757-200 Payload Model

[Scott]

I too am liking very much my new 757-200 Posky. On my first cross country flight KSFO to KMIA had total gear failure. That sure
increases the "pucker factor" of landing. Managed a successfull belly landing--my poor new plane. Boy did that cost a bundle to fix

One question though. I find that to maintain the under 10 kft altitude / 250 kts rule, I have to use speed brakes constantly during descent
until leveling off. Is this typical of the real aircraft?

[Fritz Bayerlein]

Not sure but I use the speedbrakes as well. But there is an alternative.


Drop your flaps one notch, about 1°, below 250kts, and you'll see it help you slow down a lot. When flying approaches by hand I drop the
flaps immediately one notch below 250kts. Doesn't add TOO much drag but helps control speed.

[Scott]

I will give it a try. Once I'm on the glide slope with flaps going down, speed management is good.
It's just the drop from 10k to approach altitude where I use brakes.

[Fritz Bayerlein]

Try reaching 10000ft a little sooner so you can reduce your descent rate in conjunction with one notch of flaps and see how that works.
Throttle is chopped for this, of course.

[olseric]

Best part about the 757 is the fact that you can climb out like a rocket and sustain that rate nicely up to about FL280.

[Jetflyer]

The best thing to do is start the descent with a fast descent rate (3000fpm) and let's say your cruising speed is 260kts then let the speed
slowly build up to about 300kts, then decrease the rate of descent and maintain that until 14,000ft. Then level slightly, idle thrust and
reduce speed to 250kts by about 10,000ft at about 8000ft and decelerating through 225kts deploy stage 1 of flaps. I often use spoilers
just to help me slow down through 250kts before 10,000ft.

Obivously all the boeing 757 jockeys here should use some authentic Boeing 757 panels and sounds....makes the experience even
better!

[pagir]

Jetflyer wrote:
The best thing to do is start the descent with a fast descent rate (3000fpm) and let's say your cruising speed is 260kts then let the speed
slowly build up to about 300kts, [...]

Don't thrust the speed given in knots when you are over the transition altitude (FL18) because the system isn't able to give an accurate
speed. It's why you should switch to mach speed at this point.
So when you start your descent, you are not building up your speed from 260 to 300 kts, you are only getting a more accurate result from
the knots system. The GPS will give the true speed in knots, though.

I was wondering why the plane was flying at a slowier speed when climbing. In fact, it is not really slowier.

I didn't know that before. I learned that in the last Computer Pilot (where you can find the FsPassengers review!!!

Pagir

[Jetflyer]

Well I use a descent speed of 300kts airspeed until I get lowerI was just simplifying it a bit because most people want to know how fast
they should be going at this stage and airspeed is easier to relate to. . it seems to work for me anyway. I'm talking about airspeed not true airspeed or groundspeed by the way, if you understand what I'm saying I mean that 300kts at something like 16000ft is equivalent to 250kts at 38,000ft I'm just saying try and maintain the same kind of groundspeed in the descent because it is easier to judge where you will be at a certain descent rate. In order to keep the same groundspeed you have to accelerate the airspeed as you get lower. That's what I meant.

Example: if I am trying to descend to a waypoint on my flightplan at a certain altitude I have to calculate the time it takes to reach it, which depends on the groundspeed, and then I need to select the correct descent rate so I meet it at the correct height. Increasing my airspeed to have a minimum change in groundspeed works for me when descending and guess what I've always intercepted waypoints at the exact correct atlitude using this formula so it works.



Post Edited ( 10-18-05 16:22 )

[Fritz Bayerlein]

I try to keep my descent speeds as high as possibly will minimizing the fuel flow for $$$ reasons.

[Jetflyer]

Thats what I do but if i want to make some big "cash" I fly my other plane which cruises at 43,000ft 575mph and uses 9800lbs/hr fuel to
top that off it can carry as much as 189,000lbs fuel and 328 passengers. Its currently the most efficient plane in the world.

[olseric]

Back to the descending...

If you're cruising at MACH .82, hold that until reaching 300 KIAS. Then, hold 300 KIAS.

[Jetflyer]

That's what I do....

but seriously you should think about getting the plane I fly. It makes sooo much money. It reaches 43,000ft in 15 minutes if its light! But descending that plane is a bit tricky because it goes far too fast if you try descending more than 2000fpm. But that's not always a problem because it can fly safely all the way up to Mach 0.89. Way to go.



Post Edited ( 10-19-05 13:37 )

[Fritz Bayerlein]

What plane is this?