Author Topic: 109 and compression!!!  (Read 1564 times)

Offline niklas

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109 and compression!!!
« Reply #45 on: January 06, 2000, 06:30:00 PM »
just added another picture. Itīs the same like the diagramm with the 109G5 and 109G6 but now with takeoff and emergency power (100% in AH), also without MW50
 http://www.stud.mw.tum.de/~sl1/testdata2.html

"back" should lead you to the other 3 diagramms

niklas

Offline juzz

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109 and compression!!!
« Reply #46 on: January 07, 2000, 06:49:00 AM »
Excellent! I have two questions though:

How long could the engine run at "Start- und Notleistung" settings?

Was there a minimum altitude limit that GM-1 couldn't be used below? I'm wondering why they show GM-1 figures on the graphs only over 10km.

Offline niklas

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109 and compression!!!
« Reply #47 on: January 07, 2000, 07:43:00 AM »
Sorry juzz, i donīt have any information about that.

Donīt forget, THIS "takeoff and emergency power" is not the same as WEP in AH, only 100% without WEP. mw50 was called "sondernotleistung", "special emergency power"
But i remember myself that i read somewhere that 1,42ata wasnīt allowed to use in flight, that it was even mechanically blocked in planes without mw50.

The GM1 line shows imo only maxspeed over the critical altitude for the use of GM1. Maybe that you only have to lenghten the line without GM1 up to the point where GM1 starts and youīll get the Maxspeed for the altitude band between these two points.

You have to know that iīm not too much interested to demand with these diagrams "correct" Maxspeed values for AH. Iīm only interested to have a higher critical altitude without wep for our 109g10 here. At the moment, when you fly high in about 23000ft, and you have a merge with a pony, you start to fight in an altitude where your engine suffers already under a significant lack of power, while for the pony 23000ft is still some 1000ft below itīs critical altitude.

I donīt know if HTC is able to simulate with the current FM the different critical altitudes with and without wep. (?)

niklas

Offline niklas

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109 and compression!!!
« Reply #48 on: January 07, 2000, 08:20:00 AM »
ups i said something wrong

the critical altitude changed for the 109 in AH. I get maxspeed now in an altitude over 25000ft.

Sorry, i was wrong when i said that the critical altitude for the 109 here is still at 20000ft

niklas