 1: ...Installation and Operating Manual for the ORBIS 20 self launch system 2020 08 www dr martin thoma com rbis 20...

Page 2: ...1 14 Mounting of the prop mechanism 12 1 15 Installation of a fuselage cover 13 1 16 Installation of springs and a piece of wood on the left fuselage hatch 14 1 17 Installation of a wheel cover 14 2 W...

Page 3: ...BIS Do not forget that you are operating propeller blades with up to 3 600 Watts 3 Programming and Operating Instructions The programming of the Dirk Merbold Controller and the operating of the ORBIS...

Page 4: ...echanism 2 Tilt plate 3 Brushless Strecker motor 4 Full carbon SLS support arms 5 Fuselage cover 6 Aluminium support frame 7 Micro switches to control the extension and retraction 8 Energy chain 9 Bru...

Page 5: ...connector 8 on the Dirk Merbold controller 17 Micro switch for the retraction activation of the gear motor Connected via female connector 7 on the Dirk Merbold controller 18 Micro switch for the exte...

Page 6: ...s for the ORBIS 20 1 3 Determining the distance I The distance from the rear edge of the cockpit canopy to the front edge of the fuselage opening see graphic 1 2 1 distance I should be between 40 mm a...

Page 7: ...er 1 6 Cut out the fuselage hatches Mark the cut out for the two fuselage hatches with a pencil The hatches are divided along the centre of the fuselage Please keep in mind that the upper fuselage joi...

Page 8: ...2 22 Graphic 1 7 2 Attachment of spring steel wire Four brass tubes 2 0 mm 1 1 mm see graphic 1 7 3 23 with a length of 20 mm are mounted inside the fuselage with superglue It is recommended to attac...

Page 9: ...retracted position Attach with epoxy resin and fibre material the two metal hooks out of 1 5 mm spring steel wire on the fuselage hatches It is advisable to bend the lower end around to increase the a...

Page 10: ...e delivered M4 cylinder head screw is inserted and well attached with epoxy resin and fibre material Between the plywood support and the cylinder head a distance of 5 1 mm must remain see graphic 1 10...

Page 11: ...inded fuselage side see graphic 1 10 3 31 The M4 cylinder head screws see graphic 1 10 2 27 are also well attached with epoxy resin and fibre material Graphic 1 10 3 Cross section of the fuselage upsi...

Page 12: ...vation of the gear motor Connector 7 Connected to micro switch for the retraction activation of the gear motor Connector 8 Connected to safety micro switch for the possible activation of the brushless...

Page 13: ...have to be able to extend and retract the ORBIS to find the right position and form for the cover The front edge 1 16 1 36 red line of the cover depends on the form of the fuselage If the fuselage is...

Page 14: ...on the left fuselage hatch Attach the spring on the M2 screw and hook the spring into the hook on the fuselage hatch 1 17 1 36 Graphic 1 17 1 Installation of springs on the fuselage hatches and a pie...

Page 15: ...Page 15 Graphic 1 18 1 Positioning of the main wheel and installation of a wheel cover...

Page 16: ...forbidden Operate only with best physical and mental condition This is valid both for the operator and for its aides 2 2 Warnings and safety instructions General warnings The operation of a self launc...

Page 17: ...e these propellers which can be ordered on the website www dr martin thoma com Verify if the propellers are undamaged before each take off Even the slightest damages on the propellers can cause severe...

Page 18: ...n operating and maintenance instructions in connection with the model and the self launch system can not be supervised by Thoma Modelltechnik UG limited liability Therefore Thoma Modelltechnik UG limi...

Page 19: ...ode 2 A Speed Automatic On and tow release on on the Merbold Controller Operating Mode 2 B Speed Automatic Off and tow release on on the Merbold Controller 3 2 Programming of the radio transmitter For...

Page 20: ...rtant note for Jeti systems Please make the servo pulse length of the Jetisystem is set to 20ms A smaller or larger pulse length may results in malfunction of the Merbold controller The fail safe adju...

Page 21: ...es Acceleration 0 100 4s This value ensures a slow acceleration of the props and prevents damages on the props Don t change this value Brake mode HARD 70 100 0 5s This value warrants a deceleration of...

Page 22: ...in the fully extended position the manual throttle signal will get to the Jeti MEZON 135 Opto brushless controller In all other ORBIS positions the manual signal is capped and replaced by a zero motor...

Page 23: ...the menu or you save the parameters The values are always effective immediately with one exception the language change Deutsch English You will have to disconnect the programming module and reconnect...

Page 24: ...ly relevant by acceleration Don t go below 40 Init Controler Init Controler No Selection No Yes Back Tow Release Release Open Release max 100 Selection 0 to 100 Release Closed Release min 0 Selection...

Page 25: ...Page 25 CH2 Back Measure Pulses Measure Pulse CH1 XXXX s Measures the pulse on CH1 Measure Pulse CH2 XXXX s Measures the pulse on CH2 Back...

Page 26: ...turn the motor back and forth If the prop mechanism is loose tighten the hexagon screws see graphic 4 1 1 33 Are there any foreign objects in the fuselage Are all components fastened in the fuselage...

Page 27: ...er 3 1 the ORBIS will be conduct the following steps when the 3 way switch is operated 3 way switch Operating Mode 1 Tow release off Operating Mode 2 Tow release on Tow release closed ORBIS extracts a...

Page 28: ...imum is reached the motor will be braked fast The ORBIS will remain in this position with braked motor The Dirk Merbold controller can only be rested by turning off the power supply of the receiver an...

Page 29: ...must turn down the throttle signal manually to 100 zero power For safety reasons the manual throttle signal will remain capped while retracted Never leave or transport the model airplane with extende...

Page 30: ...r back and forth If the prop mechanism is loose tighten the hexagon screws see graphic 4 1 1 33 Be aware that the hexagon screws are secured by a secand hexagon screw which must be removed first Graph...

Page 31: ...s regulate carefully the throttle in the extended state via an additional servo tester on the Jeti MEZON controller Once a vibration occurs immediately reduce the throttle via the servo tester Now a s...

Page 32: ...stop 4 2 1 44 This tube should always stop 0 5 mm before the limit Otherwise the gear motor will be damaged If you want to adjust the limit stop 4 2 1 44 always fasten it in a position first that is h...

Page 33: ...anty The warranty comprises the free repair and or the replacement of such parts which exhibit proven productions or material defects during the guarantee period starting from the date of the purchase...

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