New RAAF Air-To-Air Refuelling Capability

On Tue, 01 Jul 2003 08:40:51 GMT, Guy Alcala
wrote:

JB wrote:

True enough, it does burn more fuel, but possibly not enough to be an issue.
Actually, in domestic ops, the RR is the most thirsty of the engines.

Some numbers:
767-200 PW
Fuel to climb to FL330 (at 155,000 kgs start weight) 3280 kg
Cruise at FL330
@ 155k, 5086 kgs/hr
@ 130k, 4510 kgs/hr
@ 110k, 3994 kgs/hr

767-300 GE
Fuel to climb to FL330 (at 155,000 kgs start weight) 3010 kg
Cruise at FL330
@ 155k, 4940 kgs/hr
@ 130k, 4476 kgs/hr
@ 110k, 3982 kgs/hr

The numbers are for a .79 cruise, and reduce by just on 400 kgs/hr (for
both) if you are holding.

The 767-300 has a bit less drag than the -200, so I would expect a GE
equipped 200 to be slightly worse than these figures. You can't use a 300,
as there will be tail clearance issues with the boom refuelling gear.

Do you happen to know why the -300s have less drag? Offhand I'd expect the
opposite, given the larger wetted area.
larger wetted area, but the aircraft is transonic and the longer
fuselage increase the 'fineness' or ratio of cross section to length,
which tends to reduce drag in the transonic and supersonic regimes.
Relatively few notice just how Long (and thin) Concorde actually is.
It is about 2 meters shorter than an a330-300!

"Dave Proctor" wrote in message
...
Whilst undoubtedly under the effects of alcohol, "BB"
wrote:

The 767-200 are showing signs of a fair bit of wear and tear.

Only recently though, and mainly in the cabin. For the first part of
their life they were used on international ops, thus they had a low
number of cycles whilst having high passenger utilisation.

lately though they have been used on the monorail, so their cycles
have gone up, along with their passenger usage. Given their imminenet
retirement, there has been no refurbishment.

Whilst the cabins look tired, as far as cycles go most of them are in
middle age - not young, but not close to retirement either.

=========

Dave

Don't Drink Drive....
It's A Laundry Detergent

Structurally as well... increasing amounts of corrosion and the like
being found... especially in cargo areas...

Regards,
BB.