The 'Excelsior' device.

[klem]

Developed in 1954 at the Royal Naval Air Station No.802 Squadron , Lossiemouth, Scotland for high-speed target practice. The 'Excelsior' banner (target) streaming device was especially for use on Hawker Sea Hawk FGA Mk.4 aircraft.

 

[VishnuOsiris]

NGL I clicked thinking there was a Transwarp Drive prototype.

 

[publiusr]

Or sawdust packaging materials...

 

[SeaslugMk2]

Or a flying tank.

SRJ