How about this has already been simulated in one FM and works very well.

It is not that hard to do.


I would like to see others repeat it too. It does not take any elaborate set up.

From level flight, pull back and let go. The FM will return to trim speed.....

It is that simple.

Just like the Spitfire in the game is immune to overstress damage, it is statically and dynamically stable.

Agreed.. Sadly, Crumpp is so vested in this 'story', that he will ignore these facts and simply double down on the 'story' and ignore all these facts as if they were never mentioned.

I see Crumpp's posting the phugoids and spirals on the Spitfire again (35th time?). So I'll just repeat what NACA leading WW2 aerodynamics test engineer - all fighter aircraft of the era which were tested displayed instability in the phugoid and spiral mode. Put the R.A.E. chart from the Hurricane testing next to the Spitfires and you'll appreciate the Spitfires stability in these modes.

And Crumpp, before you post it a perceived 36th time, can you please remove your wrong labels? A plane going into stall in the first cycle is not stable.

Absolutely, by careful flying, a skilled Spitfire pilot can match the precision found in a stable aircraft.

That is not the issue.

The issue is the Hurricane does not require such attention to achieve and hold a precise acceleration. The Hurricane is stable.

It's stick free behaviour.

What are you talking about???

The Hurricane abrupt turn as recorded by the NACA is stick fixed. The Spitfire abrupt turn as recorded by the NACA is stick fixed.

The RAE stability measurements for general stability characteristics are stick free.

In both the RAE and NACA measurements, the Spitfire was longitudinally unstable with unacceptable characteristics.

That is why they added the inertial elevator to fix the longitudinal instability.

What is the issue? Why is blatent fact so hard to understand?

All the smoke, mirrors, and baloney put out about "it is normal" and "all fighters of the day" acted like that is pure fantasy.

If there was not a problem, then they would not have fixed anything!!!

:rolleyes:

Answer the question JtD:

Why did they modify the aircraft with an inertial elevator?

Heres a question.

If they realised that they needed it for the MkV which no one disputes, why did they not come to the same conclusion for the Mk I in 1939?

It wasn't new tech.

And it has SFA to do with NACA, since they added Bob weigths to the MkV before NACA ever got there Spit V to test.

The Mk I recieved an inertial elevator in July of 1941.

Did it, what Mk I's were those then.

Mk I was out of service and MKII's and Mk V's in service then.

I know what your desperately using as your source for that claim, and its one of the hundreds of modifications listed in Morgan and Shacklady, which coincidentally were all the modifications that were applied to the MKV, which led to need of Bob weights due to CoG being changed, AFTER BoB.

Again i ask you, if it took the RAE 2 months do decide that they needed bob weights on the Vb, why 3 years for the Mk1 in your world?