Nederlandse Modelbouw en Luchtvaartsite

Dutch Modelling and Aviation

In Memoriam

Klaas Willem Jonker
† April 30, 2018

On Monday 30 April 2018, Wilko Jonker died after a long illness at the age of 58. He leaves behind a wife and two children. The Dutch military aviation and plastic modeling were his hobby and on this website he shared all the knowledge he has collected over the years. His hobby has been able to distract him from the persistent disease in his body until the last week of his life. The contacts with other hobbyists were a major support for him.

This website will be maintained by different people for as long as possible, so that other enthusiasts can continue to benefit from extensive content.

Pilatus PC-7


The Pilatus PC-7 is based on the Pilatus P-3 and the first prototype, actually a P-3 of which the Lycoming engine was replaced by a P & W PT6A-20 turboprop, made its first flight in April 1966.
The program was seriously delayed by a crash and just in 1975 a second prototype, also a converted P-3, made its maiden flight.
There were all kinds of modifications, such as a new wing with integrated fuel tanks, a modified tail and a tear drop cockpit.

In August 1978 the first production exampled rolled out and by the end of the year, the type received its Swiss type certification.
Soon the delivery of the PC-7 to both civilian and military users followed.
The PC-7 Mk. II is actually a development of the PC-9, and adapted to the smaller of the turboprop PC-7. Goal was reducing the cost of operation and maintenance.


two seat basic trainer with one Pratt & Whitney PT6A-25A rated 410 kW
PC-7 Mk II:
a development for the SAAF, based on the airframe and avionics of the PC-9, the wing of the PC-7 and one& Pratt & Whitney PT6A-25C rated 522 kW. In fact it is a hybrid of the PC-7 and the PC-9.
an upgraded version, developed for the Swiss air force and equipped with a glass cockpit and new avionics.


Technical information
Length: 9,78 m Wingspan: 10,4 m
Height: 3,21 m Wing area: 16,3 m2
Empty weight: 1670 kg Max. start weight: 2700 kg
Max. speed: 500 km/hr Climbing speed: - m/min
Cruising speed: 412 km/hr    
Range: 1050 km Service ceiling: 10060 m
Engine type: One Pratt & Whitney PT-6A-25A rated 650 hp
Crew: One instructor plus one pupil
Armament: None