First number is total impulse and second number is average impulse.
Please keep in mind that any motor with an average impulse over 80 is an HP motor, even if it is a G.
All skids are HP and no skids allowed at CMASS.
I visit these pages frequently contemplating fun future flights.
Recommend selecting several motors that could work for your flight. Jason carries many different motors, but does not have every single load with him.