"Para 54 gives the structural limitation of 500mph."
(Glider quote from the Meteor Tactical Trials CFE Report)
At the time of writing the evaluation report the Meteor was still very much in a state of flux in terms of its development. The report makes reference to fixes which were then in the pipeline. The problem with limiting speed early on was with the nacelles. New units were retrofitted to all F III's and this had a dramatic effect on the aircraft's performance, which brought late F IIIs up to 490 mph. See below:
AvH_1%_V4/167_GB_Meteor_Mk_III_EE456_Lighted - AvHistory.org
www.meteorflight.com - The Gloster Meteor F4
Feedback from the Me 262 Project.
Me 262 PROJECT TECHNICAL DATA
(Glider quote from the Meteor Tactical Trials CFE Report)
At the time of writing the evaluation report the Meteor was still very much in a state of flux in terms of its development. The report makes reference to fixes which were then in the pipeline. The problem with limiting speed early on was with the nacelles. New units were retrofitted to all F III's and this had a dramatic effect on the aircraft's performance, which brought late F IIIs up to 490 mph. See below:
AvH_1%_V4/167_GB_Meteor_Mk_III_EE456_Lighted - AvHistory.org
The Meteor F.Mk III, the second and last mark to see operational service during World War II, had increased fuel capacity and a sliding bubble canopy in place of the sideways-opening hood of the Meteor Mk.l. Fifteen F.Mk IIIs were completed with Welland engines and 195 with Derwents, some in lengthened engine nacelles. The Derwent engines in the Mk III produced 2000 lbs of thrust improving the performance over the original Mk I Meteors.
Flight tests demonstrated that the original short nacelles, which extended fore and aft of the wing, contributed heavily to compressibility buffeting at high speed. New, longer nacelles not only cured some of the compressibility problems but added 120 km/h (75 mph) at altitude, even without upgraded powerplants.
The last batch of Meteor F 3s featured the longer nacelles while other F 3s were retrofitted in the field with the new nacelles.
Flight tests demonstrated that the original short nacelles, which extended fore and aft of the wing, contributed heavily to compressibility buffeting at high speed. New, longer nacelles not only cured some of the compressibility problems but added 120 km/h (75 mph) at altitude, even without upgraded powerplants.
The last batch of Meteor F 3s featured the longer nacelles while other F 3s were retrofitted in the field with the new nacelles.
www.meteorflight.com - The Gloster Meteor F4
Breaking Records
In both the F. Mk 1 III Meteors the Derwent engines were housed in short stubby nacelles, it was discovered though that extending them both in front and behind the wing improved the airflow and greatly reduced drag which increased sea level speed by almost 60 mph. It was this in conjunction with the new and much more powerful Rolls Royce Derwent V that led to thoughts of capturing the world air speed record set by Germany in 1939 in addition to forming the basis of the Meteor F4.
The record attempt was made with two late production F3's, EE454 EE455 which were taken from the production line and brought up to F4 standard less their radio masts and with ballast in place of armament and the cannon ports faired over. Both aircraft were given a special high gloss paint finish with EE454 retaining its day fighter camouflage scheme while EE455 was painted overall yellow.
It was EE454... that raised the record on the 7th November 1945 when Group Capt Hugh Wilson (Formerly of 616 Squadron) flew at a speed of 606.38 mph although Eric Greenwood was only marginally slower in EE455 at 603 mph.
They both had full 43 ft. length F III wings. So the F III's speed limitations were overcome relatively easily. They got the basic F III airframe up to 606 mph. Then there wasn't a 500 mph structural limitation. .In both the F. Mk 1 III Meteors the Derwent engines were housed in short stubby nacelles, it was discovered though that extending them both in front and behind the wing improved the airflow and greatly reduced drag which increased sea level speed by almost 60 mph. It was this in conjunction with the new and much more powerful Rolls Royce Derwent V that led to thoughts of capturing the world air speed record set by Germany in 1939 in addition to forming the basis of the Meteor F4.
The record attempt was made with two late production F3's, EE454 EE455 which were taken from the production line and brought up to F4 standard less their radio masts and with ballast in place of armament and the cannon ports faired over. Both aircraft were given a special high gloss paint finish with EE454 retaining its day fighter camouflage scheme while EE455 was painted overall yellow.
It was EE454... that raised the record on the 7th November 1945 when Group Capt Hugh Wilson (Formerly of 616 Squadron) flew at a speed of 606.38 mph although Eric Greenwood was only marginally slower in EE455 at 603 mph.
The prototype F Mk.IV, EE360 first flew on the 17th July 1945 and a total of 535 were built for the RAF including 48 by Armstrong Whitworth. The F4 was exported in significant numbers with 100 going to Argentina fifty of these being refurbished ex RAF machines with the remainder new-built by Gloster.
The first production Meteor F4's were built with the same 43ft wing as the Meteor F3. This proved to be unsatisfactory however as it was not strong enough to absorb the additional stresses of flight at higher speeds and was a factor in some early accidents. To solve this problem the wing of the F4 was clipped to 37ft 2in which reduced the wing area by 6% and improved the rate of role to 80 degrees per second. The disadvantage of the clipping the wings was an increase in take-off and landing speeds and increased wing loading. There are no clear records as to the number of F4's which reached the RAF with the long span wings although it is likely that they would all have been modified in service. As described in the air speed records the aircraft used by the high speed flight did not have clipped wings, although they also would probably been modified later when they were transferred to operational squadrons.
It's conceded that for combat at high transonic speeds, the wing had to be clipped, but the Me 262 airframe could not even think of going there. See below:The first production Meteor F4's were built with the same 43ft wing as the Meteor F3. This proved to be unsatisfactory however as it was not strong enough to absorb the additional stresses of flight at higher speeds and was a factor in some early accidents. To solve this problem the wing of the F4 was clipped to 37ft 2in which reduced the wing area by 6% and improved the rate of role to 80 degrees per second. The disadvantage of the clipping the wings was an increase in take-off and landing speeds and increased wing loading. There are no clear records as to the number of F4's which reached the RAF with the long span wings although it is likely that they would all have been modified in service. As described in the air speed records the aircraft used by the high speed flight did not have clipped wings, although they also would probably been modified later when they were transferred to operational squadrons.
Feedback from the Me 262 Project.
Me 262 PROJECT TECHNICAL DATA
...The Jumo-powered Me 262 was capable of level flight speeds in excess of 540 miles per hour at altitude; a trait that made it all but invulnerable to Allied escort fighters.
Higher airspeeds were recorded under certain circumstances but, in general, compressibility-related aerodynamic factors prevented the airframe from ever pushing into the high transonic range.
Postwar tests in the West confirmed that at very high airspeeds airframe vibration levels and buffeting grow increasingly worse until the jet enters into a shallow dive and becomes all but completely uncontrollable. Recently revealed Soviet documents demonstrate that this was also a major finding in Red Air Force flight testing of the Me 262.
Higher airspeeds were recorded under certain circumstances but, in general, compressibility-related aerodynamic factors prevented the airframe from ever pushing into the high transonic range.
Postwar tests in the West confirmed that at very high airspeeds airframe vibration levels and buffeting grow increasingly worse until the jet enters into a shallow dive and becomes all but completely uncontrollable. Recently revealed Soviet documents demonstrate that this was also a major finding in Red Air Force flight testing of the Me 262.
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