Why don´t these figures match up?

[MusseMus]

Originally Posted by ZaltysZ

IAS will be equal to TAS at sea level only at certain air pressure and temperature. If present conditions are different (like you are flying on hotter/colder day), TAS and IAS will be different even if you are almost "surfing" the waves in your plane.

Yes thats right but I don't have the time and skill to calculate them My point was that it seems like there is quite a big difference between the speed gauge in the spit and 109. Countless posts on this forum complain about the spit is going too slow in level flight and most of them draw this conclution from the speed gauge alone. I'm not saying they are wrong, but reading the speed gauges gives the impression that a 109 is travelling much faster than a spit, even if they are flying side by side.

[NaBkin]

Originally Posted by MusseMus

Yes thats right but I don't have the time and skill to calculate them My point was that it seems like there is quite a big difference between the speed gauge in the spit and 109. Countless posts on this forum complain about the spit is going too slow in level flight and most of them draw this conclution from the speed gauge alone. I'm not saying they are wrong, but reading the speed gauges gives the impression that a 109 is travelling much faster than a spit, even if they are flying side by side.

You're right. This isn't a IAS/TAS issue (if TAS or IAS — neither give the expected values in the calculation and it's only a few % difference in this low altitude on a regular day anyway).

Also it's not an FM issue because even with a completely wrong FM (say if you do the calculation with the "FM" of a juggernaut, you should get the expected values).

So I'm getting the feeling that the speed gauges in CloD are a mess. It seems that they show an incorrect (too slow) speed.
15% too slow for the Spit and 5% too slow for the 109.

If you think further and considering the numbers MusseMus brought up a few posts earlier, the FM of the Spitfire actualy could be 15% faster than the gauge indicates and the Me109 would be arround 5% faster.
Maybe it's "just" an issue of incorrect display of gauges rather than incorrect FM Should be very easy to fix I suppose...

[MusseMus]

Originally Posted by NaBkin

Maybe it's "just" an issue of incorrect display of gauges rather than incorrect FM Should be very easy to fix I suppose...

If this is the case it would be quite hilarious
Or maybe the FM's are in fact wrong, but not as much as one would think reading the speed gaugets.
Or maybe my test is flaud I would very much like to see if others get the same results.

[jf1981]

Originally Posted by NaBkin

So I'm getting the feeling that the speed gauges in CloD are a mess. It seems that they show an incorrect (too slow) speed.
15% too slow for the Spit and 5% too slow for the 109

Hi

Possible, I noticed some variant of the Spit had completely false vertical speed indicator, I had to rely on altimeter for vertical speed tests of the current model. The gage was away from 25 to 50% depending upon altitude.

I do not think I have made any mistake, so the gage must be false. More people testing on those kind of issue should make for more consistency of those facts.

[SlipBall]

Originally Posted by NaBkin

You're right. This isn't a IAS/TAS issue (if TAS or IAS — neither give the expected values in the calculation and it's only a few % difference in this low altitude on a regular day anyway).

Also it's not an FM issue because even with a completely wrong FM (say if you do the calculation with the "FM" of a juggernaut, you should get the expected values).

So I'm getting the feeling that the speed gauges in CloD are a mess. It seems that they show an incorrect (too slow) speed.
15% too slow for the Spit and 5% too slow for the 109.

If you think further and considering the numbers MusseMus brought up a few posts earlier, the FM of the Spitfire actualy could be 15% faster than the gauge indicates and the Me109 would be arround 5% faster.
Maybe it's "just" an issue of incorrect display of gauges rather than incorrect FM Should be very easy to fix I suppose...

If true that would be funny, and explain a lot.

[klem]

Originally Posted by NaBkin

You're right. This isn't a IAS/TAS issue (if TAS or IAS — neither give the expected values in the calculation and it's only a few % difference in this low altitude on a regular day anyway).

Also it's not an FM issue because even with a completely wrong FM (say if you do the calculation with the "FM" of a juggernaut, you should get the expected values).

So I'm getting the feeling that the speed gauges in CloD are a mess. It seems that they show an incorrect (too slow) speed.
15% too slow for the Spit and 5% too slow for the 109.

If you think further and considering the numbers MusseMus brought up a few posts earlier, the FM of the Spitfire actualy could be 15% faster than the gauge indicates and the Me109 would be arround 5% faster.
Maybe it's "just" an issue of incorrect display of gauges rather than incorrect FM Should be very easy to fix I suppose...

Something to think about:
http://forum.1cpublishing.eu/showpos...&postcount=178

I can't draw a definite conclusion but between testing that may not be accurate, considerations of the 'standard day' and possible differences in the way gauges are fed with data there's a lot open to debate. After the patch I'll test a Spitfire and a 109 to see how they pan out. I'll also update this:
http://forum.1cpublishing.eu/showpos...12&postcount=1
to look at Z_TAS as well as TAS calculated from IAS gauge to see how they compare. You may like to use it for testing then. We could be in for some surprises.

[NaBkin]

Originally Posted by SlipBall

If true that would be funny, and explain a lot.

Yeah, and now how can we let know Luthier and his team about this...

[Toni74]

Originally Posted by MusseMus

Observation 2:
The airspeed gauge on the 109 red 320 kph, but the calculation gave me 325 kph=a difference ofabout 5%

less than 2%.

[Ribbs67]

why couldn't 2 people get on comms then jump into a server and fly side by side. Once speed is matched, both look at there gauges and report the speed that is indicated...

[IvanK]

Originally Posted by jf1981

Hi

Possible, I noticed some variant of the Spit had completely false vertical speed indicator, I had to rely on altimeter for vertical speed tests of the current model. The gage was away from 25 to 50% depending upon altitude.

I do not think I have made any mistake, so the gage must be false. More people testing on those kind of issue should make for more consistency of those facts.

In the many climb tests I have done I have also found the RAF VSI overeading in the climb when compared with Altitude change versus time.