The phrase "air firing" is correct and usable in written English.
It can be used in contexts related to testing or operating equipment, particularly in industries like manufacturing or aerospace.
Example: "The engineers conducted an air firing test to ensure the system's functionality before the final launch."
Alternatives: "air test" or "air discharge".
The soldiers waved automatic rifles in the air, firing in celebration.
It was found that, although heat extraction, air preheat, excess air, firing rate, dilution, and fuel type all affect global NOx emissions, they do not control NOx scaling.
Yonhap news agency reports that the South Korean military reacted while Pyongyang's missile was still in the air, firing two Hyunmoo-2 missiles close to the South-North border.
At an intersection up the road, a man wearing a red head scarf and belt cinched around a long white shirt waved a Kalashnikov rifle in the air, firing aimlessly to force cars to clear a path for the large orange truck he was trying to maneuver through a knot of afternoon traffic.
The vantage point of a shooter thirty-two storins in the air, firing an automatic weapon at a crowd on the ground, meant that the attack in Las Vegas would generate horrific numbers of injuries the gunfire amplified by the likelihood of people being trampled as they fled.
No major differences in the gypsum quality have been observed between air firing and Oxyfuel conditions.
Also dense microstructure established in air fired TiO2 containing samples.
The chauffeur, after firing two shots in the air, fired on his assailants.
Flame characteristics under such combustion conditions are expected to be different from those in normal air fired combustion processes.
Preposterous allegations by @MailOnline regarding UK plane 'avoiding Egyptian missile' in August are completely inaccurate 1/3 Incident involved GROUND-TO-GROUND fire exercise in military base few km off Sharm airport, no ground-to-air firing involved whatsoever 2/3 Egypt & UK govs fully aware that plane was in no danger.
Airliners previously informed of military exercise & instructed of procedures 3/3 In a series of tweets, he said: "Preposterous allegations by @MailOnline regarding UK plane 'avoiding Egyptian missile' in August are completely inaccurate… incident involved ground-to-ground fire exercise in military base few km off Sharm airport, no ground-to-air firing involved whatsoever.
