1920 

2 seater trainer.

In the USA the designation was TW-4.

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1922 

2-seater trainer with instructor and student side by side.

In use by the LVA, Aviation Department.

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1922 

Ambulance plane.

Modified version of the S.II for patient transport.

This S.II variant got X-pillars and a Curtiss X-5 of 90 hp.

Here too, instructor and student sit next to each other.

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The fuselage of an S.II and the wings of an S.III.

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1923 

2 seater trainer.

Used by the Naval Aviation Service.

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1924 

2 seater trainer.

At LVA, Aviation Department in use.

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S.IX/1 from 1937.

2-zits aereobatic/trainer 

In use at LVA in the Netherlands.

S.IX/2 from 1938.

2-zits aereobatic/trainer. 

Used at LVA in the Netherlands.

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1947 

2-seater trainer

350 built, also built under license in Italy and Brazil.

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1949 

2 seater trainer.

Nose wheel version of the S.11, no production in the Netherlands.

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1950 

Navigation trainer, there was room in the cabin for 7 people.

One built, no production.

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S.14/1 from 1951.

2 seater trainer.

The world's first design for a dedicated fighter-jet trainer.

S.14/2 from 1953.

2 seater trainer.

Experimental version of the S.14/1 with Rolls Royce Nene engine.