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Miles M100 - Student

F. G. Miles Ltd 

The Miles M.100 Student was built as a lightweight trainer as a private venture by F.G. and George Miles with development started in 1953. Although not specifically a Miles product, it was promoted as a Royal Air Force trainer but failed to enter production.

F.G and and George Miles conceived the idea of a new low cost military jet trainer in 1953, when still working on conversion of the M.77 Sparrowjet.

In designing the M.100 the two brothers and their small team set out to produce an aircraft to do the same job as the Jet Provost for ab initio and flying instruction, but in a generally smaller design, to minimise acquisition and operatings costs. 

With its accent on economy, the M.100 was designed round a single Marboré IIA turbojet of only 880lb thrust for take-off, or little more than half the output of the initial Jet Provost's 1640lb Viper ASV.5.

With about half the take-off weight of the Jet Provost T.3, however, the Student was not too far off in its overall performance. Maximum level speeds were just under 300 mph and 330 mph, respectively.

It was May 14, 1957 that the prototype, wearing the B conditions marking G-35-4, made its first flight in hand of George Miles, its chief designer, at Shoreham.

An uneventful although comprehensive flight development programme over the next few months, motsly by F.G. Miles Ltd test pilot ex-Sqn Ldr Duncan McIntosh, necessited non significant changes, and allowed the Student's inclusion in the Farnborough programme in September 1957.

Dorsal intake evolution

One of the main design features was the NACA-type flush intake above the wing centre-section for the Marboré centrifugal turbojet (for wich Blackburn had a production licence).

This intake's location and shape minimised the possibilities of foreign object ingestion on the ground and in the air, at the expense of some loss in installed thrust. It certainly appeared to work well enough in most flight conditions.

However, to prevent overspill at high angles of attack,  fences had been added each side after the first flight, 



Span29.2 ft.8.90 m
Length30.9 ft.9.38 m
Height6.3 ft.1.90 m

Weights and loadings

Empty, equipped2300 lb.1043 kg
Weight loaded3100 lb.1406 kg
Max loaded3600 lb.1630 kg
Max.wing loading26 lb/sq.ft.127 kg/m²

Performances ( at 3100 lb)

Max speed at S/L290 mphmph467 km/h
Max speed at 20000 ft.302 mphmph486 km/h
Cruising speed at S/L254 mphmph409 km/h
Cruising speed at 20000 ft..268 mphmph431  km/h
Landing speed69 mphmph111 km/h
Rate of climb at S/L2050 ft./mnft./mn650 m/mn
Time to 10 000 ft5.7 mnmn 
Time to 20 000 ft14 mnmn 
Take-off distance (50 ft)1740 ft.ft.530 m
Landing distance (50 ft)1710 ft.ft.520 m 
Range476milesmiles767 km

Mark 2 Version

Early in 1964, the prototype Student was modified to the Mk. 2 version, incorporating a Marbore VI F turbojet giving 20 per cent greater thrust, interchangeable underwing pods for a variety of weapons, improved brakes and cockpit ventilation. In this guise, basic production price was £25,000. 

It was flight tested by George Miles on 22 April, 1964.


In 1985, the original 1957 prototype Miles Student two-seat trainer has been renamed the GM100 (G-MIOO) after its designer, George Miles. Miles sold the unique aircraft to Mike Woodley, chairman of Aces High. It has been granted a UK Permit to Fly, and has updated avionics and a new paint scheme.

Woodley, claims that the trainer's low stall speed, around 55kt, is unique in its class, as is its excellent grassrunway capability. Aces High operated 20 aircraft for film work and air shows. 

Few weeks later, on August 24, 1985, the GM100 crashed at Duxford.  The aircraft was being flown by company chief pilot Peter Hoare.

Following an aerobatic sortie accompanied by former Miles Aircraft test pilot Duncan Macintosh, Hoare took off for a solo flight but abandoned take-off and landed heavily, coming to rest on the airfield. The aircraft sustained damage to the nose, and one wing was torn off.

Conservation in Museum of Berkshire aviation

The jet trainer, had been restorored to static display by a team of volunteers.