Here is some good infomation on flying wings too.....
Quote:
|
You are saying that you know more about the Me262 development than..
|
Not at all. I am saying what the AIAA relates from the scientist and engineers involved.
I am also demonstrating the benefits as per what is now accepted performance calculations for swept wing aircraft. You know, the stuff Von Karman talks about in his letter?
Quote:
|
They are ahead of us on a few items which I will mention. The Germans have been doing extensive work on high speed aerodynamics. This has led to one very important discovery. Sweepback or sweepforward (sic) has a very large effect on critical Mach No.
|
http://forum.1cpublishing.eu/showpos...&postcount=155
I am saying:
You are focusing on minutiae and twisting it fit your agenda.
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?