PDA

View Full Version : Bf-109K4 can run down a P51D in all out level ground run?



Ironman70
04-29-2004, 03:59 AM
I was in a P51D with low fuel and in a ballz out haul A$$ run home and a 109K4 was behind me slowly creeping up on me!! I was indicating 430kmp steady with full throttle and WEP engaged. Radiator closed and prop pitch was varying from 75% to 80% . Now tell me..how can a K4 keep up with this? Or could they actually out pace the 'stang in an all out level run ?

Ironman70
04-29-2004, 03:59 AM
I was in a P51D with low fuel and in a ballz out haul A$$ run home and a 109K4 was behind me slowly creeping up on me!! I was indicating 430kmp steady with full throttle and WEP engaged. Radiator closed and prop pitch was varying from 75% to 80% . Now tell me..how can a K4 keep up with this? Or could they actually out pace the 'stang in an all out level run ?

Franzen
04-29-2004, 04:04 AM
I'm not sure if it could have happened in reality but I know if it's online, anything can happen. I had a P40 outrun my K4 lastnight. http://ubbxforums.ubi.com/images/smiley/51.gif

Fritz Franzen

JtD
04-29-2004, 04:33 AM
A Bf 109 with MW50 rads closed is faster than a P-51 with WEP and rad closed at high altitude and about the same speed at low levels.

However, it accelerates better and can use the prop pitch cheat, both of which will make it faster than the P-51. Best thing to do is turn, the P-51 turns better than the K-4. :-|

Maple_Tiger
04-29-2004, 04:40 AM
BF109-K4 sea level 580km/h.

P-51B sea level 560km/h.

P-51D sea level 578km/h.

Fuel dosen't realy effect top speed. This should clear up why the K4 crept up on you.

I almost forgot. You stated that you were using 75 to 80% prop pitch?...

You can't dirrectly change prop pitch on most alied planes. The P-51D does not have manual prop pitch, it's use's a CPS system. All you need to do is set your desired RPM, while the propeller governor attemtps to maintain the set RPM.

100% RPM will give you max power but you will over heat and use up your fuel quicker. You proubly should have used 95% RPM setting, this way the engine would stay a little cooler.

With 75 to 80% RPM setting, you lost about 10km/h TAS. Rad will also slow you down. Even if you were experainced, the guy in the K4(If also experianced) could have eventualy cought you any way.

Capt. 361stMapleTiger.
http://img52.photobucket.com/albums/v158/Maple_Tiger/FBAA2.gif
Proud member of the FBAA and Nutty Philosohpy Club.

glottis77
04-29-2004, 04:43 AM
i'm not surprised. the k4 is FAST

jensenpark
04-29-2004, 05:47 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Franzen:
I'm not sure if it could have happened in reality but I know if it's online, anything can happen. I had a P40 outrun my K4 lastnight. http://ubbxforums.ubi.com/images/smiley/51.gif

Fritz Franzen<HR></BLOCKQUOTE>

LOL! Same thing happened to me in warclouds last night, except it was a P38 with one dead engine...flew faster a sea level than me...all I could see was this poor little P38, one wing engulfed in flames, slowly but surely pulling away...

http://www.corsair-web.com/thistler/rtfoxint.jpg
Buzz Beurling flying his last sortie over Malta, Oct.24, 1942

tfu_iain1
04-29-2004, 05:52 AM
hey i was on that server last night... ground attack in bf-110c... got the **** shot out of me, lost an engine, lost aileron control, gunner wounded... but some little saint on my team bounced the two guys attacking me and they broke thinking i was a gonner... i just made it back steering with trim and rudder.

damn i love this game, and the immersion on (nearly) full real is superb.

not that this is related to the thread of course

Bearcat99
04-29-2004, 07:46 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JtD:
A Bf 109 with MW50 rads closed is faster than a P-51 with WEP and rad closed at high altitude and about the same speed at low levels.

However, it accelerates better and can use the prop pitch cheat, both of which will make it faster than the P-51. Best thing to do is turn, the P-51 turns better than the K-4. :-|<HR></BLOCKQUOTE>

How is prop pitch a cheat? Come on man... thats the same kind of stuff that got the trim removed changed... if we had manual mixture (I wish we did) and we used that to enrichen the mix and get more performance would that be a cheat too? Prop pitch is a feature of the sim. It isnt a cheat and people who use a feature built into the sim should not be labeled as cheaters.

<UL TYPE=SQUARE>http://www.jodavidsmeyer.com/combat/bookstore/tuskegeebondposter.jpg (http://tuskegeeairmen.org/airmen/who.html)[/list]<UL TYPE=SQUARE>vflyer@comcast.net [/list]<UL TYPE=SQUARE>99thPursuit Squadron IL2 Forgotten Battles (http://www.geocities.com/rt_bearcat)[/list]
UDQMG (http://www.uberdemon.com/index2.html) | HYPERLOBBY (http://hyperfighter.jinak.cz/) | IL2 Manager (http://www.checksix-fr.com/bibliotheque/detail_fichier.php?ID=1353) | MUDMOVERS (http://www.mudmovers.com/)

p1ngu666
04-29-2004, 07:50 AM
over rev 109 engine, getting more power
can give a big boost :\
mind u, the over rev some might pull would really screw up a late war engine, **** quality, made by slaves
and the crappy fuel..

http://www.pingu666.modded.me.uk/mysig3.jpg
&lt;123_GWood_JG123&gt; NO SPAM!

CaptainGelo
04-29-2004, 07:50 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JtD:
A Bf 109 with MW50 rads closed is faster than a P-51 with WEP and rad closed at high altitude and about the same speed at low levels.

However, it accelerates better and can use the prop pitch cheat, both of which will make it faster than the P-51. Best thing to do is turn, the P-51 turns better than the K-4. :-|<HR></BLOCKQUOTE>

cheat==?!

click on my sight link that says plane is 2 slow, guns are 2 week....

'''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''
http://www.danasoft.com/sig/oleg86.jpg
'''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''


plane is 2slow, guns are 2weak and DM suck?...Then click here (http://www.hmp16.com/hotstuff/downloads/Justin%20Timberlake%20-%20Cry%20Me%20A%20River.mp3)

Fear british army. (http://216.144.230.195/Videos/Medium_WMP8/British_Attack.wmv)



http://img23.photobucket.com/albums/v68/wolf4ever/Animation3.gif
"Big Bills suck, small Bills don't"&lt;----WRONG!!!! all Bills suck http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif

p1ngu666
04-29-2004, 07:54 AM
oh and dont use 75% prop pitch in a allied plane and expect to go quicker

http://www.pingu666.modded.me.uk/mysig3.jpg
&lt;123_GWood_JG123&gt; NO SPAM!

p1ngu666
04-29-2004, 07:55 AM
oleg86, be careful with copywright, dont wanna see u get stung

http://www.pingu666.modded.me.uk/mysig3.jpg
&lt;123_GWood_JG123&gt; NO SPAM!

bodaw
04-29-2004, 08:13 AM
I used to read your posts with respect JtD, as it usually has good information for me to learn. But that one was way of the mark.

I'm no expert, having flown FB for only 4 or 5 months. But manual prop. pitch was a real feature of the Bf109 and Oleg and the team has modeled it to the best of their abilities and integrated into this sim. How's that a cheat?

Then would you say using 100% rpm setting on the constant speed propeller (CSP) a cheat as well? I think not. In real life you cannot use 100% (allowable max. rpm) setting with 100% throttle in dives. But everyone does in the sim, is that a cheat? I think not. These are the features in the sim. and we live with it.

On the side note, late model Bf109s do not get faster by using manual prop. pitch. It boosts the acceleration and climb rate, that's all.

LuftLuver
04-29-2004, 08:25 AM
1 - 75% to 85% prop pitch? Should have been 95 to 100. Close rad, 99% throttle.

2 - Late model K4 is fast on the deck, he should have caught you. What are you doing on the deck in a P51 anyway? http://ubbxforums.ubi.com/images/smiley/35.gif

3 - Prop pitch mentioned is rather an exploit, more to this than simple prop pitch Bear

4 - If you had even 20 rounds of ammo, I would have turned on him and shot him down. http://ubbxforums.ubi.com/images/smiley/16x16_smiley-very-happy.gif

"All your bases are belong to us."

Cajun76
04-29-2004, 08:26 AM
I believe what JtD is referring to is an unrealistic boost when switching from manual to auto prop pitch and back. I don't believe he's referring to using pitch alone as a cheat or exploit, but rather using, this 'glitch', if you will, of getting a powerful, temporary, overrev condition to boost the K4's already execptional climbing ability and power for close in combat. I've seen some tracks of it, but it appeared the individual relied a little too much on climbing, and not enough on getting energy. http://ubbxforums.ubi.com/images/smiley/16x16_smiley-happy.gif

Good hunting,
Cajun76

http://img12.photobucket.com/albums/v30/Cajun76/Real_35a.gif
What if there were no hypothetical questions?

CaptainGelo
04-29-2004, 08:38 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by p1ngu666:
oleg86, be careful with copywright, dont wanna see u get stung

http://www.pingu666.modded.me.uk/mysig3.jpg
&lt;123_GWood_JG123&gt; NO SPAM!<HR></BLOCKQUOTE>

not my, its just a link to one site where you can hear musik.

'''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''
http://www.danasoft.com/sig/oleg86.jpg
'''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''


plane is 2slow, guns are 2weak and DM suck?...Then click here (http://www.hmp16.com/hotstuff/downloads/Justin%20Timberlake%20-%20Cry%20Me%20A%20River.mp3)

Fear british army. (http://216.144.230.195/Videos/Medium_WMP8/British_Attack.wmv)



http://img23.photobucket.com/albums/v68/wolf4ever/Animation3.gif
"Big Bills suck, small Bills don't"&lt;----WRONG!!!! all Bills suck http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif

p1ngu666
04-29-2004, 08:45 AM
cool http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif
just didnt want u to get into troublehttp://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

http://www.pingu666.modded.me.uk/mysig3.jpg
&lt;123_GWood_JG123&gt; NO SPAM!

WhiskeyRiver
04-29-2004, 08:57 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Bearcat99:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JtD:
A Bf 109 with MW50 rads closed is faster than a P-51 with WEP and rad closed at high altitude and about the same speed at low levels.

However, it accelerates better and can use the prop pitch cheat, both of which will make it faster than the P-51. Best thing to do is turn, the P-51 turns better than the K-4. :-|<HR></BLOCKQUOTE>

How is prop pitch a cheat? Come on man... thats the same kind of stuff that got the trim removed changed... if we had manual mixture (I wish we did) and we used that to enrichen the mix and get more performance would that be a cheat too? Prop pitch is a feature of the sim. It isnt a cheat and people who use a feature built into the sim should not be labeled as cheaters.

http://tuskegeeairmen.org/airmen/who.html_vflyer@comcast.net_ http://www.geocities.com/rt_bearcat
http://www.uberdemon.com/index2.html | http://hyperfighter.jinak.cz/ | http://www.checksix-fr.com/bibliotheque/detail_fichier.php?ID=1353 | http://www.mudmovers.com/<HR></BLOCKQUOTE>

Bearcat,

I think he means rapidly switching back and forth between auto and manual modes. In RL this would've caused engine damage. In FB in it makes you faster.

To kill me you've got to hit the heart Ramon--Clint Eastwood

El Turo
04-29-2004, 09:13 AM
Viva la internet ignorant rants!

Callsign "Turo" in IL2:FB & WWIIOL
______________________
Amidst morning clouds
Fork-tailed devil hunts its prey
Lightning strikes, süsse träume.

Metallicaner
04-29-2004, 09:19 AM
The mustangs are faster in climbing, and descending, I've caught 109's many times with the Mustangs, especially the D-20, besides, it IS faster than the 109 or the 190 while descending, I managed to reach 820 km/h with it

BTW, once I was rtb to get score, I had TWO 190s and one 109 on my ***, about 500 meters, but they couldn't "catch" me...

CaptainGelo
04-29-2004, 09:23 AM
that thing is fast, and with manual prop.pitch it goes even faster and have better aceleration, but it cant last long on full power...

'''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''
http://www.danasoft.com/sig/oleg86.jpg
'''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''' '''


plane is 2slow, guns are 2weak and DM suck?...Then click here (http://www.hmp16.com/hotstuff/downloads/Justin%20Timberlake%20-%20Cry%20Me%20A%20River.mp3)

Fear british army. (http://216.144.230.195/Videos/Medium_WMP8/British_Attack.wmv)



http://img23.photobucket.com/albums/v68/wolf4ever/Animation3.gif
"Big Bills suck, small Bills don't"&lt;----WRONG!!!! all Bills suck http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif

Osirisx9
04-29-2004, 09:31 AM
Hmnn you should try the p-63. That K-4 wont catch that plane. I outrun K-4s and 190's all the time. And if i dont want to run, I turn and fight the K-4. 590 kph sounds soooooooooo good.

Osiris_X9

JtD
04-29-2004, 12:10 PM
It has been said by now, I only want to confirm:

I don't consider the use of manual prop pitch as a cheat.

I was talking about the repeated short time engagement of manual ptich, which allows to overrev a couple of seconds, giving a boost without damaging the engine.

VMF-214_HaVoK
04-29-2004, 02:08 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JtD:
A Bf 109 with MW50 rads closed is faster than a P-51 with WEP and rad closed at high altitude and about the same speed at low levels.

However, it accelerates better and can use the prop pitch cheat, both of which will make it faster than the P-51. Best thing to do is turn, the P-51 turns better than the K-4. :-|<HR></BLOCKQUOTE>

That is hardly a cheat. Its a feature built into the game. You can adjust prop pitch on just about any plane the 109s just happen to have auto but the user can elect to manual prop pitch. Besides that, very few can manual prop pitch the K4 well enough to get the small speed boost without blowing the motor.

http://www.flightjournal.com/fj/images/hellcat_head_short.jpg

Prof.Wizard
04-29-2004, 03:32 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Bearcat99:
thats the same kind of stuff that got the trim removed changed... if we had manual mixture (I wish we did) and we used that to enrichen the mix and get more performance would that be a cheat too?<HR></BLOCKQUOTE>
How was this before? I can hardly remember... http://ubbxforums.ubi.com/images/smiley/16x16_smiley-sad.gif

-----------------------------
http://www.mihailidis.com/images/WizardSig.gif
Me-163's HWK 109-509 Rocket Engine
http://www.mihailidis.com/images/HWK109509.jpg

BS87
04-29-2004, 05:05 PM
You guys need to read before you go up in arms about your beloved K4. He is NOT saying manual prop pitch is a cheat. What he is reffering to is the fact that, if you swithch between Auto and manual prop pitch alot, you can safely overrev the engine (alot) and gain a boost in performance. This is a glitch, and doing this in real life would kill your engine.

Copperhead310th
04-29-2004, 05:36 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JtD:
A Bf 109 with MW50 rads closed is faster than a P-51 with WEP and rad closed at high altitude and about the same speed at low levels.

However, it accelerates better and can use the prop pitch cheat, both of which will make it faster than the P-51. Best thing to do is turn, the P-51 turns better than the K-4. :-|<HR></BLOCKQUOTE>

I have to agree with this statment 100%

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>
Best thing to do is turn, the P-51 turns better than the K-4. :-|<HR></BLOCKQUOTE>

In FB as in real life the ME-109 had a serious problem with tight left hand turns. the tactic often employed by p-51 pilots was to start a tight left hand spiral turn and slow as you start to secend. the 109 cannot stay with you through the turn. this also works really well in FB. http://ubbxforums.ubi.com/images/smiley/16x16_smiley-wink.gif

http://imageshack.us/files/copper%20sig%20with%20rank.jpg
310th FS & 380th BG website (http://www.310thVFS.com)

RedDeth
04-29-2004, 05:43 PM
many here are saying people switch back and forth with manual to auto pitch in 109. actually thats risky. most just very quickley rev up and down the pitch. not go auto to manual to auto which will eventually ruin your engine minutes later and youll wonder why its dying even if your back on auto.

p51 on deck is VERY slow. most all planes can run it down ...k4,dora,la7,yak9,yak3,ki84s, oh heck any plane not a p51 can pretty much catch a p51 on deck. especially if the p51 isnt at 100 pitch

www.fighterjocks.net (http://www.fighterjocks.net) home of 12 time Champions AFJ http://www.alloutwar.com/IL2FS/round9.cfm http://members.optusnet.com.au/tully_78th/legalsig.jpg

Spectre-63
04-29-2004, 07:11 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Copperhead310th:
In FB as in real life the ME-109 had a serious problem with tight left hand turns. the tactic often employed by p-51 pilots was to start a tight left hand spiral turn and slow as you start to secend. the 109 cannot stay with you through the turn. this also works really well in FB. http://ubbxforums.ubi.com/images/smiley/16x16_smiley-wink.gif
<HR></BLOCKQUOTE>

is that "slow as you start to ascend" or "slow as you start to descend"???

http://home.comcast.net/~mjmcmahon672/images/Sig_Small.gif

LEXX_Luthor
04-29-2004, 08:08 PM
How do internet P~51 dogfighters get caught with empty fuel tanks and Fb109 on their tail?

I'd love to know how this trick is done.



__________________
http://ubbxforums.ubi.com/images/smiley/10.gif Flyable Swedish "Gladiator" listed as J8A ...in Aces Expansion Pack


"You will still have FB , you will lose nothing" ~WUAF_Badsight
"I had actually pre ordered CFS3 and I couldnt wait..." ~Bearcat99
"Gladiator and Falco, elegant weapons of a more civilized age" ~ElAurens
:
"Damn.....Where you did read about Spitfire made from a wood?
Close this book forever and don't open anymore!" ~Oleg_Maddox http://ubbxforums.ubi.com/images/smiley/16x16_smiley-surprised.gif

jmmoric
04-29-2004, 11:29 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Bearcat99:
How is prop pitch a cheat? Come on man... thats the same kind of stuff that got the trim removed changed... if we had manual mixture (I wish we did) and we used that to enrichen the mix and get more performance would that be a cheat too? Prop pitch is a feature of the sim. It isnt a cheat and people who use a feature built into the sim should not be labeled as cheaters.<HR></BLOCKQUOTE>

Agreed on the manual mixture, missing the "knob" when starting my engine, taking off and landing.
I guess they found an automatic mixture was easier for non-experienced pilots and the physics of the engine as well.
But I really don't think you'll get more performance from an engine by enrichening the mixture, actually every engine has an optimal performance which is given by a specific temperature in the cylinders, all you do by enrichening the mixture is lowering the cylinder temperature, risking to drown your engine and even causing the engine to perform worse due to carbon on the sparking plugs (in the long run) but you won't get more performance from the engine.
But since some engine-instruments are not working properly in the sim, we have to assume the mixture is always set at its optimum.
In my opinion, the automatic mixture ensures that everyone gets the optimal performance from their aircraft and doesn't favour "control-freaks" http://ubbxforums.ubi.com/images/smiley/53.gif.

rgds

Locust_
04-30-2004, 01:37 AM
Bearcat... the gentilman speaking of PP cheat is refering to the lil exploit used by many

I call it auto fliping & its lame!!!

This is where a 109 pilot sets his PP to 95 or 90 with throttle @ 105, then they flip between autoPP & 95PP with no consiquences at dam near any speed wich is a massive exploit & NOT in any sort of reality of ww2.

http://img20.photobucket.com/albums/v61/AFJ_Locust/161sig.jpg

Fighter Sweeps is here come join the fun.....
http://alloutwar.com/IL2FS/

JtD
04-30-2004, 02:12 AM
P-51 alos outturns a K-4 in reight hand turns.

I think the enriched mixture does not only cool the engine, but also makes it possible to get more energy out of the fuel with the same amount of oxygen, as more hydrogen and less carbon is burned.

Skalgrim
04-30-2004, 03:31 AM
proplem is p51d has her best sustain turn by 270-280km/h ias like k4 in fb,

but believe real has p51d best sustain
turntime above 300km/h,

109 has good turntime under 300km/h, because good liftloading and her slats help too

that means, too when p51d has same sustain
turntime like k4,

k4 would have smaller radius with 270-280km/h ias as p51d with over 300km/h ias real

but not fb,

because p51 has best turntime under 300km/h like k4


all 109g-k was exellent slow speed turner,
spits 5-9 was perhaps better, but p51d is not spit



that would mean p51 was too exellent slow speed turner, when p51 is right modell



have not know that



.

[This message was edited by Skalgrim on Fri April 30 2004 at 06:19 AM.]

jmmoric
05-01-2004, 10:35 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JtD:
I think the enriched mixture does not only cool the engine, but also makes it possible to get more energy out of the fuel with the same amount of oxygen, as more hydrogen and less carbon is burned.<HR></BLOCKQUOTE>

That is not quite true, optimal performance is ,in a piston engine, gained at a specific mixture of oxygen and fuel, not more or less, you may cool the engine by enrichening the mixture though, but you won't get more performance out of the engine, it will perform worse.

rgds

TheGozr
05-01-2004, 11:51 AM
It remind me when drag racing motorcycles or in a race we use the clucth the same way and for the same purposes.A last kick or for an extra kick to make the engine rev higher and have a boost .

Sure it's not good for the clutch disks but the engine should be fine.... On car and Motocycles sports.

http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

-GOZR
http://www.french.themotorhead.com/forgotten-battles/images/IOCompetition.jpg &lt;--Competition Level IL2fb here (http://www.french.themotorhead.com/forgotten-battles/)

Franzen
05-01-2004, 12:17 PM
Although I've never used it I assumed that the fuel mixture was to gain better performance at different alts being that the air is thinner the higher you go. Does this idea have any validity? I'm no expert.

Fritz Franzen

jmmoric
05-01-2004, 12:34 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Franzen:
Although I've never used it I assumed that the fuel mixture was to gain better performance at different alts being that the air is thinner the higher you go. Does this idea have any validity? I'm no expert.<HR></BLOCKQUOTE>

That is correct, the higher - the lesser fuel you "pump" into the engine to obtain the right mixture between oxygen and fuel. If you don't the mixture gets to rich, too much fuel with too little oxygen, and you may eventually drown the engine while climbing, eventhough I don't think the engine will produce enough power to let you get high enough to actually drown it http://ubbxforums.ubi.com/images/smiley/35.gif
But the system seem to be automatic in FB, so don't worry, you'll have optimal mixture (I hope).

rgds

Franzen
05-01-2004, 12:39 PM
Actually I had set a key once for the mixture and hadn't realized. I was climbing in the La7 online and it was losing power and smoking. I asked "who shot me?" but no one knew. I guess I was flooding the carbs and didn't realize it.

Another unsolved mystery solve. http://ubbxforums.ubi.com/images/smiley/blink.gif

Thx jmmoric http://ubbxforums.ubi.com/images/smiley/16x16_smiley-wink.gif

Fritz Franzen

JtD
05-01-2004, 03:32 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>That is not quite true, optimal performance is ,in a piston engine, gained at a specific mixture of oxygen and fuel, not more or less, you may cool the engine by enrichening the mixture though, but you won't get more performance out of the engine, it will perform worse.<HR></BLOCKQUOTE>

Depends on what you understand under 100%.

If it's the mixture with optimum power, than of course you are right. By definition. :-)

If it's the mixture where you use 100% air _and_ fuel, you are wrong. You get better power with burning less than 100% fuel, which I understand as rich mixture since there is too much fuel in the combustion chamber. It's not much, but it's rich nonetheless.

I think you are with number one, but I am with number two.