The SIPA S.1100 was a French twin engine observation and ground support aircraft flown in 1958.

In 1958 France was in the middle of the Algerian War and felt a need for a counter-insurgency aircraft capable of observation, photography and ground support.

This official programme led to three aircraft: the SIPA S.1100, the Sud Aviation SE.116 Voltigeur[1][2] and, slightly later the Dassault Spirale.

[1][2] Its crew compartment was in the extreme nose of a deepened forward fuselage, with multiple transparencies to provide good sideways and downward vision.

[1] Less than three months later, Ponthus and his colleague André Bouthonnet were killed and the aircraft destroyed when it crashed at Villacoublay during a low level demonstration.