Performance Charts

[tailwheel]

LaGG3

 

Some results I have compiled.  

 

Graph 1: IAS at different pitchs / throttles.

each line is a different pitch, 10% at bottom, 100% at top. throttle along bottom.

dashed line is change in speed with different % fuel level.

 

Graph 2: TAS vs altitude

90 S1 - means   Throttle 90 Pitch 90 Supercharger 1. all radiators open, full fuel tank.

R2500 H900 S1 - means RPM 2500 Hg 900 Supercharger 1

TAS is derived from taking IAS and running it through the 'bombsight table' program that was developed for IL2 1946. I don't know how accurate the conversion is but that's the best I have.

Mix 75 means that for R2500 H900 S2 I used both mix of 75% and 100% and charted the performance difference.

The orange box indicates performance drop between S1 and S2.

 

Graph 3: speed and temp vs radiator settings.  0% - 100 % along bottom

AS oil - air speed at different oil radiator % and water rad closed.

AS cyl - air speed at different water radiator % and oil rad closed

AS both - air speed with oil/rad at same %.

Tmp Oil - oil temp with water rad closed and oil rad at different %

Tmp Cyl B - Water temp with both rads at same %

 

 

Edited May 20, 2018 by Tailwheelbrownbear
cleanup

[tailwheel]

This is for the Ju 87.

Top graph is an IAS comparison of different pitch / throttle combinations. All for alt of 3500.

The black dashed line shows speed change vs fuel tank level, using throttle % as tank fullness %.

 

lower graph TAS vs altitude:

R2475 A1.30 B5 - means RPM 2475  Ata 1.30  5 bombs   an (x) following means after dropping bombs

Can - means wing cannons.

 

Done in quick mission, 0 wind, aircraft in auto level mode.

 

Edited April 8, 2018 by Tailwheelbrownbear

[XQ_Lothar29]

Nice Job Tailwheelbrownbear

 

[tailwheel]

For the IL2

[tailwheel]

Pe-2 ser 87

 

TAS chart

The blue line is a baseline of 90% throttle and pitch, 100% rads

The green line is my cruise setting.

The orange line is the continuous rating setting with rads at 70%

S1 = Supercharger 1    S2 = Supercharger 2

 

Rad chart

The Rad Perf chart shows rad performance vs temp vs speed.

w Temp wtr : water temp, using water radiators

w Temp oil : oil temp,using water radiators

Edited December 31, 2017 by Tailwheelbrownbear

[tailwheel]

For the FW 190 A-3. Using Auto pitch and radiators. 

On the left chart the 2525 is RPM not ata.

On the center chart, 2300, 2525, 2400 indicates RPM and 90 indicates 90% throttle.

The 'After Patch' is the new speed for 2525 RPM after the last patch.

The Rad graph is for 90% throttle. Since you can't manually work the rad, these are the readings I got for whatever the rad tuned itself to.

Edited June 7, 2016 by Tailwheelbrownbear

[tailwheel]

Effects of flaps on air speed. Aircraft were set up in quick missioin, 3500m, Throttle 80% Pitch 100%, Rads 100%.

Then once the speed stabled out, flaps were added 25% at a time.

 

The 190 and Ju87 extend flaps in  set amounts. Thus the split, lines are 0%, mid  - gap - mid, 100%.

 

For the Yak1 the flaps extend differently based on the speed. The 0% is no flaps, 25% is extending the flaps at 80% throttle.  100% is slowing the plane down to 200kh extending the flaps and once down, returning throttle to 80%.  The 50% and 75% flaps points are simply inferred speeds by averaging out the line.

[tailwheel]

La-5

TAS chart is baselined for 90% throttle which is 2600 RPM and 970 Hg. for the Blue and Purple line throttle is set to 90%.

For the green  and orange line RPM is set to 2200 but Hg changes. Below 3000m 800 is used and above that are marked on the line.

This gives a constant increase velocity for cruise (green and orange).

The orange line is the same RPM and Hg settings as green but has radiators set to oil=50%  air intake 100%   air outlet 25%. For me this is a good tradeoff between speed and cooling.

The purple line is with 2 100kg bombs.

Supercharger switches best around 3750.

 

For the radiators chart you can see the red solid line shows little velocity loss with oil rad usage

There was no effect from the inlet radiators

The outlet radiators had a major impact on speed (no surprise)

Oil temp was effected by cyl rads (blue dashed line)

[StaB/Tomio_VR***]

A lot of work for almost nothing, sry, it's hard to understand something usefull :/

Edited August 9, 2016 by 64sTomio

[tailwheel]

A lot of work for almost nothing, sry, it's hard to understand something usefull :/

I find it useful for knowing optimal cruising altitude. When speed falls off, is no longer worth flying above that altitude. And what throttle settings to maintain a particular cruising speed. specifically for long flights, which were not uncommon in the 1946 version. There were some missions where the flight was 60 minutes round trip. Esp those carrier missions, out in the middle of the ocean. knowing a good tradeoff between rad settings and speed effect is useful. For quick hack and slash sessions ya, the charts don't give much. Oh and one other thing, some aircraft the oil and water coolers are interlinked so both coolers have some effect on both systems.

Edited August 21, 2016 by Tailwheelbrownbear

[TP_Jacko]

Well I foud the charts interesting. Do you have the time or interest to do the p40

[tailwheel]

Measurements for the Bf 109 E7

The TAS chart is quite plain and performance only drops off at lower power settings. However the high settings of this graph burn out the engine quite quickly so I should probably redo for useful engine ranges.

The Rad performance chart focuses on usable engine ranges. Still, the highest setting on the chart will burn the motor out in 6 minutes.

 

The last rad chart shows how dramatic the water cooler effects speed. Note the water cooler will effect oil temp but the oil cooler has no effect on cylinder temp. With the water cooler closed, the oil temp is higher at all oil cooler settings. ie..

The solid red line shows airspeed with the water cooler shut and opening the oil cooler from 0% - 100%

The red dashed line is oil temp, water cooler closed and oil cooler opening from 0 - 100 %

 

The solid green line shows airspeed with the oil cooler shut and opening the water cooler from 0 - 100 %

The green dashed line is oil temp, with oil cooler shut and opening water cooler from 0 - 100%

The green dash-dot line is cylinder temp, oil cooler closed and water cooler from 0 - 100 %. It is exactly the same (and under) the blue dash-dot line.

 

The solid blue line shows airspeed with both oil+water coolers opening at the same % together

The blue dashed line is oil temp, with booth coolers opening from 0 - 100%

The blue dash-dot line is cylinder temp, with both coolers opening from 0 - 100%.

 

 

Edited August 21, 2016 by Tailwheelbrownbear

[tailwheel]

Charts for the P40.   

 

For  the TAS chart I adjusted for how the manifold pressure rises as speed increases. I would reduce the throttle to maintain Hg until acceleration stopped.

As altitude increases, more throttle is needed to maintain Hg. Once at 100% throttle, the numbers on the graph indicate Hg the engine could attain.

The blue is the baseline, 90% throttle and pitch. Numbers off that line are Hg readings as altitude rises.

Normally tests are with 100% open flaps. However the red line for  rpm 2500/Hg35 are with cooling flaps at 'Nominal' (27%). So those speeds are skewed upwards.

 

 

The rad performance charts show IAS with the solid line (left axis)
Oil and cylinder temps are the dashed lines (right axis)

 

I chose the following as estimations on how I would use the engine. This is subject to personal preference :

  2500/35 - economy   ,   2600/37.5 - cruise   ,   3000/42 - combat   ,   3000/42.25 - emergency .

 

Note the engine will burn out after around 5 minutes on emergency power. l ran the plane till she burnt out and grabbed the highest speed attained.

3000 / 45.5 : 1.5 minutes     3000/42 : 2.5 minutes      2800/40 : 12 minutes     2700/39 : 30 minutes     2600/37.2 : unlimited      2890/5.0 (90%) : 1.5 minutes.

These are averages. I have seen the emergency power recovered message a couple times and would be interested in just how engine wear behavior is simulated.

 

Banana Brain.

Edited August 26, 2016 by Tailwheelbrownbear

[TP_Jacko]

Preliminary charts are posted. I will complete them in the near future.

Super many thanks Tailwheelbrownbear.

[IRRE_Rolluptito]

Thanks! 

[tailwheel]

IL-2 1941 specs. Very similar to the BOS version but a little faster.

 

For the air speed graph:

The mix is the lowest mix I could set before TAS began to drop. For 33%mix, higher mixes resulted in lower speed. Only one trial per mix % was done.

 

For the Rad graph:

Air speed is on left axis, temp is on right axis.

Cyl Temp O : shows how cylinder temp is effected by oil cooler
Oil Temp W : shows how oil temp is effected by water cooler

Edited September 13, 2016 by Tailwheelbrownbear

[tailwheel]

Pe-2 .35

Air speed chart:

Hg is with throttle set at 90% and supercharger position 1

 

Radiators:

the .35 has separate oil and water shutter controls, on right panel, green and red toggles.

Edited June 8, 2017 by Tailwheelbrownbear

[Retnek]

That's a lot of work and I'm really grateful! I love to see the data measured, helps a lot to fly the planes "on the edge", especially the bombers!

[Davinsky]

Tailwheel, do you work for NAVAIR? I ask because, your performance charts look like they came out of a NATOPs manual.

These will be very useful, Bravo Zulu, Sir!

[tailwheel]

He 111 H6 performance.

I added the dashed lines to figure out what power/rpm settings to maintain speed. Those are labeled 'extra ata'. On the graph there are labels showing ata and rpm to maintain the dashed line speed.

 

I also added the speed difference between open and closed cockpit window.

Then I threw in my cruise speed with 4 x 250kg bombs.

 

The dark ata line is supercharger 1. Supercharger in auto mode kept the pressure at 1.305ata for 90% throttle at all measured altitudes.

 

Looking at the radiator chart, I think 25% oil radiator might be better for cruise, assuming keeping an eye on the temps.

Edited November 25, 2017 by Tailwheelbrownbear

[JG27*Kornezov]

Good work, actually I am more used when in x is the speed and y is the altitude, more intuitive, and allows a better comparison with the old game by il 2 compare.

[tailwheel]

Good work, actually I am more used when in x is the speed and y is the altitude, more intuitive, and allows a better comparison with the old game by il 2 compare.

I looked into that, I chart all this in Excel, and this is how it shows up. Then intuitive part is somewhat objective, because for me seeing how the speed changes with altitude gives a graph that looks more intuitive to me (ie what I've created).

 

The performance charts I see online are more in line with the engineering standard I guess. (opposite to what I created) I find it curious though that the speed is on the x and the other variable is on the y.  Anybody know why that was done?  Is there an engineering standard or scientific graphing standard being followed?

 

I did a quick google, X-axis is what you are changing (altitude) y-axis is what you are measuring (speed). Will do some more research.   So... that would mean when those charts were created... they would fly to an airspeed then measure the altitude they were at. Was that how it was done?  "Fascinating", Spok. 

 

Love the internet... did a google on 747 performance and got a link to women's yoga pants. ok.... I'll sign for that.

Edited July 13, 2017 by Tailwheelbrownbear

[tailwheel]

For the Bf 110 E2 (no mods).

Edited July 17, 2017 by Tailwheelbrownbear

[tailwheel]

Ju 88 A-4.  I will add summer cruise speed in the future.

For the cruise speed I choose settings that are as high as possible before the tech messages indicated climb configuration. For the rad in the cruise, I run in summer map, at cruise speed and set the cowls to minimum to keep temp in safe zone. However the 20% for my measurements might be too small and 25% would be better. But that's for summer.
The radiator graph is pretty simple because the cowl controls both oil and water.

'Base' is 90% throttle and pitch, but this will burn out the motor if run at extended periods. It's a standard measurement to be able to compare different aircraft.

Edited July 19, 2017 by Tailwheelbrownbear

[tailwheel]

This chart shows the TAS kmh difference when the canopy is open vs closed. The differences are recorded over various altitudes. Settings were 80% throttle , 80% RPM, 50% radiators. Once the speed stopped changing with the canopy closed, the canopy was opened and speed re-recorded. The graph displays the difference. I was expecting the speed delta to decrease with altitude, but the converse occurred.

Edited August 11, 2017 by Tailwheelbrownbear

[=TBAS=Sshadow14]

great work man but why are some speeds off..

Eg, Stuka can fly 410 kph without bombs
But yours oly goes upto 360 kph or so

[tailwheel]

great work man but why are some speeds off..

 

Eg, Stuka can fly 410 kph without bombs

But yours oly goes upto 360 kph or so

Are you referring to the IAS chart? At 3500 my calculation* gives a speed of 442 for a reported speed of 360kh.  That graph was only meant to show speed differences for varying pitch/throttle and not for overall speed ranges. It is for an altitude of 3500m using the IAS speeds displayed by the speed bar. It is also with 100% radiators & 100% fuel.

* have not confirmed my TAS speed to formal calculations, as I am simply using a program called 'Bombsight table 2'

 

The TAS graph is adjusted for altitude. This one was meant to determine best altitude/performance, esp for cruising. That graph indicates a top speed around 420 but this is only at 90% pitch & throttle, and with the radiators full open and 100% fuel. Most of the other speeds are at cruising settings  ie 1.15 ata + 2250 RPM, or for short time 'attack speed'. For some planes the 90% baseline drops off with altitude compared to a constant manifold pressure. This is because at higher altitude you apply more throttle to retain manifold.

 

For some aircraft running at 90% will burn out your engine, ie the 87.

Edited August 12, 2017 by Tailwheelbrownbear

[HenHawk]

Thanks OP for putting these charts together, it's very useful information and I'm sure it took a great deal of time to collect/organize!

[tailwheel]

For the I-16 Type 24.  (V2.012)

 

Temps were done in Stalingrad summer, 1000m.

The oil rad seems to have no effect on air speed (oIAS). However the cowl shutters effect oil temp (wTemp oil). It would appear the airflow through the shutters goes through both oil and water coolers.

 

TAS.

Base: as usual this is Throttle 90, Pitch 90, Rads 100. I also added speeds for boost.

For the Cruise I set the Rad to 40%, it seemed a good compromise for summer maps to keep the engine cool. The numbers attached to the line are the Hg at full throttle when it dropped below 840Hg.

The Hg lines are for Throttle 90 Pitch 90, plus boost. Boost lost influence at 2000m & 4500m. 

 

I also did a test of the speed loss when I opened the canopy (orange line). That was for Base settings @ 3000m

Edited November 15, 2017 by Tailwheelbrownbear

[F/JG300_Gruber]

Whoa, thanks for sharing all these tests mate !

[tailwheel]

For Ju 52 3 g4e.

Rads don't seem to make any speed difference, but I have noticed a speed loss when the oil is overcooled.

For the mix, the min and max mixture is when airspeed begins to decrease either above max or below min.

For temps, I added the normal oil temp of 80 in addition to maximums.

Edited March 27, 2018 by Tailwheelbrownbear

[tailwheel]

Yak 1 Ser 69

The mix chart includes a picture showing where the mix lever should be at different altitudes, green-summer  winter-blue.

 

 

[tailwheel]

Mig 3

 

Mix: fairly simple in the mig.

 

TAS: The mig is a little confusing for me.
With 90% throttle & 90% pitch, 100%mix gives best performance
With Rpm 2000 & Hg 950, then 50% mix gives best performance (I have to test with max throttle & adjust mix)
With Rpm 2050 throttle 100% then adjust mix to get 1050Hg I got the results with the red line

Opening Canopy reduced speed by 29Kh

 

Rad: Pretty straight forward, more radiators, more cooling, less speed.

note; legend title include text like 'oil[w]' and 'wtr[w]' read as  item[radiator] where item=TAS or temp(oil or water) and [radiator]= which radiator is being changed.

If a radiator had no effect on the item, it was left off the graph.

 

Edited May 20, 2018 by Tailwheelbrownbear

[tailwheel]

La-5FN ser2

 

[tailwheel]

Hs 129 B2

[tailwheel]

P47 incomplete

 

[=GW=seaflanker819]

I wonder how to get detailed IAS for drawing continuous curves

On 1/29/2016 at 10:36 AM, Tailwheelbrownbear said:

On 1/28/2016 at 1:17 PM, Tailwheelbrownbear said:

This is for the Ju 87.

Top graph is an IAS comparison of different pitch / throttle combinations. All for alt of 3500.

The black dashed line shows speed change vs fuel tank level, using throttle % as tank fullness %.

 

lower graph TAS vs altitude:

R2475 A1.30 B5 - means RPM 2475  Ata 1.30  5 bombs   an (x) following means after dropping bombs

Can - means wing cannons.

 

Done in quick mission, 0 wind, aircraft in auto level mode.

 

 

On 1/29/2016 at 10:36 AM, Tailwheelbrownbear said:

For the IL2

I am a little bit confused...wheres the bomb and rocket curve? overlap?

 

[tailwheel]

The Bomb and rocket curves are removed, I forgot to clear the legend.
For drawing the continuous curve; I plotted the graphs in Excel and the tool joins the data points with a line. I only take readings as per the horizontal axis numbers.

The IAS is displayed when you turn on the instrument panel in the game settings.

Edited January 23, 2019 by Tailwheelbrownbear

[tailwheel]

Yak 1 ser 127.  lines and numbers show what alt to set mix at, green=summer , blue=winter

 

 

 

Yak 7 ser 36

Edited March 23, 2019 by Tailwheelbrownbear

[=GW=seaflanker819]

On 2019/1/23 at PM12点46分, Tailwheelbrownbear said:

The Bomb and rocket curves are removed, I forgot to clear the legend.
For drawing the continuous curve; I plotted the graphs in Excel and the tool joins the data points with a line. I only take readings as per the horizontal axis numbers.

The IAS is displayed when you turn on the instrument panel in the game settings.

Thanks a lot for your constant update on forum, it must take you lots of time.

 

But I wonder whats the standard of mixture-alt curve, and the meaning of max and min mix(I used to 85%for m105pf under 2-3000m, for the 3.001x update, i use 80% for yak1/1b and pe2, 75% for yak7 to get rid of smoke, on 4000m, decrease 5%)