Jeff Kaufman's Writing

Rolling Commercial Jetliners

2026-01-29 · 13:00 UTC ·1 min read

Brief

Rolling commercial jetliners explores how a barrel roll can be executed in revenue service as a '1g' maneuver—minimizing airframe stress and keeping apparent gravity near 1g—citing Tex Johnston's unauthorized roll of a Boeing 707 prototype. The author argues modern fly-by-wire aircraft could be reprogrammed to allow such maneuvers, but certification and software-validation costs currently deter manufacturers; greater automation in testing could change that.

Why it matters

A barrel roll can be performed in revenue-service commercial airliners as a '1g' maneuver that keeps apparent gravity near 1g and always pulling passengers into their seats; passengers with window shades down might not notice.

Key details

  • Tex Johnston famously executed an unauthorized 1g barrel roll in a Boeing 707 prototype; modern airliners could be programmed to perform the maneuver but manufacturers avoid it due to the high cost of ensuring code correctness and regulatory validation, which might fall if testing/validation becomes more automated.
Source evidence

title: Rolling Commercial Jetliners
contenttype: article
publication: Jeff Kaufman's Writing
published: 2026-01-29T13:00:00+00:00
sourceurl: https://www.jefftk.com/p/rolling-commercial-jetliners

word_count: 234

Very few people have been on a plane performing a barrel roll, but we
could fix this. Commercial aircraft could roll in revenue service,
and if you had your window shade down you wouldn't even notice it. While there are many ways to roll an airplane that would cause
complete havoc inside the cabin, a barrel roll can be performed as a
"1g" maneuver. With careful control of the aircraft, the forces can
be balanced so that you only ever feel close to 1g of apparent
gravity, and it always is pulling you down into your seat. This was famously completed by Tex
Johnston , without authorization, in a prototype Boeing
707 . As acrobatic maneuvers go it's very safe, because the
stresses on the airframe are minimal. We could update the programming
on any modern airliner to allow the pilot to trigger a barrel roll,
and it could smoothly move the plane through the whole process. A major reason we wouldn't do that today is it's not worth it for the
manufacturer: it would be a lot of work to ensure the code was
completely correct. I wonder if as programming, validation, and
evaluation continue to get more automated the cost of adding this and
getting it through regulatory approval would get low enough that we
might see some airlines use this in marketing? Comment via: facebook , lesswrong , mastodon , bluesky