Spit IIa

[JG53Frankyboy]

perhaps we have to know if these speedtests were made with DB601A-1 or DB601Aa...and wich engines drives the CoD 109s

[IvanK]

You cant have enough Graphs



The chart below I have no idea on its origin/provenance but post for further info.

[CWMV]

Indeed.
My only problem with the french numbers is that they had to run the low altitude tests with rads open due to cooling issues from not using the correct fluids. Especially when you look at the 5000M+ (Where the rads were closed) numbers that are well within 5% of the German numbers I posted.
Do I think that the rads being full open could take 40kph off the top end-you bet!

British tests with the same aircraft mirror those of the French, off the top of my head 16000ft was 355mph=571kph.

So weve got an aircraft that performs the same as German tests when you close the rads, and then is slower when you open them..seems logical to me lol.

And the Swiss tests were of an aircraft that had already gone through a third of its operational lifespan (if I recall 111 hours at test, retired at 350ish). In addition to this Kurfurst has summed up my thoughts on J-347 fairly well:

"Comparison of the speed results with Bf 109E prototype V15a's test report show remarkable similarity in the top speed achieved at altitude with the original VDM propeller of J-347 (572 vs. 564 km/h at rated altitude), especially when taking into account that J-347 already saw considerably use. However the low level speeds diverge greatly (498 vs 464 km/h at 0m altitude). However the low-level performance of V15a with the Höhenlader (high altitude supercharger speed, or 'F.S gear' in British terms) shows good agreement with J-347 at both high- and low altitudes.
This would suggest that J-347`s level speed results were achieved with the Höhenlader in operation, and the appropriate Bodenlader (low-altitude supercharger speeds, or 'M.S. gear' in British terms) was not used to record the results, therefore full performance of the aircraft was not reached below ca. 3500 meter altitude."

Regardless, the numbers call for a +/- 5%, so really Id be happy with anything from 470-500.
Ideally, to me anyway, 490 would be taken as a base, and a random power fluctuation within 5% would be applied to every 109, but I'm not sure the sim is there yet...

And yes, we all have our favored sources, but at least in this thread they were posted, and we can argue about the numbers rather than what we think the aircraft should do.

I suppose that's better...lol.

[JG53Frankyboy]

wondering about these supercharger comments having the DB601's automatic variable supercharger system in mind ?!

[IvanK]

Some more data we must include the TSAGI stuff for balance ... though I think its a bit skewed to the slow side ... differrent time and place... got to make the local product look good perhaps



And another that looks good with all sorts of detail but no idea on its provenance so caution on its use. Looks like some engineers calculations and extrapolations rather than actual test data ... just another of the countless snippets on my HD

[Al Schlageter]

Originally Posted by CWMV

That its 50kph too slow.
Ive already posted it, but here goes again...
http://www.kurfurst.org/Performance_...chreibung.html

Auszüge aus Flugzeugdatenblatt Bf 109 E-1, E-3 nach L.Dv.556/3
http://www.rolfwolf.de/daten/E4/Emil.html

Official documentation for production 109Es is trash. Right, got you.

1.) V0 = 467 km/h
2.) V0 = 467 km/h Werte graphisch
3.) V0 = 467 km/h auf 0 m bezogen!
4.) V0 = 466 km/h

http://www.kurfurst.org/Performance_...MP16feb39.html

Strange that you would ignore other data on Barbi's site.

[Ze-Jamz]

Here we go again...done and done and done to death

Please OP use the search function m8 your find all the info you need because as you can see this thread will now turn into a flame war on whos right and whos wrong

[David198502]

i just made another test with the E1.
i really focused that i stay in real level flight without loosing or gaining alt.
first test was at 3k:i stayed for ten minutes at 3k as close as i could get, only variying about +/-5meters in height.
the E1 reached its max speed at 440-445kph without WEP.

second test at 500m:again for ten minutes as close as possible in level flight.
max speed at 450-455kph

so that the E1 is faster at low alt which shouldnt be the case.

[fruitbat]

Originally Posted by David198502

i just made another test with the E1.
i really focused that i stay in real level flight without loosing or gaining alt.
first test was at 3k:i stayed for ten minutes at 3k as close as i could get, only variying about +/-5meters in height.
the E1 reached its max speed at 440-445kph without WEP.

second test at 500m:again for ten minutes as close as possible in level flight.
max speed at 450-455kph

so that the E1 is faster at low alt which shouldnt be the case.

IAS to TAS.

top speeds are measured in TAS, are you going by the instruments in the cockpit, if so, you've got IAS

at SL IAS and TAS are roughly equal depending in atmospheric pressure, at 3K TAS will be higher than IAS.

PS, i love how all the Blues are going on about how the 109 is nerfed, don't see much mention of the spit1 and 1a from the same folks, despite them being even more nerfed, lol. Give the spit1a is proper prop, its a bob sim not battle of france.

See june 25 entry.

[Whiski]

Originally Posted by Ze-Jamz

Here we go again...done and done and done to death

Please OP use the search function m8 your find all the info you need because as you can see this thread will now turn into a flame war on whos right and whos wrong

I am the original poster, and if you had read this thread carefully, you would have noticed I asked for factual, documented information regarding this issue for comparison, the search function did not provide such information (as stated before as well) just opinions and virtual simulation experiences. Now, this thread contains some great documentation to back up performance issues for all a/c within the game (from various sources).

I did not ask for a flame war, fact only backed up with information. A flame war would be beyond my control and request.

Whiskey