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- - British FM killing the fun of the game for allied pilots. (http://forum.fulqrumpublishing.com/showthread.php?t=33942)

Quote:

Originally Posted by JtD (Post 456541)

Which requirements were there for long period dynamic longitudinal stability?

The requirements are set out in NACA Report No.755. By R. R. Gilruth

I posted a link to it a couple of pages back.

EDIT:http://aerade.cranfield.ac.uk/ara/19...report-755.pdf

Quote:

Originally Posted by Crumpp (Post 456512)

While many WWII fighters were unstable in very specific conditions such as in climb power with a specific speed range or landing configuration.... most were stable and met the requirements.

It is was very rare for a design to be unacceptable over the range of the envelope such as the Spitfire.

So, suddenly the Spitfire was unacceptable over the range of the envelope? I take it this includes stalling behaviour:
http://i91.photobucket.com/albums/k3...-page-003a.jpg

http://i91.photobucket.com/albums/k3...-page-004a.jpg

And because the Spitfire was so unacceptable over the range of the envelope NACA, and the engineer who compiled the report, later singled it out as being an example of a badly designed fighter that made all the rest look good:

http://i91.photobucket.com/albums/k3...-page-001a.jpg

http://i91.photobucket.com/albums/k3...-page-001a.jpg

Presumably these bad flight characteristics over the entire envelope meant that the poor sods called pilots hated flying the thing and couldn't wait to get out of the cockpit, shaking and drenched in sweat.

Quote:

Originally Posted by Crumpp (Post 456512)

It is patently false as a generalization.

Totally agree.

Quote:

Originally Posted by winny (Post 456549)

The requirements are set out in NACA Report No.755. By R. R. Gilruth

There's nothing about long period dynamic longitudinal stability in there, hence my question.

Quote:

So, suddenly the Spitfire was unacceptable over the range of the envelope?

:rolleyes:

http://img10.imageshack.us/img10/561...estability.jpg

But once again you have to adress the question. Where does it say it was a danger, a major problem or even a minor problem?

Quote:

There's nothing about long period dynamic longitudinal stability in there, hence my question.

Right, there are not a "big deal" because they can be controlled by the pilot.

Hence the reason why inertial weights are added to increase his feel and ability to control those oscillations.

Right now, in the GAME, there is nothing for a Spitfire Pilot to control. The instability does not exist in the GAME.

Quote:

Longitudinally, the aircraft is stable with centre of gravity forward, but is unstable with centre of gravity normal and aft with engine 'OFF' and 'ON'.

http://img705.imageshack.us/img705/4...yexplained.jpg

http://www.spitfireperformance.com/k9787-fuel.html

In the game, they are longitudinally stable both static and dynamic:

http://img692.imageshack.us/img692/4...ctlongstab.jpg

Quote:

You flying in RL, i don't have to say, in RL you have much more feedback from the plane, plus you have 1:1 sized, smooth force feedback stick You feel the plane movement, shaking, the forces on the seat, etc.

You still trim the plane in the game without all the feedback a real pilot gets and you don't need FF for trim!

:grin:

Quote:

Where does it say it was a danger, a major problem or even a minor problem?

This has been covered over and over. You know the answer and can read the POH.

Would you mind to continue the stability discussion in this thread:

http://forum.1cpublishing.eu/showthr...=33245&page=94

so we could continue discussing the general performance of the spit in the recent patch that is speed, overheating and climb?

Some people are interested in these issues.

Quote:

Originally Posted by Crumpp (Post 456565)

:rolleyes:

Facepalm!!!!!

Quote:

Originally Posted by Crumpp (Post 456568)

and you don't need FF for trim!

:grin:

Double facepalm!!!! practically the primary function of trim is to aleviate the pilot from holding constant stick force thereby remedying fatigue....how does this not involve feedback?

Quote:

Originally Posted by Crumpp (Post 456568)

You still trim the plane in the game without all the feedback a real pilot gets and you don't need FF for trim!

:grin:

Basically you right, but I'm sure, you cannot trim the plane as fast and accurate like in RL. When i fly with bombers, it is difficult to set the level flight. I trim the plane, and look whether moving or not. If so, I trim again, and look again, and so on. Disturbing that I don't feel the movement of the plane, or the stick forces.

And the trimm is not required such a precise handing, like the stick when you flying on the edge.