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Great Britain's Phillip and Powis Miles Master and Martinet trainer

Photos

  • Miles Master trainer
  • Miles Master Mk I trainer
  • Miles Master Mk I trainer
  • Miles Master Mk II trainer
  • Miles Master Mk II trainer
  • Miles Master Mk III trainer
  • Miles Master Mk III trainer
  • Miles Master trainer
  • Miles Martinet TT Mk I trainer

Design

The Phillip and Powis Miles Kestrel first flew in 1937 but it was rejected by the British Air Ministry. The improved Phillip and Powis Miles Master had an order for 500 placed in 1938, which was the biggest order at the time for an Royal Air Force (RAF) trainer. The Master became the standard advanced trainer for the RAF during World War II.

The Master had a low wing and was made primarily from wood. The landing gear of the Master was retractable.

Prototype

The prototype for the Master I was first flown in late 1938.

The prototype for the Martinet was first flown on April 24, 1942.

Production

The Master Mk II first flew in November 1939. The Master Mk III first flew in 1940.

  • Master Mk I: 900
  • Master Mk II: 1,747, 1,799
  • Master Mk III: 602
  • Master total: 3,249, 3,301
    • Manufacturer: Phillip and Powis Miles Aircraft Ltd.
    • Production: 1939 - ?, ? - end of 1942
  • Martinet: 1,793
    • Production: ? - 1945
  • Queen Martinet: 69 (conversions and construction)

Variants

  • Phillip and Powis Miles Kestrel: Prototype. Had Rolls-Royce Kestrel engine.
  • Master Mk I: Production model. Entered service in May 1939.
  • Master Mk II: Supplies of the Kestrel ran out and the Bristol Mercury engine was selected. The wheels retracted backwards into the wing.
  • Master Mk III, Miles M-27 Master Mk III: Slightly smaller wing span. Could be used to train in bombing, gunnery, navigation, instrument flying, and high speed flying.
  • Martinet, Miles M-25 Martinet: Target tug based on the Master Mk II. Longer nose.
  • Queen Martinet: Pilotless target tug. Radio controlled. Developed in 1943.

Usage

Britain and South Africa used the Masters and Martinet.

Post World War II

The Master Mk II and Martinet did remain in service for a few years after World War II.

Specifications

  Phillip and Powis Miles Master
Type Advanced trainer
Crew 2
Wing 1: 0.303" MG
Practice bombs 8
  Phillip and Powis Miles Master Mk I
Crew 2
Engine (Type) 1: Rolls-Royce Kestrel XXX
Cylinders V 12
Cooling Liquid
HP 585, 715
Propeller blades 3
Dimensions  
Span 39'
11.89 m
Length 30' 5", 30' 8"
9.27 m
Height 10'
3.05 m
Weight  
Empty 4,370 lb
1,982 kg
Loaded 5,500 lb, 5,573 lb
2,528 kg
Performance  
Speed 250 mph
Speed @ 15,000' /
4,572 m
226 mph
364 kph
Climb 2,100'/minute
640 m/minute
Service ceiling 27,000'
8,230 m
Range 484 miles, 500 miles
779 km
  Phillip and Powis Miles Master Mk IA
Type Trainer
Crew 2
Engine (Type) Rolls-Royce Kestral XXX
Cylinders V 12
Cooling Liquid
HP 715
Dimensions  
Span 39'
Length 30' 5"
Height 10'
Weight  
Loaded 5,532 lb
Performance  
Speed @ 15,000' /
4,572 m
226 mph
Service ceiling 28,000'
Range 500 miles
Armament  
Wing 1: MG
  Phillip and Powis Miles Master Mk II, Miles M-19 Master Mk II
Type Advanced trainer, Glider Tug
Crew 2
Engine (Type) Bristol Mercury
Bristol Mercury XX
OR Bristol Mercury XXX
Cylinders Radial 9
Cooling Air
HP 820, 850, 870
Propeller blades 3
Dimensions  
Span 35' 9", 39'
10.9 m
Length 29' 6"
9 m
Height 9' 5"
2.86 m
Wing area 224 sq ft
20.8 sq m
Weight  
Empty 4,130 lb, 4,293 lb
1,875 kg, 1,947 kg
Loaded 5,300 lb, 5,312 lb, 5,573 lb
2,412 kg, 2,528 kg
Performance  
Speed 260 mph
Speed at Sea Level 240 mph
384 kph
Speed @ 5,000' /
1,525 m
260 mph
416 kph
Speed @ 6,000' /
1,829 m
242 mph
389 kph
Speed @ 10,000' /
3,050 m
255 mph
408 kph
Speed @ 15,000' /
4,575 m
245 mph
392 kph
Cruising Speed at 5,250'
1,600 m
230 mph
368 kph
Climb 2,120'/minute
646 m/minute
Service ceiling 25,100', 28,000'
7,650 m, 8,540 m
Range 393 miles
632 km
  Phillip and Powis Miles Master Mk III, Miles M-27 Master Mk III
Type Advanced trainer
Crew 2
Engine (Type) Pratt & Whitney Wasp Junior
Pratt & Whitney Twin Wasp Junior
1: Pratt & Whitney R-1535-SB4G Twin Wasp Junior
Cylinders Radial, Radial 14
Cooling Air
HP 450, 750, 825
Propeller blades 3
Dimensions  
Span 35' 7", 35' 9", 39'
10.85 m, 10.9 m
Length 30' 2"
9.19 m, 10.5 m
Height 9' 3"
2.82 m
Wing area 224 sq ft
20.8 sq m
Weight  
Empty 4,204 lb, 4,210 lb
1,907 kg, 1,911 kg
Loaded 5,400 lb, 5,573 lb
2,452 kg, 2,528 kg
Performance  
Speed at 2,000' /
610 m
214 mph
342.4 kph
Speed at 5,000' /
1,525 m
221 mph
353.6 kph
Speed at 9,000' /
2,745 m
231 mph
369.6 kph
Speed at 15,000' /
4,575 m
227 mph
363 kph
Speed at 20,000' /
6,100 m
218 mph
348.8 kph
Service ceiling 27,300'
8,350 m
  Phillip and Powis Miles Martinet, Miles M-25 Martinet
Type Target tug
Crew 2
Engine (Type) Bristol Mercury XX
OR Bristol Mercury XXX
Cylinders Radial 9
Cooling Air
HP 870
Propeller blades 3
Dimensions  
Span 39'
11.9 m
Length 30' 11"
9.45 m
Height 11' 7"
3.57 m
Wing area 238 sq ft
22.1 sq m
Weight  
Empty 4,600 lb, 4,640 lb
2,090 kg, 2,105 kg
Loaded 6,600 lb, 6,750 lb
3,000 kg, 3,062 kg
Performance  
Speed at Sea Level 232 mph
371 kph
Speed at 15,000' /
4,575 m
237 mph
379 kph
Cruising Speed at 4,500' /
1,370 m
225 mph
360 kph

Sources:

  1. Aircraft of WWII, Stewart Wilson, 1998
  2. World War II Airplanes Volume 1, Enzo Angelucci, Paolo Matricardi, 1976
  3. Aeronautics Aircraft Spotters' Handbook, Ensign L. C. Guthman, 1943
  4. Jane's Fighting Aircraft of World War II, 1989
20th Century American Military History Crucial Site