Prier P1 no46 Larkhill
P-1 No 46 was the first of the Bristol Monoplanes to be designed by Pierre Prier.
British and Colonial Aeroplane Company had found initial success with the Farman-inspired Boxkite, of which some 78 aircraft were built. The company was less fortunate however, with their later designs.
The Racing Biplane, and the 1911 Monoplane were both unsuccessful, with the Type T only being built in small numbers. After this, the company turned to the monoplane, with successful designs being designed by Pierre Prier and Henri Coanda.
Pierre Prier joined the company in June 1911, from the Bleriot Company at Hendon, to take charge of tractor type monoplane design and development with Gordon England taking over biplane design.
Prier led the design of five types of monoplane, which were first flown between July 1911 and the end of 1912. The first two aircraft were the Bristol P-1 and the Bristol School Monoplane, both being single-seaters. Three Bristol P-1 and seven Bristol School Monoplanes were built, the first Bristol P-1 (build number 46) flying in July 1911.
Prier Dickson No98 School
Anzani-powered Prier-Dickson School Monoplane No 98 at Larkhill.
Of the two Bristol Prier P-1 aircraft, build numbers 56 and 57 were entered into the 1911 Circuit of Britain Race. However, they both failed to take part as Prier himself, crashed No 56 on the morning of the race whilst the other pilot (O.C. Morison), suffered an eye injury and was unfit to fly.
The Bristol Prier P-1, powered by a 50hp Gnome, had a slightly more complex undercarriage than the Bristol School Monoplane, which was powered by a 35hp three-cylinder Anzani radial engine. Both aircraft had all-moving tail surfaces, with no separate rudder or elevators.
The Bristol Prier P-1 (No 56) was subsequently re-engined with a 40 hp Isaacson engine for its owner James Valentine, specially for an entry in the second British Empire Michelin Cup Race.
The Bristol Prier P-1 and Bristol School Monoplanes were mainly used at the British & Colonial Flying School at Larkhill, although one (No 81) was later sold in Spain and two in Italy.
Prier short fuse ss School no 81
Single-seat Prier School Monoplane No 81 was sold to Spain in March 1912.
A two-seater version of the Bristol School Monoplane was then developed, in collaboration with Bertram Dickson and James Valentine, with the first aircraft being build number 58. A total of 11 examples of this version were built and proved to be very successful with and examples being exported to Spain, Italy (four aircraft) and Germany.
One example (build number 75) was also ordered by the Central Flying School and received RFC Serial number 256.
Prier Mono No73 two seat short
A short-fuselage two-seat Prier Monoplane No 73 in use at the Larkhill School.
Next came a 'lengthened' two-seater variant (the first example being build number 82) in which Bertram Dickson had a greater role. This aircraft is generally referred to as the Prier-Dickson monoplane and first flew in July 1912. After Prier left the company, a total of 10 aircraft were still built.
The Royal Flying Corps (RFC) machine (build number 75) was subsequently modified to this standard, receiving like the other Prier-Dickson monoplanes, a fixed tailplane and conventional elevators in place of the original all-moving design.
Prier-Dickson 75 monoplane 256
Prier-Dickson two seat monoplane No 75 (RFC 256) at Farnborough in March 1913.
The fuselage of the two-seater was lengthened by 2 feet 6 inches, the wingspan increased to 34 feet and power provided by a 70 hp Gnome rotary. One additional aircraft was delivered to the Royal Flying Corps (build number 91) receiving serial number 261. Examples were also exported to Germany, Turkey and Bulgaria.
The final development, the Prier-Coanda monoplane was completed by Henri Coanda. It was a side-by-side two-seat aircraft, of which three were built. Two of these were exported to Germany, with No 108 being retained for use by the Larkhill School, until it was written-off in July 1913.
Prier side-by-side two seat
One of the three side-by-side Prier monoplanes developed by Henri Coanda.
The total number of aircraft built in this family was 34 aircraft between July 1911 and December 1912. Most of these aircraft had very short lives and no examples have survived.


  Prier P-1 School Two Seat Short Prier-Dickson Prier-Coanda
Powerplant 50 hp Gnome 35 hp Anzani 50 hp Gnome 70 hp Gnome 50 hp Gnome
Span 30 ft 2 in 30 ft 2 in 32 ft 9 in 34 ft 0 in 35 ft 6 in
Maximum Weight 820 lb 780 lb 1,000 lb 1,080 lb 1,080 lb
Capacity  Pilot only Pilot only Two seat Two seat Two seat
Maximum Speed 68 mph 58 mph 65 mph 65 mph 65 mph


Variants and number built

Prier P-1                     Three, 50 hp Gnome, build numbers 46, 56, 57
School Monoplane Seven, 35 hp Anzani, build numbers 68, 81, 95-98, 102
Two Seat Short Eleven, 50 hp Gnome, build numbers 58, 71-76, 83, 84, 90, 94
Two Seat Long Ten, 70 hp Gnome, build numbers 82, 85-89, 91, 130, 155, 156
Prier-Coanda Three, side-by-side, 70 hp Gnome, build numbers 107, 108, 109
Total 34 aircraft in five variants





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