Ju-88 a1 Jumo 211B BETA 1.08.18956

[Chromius]

Anyway more Performance charts and testing. Edit: I will have to do some tests at 1.1 ATA and 2100 which will fall much shorter than stated performance.

Ju-88 a1 Jumo 211 B 11,300 kg load 4xSC250




Ju-88 a1 Jumo 211 B 12,000 kg load 2x500




The part 1 is performance with bombs climbing and cruise. Part 2 is return flight after dropping the bombs and additional glide times from altitudes. No idea how much fuel was used after dropping bombs. Also fuel usage in litres per hour for different cruise settings are listed.

Note the drag on the loaded flight out to target w/ the 4x250 vs the 2x500.

Ok now my in game testing with no winds in mission builder. My level flight speeds were steady from 5-10 minutes along with the recorded fluid temps with cooler settings.

My conversion to TAS are based on ATAGs conversion which match up with other real world conversions. The IAS-TAS chart on pg 112 of manual is off, so I am not sure how this translates in game.

All 3 altitude/speed readings were from a fresh plane with the following load.

11,025 kg 30% Fuel (994 ltr) 18xsc50, 10xsc50, 2x500

2000M

1.2 ATA 2400 RPM 334 IAS 378 TAS (According to chart in post 1 we should be closer to 422 TAS)
Water 45% 78/83 Oil 35% 84/77 Ambient Temp 12c

2250m

1.2 ATA 2400 RPM 329 IAS 378 TAS (According to chart in post 1 we should be at around 426 TAS)
Water 40% Oil 30% (did not record temps on this one)

2500M

1.17 ATA 2400 RPM 333 IAS 388 TAS (According to chart in post 1 we should be closer to 425 TAS)
Water 40% 80/80 Oil 30% ?/? Ambient 8.5c

With Radiator/cooler full open 100/100 speed dropped 3 km/h to 330 IAS

Note: aircraft flys well at 1.3 ata and 2400-2440 but if you push to 1.35 or more with it warm engine damage happens fast.

Single Engine performance w/ same load as above. (Bombs still on board 11,025kg)

1500m

1.3 ATA 2400 RPM 250 IAS 275 TAS
Water 50% 88 Oil 50% 94

Climb possible 228 IAS .4-.5 m/s

Fuel Weight .756 kg per litre

Fuel

100% = 2019 L
50% = 1648 L
30% = 994 L
10% = 340 L

Note the Max the Fuel Gauges read in position 3 F/R is 837/831 Gauge will not drop till fuel is consumed below this point.

The 4/5 position (Left and Right wing tanks) always read 125/125 even with 0% Fuel. No matter what I do with the fuel switches nothing seems to happen always seems to draw from the F/R. No way to transfer fuel as we have no fuel transfer levers.


I should test it out with the values stated also.

I tested in the range I did as that is the peak performance area for pre supercharger use. It would be nice to test at higher altitudes w/ and without bombs, and lower altitudes with no bombs.

That is it for me 5 cups of coffee later and Saturday spent playing with this, lol. Please add anything you can find. I am interested if the fuel switches do anything at all, I tried every combination. (As per pilots notes.)

It would be nice to come up with fuel use l/h and figure out what is wrong with the IAS-TAS chart that comes with clod and the real world values using standard .02 OAT deviation, and if the clod chart actually matches in game TAS values.

[torric270]

[QUOTE=Chromius;453995]
100% = 2019 L
50% = 1648 L
30% = 994 L
10% = 340 L

Note the Max the Fuel Gauges read in position 3 F/R is 837/831 Gauge will not drop till fuel is consumed below this point.

The 4/5 position (Left and Right wing tanks) always read 125/125 even with 0% Fuel. No matter what I do with the fuel switches nothing seems to happen always seems to draw from the F/R. No way to transfer fuel as we have no fuel transfer levers.QUOTE]

I get 3304 for 100% fuel (fuel increases once airborne). On fuel switch: #1 is for fwd fuselage tank (not modelled) #2 Outer tanks #3 Inner Tanks #4,5 are oil tanks read in the right gauge 125L per eng, if you get an oil leak u can watch this number decrease (oil consumption not modelled)

To transfer fuel from outer to inner tanks, which are the eng feeder tanks turn on #6 for left outer to go to both, and/or #7 outer to go to both inner tanks. These are what is in the game, not by the book.

[ATAG_Doc]

I'm going to test again but I had a tough time getting the 88 up beyond 5000 meters. The 111 is easy compared to the 88.