PPRuNe Forums - Search Results

Search: Posts Made By: XPMorten

Showing results 1 to 3 of 3
Search took 0.00 seconds.

Forum: Tech Log

14th Jul 2007, 10:22

Replies: 16

calculating thrust at altitude

Views: 17,082

Posted By XPMorten

Made some very unofficial calculations based on...

Made some very unofficial calculations based on data that I have.
FF's were based on NOMINAL weights cruise at FL370 for the
various acf types.

So, cruise thrust in percent of rated

B752 ...

Forum: Tech Log

9th Jul 2007, 18:03

Replies: 16

calculating thrust at altitude

Views: 17,082

Posted By XPMorten

Hawk, Thats the overall total efficency; ...

Hawk,

Thats the overall total efficency;

n = (speed)/(TSFC * Specific energy fuel)

As for the TFE731-2 engine (not -20) I have some data on it.
SLS SFC = 0,493
Cruise SFC = 0,87

Forum: Tech Log

7th Jul 2007, 09:20

Replies: 16

calculating thrust at altitude

Views: 17,082

Posted By XPMorten

BelArgUSA, Since your method is based on FF,...

BelArgUSA,

Since your method is based on FF, does it take into account the
engine increase in efficiency with Mach#?
http://www.xplanefreeware.net/morten/DOCS/eff.png

IGh,

Any chance you...

Showing results 1 to 3 of 3