Over-revving the FW 190 D9 1945

[Jumoschwanz]

Originally Posted by gaunt1

]Of course, in reality it was easier to do it, La-7 wasnt that good even at medium altitudes.

How lucky we are to have actual WWII vets here to tell us how it was back in the day!

Anyway I just dove the 45' D9 from 5000 meters at full throttle with MW50 on and hit 870km/hr. I leveled out above the ground and held a speed above 800km/hr for quite a distance. Once it slowed down to 800km/hr I pulled back on the stick as hard as I could to see what would happened and that did not present any problems either except for a bit of a blackout. The plane made a few noises but no parts actually came off.

Now of course I fly only the official version of IL2, so I can not comment on how any of the various hacks/mods various people and their wet dreams have dumped onto the community......

[IceFire]

Originally Posted by Jumoschwanz

How lucky we are to have actual WWII vets here to tell us how it was back in the day!

Anyway I just dove the 45' D9 from 5000 meters at full throttle with MW50 on and hit 870km/hr. I leveled out above the ground and held a speed above 800km/hr for quite a distance. Once it slowed down to 800km/hr I pulled back on the stick as hard as I could to see what would happened and that did not present any problems either except for a bit of a blackout. The plane made a few noises but no parts actually came off.

Now of course I fly only the official version of IL2, so I can not comment on how any of the various hacks/mods various people and their wet dreams have dumped onto the community......

I've done it a couple of times and then not again for ages... How many times did you try? I also only fly stock.

BTW: You've attributed that quote to me which is incorrect.

[Jumoschwanz]

I thought of why you guys are blowing up the engines on your German aircraft.

The answer is in one of the old readme files that came with one of the old patches.

I tested my theory again, diving the 45' d9 to 870, 880 and 890km/hr from 5k and then leveling out above the ground. If I get bored tomorrow I will shoot for 900 and above and see if the airframe holds together.

Of course I have all the old patches and readme files saved, lets see who can dig through theirs and find the answer first.
This is just off the top of my head now, an old IL2 Luftwaffe Ace, but if I get time I will take a look and note the specific readme that talks about this......

Happy hunting!

[Woke Up Dead]

Originally Posted by Jumoschwanz

How lucky we are to have actual WWII vets here to tell us how it was back in the day!

Anyway I just dove the 45' D9 from 5000 meters at full throttle with MW50 on and hit 870km/hr. I leveled out above the ground and held a speed above 800km/hr for quite a distance. Once it slowed down to 800km/hr I pulled back on the stick as hard as I could to see what would happened and that did not present any problems either except for a bit of a blackout. The plane made a few noises but no parts actually came off.

Now of course I fly only the official version of IL2, so I can not comment on how any of the various hacks/mods various people and their wet dreams have dumped onto the community......

I only fly the stock version too. Did you spawn at 5000m in quick mission or did you climb first to get your engine to normal temperature?

I can consistently fry my D9 1945 engine with this procedure:
- pick a summer map in QMB
- start at sea level, set radiator to automatic, turn on MW50
- climb to 5000m keeping the engine just under overheat temperature
- push throttle to 110% and dive steeply to reach 850km/h as soon as possible
- lessen dive angle a bit at 850km/h to avoid disintegrating, but try to keep it between 850 and 880 until you're on deck
- level out and run as fast as you can as low as you can as long as you can

I will get the overheat message right around the time I hit sea level, sometimes a bit later sometimes a bit sooner. Just seconds after that I will hear the engine make worrisome noises, and seconds after that it will die.

I find I can delay the fried engine if I set the radiator to "open" rather than "automatic." However, no matter the radiator setting I can't replicate this problem in the D9 1944, which does not have the MW50 but another boost system, or the 109 K-4 C3, which has the MW50 but another engine, or the Ta-152 H-1, which has the MW50 and I believe the same engine as the D9 1945.

[Jumoschwanz]

Originally Posted by Woke Up Dead

However, no matter the radiator setting I can't replicate this problem in the D9 1944, .

Wow, imagine that aircraft with two different engines or airframes would perform differently under the same conditions, amazing!

If that feature of IL2 is too "amazing" for someone to handle, then luckily they can choose less realistic settings.

I will maintain that there is a simple operational procedure that was outlined years ago in one of the readme files that explains the phenomena in question.

If someone is used to their aircraft and knows how to operate it then they will not ruin the engine, unless it has a random mechanical problem as is part of IL2 Realistic settings. If they are not used to the craft they are flying and have not read all the materials released with each aircraft and each feature that has been explained in the Readme notes, the manuals etc. with each edition and patch release then they will of course have problems.

I will do some peoples homework for them, but not everyone's, I simply don't have the time. The best gift you can give is to teach someone to fish for themselves.

Maybe someday I will get into a duel with someone online and I will win because I don't blow up my engine and can get more out of it, I earned that and it is mine to give away as well as it is yours to earn or give away as you see fit.

Happy fishing.

[Woke Up Dead]

I like you Jumo, you're evenly balanced with a chip on each shoulder. I also admire your ongoing quest to use your hard-gotten knowledge to one day win an online duel.

If someone else would like to use this thread in this forum to exchange ideas, theories, or simply point out what I'm doing wrong if this over-revving is not a bug, then I'm all ears.

[Bolelas]

But you do make use of manual prop pitch, correct? If you dont, i think you should.
You keep the MW50 turned on the entire trip?

[IceFire]

Originally Posted by Woke Up Dead

I like you Jumo, you're evenly balanced with a chip on each shoulder. I also admire your ongoing quest to use your hard-gotten knowledge to one day win an online duel.

If someone else would like to use this thread in this forum to exchange ideas, theories, or simply point out what I'm doing wrong if this over-revving is not a bug, then I'm all ears.

Might be a silly note but you're engaging MW50 at low RPM yes? Otherwise you will surely destroy the engine one way or the other.

So... spawn at low alt, low rev, engage MW50, throttle to 110%, climb to 5000 meters, then dive back to sea level and try and make 870+kph without destroying the engine? Missed anything? Rads to auto?

Might want to give this a few tries again and see what my results are now.

[Woke Up Dead]

Originally Posted by Bolelas

But you do make use of manual prop pitch, correct? If you dont, i think you should.
You keep the MW50 turned on the entire trip?

No I don't use manual pitch, and I guess I probably should. It's just one of those situations where if I have a capable pilot in an La-7 behind me I'd like to fiddle with the controls as little as possible. It's nice that the German planes have all those automatic features, not having to worry about pitch or radiator settings in combat helps to make up for them being less maneuverable than a lot of opponents. And yes, I keep the MW50 turned on throughout the dive.

Also, it just seems odd that this would be a problem for this specific plane only, none of the other similar late-war German planes will wreck their engine in this manner, they'll just get an overheat message at the worst. I don't think any of the fast late-war US, USSR, or UK planes can wreck their engine in a single dive either. That's why I'm wondering if this is a bug or a feature.

[Woke Up Dead]

Originally Posted by IceFire

Might be a silly note but you're engaging MW50 at low RPM yes? Otherwise you will surely destroy the engine one way or the other.

So... spawn at low alt, low rev, engage MW50, throttle to 110%, climb to 5000 meters, then dive back to sea level and try and make 870+kph without destroying the engine? Missed anything? Rads to auto?

Might want to give this a few tries again and see what my results are now.

That's right, I know about not engaging MW50 at high rpm.

Spawn at low alt, low rev, engage MW50, throttle to 110% but you'll have to reduce it later to climb to 5000 meters without overheating. Dive back to sea level, see how long you can hold it over 850 or even over 750km/h without destroying the engine. Rads to auto.

Manual pitch and rads to open will probably solve the problem, but you'd think the automatic features should know how to protect the engine, they do in all earlier German planes.