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George_McKee
09-03-2005, 04:11 AM
Hi everybody ,

I am trying to learn to fly the Buffalo Mk I but I got some problems with the engine management.
It happens and I have the fly manual of the real airplane and I tried to fly by using the engine settings that are described in the manual. I had no luck, I got the impression that the airplane is underpowered (I just couldn€t get things right)
I am wondering if the airplane has been modelled properly in the game and if not is it going to be fixed?
Below I submit the description of the settings from the manual please try them and let me know what do you think.(If anybody wants the manual let me know)

CLIMBING
11. During all climbs careful check should be kept of cylinder head temperatures. Maximum permissible head
temperature is 260º for 5 minutes. The best climbing speed is 145 m.p.h. with boost and r.p.m. as follows:
(Also see Para. 26).
Height Boost R.P.M. Blower Mixture
Sea Level 43.5 2350 (3 min. only) Low (M) Full Rich
1000 ft. to 10000 ft. Maintain 35.5 in. Hg. 2300 Low (M) Full Rich
10000 ft. to 17000 ft. Maintain 33.5 in. Hg. 2300 High (S) Full Rich
17000 ft. and upwards Full Throttle 2300 High (S) Full Rich
Reduce climbing speed be 3 m.p.h. for every 2000 ft. above 5000 ft.
Note: - The above engine conditions apply to climb ONLY and in any case must not exceed 15 min.

ENGINE DATA - NOTES ON THE CYCLONE R.1820-G.105A ENGINE
26. Note the following:
(i) Limiting operational conditions (fuel not less than 90 octane).
Take-off (3 minutes limit) Maximum r.p.m.: 2,350
Maximum manifold pressure: 43 inches
Climbing (15 minutes limit) Maximum r.p.m.: 2,300
Maximum manifold pressure: €œM€ gear 35 inches
€œS€ gear 33 inches
Maximum continuous cruising (RICH) Maximum r.p.m.: 1,900
(€œM€ or €œS€ gear) Maximum manifold pressure: 30 inches
Emergency all-out level (5 minutes limit) Maximum r.p.m.: 2.350
Maximum manifold pressure: €œM€ gear 43 inches
€œS€ gear 34 inches
Dive Momentary maximum r.p.m. 2,760
(throttle not less than 1/3 open)
(ii) Oil pressures: -
Minimum (5 minute limit) 50 lbs./sq. in.
Normal 60 lbs./sq. in.
(iii) Oil Temperature: -
Minimum for taking off 10º C. rise
Optimum for all conditions of flight 74º C.
Maximum 88º C.
(iii) Cylinder Temperatures: -
Minimum for taking off 150º C.
Maximum for continuous cruising 205º C.
Maximum for emergency all-out level 260º C.
(5 minute limit)
THE HEIGHT AT WHICH HIGH BLOWER MAY BE ENGAGED WILL DEPEND UPON THE
CARBURETOR RAM AVAILABLE


FUEL CAPACITIES AND CONSUMPTIONS
24. Note the following:
(i) Effective fuel capacity:
Port tank 66.5 Imperial Gals. Starboard tank 66.5 Imperial Gals.
(ii) Fuel Consumptions:
The following figures should be taken as a guide and it must be appreciated that only consistently
accurate flying will give the best results. (For limiting operating conditions see par. 26).
(a) Maximum continuous cruising at 1000 ft. and 30€ Hg., 1900 r.p.m. and 260 I.A S. RICH €"
42 Imperial gallons per hour (approximately).
(b) Normal continuous cruising at 11,000 ft. and 24€ Hg., 1900 r.p.m. and 220 I.A.S. CRUISING
LEAN €" 32 Imperial gallons per hour (approximately).
(c) As in (b) at 1400 r.p.m. and 188 I.A.S. CRUISING LEAN €" 21.5 Imperial gallons per hour
(approximately).
(d) Extreme range at 8,000 feet, 23.5€ Hg., 1200 r.p.m. and 129 I.A.S. CRUISING LEAN €"
15.5 Imperial gallons per hour (approximately).
Note: It will be found that mixture must be leaned out by hand to get best results and cruising lean position
cannot always be relied upon.
OIL CAPACITY
25. The oil tank has an effective capacity of 9.15 Imperial gallons.

George_McKee
09-03-2005, 04:11 AM
Hi everybody ,

I am trying to learn to fly the Buffalo Mk I but I got some problems with the engine management.
It happens and I have the fly manual of the real airplane and I tried to fly by using the engine settings that are described in the manual. I had no luck, I got the impression that the airplane is underpowered (I just couldn€t get things right)
I am wondering if the airplane has been modelled properly in the game and if not is it going to be fixed?
Below I submit the description of the settings from the manual please try them and let me know what do you think.(If anybody wants the manual let me know)

CLIMBING
11. During all climbs careful check should be kept of cylinder head temperatures. Maximum permissible head
temperature is 260º for 5 minutes. The best climbing speed is 145 m.p.h. with boost and r.p.m. as follows:
(Also see Para. 26).
Height Boost R.P.M. Blower Mixture
Sea Level 43.5 2350 (3 min. only) Low (M) Full Rich
1000 ft. to 10000 ft. Maintain 35.5 in. Hg. 2300 Low (M) Full Rich
10000 ft. to 17000 ft. Maintain 33.5 in. Hg. 2300 High (S) Full Rich
17000 ft. and upwards Full Throttle 2300 High (S) Full Rich
Reduce climbing speed be 3 m.p.h. for every 2000 ft. above 5000 ft.
Note: - The above engine conditions apply to climb ONLY and in any case must not exceed 15 min.

ENGINE DATA - NOTES ON THE CYCLONE R.1820-G.105A ENGINE
26. Note the following:
(i) Limiting operational conditions (fuel not less than 90 octane).
Take-off (3 minutes limit) Maximum r.p.m.: 2,350
Maximum manifold pressure: 43 inches
Climbing (15 minutes limit) Maximum r.p.m.: 2,300
Maximum manifold pressure: €œM€ gear 35 inches
€œS€ gear 33 inches
Maximum continuous cruising (RICH) Maximum r.p.m.: 1,900
(€œM€ or €œS€ gear) Maximum manifold pressure: 30 inches
Emergency all-out level (5 minutes limit) Maximum r.p.m.: 2.350
Maximum manifold pressure: €œM€ gear 43 inches
€œS€ gear 34 inches
Dive Momentary maximum r.p.m. 2,760
(throttle not less than 1/3 open)
(ii) Oil pressures: -
Minimum (5 minute limit) 50 lbs./sq. in.
Normal 60 lbs./sq. in.
(iii) Oil Temperature: -
Minimum for taking off 10º C. rise
Optimum for all conditions of flight 74º C.
Maximum 88º C.
(iii) Cylinder Temperatures: -
Minimum for taking off 150º C.
Maximum for continuous cruising 205º C.
Maximum for emergency all-out level 260º C.
(5 minute limit)
THE HEIGHT AT WHICH HIGH BLOWER MAY BE ENGAGED WILL DEPEND UPON THE
CARBURETOR RAM AVAILABLE


FUEL CAPACITIES AND CONSUMPTIONS
24. Note the following:
(i) Effective fuel capacity:
Port tank 66.5 Imperial Gals. Starboard tank 66.5 Imperial Gals.
(ii) Fuel Consumptions:
The following figures should be taken as a guide and it must be appreciated that only consistently
accurate flying will give the best results. (For limiting operating conditions see par. 26).
(a) Maximum continuous cruising at 1000 ft. and 30€ Hg., 1900 r.p.m. and 260 I.A S. RICH €"
42 Imperial gallons per hour (approximately).
(b) Normal continuous cruising at 11,000 ft. and 24€ Hg., 1900 r.p.m. and 220 I.A.S. CRUISING
LEAN €" 32 Imperial gallons per hour (approximately).
(c) As in (b) at 1400 r.p.m. and 188 I.A.S. CRUISING LEAN €" 21.5 Imperial gallons per hour
(approximately).
(d) Extreme range at 8,000 feet, 23.5€ Hg., 1200 r.p.m. and 129 I.A.S. CRUISING LEAN €"
15.5 Imperial gallons per hour (approximately).
Note: It will be found that mixture must be leaned out by hand to get best results and cruising lean position
cannot always be relied upon.
OIL CAPACITY
25. The oil tank has an effective capacity of 9.15 Imperial gallons.

GerritJ9
09-15-2005, 07:32 AM
The Mk. 1 Buffalo was underpowered in real life, or perhaps it is more correct to say it was overloaded with all sorts of extra equipment specified by the RAF. Furthermore, it had an 1100 hp engine- the F2A-2 on which it was based had a 1200 hp Cyclone and was significantly lighter, so your feeling that it is underpowered is correct historically.
Remember to switch supercharger stages at around 3000 metres/10,000 ft. altitude- stage 1 below 3000 metres, stage 2 above. For take-off and combat/full power I run 100% mixture strength; less than 70% power I run at 80% mixture.
All Brewster variants are modelled too slow, but the B-239 and F2A-2 are quite manoeuverable. Not as good as the A6M2 or Ki.43, but overall the F2A-2 is a better aeroplane than the Ki.43: heavier armament, faster, can outdive both Ki.43 and A6M2.