In aviation, in Australia, Canada, New Zealand, South Africa, the United Kingdom and elsewhere, HASELL or alternatively HASEL, is a standard mnemonic to prompt a series of checks prior to carrying out many types of manoeuvres, such as stalls, spins, spiral dives or aerobatics.
The HASEL acronym stands for:
HASELL is often abbreviated to HELL for any subsequent manoeuvres.
- Kaiser, John W.: How to Fly Book - Cessna 150, page 37. Victoria Flying Club, 1977.
- CAA NZ Flight Instructor Guide: Basic Stalling Retrieved 14 December 2011