AH Airspeed Indicator

[nrshida]

It's "good enough" 

Wasn't a criticism, just a technical enquiry.

[hitech]

Dot product, inverse of cosine and then measure the magnitude? And if the angle is not acute after the arc cos then air speed indicated zero?

Good guess.

Cut and paste from AH.


   PitoDot = maDOT(ForceModel->RelAirVelNormal,madFwdVec);
   if(PitoDot < 0)
      PitoDot = 0;
   ForceModel->PitoTubeAirSpeed  = ForceModel->IndicatedAirSpeed * PitoDot;

[nrshida]

Woah, the sacred code   

Very compact code (and helpful). Thanks 

[Mongoose]

Aces High shows both:

IAS (Indicated Air Speed) = Long White Needle pivoting from center of Speedometer out

TAS (True Air Speed) = Short Red Needle that pivots from outer ring edge in

With AHIII, I couldn't see the red TAS needle anymore, and I thought it had been eliminated.  After this post, I took a look using the zoom, and I found it.  But I can't see it from normal pilot's head position.  Do I need to make an adjustment, or is this just the way it is now?

[Traveler]

With AHIII, I couldn't see the red TAS needle anymore, and I thought it had been eliminated.  After this post, I took a look using the zoom, and I found it.  But I can't see it from normal pilot's head position.  Do I need to make an adjustment, or is this just the way it is now?

TAS has no useful purpose except for flight planning, because there is no need for planning in the game.  TAS is useless info.

[colmbo]

Buffett and overstress groan....what more do you need?

[nrshida]

Buffett and overstress groan....what more do you need?

What about sub buffet-speed flying? 

[Mongoose]

TAS has no useful purpose except for flight planning, because there is no need for planning in the game.  TAS is useless info.

  You go ahead and do your flights without any planning.  I find planning very useful.  So there.   

[Dobs]

IAS-what your instrument reads (dynamic pressure based on Sea level)
TAS--speed through the air mass corrected for Temperature and pressure (atmospheric pressure). Since the higher you go, the lower the temp and atmospheric pressure....the HIGHER your TAS.  TAS and IAS should be equal at sealevel.
GS (ground speed)--speed at which you travel over the ground.

Airspeed is not affected by wind as it reflects how fast the wind is traveling over the wings.
Ground speed IS affected by wind as it reflects your travel in the air mass, i.e. a head wind may give you a High TAS but a low GS.

What is missing is fuselage drag:)

[FLS]

...

What is missing is fuselage drag:)
...

I believe fuselage drag and lift are modeled.  If you lose part of the plane that part no longer provides lift or drag but drag from damage is not added. The WW1 aircraft may be slightly different, they were the first to get more detailed damage.

[Dobs]

The video above sort of hints otherwise.. have not tried just  adding ruddr in tonsee ifnbleeds speed or not, bit will.

[FLS]

Good idea. You could test first, then post, instead of vice versa. 

[nrshida]

IAS-what your instrument reads

Only when you're pointing in the expected direction!

What is missing is fuselage drag:)

I do a similar thing in post stall in my Ki-84, if you let that wing tuck under when sideways then the plane flips over and the larger wing than empinage area makes it hard to get any alpha back. Usually have to slice it back in with roll. Yak-3 seems to float much better according to your video. When losing the verical stab does it retain a small stump at the bottom?

Can't comment about the drag. Have no experience doing this with real aircraft. Much harder to respawn in real life 

[mikeWe9a]

IAS-what your instrument reads (dynamic pressure based on Sea level)
TAS--speed through the air mass corrected for Temperature and pressure (atmospheric pressure). Since the higher you go, the lower the temp and atmospheric pressure....the HIGHER your TAS.  TAS and IAS should be equal at sealevel.
GS (ground speed)--speed at which you travel over the ground.

  Technically, lower temperature will result in a lower TAS for the same IAS at a given pressure altitude (or, more accurately from a physics point of view, a higher IAS for a given TAS) since a lower temperature will result in denser air.

  TAS is the "actual" speed through the air, but can't be measured directly by pressure instruments, and has no impact on lift or drag, as long as you are below the transonic region.  Notably, one area where TAS does have an effect on aircraft performance is in thrust.  As your TAS increases, thrust from a propeller will drop off for any given engine power output, if all other conditions are the same.

Mike