Project Tupolev Team :: View topic

WalterLeo · ÊÂÑ

Tried to fly exercise 1 at Cancun international (MMUN) rwy 12, nowind.

To 76,6 to Cax=29,9 % LW ca 1 to less
Tu 154M

Have to train to use the altimeters in m!

Best regards

Walter

Bell · ÊÂÑ

Hi Walter, glad to see you here...

First, I'll answer your questions from the topic above..

WalterLeo · ÊÂÑ

Thanks Bell!

I am using M model cause I never got well the installation of the B2. Yes that trust available is enourmous at least at the low weight. Therefore it went away in altitude and speed. Ãðóñòü

The americans would call it a "hot rod".
But besides that, I presume, that the use of AP and AT in this exercise is not intended.
Íåò

Fine but for a westerner as I: would be possible to use 2000 ft instead of 600 m as altitude? If you were trained with feet and knots the instrument scan in feet is more natural, the needle of the altimeter at 2000 is straight up.

WalterLeo · ÊÂÑ

My second try this time with the B2. TO 84 to Cax 30%, LW 83 To (overweight I know!) The LM for the B2 doesnt work for me at the moment!

Best greetings

Walter

Bell · ÊÂÑ

Walter,

If you have some problems with B2, let's learn on M. Or fix all the problems with B2 and continue learning with it. As I said above, B2 is more prefferable for initial learning, but it should work well in msfs. Finally, which model do you prefer?

Re feet altimeter, let the circuit height will be 2000 feet, no problem.

WalterLeo · ÊÂÑ

Thanks for the prompt answer!

If you dont mind look at both flights please, on the B2 it was my first flight ever. But lets try on the M in the future, cause I feel much more comfortable with its systems already. (Dont have to look into the manual for starting up!)

Thanks

Walter

Õîðîøî

Bell · ÊÂÑ

No, I'll look the file for M in this case since these models have operating differencies and we can't mix them.

Bell · ÊÂÑ

Ok, let's start with M.

Try to set TOW at 80 tons and CG about 27% MAC next time for best perfomance.

Vr was 258 km/h which is higher than it shoud be. see Vr and V2 in the table below.

Gear up at 5-10 meters. You done it at 28 meters that is too high.

Take off on Tu is much complecated than landing. That's why I propose you to split learning on several stages, and we will move to another stage upon good experience with previuos stage, as we usually do with Russian students. These stages are:
- rotate + climb until 200 meters
- crosswing turn + climb to 600 meters + horizontal flight
- base turn + final turn + FAF
- descent on glide slope + landing.

Therefore, to achive good experience with stage 1, after rotate, next time, try to accelerate up to V2+40 km/h until height of 60 meters keeping pitch about 9-10*. At 60-70 meters reduce pitch accelerating up to 330-340 km/h until height of 120 meters and maintain with vertical speed about 2-3 mps at heights from 120 to 170 meters.

After you reach 330-340 km/h and 120 meters which is obligatory condition for beginning of flaps retraction, set flaps leveler from 28 to 15. Keep vertical speed at 2-3 mps. After IAS reaches about 380 km/h (it happens at 170-180 meters ot about) set flaps leveler to 0 and accelerate to 410 km/h until 0* flaps increasing pitch to prevent extra acceleration above 450 km/h.

This is the target you should achieve in the next flight. No need turn at 200 meters this time, just go straight ahead and pay attention to the first stage only, i.e. rotate speed, rotate itself, gear up, initial climb as I described.

-------

In addition...

1. Before flight you should set ABSU (ÑÀÓ system) properly for manual piloting. Both buttons on PU-46 should show "yokes" but not "ÎÒÊË"... Read pages 140-141 in English manual.

2. Start trimming with MET at the moment of rotate. And in horizontal flight try to keep alitude by MET only, without yoke movement. Target is to keep horizontal alitude at 2000'+/-30 feet.

3. For future reference - gears and flaps 28* extended on final before FAF, flaps 45* during descend on glide slope.

WalterLeo · ÊÂÑ

Bell

I presume, 2000 ft QFE, Tu-154M without winglets, is this right?
Should I freeze after stage one the simulator and switch off the Flight Data Recorder or should I fly till landing?
FAF= DME 12,2 LOC intercept?

addition:
ad 1) This time I used the flightdirector switched on the ILS, I didnt see differing indictions for pitch and bank (only the yoke). And FD worked nicely on final.
ad 2) I presume the rotation itself is done with the yoke and afterwards trim forward, if not pitch up exceeds 10 deg? (T-Tail effect?)

Happy weekend!

Walter

Bell · ÊÂÑ

WalterLeo · ÊÂÑ

Bell

Tried this time to see, when the yokes disappear and OTKP appears: I moved the controls before T.O. all around and the low hydraulic pressure warning sounds: Then the yokes disappear OTKP appears (in white) and all AP lights are off. Recycling the CAY switch all returns to normal. Same happend while turning final, as I moved the ailerons to the stop. Sorry did not make a screenshot, will do it the next time.

Bell · ÊÂÑ

Some problem with hydraulics I think. I don't think you move joystik too sharply which could lead (only in msfs) to fall of the pressure in hydraulic system. Screenshot of F/E panel will be useful.

PS. I'll try to look at your file tomorrow. Need to work a little tonight, and ice hockey Russia vs. Czech Rep coming up in several hours. Óëûáêà

WalterLeo · ÊÂÑ

Bell

Bell · ÊÂÑ

Have looked at the file...

1. If you perform several flights set MET to the neutral position before take off each time. Item "Òðèììèðîâàíèå" in the checklist and the highlighted lights on the picture below have to be checked before take off.
2. Nominal regime for the engines is 93,5% RPM. Try to set it more precisely.
3. Below is the picture I made for the vertical profiles you have to get (red line with tips) and you done in this flight (blue line).

Try to use short tips to get the IAS and height I set on the picture.

Do not start flaps retraction from 28* to 15* if IAS is less than 330 km/h and height is lower than 120 meters!

Vr and rotate itself were perfect in your flight.Flaps from 15 to 0 retracted very good. MET usage on this stage also good. Õîðîøî

PS. Something wrong with stabilizer. It has some jitter. Did you switch off the joystick in msfs and uses joystick control panel? This probably could influence hydraulic pressure loss as you described above.

Ap0pHiS · ÊÂÑ

Hello Bell,

On your diagram, you show we have to reduce pitch to increase speed from V2+40 to 330 at 60m. But I thought we should maintain V2+40 until passing 120m?

Thank you for your explanations!