Thousands of people have backed a campaign wanting to ground plans to triple the controlled airspace around RAF Brize Norton and Oxford Airport.
The joint proposals deem the current arrangement unfit for purpose, and aim to boost safety and improve coordination between the RAF base and Kidlington airport.
But critics have blasted the plans, unveiled in February, as the biggest airspace grab in the South West for a generation.
A petition launched last month by the Free Flying Community of the UK has exceeded the 3,000 mark.
A statement on the page reads: “These proposals constitute an enormous threat to the free flying community.
“It is the largest single airspace grab in the SW of England in a generation, and which we consider to be completely disproportionate to the requirements of the airports involved.
“If approved they will seriously impact your ability to fly freely and safely.”
RAF Brize Norton, the Force’s largest base, wants to revise its airspace by altering its direction and usage. It is the first such change in at least 40 years.
But campaigners, including members of the flying community, have hit back in their fight to halt the plans.
Andrew Collier said “there is no need for this” while another, Neil Lagden, said he “supports free flying”.
Private pilot George Haye added: “I strongly disagree with this proposal as it clearly does not consider the safety of general light aviation users and is a heavy-handed, ill thought out, officious attempt to restrict airspace use without any proper justification.”
The British Gliding Association described both the consultation and its proposals as ‘flawed’.
Speaking in February, senior air traffic control officer Sqn Ldr Simon Hawker justified the proposals.
He said: “[Plans] will provide aircraft with additional protection against the risk of mid air collision.
“Longer term it will enable aircraft to fly more direct routes, reducing their carbon footprint for a positive effect on the environment.”
RAF documents said aircraft are sometimes “vulnerable at critical stages of flight” due to the ‘unfit’ arrangements currently in place.
The consultation closed on April 5.
Visit tinyurl.com/yacwg2pm to view the petition.