Posted by: miko-- 416 RCAF (JPC Squadron)
Posted on: 17:55:16 11/05/98
Message: A way to temporarily increase engine power beyong it's
normal limits. Usually done on internal combustion aircraft engines through
injecting water, but there were other ways.
Usually the increase in power caused engine to in a short while overheat,
since the engines were air-cooled or radiators were too small for the engine
size (vulnerable and not aerodynamic).
Use WEP when you need to climb fast or get away or catch up with someone.
Remember that torque increases with engine power.
Accelerated (or any) stall with WEP on will quickly spin you out if you
are not carefull.
Posted by: =para=
Posted on: 22:09:06 11/05/98
Message: Some performance measures like climb rate and acceleration
are functions of "Excess power" which is the power left over after
you subtract off the power required to maintain steady speed level flight
at your current altitude.
Although the extra (for example) 10 to 15% (perhaps) power might not
sound like much additional power, it might actually _double_ the amount
of excess power.
So WEP can have a big effect on performance if you are near maximum speed
or high and trying to climb, etc.
- Matt
WB: =para=
- From: "=worr=" <worr@cwix.com>
- Newsgroups: warbirds.training
- Subject: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 00:45:43 -0600
-
- I got to talking to =edge= about WEP on line and he encouraged me to
post up
- what we talked about, because it does not seem to be all that "common"
- knowledge.
-
- The best time to use WEP is for power and not for speed, if indeed
you want
- to use it wisely. With low power settings it will give you the most
delta. I
- would suggest anything below corner speed.
-
- The analogy I use is pedaling a bicycle and pumping your legs with
your arms
- as you ride no hands. Up a hill this can really give you the extra
boost to
- get you over the hump. But straight and level and going fast you do
very
- little. Unless you really need the extra 5-8ias in level flight best
stay
- off it and save it for when you get slow and need to climb, or get
fast
- again.
-
- Worr, out
- From: William Thompson
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 01:44:41 -0600
-
- My thoughts on WAR EMERGENCY POWER!
-
- I use my WEP only during a combat engagement, when your life is riding
those
- horses behind the prop!
-
- As =worr= wisely states, "The best time to use WEP is for power
and not for
- speed...." During any merge situation, when one might not be sure
of one's
- adversary's energy, use WEP. During any climbing maneuver, an immelman,
or a
- scissors, one would use WEP to boost the power up, and accentuate your
climbing
- capabilities with a few extra horsepower!
-
- The time to use WEP is not when one is climbing to altitude (one should
climb
- away from the combat area; never climb to a fight). Climb to altitude
near home,
- and enter a fight from an advantage.
-
- Personally, I rarely dive with WEP, but usually at idle throttle. I
save my WEP
- for after the dive, when I am ready to zoom climb or go vertical. When
giving
- chase to an opponent, WEP is usually an instinct, but one must give
heed to the
- aircraft's coolant temperature! With a hot engine, engine performance
will be
- worse than if you had never used WEP at all!
-
- WEP is most valuable when used in the right place. Otherwise, it seems
to me, it
- can be the overriding factor in performance degredation, in the long
run, and
- the necessitator of having to land to cool down, or worse, be shot
down because
- of an engine overheating!
-
- This is a good NG Thread. Thanks, =worr=, for posting. Anyone else
have any WEP
- thoughts?
- =worr= wrote
-
-
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 10:18:56 +0200
-
- William Thompson wrote:
-
- > The time to use WEP is not when one is climbing to altitude
(one should climb
- > away from the combat area; never climb to a fight). Climb to
altitude near home,
- > and enter a fight from an advantage.
-
- I disagree with this, not totally but somewhat. I constantly (but not
- allways) use WEP when climbing from field. This depends on plane but
- FW190 I mostly fly has enough WEP to get you above 2km before you notice
- allmost any rise in temperature. And when in 3km I chop throttle down
to
- 75% and engine cools down quickly. OK it is not best for fuel economy
- but then you should take more fuel in the first place :)
- >
- > =worr= wrote:
- > > The analogy I use is pedaling a bicycle and pumping your
legs with your arms
- > > as you ride no hands. Up a hill this can really give you
the extra boost to
- > > get you over the hump. But straight and level and going
fast you do very
- > > little. Unless you really need the extra 5-8ias in level
flight best stay
- > > off it and save it for when you get slow and need to climb,
or get fast
- > > again.
-
- This is one thing I got wrong when I first though that WEP would be
a
- kick in the back when flying level at high speed. But then I checked
few
- performance pages and compared speeds with and without WEP and found
out
- how little difference there actually is. For acceleration it is a must.
-
- --lu--
-
-
- From: "=worr=" <worr@cwix.com>
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 09:12:18 -0600
-
- >As =worr= wisely states, "The best time to use WEP is for
power and not for
- >speed...." During any merge situation, when one might not
be sure of one's
- >adversary's energy, use WEP. During any climbing maneuver, an
immelman, or
- a
- >scissors, one would use WEP
-
- Actually, in most gun defense moves you are trying to get them to blow
past
- you.
-
- Therefore WEP is really inadvisable for a scissors. Same goes for barrels
- and the defensive spiral.
-
- Worr, out
-
-
- Path: imolnews.icigames!not-for-mail
- From: "=worr=" <worr@cwix.com>
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 09:13:31 -0600
-
- >I disagree with this, not totally but somewhat. I constantly
(but not
- >allways) use WEP when climbing from field. This depends on plane
but
- >FW190 I mostly fly has enough WEP to get you above 2km before
you notice
- >allmost any rise in temperature. And when in 3km I chop throttle
down to
- >75% and engine cools down quickly. OK it is not best for fuel
economy
- >but then you should take more fuel in the first place :)
-
- I do the same thing in a JUG for obvious reasons. :)
-
- Worr
-
- Path: imolnews.icigames!not-for-mail
- From: William Thompson <wthompson@interconnect.net>
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 10:27:54 -0600
-
- =worr= wrote:
-
- > >As =worr= wisely states, "The best time to use WEP
is for power and not for
- > >speed...." During any merge situation, when one might
not be sure of one's
- > >adversary's energy, use WEP. During any climbing maneuver,
an immelman, or
- > a
- > >scissors, one would use WEP
- >
- > Actually, in most gun defense moves you are trying to get them
to blow past
- > you.
- >
- > Therefore WEP is really inadvisable for a scissors. Same goes
for barrels
- > and the defensive spiral.
- >
- > Worr, out
-
- The way I see it, if you are doing a scissors, there must be a high
energy cons
- rearing down your back side, and you are already in a lower E state.
WEP during
- a scissors will get you highers faster for the reversal, and saves
a bit of
- precious E you might need when you are done with the scissors, and
the opponent
- has blasted by you. It's not like you are going to be going any faster
at the
- top of a scissors with WEP, but it should accentuate your scissors.
I disagree
- that WEP is inadvisable for defensive maneuvers. As you said, WEP is
helpful for
- extra power. I use WEP during a rolling scissors or a high scissors,
but I
- suppose it would NOT be helpful in a flat scissors, when one would
want to be
- going nice a slowly to promote the overshot. I would say, use WEP when
your
- vector is perpendicular to the opponents attacking vector, trying to
increase
- the perpendicular component distance, while not putting more distance
between
- you and the opponent, parallel to his attack (forcing overshoot). This
will make
- him turn off sharper if he decides to follow your scissors (which will
soon
- place you in a higher E state if he bleeds his off), and if he extends,
the WEP
- will possibly let you keep enough E through the defense, to get the
hell out.
-
- As for the defensive spiral, i ALWAYS use WEP to get a better 'edge'
on my
- spiral climb! During a spiral, one is going to be at very low Energy,
and will
- need the power to achieve the most efficient climb throught the spiral.
-
- baja--
-
- From: William Thompson
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 10:33:33 -0600
-
- Again, I stand by saving WEP for combat engagement. Wasting it before
combat, seems to
- me to be, well, wasteful, for lack of a better word. I believe you
get 5 minutes? I
- could be wrong there. I always try to climb to altitude away from the
fight, and
- engage from an altitude advantage. I usually throttle between 85 and
90% for climbs,
- saving the engine for combat, as well. I don't know if this has any
effect in
- warbirds, but in WWII, most fighters seemed to not open the throttle
until combat. To
- me, it seems everyone in WarBirds takes off with the throttle set to
100% and never
- change it until landing. Then again, you can't blow your coolant in
WarBirds, so it
- seems; one just overheats, thats all.
-
- Alas, I must agree with you on non-combat use of WEP in the Focke-Wulfe
190. The dam
- thing just lasts forever, and the engine never seems to overheat! I
think that plane
- has one of the best damned engines in warbirds! It can fly forever
with no oil, and
- WEP on! It seems to take about 10 minutes before seizing when you have
an oil hit.
-
- Lauri Uusitalo wrote:
-
-
- From: William Thompson
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 11:15:36 -0600
- Gentlemen:
-
- After careful thought and consideration, I would like to recant my
ideas of using
- WEP during a scissors. After carefully reviewing when, if ever, i have
used WEP
- during a scissors maneuver, I cannot remember if I have or have not.
Alas, the idea
- is to force the overshoot, and slower velocities (not WEP) would lead
to the
- overshoot. However, in order to increase the defelection, WEP might
be useful only
- when your flight vector is perpendicular to the attackers line of fire
(attacker
- higher E) and the defenders movement is in an upwards direction (low
E).
-
- I stand by my use of WEP during the Spiral Climb.
-
- I do not want to spread bad information, so please let me know your
ideas on my
- recanting use of WEP for scissors.
-
- I believe, =worr=, that you opened yourself up to this question:
- "What is a scissors, when is it useful, how many different types
of scissors are
- there, how do you do them?"
-
- I want to hear the trainer's perspective. I could be doing the dam
things wrong all
- this time, anyhow.
-
-
- From: "=worr="
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 11:17:33 -0600
-
- >Again, I stand by saving WEP for combat engagement. Wasting
it before
- combat, seems to
- >me to be, well, wasteful, for lack of a better word. I believe
you get 5
- minutes?
-
- Based upon your assumption that would be correct. :)
-
- But WEP expiration is based upon tempurature not time.
-
- Worr
-
- From: "=worr="
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 11:18:44 -0600
-
-
- >As for the defensive spiral, i ALWAYS use WEP to get a better
'edge' on my
- >spiral climb!
-
- A spiral climb is not a defensive spiral.
-
- Worr, out
-
-
- From: "=worr="
- Newsgroups: warbirds.training
- Subject: Re: On Using War Emergency Power wisely
- Date: Fri, 22 Jan 1999 11:46:27 -0600
-
- >I believe, =worr=, that you opened yourself up to this question:
|
