You are absolutely correct, by the letter of the law, but I suspect it is a bit unrealistic to think that anyone will start pursuing a copyright claim for books that are the best part of 50 years old. But post after post of images from the same source is not exactly best practice.I wonder how many more extracts from Aubrey Jackson's book will be posted before his literary executors and/or the publisher start complaining about breach of copyright? Twenty one extracts have so far been posted. One or two extracts might be acceptable. But the way this thread is going, it looks likely that ultimately we are going to see the entire contents of Appendix A of all three volumes copied and posted here!
From British Civil Aircraft since 1919,
here is a Hinkler Ibis.
Originally the Desford was conceived by the well-known instrument manufacturer company Reid & Sigrist as a two-seat intermediate/advanced trainer. First flown in Jul. 1945, by the time this technically successful design took the air, sadly, the Royal Air Force had lost interest in the concept; well, war was almost over anyway. The prototype soon found a new career drastically modified as prone-pilot research aircraft. Under the very appropriate designation R.S.4 Bobsleigh it was employed by the RAE Farnborough. Not happy with that, this tiny survivor entered later the civilian register modified again; this time as a photographic aircraft.
No-nonsense publicity poster. They could be really proud of their offspring.
From British Civil Aircraft since 1919,
The Pickering-Pearson KP.2.
May I provide an alternative ending to the life of the Snark. According to https://aviation-safety.net/wikibase/203762, the Snark was destroyed, by German bombing on 15 August 1940. On this date Croydon Airport was attacked in the first major air raid on the London area. At around 6.20 pm, 22 Bf 110 and Bf 109 fighter-bombers of Erpr. Gr. 210 mounted a final raid of the day, intended for RAF Kenley nearby, but attacked Croydon (four miles further north) in error. The armoury was destroyed, the civilian airport terminal building was badly damaged, and a hangar was damaged by cannon fire and blast. Another hangar (containing the Snark) and about forty training aircraft in it went up in flames.The Snark survived until about 1947, stored in the open at Burton Garage, Chippenham, Wiltshire. The Ladybird may survive today. It is said to have been stored in a barn in the Peterborough area since the outbreak of the last war. However there has been no report of it for decades but nor has there been any of its demise. Thus the story may be apocryphal.
Norman de Bruyne is perhaps more famous today for his glues than his aeroplanes!
From Aeroplane monthly 1978,
here is a small Info about T.K.3 Project.
T.K.6 :single seat racer monoplane,was developed from earlier T.K.2.