Doc perfos A-8

[JG13-Helix]

Traduction du document sur les perfos de l'A-8:

http://www.wwiiaircraftperformance.org/ ... 5-3-44.pdf

Bonne lecture.


 Short term options for a performance increase of the Fw 190 with 801 D through engine modifications based on the status of March 1944. 1.)Explanations for the chart: Altitude performance 801 D and F (page 2 and annex)2.)Performance gains and conditions of usage for engine performance increases for various operational cases for the Fw 190 A)as fighter bomber (page 3) B)as tactical support (page 4) C)as fighter (page 4)
 I. boost increase
II. GM I (Basis for engine data: internal operating instruction BMW JB Nr. 3064)
  
1.)Explanations for the chart: "Altitude performance 801 D and F".  (chart see annex)    Blue line:Normal 801 D, climb and combat power Red dotted line:801 D take off and emergency power.
The possible hp-gains resulting from the boost increase from 1.42 ata to 1.58 ata in first charger gear and 1.65 ata in second charger gear are the red areas. Green dotted line:This line shows a power boost resulting from the methanol injection, which was planned previously but not realized by BMW for the 801 D. Yellow and brown line:Climb and combat, and takeoff  and emergency power for the 801 F engine.   A comparative assessment of the plots shows that the performance gain of the 801 D through the increased boost is the most remarkable, but that the 801 F engine still has to be required with the highest level of urgency.
This is even more so, since BMW intents a power increase similar to the one on the D-engine through increased boost and methanol injection for the F-engine (letter of BMW to Focke-Wulf dated 8.2.44). 
2.)Performance gains and conditions of usage for engine performance increases for various operational cases for the Fw 190   Operational case A. Long range fighter bomber  Boost increase from 1.42 ata to 1.65 ata
Simultaneously C3-injection 65 l/min   (Usage of increased emergency power prohibited in second charger gear)   Usage:3 x 10 min per mission with 10 min cooldown at combat power.   Performance gain:(see shaded areas in plot below)   Availability:to be installed continuously by A.A.. Parts available.      B. Tactical support   Same as longe range fighter bomber!      C. Fighter I.Boost increase  Values not yet approved by Rechlin at the moment.  Boost increase from 1.42 to   1.58 in first charger gear
1.65 in second charger gear    No C3 injection!  Usage:   At all altitudes in level flight and climbs 10 min permitted. In climbs limit use if possible.  Performance gain:  a)Speed:  b)Climb performance:   The considerable total gain (shaded area) comes from 2 factors:   a)from 2400 to 2700 revolutions   b)at 2700 increased boost with 10 min usage (not for climbs from sea level to ceiling!)  Availability:   Venting tubes and blinds available from BMW from March onwards II.GM I  Usage about 20 min at altitudes above 8000 m at 80 gr/s.   a) Climb gain:   b) Speed gain:  Availability:   GM 1-installation possible from Fw 190 A-8 onwards. Factory supply starting April 1944, limited to Ago
Supply of GM 1 kits still open, negotiations RLM - Braunschweig
 

[JG27_Belly]

Hello,

Avez vous besoin de connaitre des info spécifiques et/ou complémentaires ?

[JG13-Wulf]

Si tu trouves des doc officielles sur l'utilisation du GM1 ou du MW50 je suis preneur ^^
Mais n'importe quoi d'officiel est valable à mon avis :p

[JG27_Belly]

Dans le topic des performances du Fw190A-8, voici une synthèse (source "Kurt Tank: Focke-Wulf's designer and test pilot" de Wolfgang Wagner)

Fw190A-8/R2 performances
 
Note: Fw190A-8/R1: 4 MG 151/20 cannons installed in under wing blisters. The A-8/R2 replaced the outer wing 20 mm cannon with a 30 mm MK 108 cannon.
 
Engine BMW 801D2, output 1272 kW (1730 hp)
Weight (empty+armor) = 2743+157=2900kg
Fuel* +Oil + Crew + Load** = 472 + 50 + 80 +848 = 1450 kg
So take off weight = 4350kg
 
(*) fuselage tank = 233+292 liter + supplemental tank 115 liter (long range or MW50) = 640liter or 472kg
(**) 2xMk108 & 2x55 rounds + 2xMG151 & 2x250 rounds + 2xMG131 & 2x475 rounds + MW50 system, empty long range + equipment = (176+65) + (84+100) + (59+81) + 50 +233 =848kg
 
Max speed 635km/h at 6200m (560km/h at sea level, 2700rpm)
Cruise speed 585km/h at 6200m (500km/h at sea level, 2300rpm)
Climb rate 10m/s at 5500m (13m/s at sea level)
Service ceiling 9600m

Range 615km (at 300m and 2300rpm), max flight time 1.20h
Range 695km (at 5000m and 2300rpm), max flight time 1.32h
Range 985km (at 5000m and 2100rpm), max flight time 2.02h
 
Take off run 500m (take off run to 20m 720m)
Landing run 500m
Landing speed 168km/h

[JG13-Wulf]

Tu aurais un lien vers cette source Belly ? :p

[JG13-Zvezdoy]

vi, mais ce sont des versions R (Rüstsatz), donc on peut dire que c'est mort pour DCS
Sur le site avialogs y a des trucs intéressants :
C'est en allemand !

http://www.avialogs.com/index.php/aircr ... -801d.html

la clé : "D. (Luft) T. 2190 A-8" a été donnée sur le forum DCS !
La finalité est de savoir si ces documents sont dignes de foi ou pas !
 

[JG27_Belly]

La source est un livre:



En regardant un peu plus près, la source donnée par Zvezdoy donne à peu près les mêmes valeurs (quelques sauts de lignes sont à noter dans certains tableaux pour retrouver les valeurs).
Pour faire simple un même ordre de grandeurs est là entre ces 2 sources.

[JG13-Helix]

Source: Osprey, Production Line to frontline, FW 190, Malcom Lowe.

In the Fw 190A-8, two self-sealing main fuel tanks were carried in the lower fuselage in a special compartment beneath the cockpit, the forward one of 232 litres, the rearward one of 292 litres. A 300-litre external drop tank was very often carried on the Fw 190A-8 by the underfuselage ET 501 tores rack. In addition, an auxiliary fuel tank of 115 litres could be installed as necessary behind the cockpit in a space otherwise used for the fuel tank for GM-1 nitrous oxide or MW-50 methanol-water boost for the engine when fitted. C3 petrol, nominally of 96 octane, was recommended by the manufacturer to fuel the engine.

J'ai pas mal de doc en format pdf, en anglais, si cela intéresse l'un d'entres vous. 

[JG13-Wulf]

Moi ca m'intéresse, mais a mon avis, cela ne sera jamais implémenté.

[JG13-Helix]

Lien avec quelques livres sur le FW190 ainsi que le Bf109 (pas grand chose):
https://drive.google.com/open?id=1nXG5M ... JixJAHsmzI

La doc charge sur google drive a cet instant.
Non, cela ne sera pas implémenté, c'est plus pour la culture générale.
J'aimerai que DCS nous livre un appareil qui fonctionne, pas un gros veau qui va rester en EA pendant 10 ans.