Gulfstream G700 Pearl 700 Engine Run On 100% SAF In Test The Pearl 700 is the new powerplant in development by Rolls Royce (RR) for the brand new Gulfstream flagship G700 jet. The Pearl 700 engine is a 18,250 lbs thrust engine which is being hailed as more efficient and powerful than the BR725 powerplant that currently powers the Gulfstream G650. The Pearl 700 also shows that it can consume Sustainable Aviation Fuel (SAF). The breakthrough here is that in a recent test the Pearl 700 engine utilized 100% SAF. Previous to this all engines that consumed SAF utilized blended SAF which with a mixture with conventional aviation fuel up to 50% ratio.