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XyZspineZyX
07-06-2003, 10:18 AM
Recently i noticed that engaging the MW50 on the BF109 at atitudes of 3000m and above will seriously damage the engine. Engaging it at lower altitudes is ok and you can climb to wherever you want with it active all the time. Only activating it does the damage. Might be a problem with mainfold pressure which reaches 1.7 or even 1.8 on the DB605D. That seems to be a little high.
Anyone know why this is or how you can prevent it, cos without the boost performance of the 109 seriously decreses.

XyZspineZyX
07-06-2003, 10:18 AM
Recently i noticed that engaging the MW50 on the BF109 at atitudes of 3000m and above will seriously damage the engine. Engaging it at lower altitudes is ok and you can climb to wherever you want with it active all the time. Only activating it does the damage. Might be a problem with mainfold pressure which reaches 1.7 or even 1.8 on the DB605D. That seems to be a little high.
Anyone know why this is or how you can prevent it, cos without the boost performance of the 109 seriously decreses.

XyZspineZyX
07-06-2003, 10:30 AM
As I understood it this was true in real life too. I could be wrong though

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Tully__
07-06-2003, 10:59 AM
Pull the throttle back to near zero before engaging it, or so I've read.....

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XyZspineZyX
07-06-2003, 11:53 AM
throttle back before engaging OR disengaging MW50

XyZspineZyX
07-06-2003, 12:43 PM
Tully__ wrote:
- Pull the throttle back to near zero before engaging
- it, or so I've read.....

Works for me if you do that. Doesn't damage the
engine. Otherwise you have about 90 seconds before
the engine falls apart.

XyZspineZyX
07-06-2003, 01:19 PM
Try to engage MW50 under 100 % else you damage the engine regardless if you are at high or low alt .

XyZspineZyX
07-06-2003, 02:52 PM
Well, I usually do engage the MW50 right after starting the engine, as it will work only on a throttle setting of above 100% there is no problem with this. When you engage it at an already high throttle setting and therefore with an already high manifold pressure, then the pressure will rise even more causing a few things in your engine to burst, and you know what that means.

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XyZspineZyX
07-06-2003, 07:53 PM
thx everybody!

Will try some of the tips.

XyZspineZyX
07-06-2003, 08:14 PM
Warm that baby up. After taking off throttle back to around 50-60% and enguage. As mentioned above it does not effect the engine unless throttled beyong 100%. It really will make the differnce when you need the extra go go juice.

XyZspineZyX
07-06-2003, 08:32 PM
Just made the experiment:

When engaging the MW50 at less than 100% trottle no damage will occure. You may then go to 100% or above without the risk of blowing up you engine. (seems that it starts smoothly when active before crossing the 100% mark) You may disengage the MW50 at above 100%. Only engaging it at 100% or above engine damage will occure (hit the button about ten times and the engine will fail).
At 2000m or below the trottle setting seems to make no difference (but i actualy didn't confirm it this time).

By the way i noticed that you can perform easy level flight with MW50 active and 100% for a loooooong time, even with radiators set to 2 or 4.

XyZspineZyX
07-06-2003, 11:16 PM
Doesn't the Methanol and Water reserves empty after a while? They should, if I remember there was only about 10minutes worth.

Speaking of which does the P-47s water injector tank ever empty? Cause I've yet to run out.

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XyZspineZyX
07-07-2003, 02:57 PM
You were only meant to use MW50 for 10 minute 'bursts' after that you had to go off the MW50 for a while. The tank held a good 40mins worth though IIRC - you just couldn't use it all at once http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif

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XyZspineZyX
07-07-2003, 04:47 PM
Unkle is right, there was 75 liter MW50 supply in G-10, G-14, G-6/AS, and consumed it at at a rate of 150liter/hour at maximum power. So thats 30 mins of use at full throttle.. on internal fuel, you already have your fuel tank drained by that time.

K-4 has 85 liters, and consumes it at 180 liter/hour. So this is about 30 mins of use, too.

Historically MW50 and maximum power could be used continously for 10 minutes, after which 5 minutes were required to let the engine cool down etc. Then again you could use it for 10 minutes again.

On manifold pressure... with MW-50, G-6/AS, G-14 max. normal MAP was 1,7ata, G-10`s and K-4s was 1.8ata or 1.98ata.

In Il-2, be careful not to engage or disengage MW50 injection above 100% power. AND WAIT until the manifold pressure slowly goes down to a safe level (about 1.3-1.4ata) before disengaging. Otherwise, engine damage may result, because its the MW50 injection that enables safe 1.8ata and above without premature knocking of the engine.

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