PMDG 777-200

[capt.arab 0]

Hi guys,,

 

I have been trying my best to figure out my issue since i have found this.

I flying now OEJN to KJFK 

Jeddah Saudi Arabia to New York 

Real time flying ours is 13Hrs 

On my sim it is 18 flying hours.

 

How could it be this far since i am using actual RTE of 5673 Nautical miles i found that with the converting ecuagen 5673÷303= 18.7Hrs

 

 

thnc

[thibodba57 462]

39 minutes ago, capt.arab said:

On my sim it is 18 flying hours.

 

How could it be this far since i am using actual RTE of 5673 Nautical miles i found that with the converting ecuagen 5673÷303= 18.7Hrs

 

Well It seems the number your using for your GS is way off.  Did you do the flight in 18 hours or is the simulator telling you its going to be 18 hours.  Because if its the sim reason its so far off is because the planned TAS is probably wrong.  A 777 will cruise TAS around 450-480 Kts (I'm unsure of the exact number).  Adjust this for wind and you have your ground speed.  So until your fighting a 180 kt head wind that 303 is way off the mark.

[Mike777 163]

57 minutes ago, capt.arab said:

How could it be this far since i am using actual RTE of 5673 Nautical miles i found that with the converting ecuagen 5673÷303= 18.7Hrs

 

Where did you get "303" from?

Mike

[capt.arab 0]

22 minutes ago, Mike777 said:

 

Where did you get "303" from?

Mike

Flight speed 

[capt.arab 0]

 

37 minutes ago, thibodba57 said:

Well It seems the number your using for your GS is way off.  Did you do the flight in 18 hours or is the simulator telling you its going to be 18 hours.  Because if its the sim reason its so far off is because the planned TAS is probably wrong.  A 777 will cruise TAS around 450-480 Kts (I'm unsure of the exact number).  Adjust this for wind and you have your ground speed.  So until your fighting a 180 kt head wind that 303 is way off the mark.

I calculated the total nautical miles devided by airspeed. 

 

Head wind 234/ 56

at gs 481 

[Mike777 163]

I think you are confusing "Indicated Airspeed (IAS)" with "True Airspeed (TAS)".  The IAS shows on the left of the PFD and will decrease as you climb, but the TAS and the Ground Speed (GS) are indicated on the Navigation Display upper left corner.

Mike

 

[thibodba57 462]

Mike has it right.  Ground speed is the result of adjusting True Airspeed for the affects of wind.  Indicated Airspeed is affected by the air mass outside the aircraft and therefore decreases in altitude thus is not a source for navigation.

[Hoang 108]

Which speed did you take for the calculation? There were several topics about the time was off but all of them were because of calculation from IAS (from the PFD). 777 has much higher GS than that unless you have ~150kts or more headwind.
Hoang Le

[ukplane1 37]

Is this a joke?

[ErichB 3,638]

I can never understand why people want to jump into complex airliners if they have absolutely no idea about the basics of the theory of flight.

[vc10man 732]

8 minutes ago, ErichB said:

I can never understand why people want to jump into complex airliners if they have absolutely no idea about the basics of the theory of flight.

+++1

[swiesma 625]

When you divide 5673 NM by 0.84 you get  6753.... minutes or hours or days, don't know.... which is even more :-)

 

What you are interest in is like all others said: Groundspeed. Then you will get the right flight duration.

[fluffyflops 1,846]

That there is todays Saudia 21 flight.  Its been filed as 12 hours and 16 mins.  Using a cruise speed across the pond on track C at Mach 84 .  

  The Saudi's have got plenty of petro dollars.  So crank the speed up to m.84.  And remember dont  open the bars until you reach egypt 57 minutes into the flight.

(FPL-SVA021-IS
-B77W/H-SDE2E3FGHIJ4J5M1RWXYZ/HD1
-OEJN0430
-N0516F280 MIGD1N MIGDA L677 RIDEP/N0513F300 L677 CVO A16 RASDA UM855 KFK UL619 MAKOL L619 BUKEL/N0494F320 L619 KARIL DCT KENIN DCT LENOV L619 DENKO L996 VAVUN M602 BINKA DCT SONAL M602 ROBUS L983 GOMOT/N0497F340 L983 MADAD P58 FINDO DCT GOMUP/M084F340 NATC HOIST/N0489F340 N602A COVAN DCT ALB DCT IGN IGN1
-KJFK1216 KEWR
-PBN/A1B1C1D1O1 NAV/RNP1 RNP2 RNP5 RNP10 RNVD1E2A1 DAT/SV DOF/170727 REG/HZAK38 EET/HECC0057 LCCC0146 LTAA0206 LTBB0228 LBSR0249 LRBB0307 LHCC0340 LZBB0345 EPWW0353 EDUU0441 EKDK0451 EGPX0525 EGGX0631 020W0713 CZQX0750 040W0826 050W0904 ADIZ0918 CZQX0934 HOIST0936 CZUL1021 KZBW1129 KZNY1202 SEL/EFAB ORGN/OEJNZPZA PER/D RALT/EINN CYYR RMK/TCAS EQUIPPED)

where your getting 18 hours from I dont know.

[thibodba57 462]

Wow guys be nice.  While you guys might not have any idea why some people jump directly into a jet with understanding the fundamentals. I don't understand why people feel the need to jump down people's throats and mock them rather than teach them.  If your not planning on being constructive just move on please.  Aviation sim groups are some of the most hostile groups on he net.  This just proves it.  Aviation is very complex and takes YEARS to learn.  Not a single one of you knew the difference between IAS and TAS at the beginning either.

[swiesma 625]

35 minutes ago, thibodba57 said:

Wow guys be nice.  While you guys might not have any idea why some people jump directly into a jet with understanding the fundamentals. I don't understand why people feel the need to jump down people's throats and mock them rather than teach them.  If your not planning on being constructive just move on please.  Aviation sim groups are some of the most hostile groups on he net.  This just proves it.  Aviation is very complex and takes YEARS to learn.  Not a single one of you knew the difference between IAS and TAS at the beginning either.

This is not about aviation details - this is about absolut basics. Just saying :-)

And people here clearly laid out the difference between IAS / GS etc. Just a little bit of research would have done the trick.

 

But you are right,sometimes people in here are a little bit impolite. But so is asking questions which can be answered by 1 minute googling and 3 minutes reading...