countto10

http://breakingdefense.com/2013/08/14/adm-winter-x-47-aborted-bush-carrier-landing-not-a-problem/

Great photos.

Russia Developing Attack Drone From T-50 Fighter Jet ? UAC | Defense | RIA Novosti http://en.rian.ru/military_news/20130826/182971084.html

They're obviously unhappy about being cut and are acting up.

MAKS 2013 Future Section

Cross dress Friday?

HiRes HiRes HiRes HiRes HiRes

So has anyone seen it yet?

So some people say it's Mach 1.8, some Mach 2.0 and some Mach 2.35. Can anyone with inside knowledge say what the latest 'official' claim is.

I'm thinking the acceleration phase would be outside the threat zone, so it wouldn't matter, a shockwave could probably be detected anyway. You could accelerate without AB but it would take much longer and probably consume more fuel too. The car example was a little exaggerated but it was the best I could think of. I thought the F-22 could achieve Mach 1.6 without AB anyway?

You can probably start a car in 3rd gear but you wouldn't because it isn't efficient. For the same reason, the extension in the time required to go from Mach 0.8 to 1.2 without AB makes it inefficient as regards both time and fuel, so it's a lose-lose. For the similar reasons, you wouldn't cruise between Mach 1.0 and 1.2.

You would pretty much always use AB through the sound barrier AFAIK because it actually reduces fuel consumption, which is why the Concorde always used it going through Mach 1.

You wouldn't cruise at Mach 1.2 because of the transonic drag regime.

To withstand firing guns.

Last I heard they were trying to cut off the Hawg's legs. What's the word on that? Is it still to be phased out?

It gets hot because the intake compression heats up the air dramatically as it slows to subsonic, then further heat is added by the compressor stages, then more heat needs to be added in the combustor to actually add work. That's why the HPT is always the most stressed part and metallurgists and engineers go to great length to produce super-alloys and blades with in-built air-cooling channels that create a protective boundary layer around the HPT blades. The blades are under immense stress from the spinning and the load imparted by the air giving up work to the turbine but ultimately it could handle the job quite easily at 20degC. You are however kind of right in that a larger compressor will cause less heating at high flow rates just as a larger turbo in a car is more efficient at high boost. More complex ramps will also help but the real break-through technology will be pre-cooling.