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View Full Version : Superchargers,WEP, etc.



TugZooey
03-05-2004, 06:36 AM
Sorry for interrupting the AEP http://ubbxforums.ubi.com/images/smiley/16x16_smiley-happy.gif

Is "supercharger" the same as WEP? How do I know when Supercharger next level is engaged (is there a visual sign in the cockpit?). I mapped a key to it (next & prev) but have yet to see any confirmation of it engaging.

Also, is throttle above 100% WEP too? So if my Methanol injection is engaged, is it still on when my throttle is at 80%?

Just confused on some definitions (I should know this by now!).

Thanks all!

You may now return your regular AEP discussion.

TugZooey
03-05-2004, 06:36 AM
Sorry for interrupting the AEP http://ubbxforums.ubi.com/images/smiley/16x16_smiley-happy.gif

Is "supercharger" the same as WEP? How do I know when Supercharger next level is engaged (is there a visual sign in the cockpit?). I mapped a key to it (next & prev) but have yet to see any confirmation of it engaging.

Also, is throttle above 100% WEP too? So if my Methanol injection is engaged, is it still on when my throttle is at 80%?

Just confused on some definitions (I should know this by now!).

Thanks all!

You may now return your regular AEP discussion.

AWL_Spinner
03-05-2004, 06:47 AM
Yes, they are different things.

Will leave the WEP questions for others but re: supercharger. This device is designed to compress air to provide optimum oxygen input into the engine. The amount of available oxygen per unit volume decreases with altitude and hence many aircraft have multiple stage superchargers to provide differing levels of compression. Some are automatic, some manual.

In practice, many of the manual superchargers should be changed to second stage at around 10,000-12,000ft (c.3,000m). The necessity to do so can often be gleaned from the aircraft's boost gauge (if one is present) which may start to fall even at full throttle past the transition altitude, if the supercharger is not set to stage 2. The Hurricane is a good example.

Obviously, when descending back down below this altitude, supercharger stage one should be set.

Cheers, Spinner

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TugZooey
03-05-2004, 07:10 AM
Thanks Spinner. So I guess I know if it engages by the boost guage, if present (meaning there are no on-screen messages or visible levers/switches/lights).

Maple_Tiger
03-05-2004, 08:26 AM
Supercharger is not the same as WEP.

every plane is differant. Some have one supercharger while others have two. Some planes supercharger are automatic.

WEP= War Emergency Power. WEP is activated when you exeed 100% throttle. WEP is deactivated usualy when you throttle down to 99%.

Capt. 361stMapleTiger.

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Proud member of the FBAA and Nutty Philosohpy Club.

Taylortony
03-05-2004, 10:51 AM
[QUOTE]
WEP= War Emergency Power. WEP is deactivated usualy when you throttle down to 99%.

Capt. 361stMapleTiger.

Or when the pistons end up slapping round in the cylinders http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif, I have During my RAF Training had the chance to turn an old engine over that was ran to nigh on destruction and even though it was running when shut down ( producing not a lot of power), you could spin the prop by hand and it would just windmill round on its own, there was no compression left in it. Had just about burnt everything out internally.... valves.... rings etc

AnalFissure
03-05-2004, 10:59 AM
"How do I know when Supercharger next level is engaged (is there a visual sign in the cockpit?). I mapped a key to it (next & prev) but have yet to see any confirmation of it engaging."
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Most likely, this is because the plane you're currently flying has an automatic supercharger (in FB, if the plane has this capability you are somehow prevented from switching them manually) -- hence, you get no confirmatory hud message.

Try using it in a different plane: The zero, stuka, he 111 all have superchargers that need to be manually switched.

ZG77_Lignite
03-05-2004, 01:11 PM
To expand a bit on MapleTigers post regarding WEP, Some aircraft have additional settings along with War Emergency Power (100%-110%).

For example aircraft such as the Bf109G6/AS, Bf109K4, P-47, use something called MW-50 water methanol injection (called MW-50 for German aircraft). This MUST be engaged at lower RPM/power settings. It can be left on for the entire flight (until the tank runs empty, but there is no guage to tell when your empty, use sparingly), it will only engage itself (automatically) at WEP settings (above 100% throttle).

FW190A5 (also A8,A9,F8) use a somewhat similar system, but it can be engaged whenever you like, it is actually injecting high octane fuel instead of methanol/water. Possibly (probably imho) it should be shut off when not critically necessary, to save the fuel extra fuel (it runs constanatly at any throttle setting I believe).

The Bf109E7/Z uses a system called GM-1, which is nitrous oxide injection I believe. This can only be used at very high altitudes (6000+m for E7/Z) to avoid severe engine damage. NEVER engage at low altitudes. I believe the new Ta-152 also uses GM-1 (as well as MW-50, it has both), its critical altitude may be 9000m for GM-1 (unsure).

BuzzU
03-05-2004, 01:29 PM
Like was said. You're probably flying a plane with an automatic supercharger. The planes with manual control will have a message telling you what stage you're in.


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Buzz
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