[George Hopp]

On 9.2.43 Focke-Wulf issued a report entitled "Flugleistungen Fw 190 mit Abwurflasten." While the Fw 190A-4 is not mentioned as such, the two a/c mentioned by W.Nr. are A-4s.

The first part of the report gives calculated values for the a/c in various guises.
I. All values are for the Fw 190 at Climb and Combat setting (2400rpm). With wing area of 18.3 square meters. Surfaces filled, sprayed, and polished. Internal supercharger intake. Adjustable cooling exit flaps. Narrow (enge) cowling.

Flying weight: 3850kg.
Weapons: 2xMG17 + 2xMG 151
0km - 550kph
5.7km - 646kph

Flying weight: 4100kg
Weapons: 2xMG17 + 2xMG 151 + 2xMG FF
0km - 544kph
5.7km - 636kph

Flying weight: 4200kg
Attachment: ETC 501
Weapons: as above
0km - 531kph
5.7km - 615kph

Flying weight: 4400kg
Attachment: ETC 501
Ordnance: SC 250
Weapons: as above
0km - 505kph
5.7km - 584kph

Flying weight: 4650kg
Attachment: ETC 501
Ordnance: SC 500
Weapons: as above
0km - 492kph
5.7km - 563kph

Flying weight: 4400kg
Attachment: ETC 501
Ordnance: 300l drop tank (full)
Weapons: as above
0km - 501kph
5.7km - 576kph

Flying weight: 4200kg
Attachment: ETC 501 + ER 4
Weapons: as above
0km - 522kph
5.7km - 604kph

Flying weight: 4400kg
Attachment: ETC 501 + ER 4
Weapons: as above
0km - 510kph
5.7km - 589kph

II. A/c as for I. But with underwing drop tanks.

Flying weight: 3850kg
Weapons: 2xMG17 + MG151
0km - 550kph
5.7km - 646kph

Flying weight: 4000kg
Attachment: ETC 501 + 2 streamlined Ju 87 drop tank holders
Ordnance: two 300l drop tanks (empty)
Weapons: 2xMG151
0km - 467kph
5.7km - 536kph

Flying weight: 4460kg
Attachment: as above
Ordnance: two 300l drop tanks (full)
Weapons: as above
0km - 464kph
5.7km - 528kph

Flying weight: 4250kg
Attachment: as above
Ordnance: SC 250 + two 300l drop tanks (empty)
Weapons: as above
0km - 450kph
5.7km - 510kph

Flying weight: 4500kg
Attachment: as above
Ordnance: SC 500 + two 300l drop tanks (empty)
Weapons: as above
0km - 440kph
5.7km - 493kph

Flying weight: 4000kg
Attachment: as above
Ordnance: ER 4 + two 300l drop tanks (empty)
Weapons: as above
0km - 462kph
5.7km - 529kph

Flying weight: 4200kg
Attachment: as above
Ordnance: ER 4 + Four SC 50 + two 300l drop tanks (empty)
Weapons: as above
0km - 453kph
5.7km - 518kph
The calculations for this ordnance load are uncertain. The actual speed could be between 5-10kph faster.

III. Test flown in W.Nr. 619 (Possibly an A-4/U3). Flown by Flugabteilung Wensendorf.
Flown at 0km, and Climb and Combat power (2400rpm). Internal supercharger intake. 2 x MG 17 + 2 x MG 151. Non-adjustable cooling flaps (Kiemen). Wide (weite) engine cowling.

Test No. 1 on 4.11.42.
With wheel doors - 3670kg - 517kph
With wheel fairings - 3670kg - 512kph
With ETC 501 - 3720kg - 510kph
With ETC 501 + ER 4 - 3797kg - 499kph
With ETC 501 + ER 4 + four SC 50 - 3997kg - 471kph

Test No. 2 on 11.1.43.
With wheel doors - - 517kph
With wheel fairings - - 513kph
With ETC 501 - 3880kg - 504kph
With ETC 501 + SC 250 - - 490kph
With ETC 501 + SC 500 - 4380km - 485kph
With ETC 501 + ER 4 - - 498kph
With ETC 501 + ER 4 + four SC 50 - - 471kph

IV. Test flown in W.Nr. 669 (A-4/U8) on 11.1.43. Flown by Flugabteilung Wensendorf.
Info as for W.Nr. 619, but with narrow cowling.
With ETC 501 + 2 streamlined Ju 87 drop tank holders - 3756kg - 471kph
With ETC 501 + 2 streamlined Ju 87 drop tank holders + two 300l drop tanks (full) - 4260kg - 456kph
With ETC 501 + SC 250 + 2 streamlined Ju 87 drop tank holders + two 300l drop tanks (full) - 4510kg - 445kph
Sorry that it's not really very exciting material, but it should give you an idea of Fw 190 speed losses with various types of ordnance.
George