gutshotdraw
ZERT Wilson CQB User
- Joined
- May 6, 2005
- Posts
- 3,226
The numbers Gulfstream talks about now are 7000nm at M.85 and 6000 at M.90. Both of those should be achievable or even exceeded with a little effort. However, I'm a bit skeptical about 5000nm at M.92. This plane has a preverbal wall between .90 and .91. Even if it is possible, 1000nm is already a huge range penalty for .02 mach.
We cruise the G650 at M.90 almost everywhere we go. We used to cruise the Global at M.85 all the time. If you need to really stretch the range, it's .85 in the 650 and .83-.82 in the Global. We are doing the G650ER mod not because we'll ever fly 7500nm, but because we should be able to go 6400nm at M.90.
All good info. The 650 ER mod presents an interesting conundrum that I can't answer. Will the increase in Max TOGW to 104K lbs. exclude you from Teterboro? Or will the airplane be "grandfathered" via the originally certified weight being under 100K? I'm also told there is room in the wing for even MORE fuel but they are still analyzing the structural consequences.
And meanwhile, now that you have flown both for a while, what are your thoughts on reliability, handling, and performance of the 650 vs. the Global?