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Munro View Drop Down
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Posts: 268 		Post Options Post Options   Quote Munro Quote  Post ReplyReply Direct Link To This Post Topic: Flight Line T V Speeds Thread
    Posted: March-31-2006 at 7:23pm
Originally posted by CRJ200Pilot

Hi,


I'm new to this forum, but not to Reality-XP.  I just started using the Flight Line T products, and was completely blown away.  I do a lot of panel editing, and one of my biggest problems was finding airspeed indicators that displayed the correct v-speeds.  I was just about to resign myself to learning how to program my own gauges.  But, being able to custom-configure the AI with the config program is amazing!  Awesome guys!!!  The only thing that would make it perfect would be an indicator that went over 200kts.  The first plane I used it on was a Seneca, which has a VNE of 217.  But, being able to add the red and blue lines for VYSE and VMC makes it all better.




I have actually been chatting to Jean-Luc about the V speed issue...I suggested that it might be a good idea if we had something like the community files but a section that had Vspeed performance data for any of the aircraft that you own or commonly fly. This would allow or panel designers more info to ensure that the data input is more accurate.

Also, could be used in JL4 where V1 Vr and V2 and Flap Speeds can be input to give more accurate representation on the instrument.

So, for those with AOMs...it might take a little typing but the data would be most useful and I believe would further increase the flying fun having more realisic data driving our displays.
Best Regards, Munro

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CRJ200Pilot View Drop Down
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Posts: 34 		Post Options Post Options   Quote CRJ200Pilot Quote  Post ReplyReply Direct Link To This Post Posted: April-01-2006 at 4:55am

Not a bad idea.  I've got POHs for all the aircraft I trained in: Cessna 182, Piper Cherokee PA-28-140, 161, and 200R (Arrow), Seneca PA-34-200, and data for the Aeronca Champ (7DC).  

Just make sure before entering that file section that there is a big disclaimer stating that data is "not for operational use".  The last thing anyone wants is to have some rich doctor spinning and crashing his new SR22 because somebody posted the wrong VSO speed and he was too stupid and egotistical to read his real POH.

For example, AirNav.com is a great place to get airport data, but all the approach plates you can download from them are under a bold heading that says "not for navigation", just to release themselves from any liability when some iddiot flys into a mountain.
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Munro View Drop Down
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Posts: 268 		Post Options Post Options   Quote Munro Quote  Post ReplyReply Direct Link To This Post Posted: April-01-2006 at 8:38am
That's a good idea...it should be easy to add a disclaimer to the data posted...probably should also include something that says "Only for use with Flight Simulator"
Best Regards, Munro

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alastairmonk View Drop Down
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Posts: 6892 		Post Options Post Options   Quote alastairmonk Quote  Post ReplyReply Direct Link To This Post Posted: April-04-2006 at 7:20pm
Actually I've already started to do this for myself, and have an Excel spreadsheet with about 40 (mostly GA) aircraft with the relevant V-speeds gleaned from the reviews in the AOPA magazine.

If you would like to use this data as a starting point I'd happily email it to someone !



Cheers,

Alastair

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Reality XP View Drop Down
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Posts: 4419 		Post Options Post Options   Quote Reality XP Quote  Post ReplyReply Direct Link To This Post Posted: April-05-2006 at 1:58pm

Impressive Alastair! Would you agree we publish the file directly from our website? I'm thinking of a link directly in the product page for example?

Jean-Luc

 
Jean-Luc
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alastairmonk View Drop Down
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Posts: 6892 		Post Options Post Options   Quote alastairmonk Quote  Post ReplyReply Direct Link To This Post Posted: April-05-2006 at 6:57pm
Hi Jean-Luc,

A direct download might indeed be best. Maybe in PDF format so that its accessible to all users, and you may want to give some thought to whether you want to verify any supplied data ?

As a suggestion, users could submit additions to the database along with suggested corrections where necessary, and you could update the download periodically ?

Anyway, I've emailed you the file, so use it as you like!

Alastair

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Munro View Drop Down
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Posts: 268 		Post Options Post Options   Quote Munro Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2006 at 12:33am
Hi Alastair

That sure is a good start...I have a few aircraft that I can provide details for...some business jets...so might need to expand file to include weight ranges for several of the parameters.

But this is clearly the idea that I had and I think that if we can get those users that actually own or have access to some of the aircraft that have been modified for Reality-XP gauges and also those aircraft that they would like to see.

Those great panel designers might be interested in developing additional panels if they had this extra info on the aircraft.

I want to thank Jean-Luc for providing the space on his web site.

Best Regards, Munro

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alastairmonk View Drop Down
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Posts: 6892 		Post Options Post Options   Quote alastairmonk Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2006 at 2:27am
Hi Munro,

I understand that many of the V-speeds will vary according to weight, but how does this affect the marked ranges on the Airspeed dial ? Clearly the "first call" on the information would be to allow users to input the figures into the Airspeed section of the Config utility to set the airspeed zones/marks on the dial.

Either way, having a database of weight-dependant V-speeds will be a useful reference.

Alastair

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Adverse Yawn View Drop Down
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Posts: 61 		Post Options Post Options   Quote Adverse Yawn Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2006 at 3:03am
The weight variable speeds are Vs0 and Vs1. For the purposes of ASI colour coding they assume MAUW. Business Jets, because of their relatively huge speed, altitude, CofG and weight spectrums require the speeds to be calculated on the day and so are not relevant for ASI colour coding.
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Reality XP View Drop Down
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Posts: 4419 		Post Options Post Options   Quote Reality XP Quote  Post ReplyReply Direct Link To This Post Posted: April-10-2006 at 11:43am

Thank you Alastair for your help to the community! your file can now be downloaded directly from the Community's Library!

Jean-Luc
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alastairmonk View Drop Down
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Posts: 6892 		Post Options Post Options   Quote alastairmonk Quote  Post ReplyReply Direct Link To This Post Posted: April-10-2006 at 6:58pm
Hi Jean-Luc,

Glad to help !

If others want to post the values either here or to me by email, I'll keep the file updated and uploaded at regular intervals.

Alastair

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Munro View Drop Down
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Posts: 268 		Post Options Post Options   Quote Munro Quote  Post ReplyReply Direct Link To This Post Posted: April-10-2006 at 7:36pm
On the JL4 product we do have the capacity to show Vspeeds dynamically like in the real aircraft...so the purpose of the data base was not just for FltLine T but to provide the users data that they can use in their other Reality-XP products that will benefit from this additional info.
Best Regards, Munro

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alastairmonk View Drop Down
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Posts: 6892 		Post Options Post Options   Quote alastairmonk Quote  Post ReplyReply Direct Link To This Post Posted: April-11-2006 at 5:09am
Hi Munro,

Let me have the data and I'll include it in the table.

Alastair

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darrenecm View Drop Down
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Posts: 62 		Post Options Post Options   Quote darrenecm Quote  Post ReplyReply Direct Link To This Post Posted: April-16-2006 at 11:22am

Originally posted by alastairmonk

Actually I've already started to do this for myself, and have an Excel spreadsheet with about 40 (mostly GA) aircraft with the relevant V-speeds gleaned from the reviews in the AOPA magazine.

If you would like to use this data as a starting point I'd happily email it to someone ! 



Cheers,

Alastair

I'd like a copy of that Excel file Alastair.

However, wouldn't the accuracy of an aircrafts v-speeds as implemented in MSFS depend on what the creator of any aircraft add-on has specified. Are such figures as V-speeds contained in the .air file for each MSFS aircraft? I'm no expert so may be wrong in this regard.

Is there an .air editor tool that allows one to view the contents of this file. If the v-speeds are indeed contained in this file it might be a better method of obtaining this data.
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alastairmonk View Drop Down
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Posts: 6892 		Post Options Post Options   Quote alastairmonk Quote  Post ReplyReply Direct Link To This Post Posted: April-16-2006 at 6:02pm
Hi Darren,

You're quite right, however the table is principly to define the zones on the RealityXP Flightline T airspeed gauge.



VS0 = Stall, landing flaps = start of white arc
VS1 = Stall, clean = start of green arc
VFE = max flaps extension speed = end of white arc
VNO = max structural cruise speed = end of green arc
VNE = never exceed speed = red mark
VLE = max gear extension speed = triangle

If the particular flight model is inacurate then either the values for the gauge would have to be adjusted or practical knowledge of the aircraft's performance applied. In any case, the values are only a guide (with perhaps the exception of the VNE speed) as atmospheric effects and fuel loading will affect the VSO and VS1 speeds.

For most of the "good" GA products from the likes of Flight One and Dreamfleet the flight profile is spot on !

The spreadsheet can be obtained here:

http://reality-xp.com/community/files.htm

Alastair

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darrenecm View Drop Down
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Posts: 62 		Post Options Post Options   Quote darrenecm Quote  Post ReplyReply Direct Link To This Post Posted: April-17-2006 at 4:44am

Originally posted by alastairmonk

Hi Darren,

You're quite right, however the table is principly to define the zones on the RealityXP Flightline T airspeed gauge. 

VS0 = Stall, landing flaps = start of white arc
VS1 = Stall, clean = start of green arc
VFE = max flaps extension speed = end of white arc
VNO = max structural cruise speed = end of green arc
VNE = never exceed speed = red mark
VLE = max gear extension speed = triangle

If the particular flight model is inacurate then either the values for the gauge would have to be adjusted or practical knowledge of the aircraft's performance applied. In any case, the values are only a guide (with perhaps the exception of the VNE speed) as atmospheric effects and fuel loading will affect the VSO and VS1 speeds.

For most of the "good" GA products from the likes of Flight One and Dreamfleet the flight profile is spot on !

The spreadsheet can be obtained here:

http://reality-xp.com/community/files.htm

Alastair

Thanks for the file.

I went rhough a few of the aircraft in MSFS and loaded up the kneepad HTML files in various aircraft folders. Some of these files listed most of the v speeds for that aircraft and a few did differ from the values listed in your spreadhseet, but only by 1 or 2.

My query was mostly to find out if it was at all possible for RXP developers to automate the airspeed settings by interrogating the .air file for the values of the aircraft the gauges were installed on. From what I can gather though this would be a little difficult and unreliable, It's easier and far more flexible to manually alter these things yourself. A very good design choice on the part of the RXP devs :)

 

 
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alastairmonk View Drop Down
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Posts: 6892 		Post Options Post Options   Quote alastairmonk Quote  Post ReplyReply Direct Link To This Post Posted: November-15-2007 at 10:59am
Update:

Since the last message here there have been some new GA releases, so I have updated and expanded the database.

As there are currently no fresh uploads being added to the Community User Files page, I attach the updated file for everyone's use.



As always, the information is as accurate as I can make it, thanks to such sites as AOPA, but don't regard the information as being absolute gospel.

20071115_105411_VSpeeds.zip

Alastair

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Reality XP View Drop Down
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Posts: 4419 		Post Options Post Options   Quote Reality XP Quote  Post ReplyReply Direct Link To This Post Posted: November-19-2007 at 1:00pm

Thank you very much for your help Alastair with this! it is much appreciated!!

Jean-Luc
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BillM View Drop Down
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Posts: 35 		Post Options Post Options   Quote BillM Quote  Post ReplyReply Direct Link To This Post Posted: July-06-2008 at 12:34pm

My two cents worth.

Here are the V-speeds for the Alphasim T-6 Texan/Harvard.  I derived the speeds from the manual that accompanied the model.

note: reference speeds in aircraft manual were given in mph so all speeds kt IAS converted from mph with formula kt=mph/1.1 and rounded appropriately
VS0 = 58kt
VS1 = 65
VFE = 114
VNO = 190
VNE = 220
VLE = 135

Bionic Bill
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Reality XP View Drop Down
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Posts: 4419 		Post Options Post Options   Quote Reality XP Quote  Post ReplyReply Direct Link To This Post Posted: December-02-2009 at 2:53pm
The database is now available in our community library:

http://www.reality-xp.com/community/
Jean-Luc
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