Horton

[Crumpp]

Dr. Theodor von Kármán holds an important position among the contributors to aerodynamic theory, particularly in the area of supersonic flight. Known as “the father of supersonic flight,” he made major contributions to aviation and space technology, theoretical aerodynamics, and the application of theory to improve aircraft performance. He also helped develop the use of rocketry for creating weapons of defense.

By the age of 22, von Kármán had graduated from Royal Joseph University in Hungary with a mechanical engineering degree and highest honors. He enrolled in the advanced study of mechanical engineering after serving his mandatory military service and received his doctorate under the tutelage of the famous aerodynamicist, Ludwig Prandtl.

http://www.centennialofflight.gov/es...arman/TH21.htm

[Crumpp]

ACE-OF-ACES

Of course, there is evidence to support all opinions on any subject.

http://www.ufodigest.com/

Why would they go to all the trouble of sweeping the inner wings forward 18 degree is they knew in advance it would not increase the critical Mach number?

Our critical Mach number is raised by reciprocal of the cosine of the angle of sweep. So for 18 degrees of sweep we see a 1.05146 increase to critical mach.

So mach limit of Mach .8 becomes a new limit of .84.

Now at sea level that is represents a 30mph increase in speed!

Now the drag reduction is proportional to cos^2<angle of sweep>

Or a 9.5% reduction in drag.....

Not a bad call on the part of Mtt to add 18 degrees sweep based off their advanced knowledge of swept wing theory. By keeping the sweep moderate, they certainly avioded all the stability and control issues found with sweep angles and engine nacelles.

What is your opinion based on again?

[ACE-OF-ACES]

So what part of we will have to agree to disagree are you struggling with?

[Crumpp]

Why would they go to all the trouble of sweeping the inner wings forward 18 degree is they knew in advance it would not increase the critical Mach number?

So what part of we will have to agree to disagree are you struggling with?

I am confused on just what your opinion is now.

Any engineer or someone familiar with aircraft performance can easily tell you it does increase the critical mach number and the top speed.

What are we agreeing to disagree on?

[ACE-OF-ACES]

Originally Posted by Crumpp

I am confused on just what your opinion is now.

Agreed in that you are all over the place on this topic..

To sum it up

• The outer wings were swept to correct the cg.

• The inner wings were swept to correct the airflow separation.

And note..

Those are NOT my opinions!

I am simply agreeing with the folks at STORMBIRDS and Jenkins who said those two things

Hope that helps!

S!

[Crumpp]

I am simply agreeing with the folks at STORMBIRDS and Jenkins who said those two things

OK....

I guess Stormbirds never picked up a calculator and I am sure you are focusing on minutiae taking Jenkins out of context to fit your agenda.

In otherwords, if someone asked Jenkins if the ME-262 benefited from 18 degrees of sweep angle, he would pick up a calculator and say:

Our critical Mach number is raised by reciprocal of the cosine of the angle of sweep. So for 18 degrees of sweep we see a 1.05146 increase to critical mach.

So mach limit of Mach .8 becomes a new limit of .84.

Now at sea level that is represents a 30mph increase in speed!

Now the drag reduction is proportional to cos^2<angle of sweep>

Or a 9.5% reduction in drag.....

Not a bad call on the part of Mtt to add 18 degrees sweep based off their advanced knowledge of swept wing theory. By keeping the sweep moderate, they certainly avoided all the stability and control issues found with sweep angles and engine nacelles.

What is your opinion based on again?

[bongodriver]

Amateurs...they should have gone for 19 degrees.

[ACE-OF-ACES]

Originally Posted by Crumpp

OK....

I guess Stormbirds never picked up a calculator and I am sure you are focusing on minutiae taking Jenkins out of context to fit your agenda.

In otherwords, if someone asked Jenkins if the ME-262 benefited from 18 degrees of sweep angle, he would pick up a calculator and say:

Our critical Mach number is raised by reciprocal of the cosine of the angle of sweep. So for 18 degrees of sweep we see a 1.05146 increase to critical mach.

So mach limit of Mach .8 becomes a new limit of .84.

Now at sea level that is represents a 30mph increase in speed!

Now the drag reduction is proportional to cos^2<angle of sweep>

Or a 9.5% reduction in drag.....

Not a bad call on the part of Mtt to add 18 degrees sweep based off their advanced knowledge of swept wing theory. By keeping the sweep moderate, they certainly avoided all the stability and control issues found with sweep angles and engine nacelles.

If I didn't know better..

I would get the impression that your claiming to know more about the Me262 development than the folks over at STORMBIRDS and Jenkins..

If so, than that is another thing we will have to agree to disagree on!

S!