Have I got the biggest?

[Biggles of 266]

How about this one?
15 ft 6 ins
Rolls Royce Condor
Hawker Horsley or Fairy Freemantle, or possibly R100 Airship
Found in the loft of a cinema being pulled down in Sutton in about 1985.
Guy
I've added the picture on top of the car, to give an impression of scale!

[Biggles of 266]

Here are a couple more pictures.
Boss markings and Pictures of a Hawker Horsley.
What an aeroplane!
Guy

[Dbahnson]

Very nice!

[cman]

Wow! that is a huge prop.