Flying the 7 twice7,at weights under 150K,on cold winter nights, it is a total blast to see the IVSI maxed out at 6000fpm. The flip side of the coin is a runway limited ,max weight take-off out of Vegas in high summer, when she sags upwards more than climbs out,and you use a good 12,000 feet of a 14,000+ foot runway generating enough lift to rotate.