The trick with the high weight to lift ratio's is speed and power management. The MIG in the picture below even after a 9 - 10 minute flight still is above the 60oz per square foot level. There are very few turbine powered Jet models that are in the 40oz ratio's. Exactly why the higher level of experiance is necessary to fly Jet model aircraft more than one time without distroying them.
Lee H. DeMary
AMA 36099