What Is a "Fully Stalled" takeoff? Reading this article (on the Boeing 737 MAX saga; irrelevant), I found the following excerpt:


  Boeing ultimately accepted Davies recommendation and, we understand,
  halted production of the 707 for 10-11 months, whilst a new fin was
  designed and installed.  All existing 707s were then retrospectively
  modified.  A ventral fin was also installed on some variants to
  prevent ‘fully stalled take-offs’ which the Comet was also susceptible
  to.


I tried to search, but I found nothing on "fully stalled take-offs", whether about the Comet or any other aircraft.

So, what is a "fully-stalled take-off"? Are some aerodynamic designs (or aircraft models) more susceptible to it?
A &quot;fully-stalled take-off&quot; is an attempted takeoff where the elevator has too much authority. This can cause the aircraft to rotate to an excessive nose up attitude, which can exceed the stall angle of attack, before takeoff speed is attained.
Ventral fins were added to some B707s to improve yaw control, and prevent over-rotation. Over rotation which could lead to a &quot;full stall at takeoff&quot;.
https://en.wikipedia.org/wiki/Boeing_707

The British Air Registration Board refused to give the aircraft a certificate of airworthiness, citing insufficient yaw control, excessive rudder forces, and the ability to over-rotate on takeoff, stalling the wing on the ground (a fault of the de Havilland Comet 1). Boeing responded by adding 40 inches to the vertical stabilizer, applying full instead of partial rudder boost, and fitting an underfin to prevent over-rotation.