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The important word is theoretical. A Spitfire will only do 600MPH in a very long dive and risks things falling off.
It would, I was just saying it is a calculated number. If you have reversal at 600 MPH you have problems long before. The Spitfire that did the highest speed levelled out when the prop fell off and changed the CoG.The Mk 21 would still be well manoeverable at such speeds and its wings not be in danger of desintegrating. This is a definite advantage to earlier marks and possibly to most other late-/postwar fighters as well.
The Mk 21 would still be well manoeverable at such speeds and its wings not be in danger of desintegrating. This is a definite advantage to earlier marks and possibly to most other late-/postwar fighters as well.
The late P-38 had hydraulically boosted aielerons which enabled it to outroll every other fighter. Impressive if one consider its size.
Now the Fw 190D-13 had them, too. It should roll even better as it is much smaller.
I've seen charts with a boosted P-38J at over 120° per second at over 420 mph. Don't have it just here, but it's out there. There is a chart on wwiiaircraftperformance.org that shows a P-38J with boost having a time to roll 90° at 0.45 seconds, which gives under 1 second for a 180° roll at 400 mph (or more since the initial roll acceleration has already been accomplished). See it here: http://www.wwiiaircraftperformance.org/p-38/p-38j-roll.jpg
You might notice the Fw 190, while blinding at 250 mph, is going to be less than 75° per second at 400+ mph, as will ALL the spitfires in the charts above. Haven't seen one for a Spitfire 21 myself, but will look for one. I'd expect it to be decent and better than earlier Spits.
Cheers.
Hey Spicmart,
re:"The late P-38 had hydraulically boosted aielerons which enabled it to outroll every other fighter. Impressive if one consider its size."
Do you mean above ~400 mph TAS? (350 IAS at 10,000 ft is ~400 mph TAS)
[edited for clarity and content] P-38L-1-LO test dated 10 June 1944. If this is with the aileron booster it appears to allow full deflection upto ~300 mph TAS at 10,000 ft? If you assume the booster allows full deflection upto ~Vmax and continue the slope line straight from the 300 mph TAS point, the line will intercept the 120°/sec line at about 460 mph TAS (395 mph IAS) at 10,000 ft. Either way the P-38 with boost begins to exceed all other aircraft at about 350 mph IAS at 10,000 ft, when compared to the lower chart from the NACA 868 report. (Did I figure this right?)
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Measuring rate of roll is difficult, it changes with altitude and also with how much force the pilot can exert, some tests specify the force applied, which doesn't guarantee the maximum rate of roll but does allow comparison to be more exact. There are also two factors how quickly it starts to roll and how fast it does at maximum.
It may have had a higher ultimate roll rate, but how long did it take to get to that rate?
The P-38 had a high mass-moment of inertia, compared t single engine fighters, which slowed the initial roll.
Measuring rate of roll is difficult, it changes with altitude and also with how much force the pilot can exert, some tests specify the force applied, which doesn't guarantee the maximum rate of roll but does allow comparison to be more exact. There are also two factors how quickly it starts to roll and how fast it does at maximum.
Well, yes. But sticking two engines in the wing does change calculations a little.I think that in general the initial rate or roll is higher the higher the aspect-ratio of the wing is. Or so I heard.
Well, yes. But sticking two engines in the wing does change calculations a little.
Spit Mk. 21 roll, don't mind the hand drawn 109F-4 line
Spit Mk. 21 roll, don't mind the hand drawn 109F-4 line
The late P-38 had hydraulically boosted aielerons which enabled it to outroll every other fighter. Impressive if one consider its size.
Now the Fw 190D-13 had them, too. It should roll even better as it is much smaller.
Any other fighter which featured those?
The Dornier Do 335 Pfeil: Flying the Arrow
A Bf 109 and an Fw 190 are not the same, they use the same digits in a different order.So the Mk 21 did not surpass the Fw 190.
This is more a fighter-bomber not suited for fighter vs. fighter combat.