Originally Posted by
KenV
Channel 2 has set himself up as an expert on area rule. Can this "expert" state how area rule is implemented on the F-22? Or will he continue to ignore the question?
I do not claim to be an expert on area ruling. But these two (2) concepts are fairly straight-forward.
1) The F-22 is 62-foot long. The F-35A is 50.5-foot long. The F-22 is 11.5 foot longer. The F-22 has a 44.5-foot wide wing span. The F-35C has a 43-foot wide wing span.
So which aircraft most closely conforms to the Sears-Haack body? The answer mostly explains why the F-35C struggles to accelerate in the transonic region. As for the F-35A, its wingspan is 35-foot. But the Sears--Haack equation utilizes radius, not diameter so the 9.5-foot difference is actually 4.75-foot. The F-22 is 11.5 foot longer with only a 4.75-foot R differential.
And here is the devastating part. Negate the wings on both aircraft and redo the equation.
One of them ends up looking almost identical to a Greyhound bus. Guess which one?
2) Internal volume is a rusty double-edged sword when it comes to area ruling. Remember how the F-35 fanboys love to brag about, "all that enormous internal volume?" Well...as it turns out...it's impossible to area rule a 50.5-foot long aircraft with that kind of volume.
Here is the bottom line. The F-35A and C both carry the same internal cross sectional volume of the F-35B. The 'B' needed a lift fan, but from the cross section distribution point of view, it was a tragic mistake for the F-35A and C to have space for a ghost fan that is nearly as big as an Embraer 190 engine
right behind the cockpit.
All My Best, Gents!