Offset for current stalling speed?

[Chris Brett]

Hi all,

Just wondering of there is an offset providing the aircraft's current calculated stall speed in KIAS? Can't seem to find reference to anything that might be useful to determine this.

Chris

[Pete Dowson]

Just wondering of there is an offset providing the aircraft's current calculated stall speed in KIAS? Can't seem to find reference to anything that might be useful to determine this.

There's nothing I know of. There are the constants:

DESIGN SPEED VS0: straight & level stall speed with full flaps?

DESIGN SPEED VS1: straight & level stall speed clean?

I can obtain these in FS2002, FS2004 and FSX if anyone wants them -- no one has asked these past many years though. they would presumably be the fixed lower white-line points on the typical ASI.

I assume that whether the aircraft is going to stall at any particular time is dependent upon the entire simulation. I am not even sure that an airspeed would be derived first. There's certainly nothing I know of supplied via the Gauges interface, nor in the otherwise reasonably comprehensive set of values supplied by SimConnect in FSX.

Regards

Pete

[Chris Brett]

Hi Pete,

Thanks for your reply.

Those values you suggest may prove useful indeed - if they can be made available via FSUIPC (still using FS2004 at the mo!) that would be great. That, combined with AoA info and G info, may allow me to derive the information I need, at least for some phases of flight.

Purpose of this is to get an accurate manouvre and stall speed (min speed/barber pole) indication on electronic flight instruments.

Alternatively, is there a known stalling (max) AoA variable for current flight conditions, together with actual AoA variable at the present flight moment? Maybe something could be used from those too.

I better dig out the ATPL Principles of Flight manuals... :-)

Regards

Chris

[Pete Dowson]

Those values you suggest may prove useful indeed - if they can be made available via FSUIPC (still using FS2004 at the mo!) that would be great. That, combined with AoA info and G info, may allow me to derive the information I need, at least for some phases of flight.

I'll look at adding them when I get back from holiday. Sorry, I'm off till the 20th after tomorrow.

Please send me an email to remind me: petedowson@btconnect.com. I can file it in "pending" if it arrives before I go.

Alternatively, is there a known stalling (max) AoA variable for current flight conditions, together with actual AoA variable at the present flight moment? Maybe something could be used from those too.

There's an actual, but I've no idea about the other. You could do with discussing this stuff with one of the aircraft design experts around. It isn't really stuff I know a lot about.

Regards

Pete