Press T to display the console, then activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Display throttle - show throttle
Display speed in mach units - show mach
Display speed in air - show velocity
Display speed on ground - show groundspeed
Display fuel usage - show fuel
Display fuel usage as percentage - show fuel usage
Display altitude in feet - show altitude
Toggle Blackouts - blackout
Toggle Flameouts - flameout
Toggle Flatspins - flatspin
Display angle of attack - show aoa