In 1959 marketing studies began for a 40-seat version of the Caravelle, called
"Baby-Caravelle" or "Micro-Caravelle", which should have been powered by two
RR RB.140 engines. As this engine type was abandoned, the RR RB.163 was
considered, but the project was cancelled later, just to be revived around
1961 as the "Caravelle Junior" with two Spey 2 engines. This was a larger
design for 72 passengers and would have been a direct competitor to the
BAC 111, not "political correct" during a time, when Sud Aviation had negotiations
to built components for the VC10 and Super VC10. As a result, the project was
cancelled. That's what John Wegg tells us in his book "Caravelle". He don't give
a drawing of the Junior Caravelle, but at least of the Bébé-Caravelle.