Topspeed wrote:phylo_roadking wrote:Problem is....this facility wasn't availble to Motke...Bill Sweetman recognises that Me 262 had officially clocked 624 mph with a souped up canopy
No but the fact is that his power was doubled ( nearly tribled ) when he hit the plane into deep dive...and accelerated rapidly into mach 1+ at very high altitude.
It was dicovered already in the 1920s that a jet engine can go supersonic....unlike a prop engine. Underdeveloped Jumo seized and luckily speed decelerated rapidly so that the trans sonic buffeting was kept minimum in both ways.
"...fact that his power was doubled (nearly trebled) when he hit the plane into deep dive....."
SInce when did engine power increase when an aircraft starts diving?
"...and accelerated rapidly into Mach 1+ at very high altitude...."
There remains no evidence at all that his aircraft reached Mach 1.
He wasn't at very high altitude, even by the standards of the time.
"...It was dicovered already in the 1920s that a jet engine can go supersonic"
That discovery came later!
"...Underdeveloped Jumo seized and luckily speed decelerated rapidly..."
Engines did not seize. They flamed out. There is a huge difference which you do not appear to understand.
They flamed out long before the aircraft could get to M1.00, due to the speed of the airflow at the engine intakes.
As you have been told numerous times the engines have to have the air entering the compressor stage to be moving at subsonic speed.
Speed does not decelererate.
Aircraft can decelerate, and that deceleration is measured in terms of a rate of change of speed.
Of course the aircraft decelerated rapidly. How many times have we told you that?
Once the engines flamed out, gravity alone was insufficient to overcome the high transonic drag - hence the aircraft slowing!
Wartime Spitfires did not have a machmeter. Highest speed achieved in a dive in a postwar test, with an aircraft stripped of weight (ie guns etc) and with additional streamlining (ie all holes covered, no pitot tube etc) was not as high as M0.92 - it was lower - M0.89, and a Spitfire in combat trim would have been slower still - more like M0.84 or thereabouts.
Readers will note that even now Topspeed continues to demonstrate lack of basic understanding of aerodynamics, and still has not offered any evidence at all to support his claim, nor has he offered any evidence at all to disprove the enormous weight of evidence given by many posters that shows that the Me 262 could not have gone supersonic.
