Several Swedish aircraft currently appear to be modeled with lower maximum engine output than specified in Swedish documentation and factory blueprints. The differences are generally small, but they affect historical accuracy across multiple aircraft rather than being isolated cases.
This post has four parts:
1. Propeller Driven Aircraft:
2. Jet Driven Aircraft:
3. Sources, Overview Blueprints + Litterature:
4. Bug Reports:
1. Propeller Driven Aircraft:
| Aircraft | Current | Historical | Difference |
|---|---|---|---|
| B17A 1x (STWC3) | 1,050 hp | 1,065 hp | +15 hp (+1.4%) |
| B18A 2x (STWC3) | 1,050 hp | 1,065 hp | +30 hp total (+1.43%) |
| J22A 1x (STWC3) | 1,050 hp | 1,065 hp | +15 hp (+1.4%) |
| J22B 1x (STWC3) | 1,050 hp | 1,065 hp | +15 hp (+1.4%) |
| J21A-2 1x (DB 605B) | 1,450 hp | 1,475 hp | +25 hp (+1.7%) |
The B18B, T18B and T18B(57) all have 1,460 hp for the “DB 605B”
This would result in +1.03% total engine power (2920 → 2950 hp)
Top speed: 570 km/h → 571–572 km/h
Climb: 11.5 m/s → 11.6 m/s
Takeoff run: 400 m → 396–397 m
Service ceiling: 10,000 m → 10,050–10,100 m
Turn time: 27 s → 26.9–26.8 s
The J21A-2 (And likely the J21A-1, A21A-3, since they all used the DB 605B aswell) would gain +1.7% of total thrust. Not alot just a marginal boost.
2. Jet Driven Aircraft:
| Aircraft | Current | Historical | Difference |
|---|---|---|---|
| J21R 1x (RM1 / DH Goblin 2) | 1,290 kp | 1,360 kp | +70 kp (+5.4% Added kgf) |
| A21RB 1x (RM1A / DH Goblin 3) | 1,420 kp | 1,500 kp | +80 kp (+5.6% Added kgf) |
The J21R with +5.4% Added kgf and A21RB with +5.6% Added kgf. They are the next most viable changes that can be made.
J21R: Fix Results
+5.4% kgf
Top speed: 799 km/h → 804–812 km/h
Climb: 21.0 m/s → 22.0–22.3 m/s
A21RB: Fix Results
+5.6% kgf
Top speed: 850 km/h → 855–865 km/h
Climb: 24.5 m/s → 25.8–26.2 m/s
Sources, Overview Blueprints + Litterature:
“STWC3” is a Swedish-Designed improvement of the “Pratt & Whitney, 14cyl. Twin-Wasp” that was used on the (B17A, B18A, J22A, J22B) that put out 1065 hp
"Det bevingade verket" - "Väsentliga områden inom flygsystem" - page. 235
4. Bug Reports:
SFA STWC-3 Too low Horsepower (Rejected)
Now i made a Bug report for the STWC3 already but it was shut down due to being within the acceptable error margin.
So i wont try to argue with that further seeing as it was a dev decision. Wont get anywhere with that.
J 21A-2 + J21RB Incorrect Power Output: (On the way)
J 21R Incorrect Engine Output (Open)
J21RB Incorrect Engine Output (Open)
