Help and Support Forums => Help and Training => Topic started by: nrshida on April 07, 2017, 05:20:05 AM
Title: AH Airspeed Indicator
Post by: nrshida on April 07, 2017, 05:20:05 AM
How is the Airspeed Indicator modelled in AH? Is the pitot tube thingy functionally represented by a velocity vector matching the vector sticking out the front of the nose?
Title: Re: AH Airspeed Indicator
Post by: LTCClark on April 09, 2017, 02:00:08 AM
no it is a computer thingy that measures your indicated and true airspeed.
indicated is always off of the pitot tube, true is indicated by ground distance traveled , which increases with altitude.
so indicated is what you need to pay attention to when it comes to stalls and behaviours of aircraft.
true airspeed is how much ground you are going to cover before you are going to die by the hand of some picktard.
Sent from my SM-N920P using Tapatalk
Title: Re: AH Airspeed Indicator
Post by: nrshida on April 10, 2017, 03:58:46 AM
no it is a computer thingy that measures your indicated and true airspeed.
indicated is always off of the pitot tube, true is indicated by ground distance traveled , which increases with altitude.
so indicated is what you need to pay attention to when it comes to stalls and behaviours of aircraft.
true airspeed is how much ground you are going to cover before you are going to die by the hand of some picktard.
It's interesting that you say that, because my question was partly prompted by some weirness observed between the 'true' and 'indicated' especially when flying sideways and backwards. The 'true' seems to increase much faster when recovering. So I was wondering how they were modelled and how trustworthey they were to indicate a recovery.
Title: Re: AH Airspeed Indicator
Post by: LTCClark on April 11, 2017, 02:14:48 AM
give me a film to watch
Sent from my SM-N920P using Tapatalk
Title: Re: AH Airspeed Indicator
Post by: hitech on April 11, 2017, 03:31:20 PM
If you are flying perfectly sideways at 100 mph the indicated air speed will be zero.
HiTech
Title: Re: AH Airspeed Indicator
Post by: Mongoose on April 11, 2017, 09:44:09 PM
If you are flying perfectly sideways at 100 mph the indicated air speed will be zero.
HiTech
OK. But would the true air speed also be zero? I would think it would since true air speed is calculated from indicated air speed. Or does the game show true air speed independent of indicated air speed.
Just curious.
Title: Re: AH Airspeed Indicator
Post by: TequilaChaser on April 12, 2017, 02:01:32 AM
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
Speedometer •There are several different speedometers in the game, depending on aircraft country of origin, although they all operate the same way •All speeds in mph •Speedometer shows two different markings •White needle is Indicated Air Speed (IAS) which is affected by pressure differences between altitudes. •Red Mark indicates True Air Speed (TAS), adjusted for changes in altitude. EDIT: Temperature, humidity, Atmospheric conditions all affect TAS
Going off of what hitech posted, still doesn't tell the OP if the "pitot tube" on the different planes in game, are "Functionally Represented" or if the "pitot tube" is just modeled for "Visual Attributes"
I am not certain, but think that hitech has used the formulas ( read as coading, lol ) to calculate IAS and TAS for each individual plane, and that each individual planes pitot tube is there only for cosmetic reasons...... the reason I believe it to be this way is because when you are flying a plane and your wing is shot off, your indicated airspeed is still showing, it might be speeding up, it might be slowing down, but it doesn't "zero out" once the wing where the pitot tube is mounted is shot/blown off....(regardless if it's the right wing or left wing, but it is the wing that has the pitot tube mounted to it!)
OK. But would the true air speed also be zero? I would think it would since true air speed is calculated from indicated air speed. Or does the game show true air speed independent of indicated air speed.
Exactly. I noticed the true air speed needle sprang back up much faster when returning to 'normal' flight. Faster than the difference in normal acceleration.
Title: Re: AH Airspeed Indicator
Post by: 2bighorn on April 12, 2017, 07:06:25 PM
It's interesting that you say that, because my question was partly prompted by some weirness observed between the 'true' and 'indicated' especially when flying sideways and backwards. The 'true' seems to increase much faster when recovering. So I was wondering how they were modelled and how trustworthey they were to indicate a recovery.
In AH, both IAS and TAS are trustworthy. That said, for 'stall recovery' you should be concerned with IAS only. That applies to all V speeds references too.
In AH TAS measures speed of AC through surrounding air mass, so your plane could be falling down (after tail down stall for example) and accelerate to 300mph TAS, yet IAS would remain close to 0mph until you would manage to get the nose down.
Title: Re: AH Airspeed Indicator
Post by: nrshida on April 13, 2017, 03:28:33 AM
All hail Bighorn, thane of the stall fighters, and that little gravelly patch next to the garden shed! (http://i1114.photobucket.com/albums/k526/rwrk2/notworthy.gif)
I was wondering if the difference in speed (of the needles) in returing to correct readings between the TAS & IAS was saying something profound about what you had done during the 'post-stall phase'. Bit esoteric I expect. Sorry :)
P.S. Never thought to look in the film viewer, that records a speed but I never knew which one?
Title: Re: AH Airspeed Indicator
Post by: Dawger on April 13, 2017, 09:15:28 AM
In AH, both IAS and TAS are trustworthy. That said, for 'stall recovery' you should be concerned with IAS only. That applies to all V speeds references too.
In AH TAS measures speed of AC through surrounding air mass, so your plane could be falling down (after tail down stall for example) and accelerate to 300mph TAS, yet IAS would remain close to 0mph until you would manage to get the nose down.
True air speed is derived from indicated airspeed so if your IAS is zero, your TAS is zero.
Your velocity may be 300 mph when falling but it isn't, strictly speaking, your TAS.
Indicated airspeed is what the gauge reads, calibrated airspeed is IAS corrected for instrument error, Equivalent airspeed is CAS corrected for compressibility of air and True airspeed is either CAS or EAS corrected for air density (CAS in slow planes and EAS in fast, high flying planes)
The game may or may not be correct in this respect.
Title: Re: AH Airspeed Indicator
Post by: 2bighorn on April 13, 2017, 05:33:13 PM
I was wondering if the difference in speed (of the needles) in returing to correct readings between the TAS & IAS was saying something profound about what you had done during the 'post-stall phase'. Bit esoteric I expect. Sorry :)
Hey nrshida, long time no see. Anyways, no, never bothered with speed indicators unless landing and taking off, diving, or high altitude flying when difference between IAS and TAS is at it's most.
Quote from: Dawger
Your velocity may be 300 mph when falling but it isn't, strictly speaking, your TAS.
Strictly speaking, TAS is the actual speed of the aircraft through the air mass. TAS may not be what gauges show as TAS and in some circumstances it may be way off.
Quote from: Dawger
Indicated airspeed is what the gauge reads, calibrated airspeed is IAS corrected for instrument error, Equivalent airspeed is CAS corrected for compressibility of air and True airspeed is either CAS or EAS corrected for air density (CAS in slow planes and EAS in fast, high flying planes)
Yes, and these days flight computers can use additional data from myriad of sensors and sources like altimeters, accelerometers, gyroscopes, GPS, radars, etc, to more accurately calculate TAS under most circumstances.
Quote from: Dawger
The game may or may not be correct in this respect.
As long as end result is correct, does it really matter how it was calculated?
Title: Re: AH Airspeed Indicator
Post by: Owlblink on April 13, 2017, 08:05:57 PM
It's "good enough" :aok
Title: Re: AH Airspeed Indicator
Post by: nrshida on April 14, 2017, 12:09:27 AM
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?
Title: Re: AH Airspeed Indicator
Post by: Traveler on April 17, 2017, 01:38:11 PM
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.
Title: Re: AH Airspeed Indicator
Post by: colmbo on April 17, 2017, 02:15:15 PM
Buffett and overstress groan....what more do you need? :)
Title: Re: AH Airspeed Indicator
Post by: nrshida on April 17, 2017, 02:43:44 PM
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. :neener:
Title: Re: AH Airspeed Indicator
Post by: Dobs on April 19, 2017, 07:39:21 AM
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:)
Title: Re: AH Airspeed Indicator
Post by: FLS on April 19, 2017, 04:29:29 PM
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.
Title: Re: AH Airspeed Indicator
Post by: Dobs on April 19, 2017, 06:37:38 PM
The video above sort of hints otherwise.. have not tried just adding ruddr in tonsee ifnbleeds speed or not, bit will.
Title: Re: AH Airspeed Indicator
Post by: FLS on April 19, 2017, 06:48:52 PM
Good idea. You could test first, then post, instead of vice versa. :aok
Title: Re: AH Airspeed Indicator
Post by: nrshida on April 20, 2017, 12:03:55 AM
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 :)
Title: Re: AH Airspeed Indicator
Post by: mikeWe9a on April 27, 2017, 08:25:08 AM
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.