Mod request, no speed limit and Sonic boom effect
#16

you're also forgetting something called critical mach, the speed at which no ammount of propulsive force will make the plane go faster. most planes reach their vne (velocity never to exceed, i.e. the speed you are in danger of breaking up) first but their are a few planes in the game i'm sure that will hit critical mach limit before vne. the f6f and f4u are good candidates for that.
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#17

RedChico Wrote:Me 262, Ta 183 (if you forget about those tail problems) have the necessary profile to reach the speed of sound, but are they prepared to pass it? No.

Wrong I've posted a 262 passed the speed of sound on April 9th 1945, but the pilot didn't want to validate the speed because the RLM wanted to limit the speed of planes at 900kph (because the ministry didn't want to lose too many aicrafts). So persons who passed this speed were sent on jail, Hans-Guido Mutke had convinced there was a mechanic malfunction but the indicator of tachometer were locked on the top speed, 1100kph, yeah 1100kph, it's not a joke, but the plane was seriously damaged, nuts went out little by little, and wings were deformed, after the dive, he noticed the plane flew to the up and the right.
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#18

godzyla Wrote:
RedChico Wrote:Me 262, Ta 183 (if you forget about those tail problems) have the necessary profile to reach the speed of sound, but are they prepared to pass it? No.

Wrong I've posted a 262 passed the speed of sound on April 9th 1945, but the pilot didn't want to validate the speed because the RLM wanted to limit the speed of planes at 900kph (because the ministry didn't want to lose too many aicrafts). So persons who passed this speed were sent on jail, Hans-Guido Mutke had convinced there was a mechanic malfunction but the indicator of tachometer were locked on the top speed, 1100kph, yeah 1100kph, it's not a joke, but the plane was seriously damaged, nuts went out little by little, and wings were deformed, after the dive, he noticed the plane flew to the up and the right.

the tachometer measures rpm's of the engine, do you mean the speedometer?
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#19

godzyla Wrote:...were locked on the top speed, 1100kph, yeah 1100kph, it's not a joke...
Even if this story is true (and it's at best a very disputed claim), the speed of sound is 1235kph, so he'd still not break the sound barrier if he went 1100.

(And yes, tachometer measures rpm's not speed.)
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#20

According to a NACA test pilot, whose book I read (can't remember name but could look it up), the fastest officially recorded Mach speeds by piston engine warbirds (in dives) was 0.8 Mach by a regular production P-51D (he said due to its clean lines), and a late mark Spitfire which had been specially modified for the purpose achieved 0.9 Mach. One of the main problems about getting piston engine planes to these kind of speeds was the propeller, whose rotating tips went supersonic well before the airspeed of the plane and tended to break apart.

The other issue for all aircraft attempting supersonic flight is even with swept wings and a clean airframe there's a huge trim change going supersonic which was part of the original barrier. These sorts of points were discovered trial and error by exceeding the sound barrier in aircraft like the X-1 and learning how to change aircraft design accordingly.

As others have said I think this supports the observation all aircraft in Il2, Me-163 or otherwise if they don't have a subsonic critical Mach, they've got a subsonic VNE. The sudden and dramatic trim change going supersonic in a diving Me-262 for example (assuming its critical Mach was supersonic), wouldn't be expected and would invariably be fatal, even if the structure per se (all things being equal) would otherwise be expected to handle it. In any case it'd mean: supersonic Me-262=desintegrated Me-262.
The MiG-15 for example killed pilots if they got it supersonic. The Sabrejet could manage breaking the sound barrier for a moment in a dive, but once the Supersabre was sustaining Mach speeds there were severe safety problems which killed pilots.

I think considering all this there is no imaginable reason Oleg would've considered the need for any dedicated Mach modelling in Il2. Thus I can't imagine what modders would work off as a basis for any Machspeed mods, like Hawk alluded.

Nice idea, but not realistic. And VNE of course limits airspeed whatever happens, very few warbirds manage past 450mph IAS (or even getting that fast in a dive) without something very bad happening.
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#21

godzyla Wrote:The only aircraft to pass the sound wall during WW2 is the Me-262A-1a piloted by Hans-Guido Mutke on April 9th 1945 during a great dive.

sorry, but this is an urban legend brought up by Mutke himself.
not possible in this plane and live to tell.
by all modern aerodynamic expertise - and there is a considerable amount of that on the Me-262 as it was tested extensively in the US during the race to "the wall".
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#22

about Mach, I think if somebody "moded" a DFS 346 or a Silbervogel, Lippisch P.13 or something like this... A "booom" and a over 1100 Km/h Mod is a "must"-Project.

It would be interesting - if somebody is working on a fast Mod...

:wink:
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#23

Quote:One of the main problems about getting piston engine planes to these kind of speeds was the propeller, whose rotating tips went supersonic well before the airspeed of the plane and tended to break apart.
I was at the Tillamook, Oregon air museum reading about the propellers on the B-50's. I don't remember the exact words, but it was something to the effect that they had to figure out how to make them big enough to handle the huge horsepower, but shaped just right because the tips moved beyond the speed of sound.
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#24

You know you guys act like breaking the sound barrier (Which dosn't exist) [Better said] Exceeding the speed of sound is impossible. There's a difference with going 768MPH and going faster then sound. Sound travels at different speeds under different amount of air pressure, gases and ect. Correct me if im wrong the more moist the air and the lower teh pressure the day the high chance of breaking the speed of sound. So under Super ideal situation i could have been possible to go faster then the speed of sound in a spit fire. p-51 sound more likely but it dosn't make that much easier.

Now what you are referring to is mach speed which is set to 768 MPHs the average speed of sound in a day. I turned of vulnerability and flutter affect and i manged to get the me 262 to about mach 1.2

(1,400 KMPH Which is actually just under 1.2) I didn't pull out.... It's probably not impossible to go mach speed in IL2 But i don;t think that the planes will perform as accurate as we would want at those speeds.. (Referring to Korea)
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#25

p-47 in a dive from 10000m reached 1230km/h at pull-out, but lost rudder. plane still flyable afterwards. all realsim options turned on Confusedhock:. p-47 in il-2 is built like a tank
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