Why still no dive acceleration difference?

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Fruitbat, fw190A8 has extra exhaust thrust when max level fly at sea level. So fw190a8 could achieve 580 km/h with the help of (1950HP*0.8+exhaust thrust).


IMG_0830.jpg

580km/h is quite a high speed, so fw190 A8 is boosted by more than 2000HP.

P47 loses its exhaust thrust due to exhaust turbocharger.

The Fw 190 A-8 entered production in February 1944, powered either by the standard BMW 801 D-2 or the 801Q (also known as 801TU). The 801Q/TU, with the "T" signifying a Triebwerksanlage unitized powerplant installation, was a standard 801D with improved, thicker armour on the front annular cowling, which also incorporated the oil tank, upgraded from 6 mm (.24 in) on earlier models to 10 mm (.39 in). Changes introduced in the Fw 190 A-8 also included the C3-injection Erh?hte Notleistung emergency boost system to the fighter variant of the Fw 190 A (a similar system with less power had been fitted to some earlier Jabo variants of the 190 A), raising power to 1,980 PS (1,953 hp, 1,456 kW) for a short time. The Erh?hte Notleistung system operated by spraying additional fuel into the fuel/air mix, cooling it and allowing higher boost pressures to be run, but at the cost of much higher fuel consumption. From the A-8 on, Fw 190s could be fitted with a new paddle-bladed wooden propeller, easily identified by its wide blades with curved tips



So fw190a8 drag coefficient is no less than 0.2790.

Or we could calculate the loaded weight fw190A8, that's 4500kg.


when dive in 45 degree, let the new equilirium speed as V:

new engine thrust should be 7231*(161/V)

m*g* sin(45)+t=d*V^2

4500*9.8*0.707+7231*(161/V)=0.2790*V^2

thus

v^3-111752V-4172728=0

Finally, we get V=352m/s=1267km/h>1232.6km/h. Slightly bigger than a 6-ton P47D. If we use a 7-ton P47D, again, P47 has more equilibrium speed.

So, the aircraft weight plays a important role in a 45 degree dive.