the vario with speed compensation
A Must For Each Genuine Model Glider Pilot

Finally, full scale vario information from a model glider.

Unbelievable but true: In contrast to recent varios this vario is indicating really existing lift and sink only.
You may forget about times and frustration when after a few circles you found out that you were betrayed by „stick thermals" and you had to land within short.
If the vario is indicating lift then you can be sure that the modell is climbing regardless of stick action!!!
It is common knowledge: Height changes yield airspeed changes and vice versa and these are initiated continiously by up- and downwinds turns, gusts and turbulences at the perimeter of thermals. These effects together with stick movements cause height changes without thermal influence. They only suggest thermals and are therefore called „stick thermals". They can be denied by a nozzle which takes care for the „total energy compensation" ( TEK ).
This nozzle is a precission sensor which constitutes an optimized system together with the vario electronics.

Major system features:  The vario signal is fascinating in its definition:  It is continous from sink to lift information and the recegnition of beginning lift, which is most important in weak thermal conditions. There are no disturbing influences from pressure changes within the fuselage as the pressure is measured via the TEK-nozzle. Individual nozzles for V-,T- and conventional tails are available. Modular design:  Transmitter module with fixed and variable frequencies are available. ( Fig. 1a and 2 ) Vario module with integrated supply voltage test. ( Fig. 1A ) Plugged TEK-nozzle ( Fig. 1 ). Weight 2 grams, easily installed, also as retrofit! Fig.1   Fig.1

Advantages of modular design:

• Separation of vario- and RF-module via connectors for easy integration with future module developments.
• Small vario size: 50x38x13mm, extension for the tube plug: 22x22mm ( Fig. 1A ).
• Improved installation and flexible change over to other models.
• The new mini-vario ( 62x22x13mm ) is now available for further improved ease of installation in narrow fuselages. Fig. 3
• The RF-module can be placed for optimized antenna position.
• Cost savings: The vario remains in the modell whereas the RF-module is moved from one model to the other.
• The vario module can be used also together with transmitters on other frequencies like e.g. 869 Mhz or 2,4 Ghz.
• With this system you will find the way to lift areas easier and faster.
  You will optimize the potential of the initial height after hi-start, bungee or aerotow.
  You will experience a real performance improvement with longer and more efficient flying.
  Of course this vario can be used without TEK, but be assured that you will
  never ever fly again without TEK-nozzle.

For the ISM-band ( 433,075 Mhz to 434,775 MHZ ) the following two RF-transmitter modules are available ( Fig.2 and 1a )  A cost effective solution is the module with one permanently tuned frequency. There are 66 different frequencies to choose from and the size is 26x24x10mm. A relatively expensive module with 16 frequencies adjustable with a DIP-switch. Size: 36x27x11mm. To all owners of earlier Skymelody-Varios without speed compensation the manufacturner offers the option to separate the RF-module from the electronics at a small charge.  Fig. 2

Proven features remain:  Excellent range with very good transmission quality.  66 transmitter frequencies available. Easy installation with a 7 inch transmitter antenna. 4 ranges each for vario sensitivity and signal delay, easily and quick adjusted with a DIP-switch. Comfortable earphone with adjustable volume. Safety feature through RC-system voltage check. Small receiver to be carried easily in your shirt pocket.

New !!! Adapter for battery check New!!!

This new adapter allows you to check 5 cell batteries as well and it can remain in your „5-cell-model".

New !!!„ Skymelody - Mini - Vario with TEK "New !!!

Fig. 3 If you encounter space problems in your glider then the Mini-Vario is recommended. It combines the same functional features with smaller size at the same price. The PC-board measures 50x25x12 mm , weighs 18 gms and is sealed with shrinking tube and silicon. On the picture you recognise on the left the tubing to the TEK-sensor. On the right is the plug to the RC-receiver and the connector to the transmitter and in the middle the DIP-switch for the system parameters and the instruction label.Also you see the transmitter with 139 adjustable frequencies.

The receiving side uses LPD-transceivers Midland G7. Fig. 4 shows the G7. LPDs are very low power 10mW transceivers and they are useable by everybody without registration or fees.For more informations please click here: Fig. 4

Please refer to the articles in the RC-magazines AUFWIND 1/2000 and SCALE 6/1999.

Ing. Büro - Uwe Schulz - Am Brammer 30 - D 29640 - Schneverdingen
Tel./Fax:+49(0)5193/52667-52669
Email:info@tek-variometer.de