Hurricane Speed Test in game

[IvanK]

Crumpp you said "Try the dry adiabatic lapse rate of 3 degree C / 1000 feet.... "

Why ?

The International Standard Atmosphere (ISA) lapse rate is 1.98 deg C per 1000 feet !

Its going to give a TAS even lower than what the IAS to TAS conversion above gives.
e.g. Based on the assumption Surface Temp is 19C then using the DALR at 3C/1000ft gives an OAT at 16,000ft of -29C so the 231MPH IAS I got would result in TAS of 289MPH versus the 298MPH TAS value I got using the ISA lapse rate.

[bongodriver]

I think Crumpp just wanted to quote from his text book....


But while on the subject of ISA......I have been getting strange ideas in my head about the QNH the game seems to model of 992 and can't get the idea out of my head about the US 29.92 inches of mercury and wonder if someone porked the atmosphere model that way.......crazy I know.

[Bounder!]

Just wanted to post and say thanks for the all testing IvanK, always nice to see how the current simulated ac in CoD perform against real data.

[IvanK]

Thats some lateral thinking Bongodriver but worthy of a mention to the devs .... Done.

[DC338]

Yes the QNH is strange, given that during the battle the QNH didn't often go below 1005.

[Crumpp]

Why ?

The International Standard Atmosphere (ISA) lapse rate is 1.98 deg C per 1000 feet !

I miss read your FTH and thought it might line it up better.

Your raw test data FTH aligns with the data converted to standard. In otherwords, the game is showing the FTH to be 17,500 ft, without conversion right?

If that is the case, the atmospheric conditions in the game are standard.

What was your Vy in the test, too?

[IvanK]

Its a SPEED test not a climb test so what is the relevance of Vy. As discussed in the in the initial thread these are level speed runs looking for max TAS at each altitude tested.