Author Topic: 190A8 vs SpitV (Read 4083 times)

TimRas · « **Reply #15 on:** June 09, 2004, 11:11:00 AM »

As I don't have any 'agendas' either way, I made a quick test. Beta 41, 50% fuel, A8 with 2x20mm.
Level acceleration 200-300mph TAS, alt 10000ft:
Spit IX - 32s
Spit V - 36s
Fw190A8 - 40s
Then 0g dive to sealevel. The max. speeds were very close, Spit V about 500mph and Spit IX and Fw about 520mph.
Conclusion: Spit IX dives definitely better due to its acceleration, Spit V is better initially, then Fw starts to catch slightly near sealevel.

The combat trim is off in Fw190A-8. The stick needs to be pushed to keep it in the dive. After the dive it made couple of perfect loops hands off.

jaxxo · « **Reply #16 on:** June 09, 2004, 11:21:38 AM »

Spitfire has awseome acceleration in those test paramaters...should easily win the dive part of that test, then get caught quickly upon straightening

Staga · « **Reply #17 on:** June 09, 2004, 11:33:06 AM »

IIRC in tests the Britons made in WW2 the Fw190 left Spits behind when accelerating ?

bozon · « **Reply #18 on:** June 09, 2004, 11:48:52 AM »

in AHI at least, the deciding factor in the dive acceleration is the level acceleration at the given initial speed.

for example, a P47 will not out dive anything, not even a spit, unless you get into the 400+mph regime. Only then it starts to pull ahead.

Bozon

Batz · « **Reply #19 on:** June 09, 2004, 12:11:52 PM »

The spit V in the Brit test was run at a lower power setting then the Spit 5 in AH2. Unless you do tests to match those power settings then your results will be skewed.

The spits don't out accelerate the 190As in AH btw. Mando tested SL acceleration himself. The a5 out accelerated both the 5 and 9 at all speeds and the a8 out accelerated both from 200 - 300 mph.

These are only SL tests so someone may want to run more tests at various alts but in my experience in AH I have yet to be "out dove" by a spit while in either the a5 or a8 when we began a dive close to co e.

The only time I have been caught is when the spit was already much faster.

I haven’t done any tests so I am only speaking from game experiences.

In AH1 I always “believed” the 190s accelerated to slow. I “feel” that the Ta152 acceleration is off as well. But it would appear that no one has yet to convince HT.

Nashwan · « **Reply #20 on:** June 09, 2004, 12:48:50 PM »

The RAF compared a Spit V at 12 lbs boost to an Fw 190 A3 at 1.42 ata.

During the time between the tests being made and the report being written, the RAF increased the authorised boost on the Spit V from 12 lbs to 16 lbs.

Below FTH, that's an extra 200 hp or so for the Spit. The AH II Spit V runs at 16 lbs, iirc.

TimRas · « **Reply #21 on:** June 09, 2004, 01:07:28 PM »

New quicktest, accelerations 200-300mph TAS, 50%fuel, alt 200ft:
Spit V - 54s
Spit IX - 52s
Fw190A-8 - 38s
(Almost exactly the same results Mandoble got earlier).
Conclusion: OTD Fw190A-8 accelerates the best, but this cannot be generalised to all altitudes. Categorical statements like "The spits don't out accelerate the 190As in AH" are incorrect.

Batz · « **Reply #22 on:** June 09, 2004, 01:19:50 PM »

Test it again at 5 k, 10 k, 15k. Starting above 17k IIRC the spit 9 should start gaining.

You will see my statement "The spits don't out accelerate the 190As in AH" is accurrate.

FYI

The Spit V in AH

Emerg Power

16lbs @ 3000rpm

Mil Power

9 lbs @ 2850rpm

The A5

Emerg Power

42.5 MP @ 2700rpm

Mil Power

39.5 @ 2400rpm

GODO · « **Reply #23 on:** June 09, 2004, 01:23:07 PM »

I was asking about diving (not level) acceleration of real 190A8 vs real SpitVb starting at lo speed (200 mph) and 10k.

Batz · « **Reply #24 on:** June 09, 2004, 01:25:24 PM »

The 2 are related...

GODO · « **Reply #25 on:** June 09, 2004, 02:23:06 PM »

Quote

Originally posted by Batz
The 2 are related...

weight fights against your HPs in level (increasing aoa and drag) and in a climb, just the opposite in a vertical dive. Climb and level acceleration are not proportional to dive acceleration. Look at the P51D, not exactly an excelent climber neither an excelent accelerator at level, but probably the best diver.

F4UDOA · « **Reply #26 on:** June 09, 2004, 03:02:44 PM »

Dive acceleration is another story.

Dive acceleration is usually very close to sustained climb at a given speed or altitude.

Aren't there any AFDU reports out there for comparison?

GODO · « **Reply #27 on:** June 09, 2004, 03:20:32 PM »

BTW, SpitV and 190A8 acceleration from 150mph (substained) to 300mph at 500 feet, and 175 mph to 300 mph at 10k, on WEP and loading 100% fuel.

500 feet
SpitV starting at 150mph TAS substained:
175 mph: 5 secs
200 mph: 10 secs
225 mph: 17 secs
250 mph: 27 secs
275 mph: 40 secs
300 mph: 65 secs

190A8 (2x20mm) starting at 150mph TAS substained:
175 mph: 5 secs
200 mph: 11 secs
225 mph: 18 secs
250 mph: 27 secs
275 mph: 39 secs
300 mph: 56 secs

10000 feet
190A8 (2x20mm) starting at 175mph TAS substained:
200 mph: 7 secs
225 mph: 15 secs
250 mph: 26 secs
275 mph: 38 secs
300 mph: 56 secs

SpitV starting at 175mph TAS substained:
200 mph: 4 secs
225 mph: 11 secs
250 mph: 18 secs
275 mph: 29 secs
300 mph: 43 secs

Flyboy · « **Reply #28 on:** June 09, 2004, 10:22:02 PM »

perk the spit5

Karnak · « **Reply #29 on:** June 10, 2004, 01:23:55 AM »

Remember that the Spit V in AH2 is more powerful than the Spit V in AH1.

However, the AFDU trials that I recall reading said that in a dive the 190 pulled away from all Spitfires, even the Mk XIV, although in the case of the XIV it was only for a short while and then the XIV was gaining. the V and IX did not gain.