P-51 B sea level top speed.

[Roland_HUNter]

Ingame:
 

Packard V-1650-3:

 

Maximum true air speed at sea level, engine mode - WEP: 600 km/h (373 mph) (67 inch)

 

Packard V-1650-7:

 

Maximum true air speed at sea level, engine mode - WEP: 604 km/h (375 mph) (67 inch)

This report shows:
http://www.wwiiaircraftperformance.org/mustang/p-51b-engdiv-na-flighttestdata.jpg

Packard V-1650-3: 373 mph
Packard V-1650-7: 385 mph
Gross W.: ~8500 LB.

This report shows:
http://www.wwiiaircraftperformance.org/mustang/P-51B_24777_Speed_Altitude.jpg
Packard V-1650-7:361 mph
Gross W.~9335 LB

This report shows:

http://www.wwiiaircraftperformance.org/mustang/eglin-p51b-level.jpg

Packard V-1650-7:355 mph
And 376 mph for 150 oct.


And this shows:
http://www.wwiiaircraftperformance.org/mustang/p51b-24777.html

Packard V-1650-3: 369 mph
Packard V-1650-7: 373 mph

What is the truth? :O

[ACG_Cass]

2 hours ago, Roland_HUNter said:

This report shows:
http://www.wwiiaircraftperformance.org/mustang/P-51B_24777_Speed_Altitude.jpg
Packard V-1650-7:361 mph
Gross W.~9335 LB

I'd assume that the "Without wing racks" means the rest of the rests were done with racks.

 

2 hours ago, Roland_HUNter said:

This report shows:

http://www.wwiiaircraftperformance.org/mustang/eglin-p51b-level.jpg

Packard V-1650-7:355 mph
And 376 mph for 150 oct.

This test hasn't been converted to standard pressure so the speeds are dependant on the temperature and pressure of the day

 

The rest I'd say are close enough. The model has to factor in lift, drag, prop efficiency and be correct at all altitude so a a given % of inaccuracy will always be there.