CLUE --
While the ?????? looked fast, it made a top speed of just 192 mph, and in the President's Cup races of 1923 and 1924 that was not fast enough. But the plane did make a contribution toward building the ?????? aircraft industry, and ??????? is still in business to this day as an independent company - something that cannot be said of Supermarine, Curtiss or deHavilland.

After an awful lot of googling I think it's the Letov ?-8.

Well done it is indeed.
LINK -- http://www.internetmodeler.com/1999/september/first-looks/s8.htm

Crew: 1
Length: 8.3 m (27 ft 3 in)
Wingspan: 11.4 m (37 ft 5 in)
Height: 2.62 m (8 ft 7 in)
Wing area: 16.5 m2 (178 sq ft)
Empty weight: 1,030 kg (2,271 lb)
Max takeoff weight: 1,230 kg (2,712 lb)
Powerplant: 1 ? Napier Lion piston aero-engine, 340 kW (450 hp)

Performance

Maximum speed: 360 km/h (224 mph; 194 kn)
Cruising speed: 330 km/h (205 mph; 178 kn)
Range: 400 km (249 mi; 216 nmi)
Service ceiling: 7,000 m (22,966 ft)


And the prize of course

This weeks headache

Have fun ?

Ah ha, I know this one! It's the observer's station in the de Havilland Sea Vixen.

Well done Harry it is.
LINK-- http://www.thunder-and-lightnings.co.uk/seavixen/history.php
And the prize of course.

This weeks headache ??

Have fun.

CLUE -- "The first flight of the ?????????? took place on 19th May 1954 with deliveries commencing in 1955?"

Clue - Many of these elegant aircraft still survive today and are becoming popular with warbird enthusiasts as the market for more exotic types dries up.??

Last Clue Bill Lear