Horton

[Crumpp]

Me 262 CG blah blah blah

The aerodynamic center moves under compressibility increasing the stability margin.

Two common methods of handling this are:

1. Add drag to slow the aircraft down below compressibility
2. If the CG is within limits<for that condition>, the aircraft will recover.

If you want to make the elevator effective enough to recover the aircraft, it must not violate the forward CG.

The forward CG limits defines the point you can raise the nose.

Under compressibility, behind the normal shock, the dynamic pressure is greatly reduced and the flow subsonic.

I am sure Mtt was aware of this fact.

[Crumpp]

What happenend to your reply, Tagert?

If the Germans fully understood swept wing theory..

Nobody fully understood swept wing theory until after the war. As the history notes, even Jones work in the United States was viewed with skeptism and far from mainstream.

Nobody fully understood the transonic and supersonic realms either.

German swept-wing wind-tunnel data dispelled U.S. doubts
regarding the validity of R. T. Jones’ theoretical work.

What the Germans were, is far ahead of anyone else during the war. Their research became the foundation others like Northrop built upon.

[ACE-OF-ACES]

Originally Posted by Crumpp

Nobody fully understood swept wing theory until after the war.

Bingo!

Now maybe tools will belive me?

[Crumpp]

Neither of which were done to take advantage of swept wing theory

That is not correct. It is impossible to argue that Mtt was not aware of swept wing theory.

By 1945 the entire German aircraft industry had a multitude of experimental swept wing aircraft and missile designs in a final realization phase. Also, a Me 262 had been retrofitted with a 35 degree arrow wing and was ready for first flight. A further (Me 262 HG II) version with 45 degrees sweepback was under final construction at the end of WW II.

The outer wings were swept to correct the cg.

Probably as result of the swept wing research and compressibility effects on the CG......

Mtt was obviously interested in adding futher sweep to the design.

[Crumpp]

While nobody fully understood swept wing theory, the Germans were light years ahead of anybody else.

In fact, Sir Sydney Camm, the designer of the Hurricane initially remarked, "Has anyone seen such a bloody useless" design concept upon seeing the German swept wing designs.

[ACE-OF-ACES]

Originally Posted by Crumpp

That is not correct.

That is your opinion and your welcome to it.. But I think Ill stick with what STORMBIRDS and Jenkins had to say on the subject. S!

[Crumpp]

That is your opinion

That is not my opinion Tagert. It is what is written in:

The Birth of Sweepback - Related Research at LFA-GermanyPeter G. Hamel∗

Given at:

AIAA Atmospheric Flight Mechanics Conference and Exhibit
11-14 August 2003, Austin, Texas

Would you like a paper from Boeing summing up the German contribution to aerodynamics during WWII? I am sure you will hate it and be very disappointed.

You do know the father of modern fluid dynamics was not only German, there are pictures of him with von Kármán in the article.

Do you have a clue who Theodore von Kármán is and his role during the war?

The leading academics in aeronautical sciences were for the most part, colleagues and all knew each other before the war. Theodore von Kármán, the leading US scientist in aerodynamics, was a student of Ludwig Prandtl.

http://en.wikipedia.org/wiki/Ludwig_Prandtl

[ACE-OF-ACES]

Originally Posted by Crumpp

That is not my opinion

Well I don't know what else to tell you Crump

Other than I choose to take STORMBIRDS and Jenkins statements over yours with regards to the reasons why the Me262 wings were swept..

Why? Well I consider them to be more of an expert on the topic than you..

Please don't take it personal!

Which should be understandable when you consider the fact that Dennis Jenkins has written more aviation books than most people own or have read, and that the folks at STORMBIRDS clearly did their homework during the process of building reproductions of the Me262, that were so good that messerschmitt gave them continuation serial numbers

It just makes sense to go with what they said over what you said

Please don't take it personal!

But look at the bright side..

I did agree with what you had to say with regards to the Germans fully understanding swept wing theory during the war, when you said

Originally Posted by Crumpp

Nobody fully understood swept wing theory until after the war.

But as for the details as to the reason the wing was swept on the Me262, Ill have to stick with STORMBIRDS and Jenkins

S!