Simviation Forums

Whenever I climb in a jet as soon as I reach, say, 28,000ft I start to lose power and thus speed. I

what jet are you flying up there and how fast is your ascension rate? generally you want to be about 1800Ft/min between 0-25,000 and then 800-500Ft/min any higher.

Jets are not rockets. Take your time getting up.

Oh, also, it may seem dumb, but it once happened to me...
I couldn't maintain a proper flight at high altitudes, having to keep the throttle wide open to keep the plane from stalling at FL300... same as you...

Then I found out what the problem was... now, it may seem like the dumbest thing, but that's probably also the reason why I didn't see it...

my spoilers were open  :P

Cheers

[quote]Whenever I climb in a jet as soon as I reach, say, 28,000ft I start to lose power and thus speed. I

This is why it is so important to start at the bottom of the ladder.

I do not fly tubes in FSX but this is what I can say about the problem:

1) I would guess it safe to assume that your climbing rate would need adjustment at higher altitude.

Flying a small prop you will also find that your rate of climb need to be adjusted taking weather and load into consideration.

2) As Bill have mentioned. You speed indicator reflects 190 Knots but you are flying much faster then 190 knots.

In a small prop your speed is "true airspeed on the ground". As you climb higher the density of the air reduce, meaning the density of the air going into the pitot tube reduces, reflecting a "indicated Air Speed" as your "true Air Speed" will be faster.

This of-course making it hard for me to calculate the required rate of decent (Groundspeed/2 then adding a 0 to obtain appropriate decent in VFR) when I only have the indicated air speed.

I guess that would be the case with tubes too.

Goodluck with a smooth climb

[quote]Oh, also, it may seem dumb, but it once happened to me...
I couldn't maintain a proper flight at high altitudes, having to keep the throttle wide open to keep the plane from stalling at FL300... same as you...

Then I found out what the problem was... now, it may seem like the dumbest thing, but that's probably also the reason why I didn't see it...

my spoilers were open

depending on the tube and how it was made.. make SURE engine anti ice is enable above 10K

Ahh!! good point there with the IAS vs. TAS

I feel like I should go to the toilet and read more often...

Anyhow sometimes when viewing the aircraft from the outside I notice a considerable angle of attack while maintaining 190 kts. level flight.

But yes, I was climbing at 1,600fps rate of climb above 20,000ft.

Make sure the flaps are fully retracted as well.  I've had that happen before, leaving a notch of flaps in after takeoff.  One other thing is to stay ahead of the curve, don't let the plane decelerate to 190 at high altitiude.  The high angle of attack creates a lot of drag, which makes it hard to accelerate.  Flying the Eaglesoft Citation X taught me that, trying to take it to 50,000 ft.

Are you using FSinn weather ?

Are you using FSinn weather ?

No, all is default. Except for some aircraft and a few airports.