Focke Wulf A4 Speed con vari armamenti

[Ospite Folgore]

On 9.2.43 Focke-Wulf issued a report entitled "Flugleistungen Fw 190 mit Abwurflasten." While the Fw 190 A-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

 

:adorazione: :adorazione:

[Gian Vito]

Ottimo lavoro!

 

Si tratta di dati sempre difficili da reperire; tempo addietro avevo scritto qualcosa sulla riduzione di velocità con carichi esterni, con solo pochi dati sui velivoli della seconda guerra mondiale. Riporterò tutto nel mio archivio!

[Ospite Folgore]

Si ho dovuto cercare molto a lungo nel forum dei cervelloni di 12 O'Clock High!