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.

Martin S


This type was a direct development of the Martin TT and equipped with another engine and ailerons in the upper wings.

It was a twoseat observation plane with a central float and smaller floats on the wingtips and under the tail. The straight wings were of equal span. It was striking that the fuselage was situated between the wings, supported by struts.

Length: 9,02 m (30 ft 4.5 in) Wingspan: 14,15 m (51 ft 4.5 in)
Height: - m Wing area: - m2
Empty weight: - kg Max. start weight: - kg
Max. speed: 118 km/hr Climbing speed: - m/min (3200 ft 10 min)
Cruising speed: - km/hr    
Range: 800 km ? Service ceiling: - m
Engine type: One Hall Scott A-5 rated 125 hp (60 hp Hall-Scott A-5-A)
Crew: One pilot plus one observer
Armament: None