Variometers & flight instruments: what you actually need
Instruments don’t make a pilot, but they make thermal flying, navigation and safety far easier. Here is what each tool does and how to build a sensible kit.
The variometer (vario)
A vario measures vertical speed and gives an audible beep when you climb, so you can centre a thermal without looking down. It also shows altitude.
- Dedicated varios: small, loud, long-lasting batteries and usually quick to read. Many include GPS.
- Phone apps: inexpensive and flexible, but battery life and screen visibility can be limiting. Use airplane mode and a good mount.
GPS and flight logging
GPS gives ground speed, track and position. Logs from your flights let you review thermalling and submit to online competitions and flight logs.
Radio
A handheld radio (VHF/UHF, subject to local regulations) allows communication with your instructor or group. Learn the channel plan and etiquette in your area.
Other useful items
- Airspace data: a map with up-to-date airspace is vital for cross-country.
- Windsock or anemometer for ground checks.
- Spare battery or power bank.
What to buy first
- A reliable vario, with an audio you can hear.
- A radio if you fly in a group or with a school.
- Later, GPS with airspace and navigation.
Setting up
Adjust the vario’s sensitivity and audio thresholds so you can hear small lift. Test the unit before every flight.