Thread: How to calculate time during Slew Mode in FSX?

1. Junior Member
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Dec 2011
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How to calculate time during Slew Mode in FSX?

Hi, Guys!

Suppose I'm going to Australia from Dubai. After flying 1 hour of Aircraft, I turn ON slew mode and reach near Australia in seconds. After that I turn off slew and start normal flying. After landing I'm watching that Clock on Aircraft didn't count Slew Mode time. So how I can calculate the slew time so that I can find exact flight time.

Regards,

2. Originally Posted by Happpy
So how I can calculate the slew time so that I can find exact flight time.
For what purpose, I wonder?
I you want to do mainly take-offs, SIDs, STARs and landings, choose shorter routes.
If it's for bragging, fly the routes real time or check an airlines' RW time table.

Wim

3. Junior Member
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Originally Posted by f16jockey_2
For what purpose, I wonder?
I you want to do mainly take-offs, SIDs, STARs and landings, choose shorter routes.
If it's for bragging, fly the routes real time or check an airlines' RW time table.

Wim
Just for varying speed and different Altitudes.
I mean:
1st time, I'll go at 525Knots and 32000ft & see how much time it will take?
2nd time, I'll go at 300knots and 40000ft and then again will see how much time it has taken.

Can you please tell me how can i do this?

4. Senior Member
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Hi Happpy,

You can change the sim rate using an entry in one of the menus or by useing the following key combination:

R followed by +/= to increase or _/- to decrease

Note the following regarding use:

1. Press R once and then press the required key - for example pressing R then +/= twice will increase the sim rate to X4 (i.e. four times the default (realtime) speed). You only need to press R once to be able to immediately change the rate during the flight UNLESS you press another key (other than +/= or _/-) then you will have to press R again (e.g you change the rate early in the flight and then change the view from VC to outside view you will need to press R again to change the sim rate)

2. You can increase the rate to X2, X\$, X8 or X16. You can, if you wish slow the rate to below realtime to 1/2 (half speed).

3. The current sim rate is displayed in the top right hand corner but note that it only displays the faster or slower speed and not the default speed when selected (i.e. if you increase the rate it will display X2, X4 and so on. When you decrease the speed it will display X4, X2, no speed rate shown (ie at default) and then 1/2).

4. At higher sim rates the scenery will blur. If you go above X4, when you decrease the rate the sim will play 'catchup' and automatically 'reload' textures files for your current position so you will get a loading bar like you do when first load the flight.

5. Above X4 all AI is disabled. As with the scenery it will be reloaded as at 4. above but you may notice a lack of traffic for several minutes once the reload has taken place.
Last edited by longbreak754; 11-26-2015 at 11:15 AM.

5. Junior Member
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Dec 2011
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Originally Posted by longbreak754
Hi Happpy,

You can change the sim rate using an entry in one of the menus or by useing the following key combination:

R followed by +/= to increase or _/- to decrease

Note the following regarding use:

1. Press R once and then press the required key - for example pressing R then +/= twice will increase the sim rate to X4 (i.e. four times the default (realtime) speed). You only need to press R once to be able to immediately change the rate during the flight UNLESS you press another key (other than +/= or _/-) then you will have to press R again (e.g you change the rate early in the flight and then change the view from VC to outside view you will need to press R again to change the sim rate)

2. You can increase the rate to X2, X\$, X8 or X16. You can, if you wish slow the rate to below realtime to 1/2 (half speed).

3. The current sim rate is displayed in the top right hand corner but note that it only displays the faster or slower speed and not the default speed when selected (i.e. if you increase the rate it will display X2, X4 and so on. When you decrease the speed it will display X4, X2, no speed rate shown (ie at default) and then 1/2).

4. At higher sim rates the scenery will blur. If you go above X4, when you decrease the rate the sim will play 'catchup' and automatically 'reload' textures files for your current position so you will get a loading bar like you do when first load the flight.

5. Above X4 all AI is disabled. As with the scenery it will be reloaded as at 4. above but you may notice a lack of traffic for several minutes once the reload has taken place.
Thanks for reply Brian! I've done this trick already. I want 64X or more speed.

When I knew I cannot increase it up to 64X then I decided Slew mode. But unfortunately slew mode doesn't count time.

6. Senior Member
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In that case, I don't think that what you are after is something you are going to be able to find out by using the sim. There maybe flight planning addons/utilities out there that can be manipulated to give you an estimate but I suggest searching the web for a realworld flight planning aid or mathematical based calculation tool.
Last edited by longbreak754; 11-27-2015 at 11:37 AM.

7. Top Gun
Join Date
Feb 2011
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8,246
There may be an option, but I'm not sure how to make it work regarding different speeds.

The flight planner, enter a plan, and it will give you the waypoints.
Then stay in the flight planner, and click on "Nav-log".
It will give you a list of all waypoints. Including times to the waypoints.
At the top of the log it lists total time, fuel burn etc.

Problem is, I don't know what speed it assumes for cruise speed.
If you create the plan with a ultralight selected you will get very different resulting times then with a 737 selected.
But what speed it's based on... no idea.

The aircraft.cfg file does have a cruise_speed= parameter. so maybe it's as simple as that.

You could test this easily.
select aircraft,
make flightplan,
write the time to destination on a scrap of paper.

Then:
Change the aircraft.cfg file "cruise_speed=" parameter. Increase the speed there.
start fsxc again,
MAKE the same flightplan. (don't be lazy and load the old one!!),
check if the time to destination is less now.

If this works, no flying is required.

8. Originally Posted by Happpy
Just for varying speed and different Altitudes.
I mean:
1st time, I'll go at 525Knots and 32000ft & see how much time it will take?
2nd time, I'll go at 300knots and 40000ft and then again will see how much time it has taken.

Can you please tell me how can i do this?
IMO any decent FMS/FMC gives a rather correct ETA for a given FL once you've stablized after TOC. You'll have to go payware for this I'm afraid.

Or you can go maths/physics: for a given fixed cruise Mach number (eg. 0.78) calculate IAS for different FLs, then try to calculate TAS and corresponding G/S. All very hypothetic, as one has to make temperature/weather assumptions.

I'd fly the route a couple of times...

Wim
Last edited by f16jockey_2; 11-27-2015 at 12:10 PM.

9. Senior Member
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Originally Posted by il88pp
There may be an option, but I'm not sure how to make it work regarding different speeds...................................
I considered and (partially) tried this method before I made my replay at post #6.

As well as the issues you raised I noticed that making changes to the cruise altitude field made no difference to the timings. Had a quick look at a number of aircraft.cfg files and none seem to have a parameter to change cruising alt

10. U
Originally Posted by f16jockey_2
IMO any decent FMS/FMC gives a rather correct ETA for a given FL once you've stablized after TOC. You'll have to go payware for this I'm afraid
Wim
Greetings All,

I would heartily recommend Plan-G for this mental exercise. Once you've loaded your flight plan, you can change altitudes and cruising speeds at will and compare the results. You can also program the wind conditions expected en-route. Plan-G works very well for me AND it is free-ware. (Though the author does have a donate box somewhere on the page... Here is the link http://www.tasoftware.co.uk

Respectfully,
Brian
Last edited by krasen; 11-27-2015 at 12:33 PM. Reason: Correct an iPad auto-correct error

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