Ola Fremming's homepage


Drawings

Some of the drawings listed below are suitable for those who design their own models, and like to include vital parts in the drawings.  Others are of more specific items for modeling that each and everyone can make for themselves.  All the drawings are in DXF-format (DrawingExchangeFile), a format possible to import into most SW-packages.

Plane(s).

  • Spigas 3 : Basic aerobatic model for 40-50 size engine.
  • Spigas 5 : My last for a.60 size engine.
  • Spigas E : Basically a Spigas 90 made with a balsa fuselage, to make installation of electric motor and batteries easier.

 

Engines and exhaust

  • OS 140 RX : The 2-stroke for F3A
  • Webra 120R : The first available 'big' 2-stroke for F3A, the case is the same as the Webra 145R, and the rear exhaust Bully engines assembled in USA.
  • YS 120SF : The original YS 4-stroke, the newer 140's are almost exactly the same size.
  • OS 61RFP : The king from the 60-size 2-stroke era.
  • OS 46VF : Older rear exhaust OS.
  • Bolly EQ-60 : Super-light, very quiet pipe for 60 engines, still available.
  • Extra-muffler : Fremming design extra-muffler with very low resistance and excellent noise reducing. Works by canceling of opposite phase sound waves.

Radio equipment

Bits and pieces

All these drawings are made to be used by a SW made (by myself) to mill the pieces on a small CNC mill that we have at work.  The pieces will end up in correct size if a 1mm routing milling tool is moved along the lines.

When using MK's 'Dual BB coupler' on elevators, this piece made of fiberglass PCB (Printed Circuit Board) attached to the center unit of the coupler, enables the use of wire pull-pull from the servo to the coupler.  The use of wires avoids problems with temperature- trinduced trim changes etc.  DXF-drawing

 

Drawing of control-horn that can be made from fiberglass-PCB and glued in position.  Standard version.  DXF-drawing

 

 

Drawing of control-horn that can be made from fiberglass-PCB and glued in position.  Dual throw version suitable for rudder pull-pull. DXF-drawing

 

 

Drawing of control-horn that can be made from fiberglass-PCB and glued in position.  Special version with extra arm for counterbalance weight. Made for ailerons, to reduce engine-generated vibration leading to servo-pot wear.  DXF-drawing

 

 

Drawing of a servo-arm that is screwed onto a std. JR round wheel.  DXF-drawing

 

 

Drawing of a servo-arm that is screwed onto a std. JR round wheel.  DXF-drawing