Mosquito speed??

[The_Ant]

Is the Mosquito speed shown as indicated or true airspeed.I can fly at 391 km/h in the mossie and it eats the distant counter,but flying a P47-22/28 at 475 km/h nothing seeams to happen to the distant counter it only goes down slowly,even if im having  84 km/h more speed..

[Supercharger]

The HUD is showing IAS only, but on ground level the Mosquito should be at least as fast as a Thunderbolt anyway.....