RE: Welcome to Club SAITO !
Not looking for economy in Duration (AKA vertical drag racing) you have only 30 seconds to get as high as you can before attempting a flight of 7 minutes (in te preliminaries, 5 rounds) in the finals (fly off) the flight has to be longer so the higher you get under power the better. In Texaco it is all about fuel economy to get good height for a 10 minute flight followed by the finals where the longest flight wins. This minimal nitro (10%) for Texaco, plus big prop minimal revs,and 40% + for Duration and a prop change to get max power.
All good stuff