Hi,
do not test it but I think it's the same gauge as the Etendard IV.
1/ connect to the shuttle
2/ Apply full power
3/ press the brakes
And a couple of second after that, you'll be catapult with a correct catapult endspeed.
I apologies in advance if it's not the right way, but it's work lije this with the Etendard IV.
Ost