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krazyj

prefered altitudes

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Hi all,

 

Im tinkering with a profile for the X-rotors AW139,  and one of the issues I have is that PFPX always tends to select the highest FL, regardless of weather.

 

Being a Helicopter this is not always the best scenario, is there a way I can preset the profile to select an altitude/FL somewhere in the middle, without having to manually change it every time I plan a flight.

 

cheers

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Perhaps post your performance file so that those with greater knowledge could take a look and maybe advise.

 

PFPX calculates the altitude based on winds/profile data and optimization method and certainly for airliners the alt is not maximum.

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You'll need more knowledgeable advice than I can give but your cruise entry contains the same speed/fuel flows for all altitudes.
"

[DATA]
ISA-20;   6800
   OPT;   7000
   MAX;   19700
ISA;     4400    ;     5600;         6800;
2000;    475; 145;   475; 145;       475; 145;
4000;    475; 145;   475; 145;       475; 145;    
6000;    475; 145;   475; 145;       475; 145;    
8000;    475; 145;   475; 145;       475; 145;    
10000;    475; 145;   475; 145;       475; 145;
12000;    475; 145;   475; 145;       475; 145;    
14000;    475; 145;   475; 145;       475; 145;    
16000;    475; 145;   475; 145;       475; 145;    
18000;  475; 145;   475; 145;       475; 145;
[/DATA]

"

 

Have you followed Jon's guide PFPX AIRCRAFT FILES EXPLAINED

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yes, the fuel consumption varies very little for a helicopter as the engines are basically running at full rated speed throughout.

 

but as mentioned above the files are a work in progress and needs to be tinkered as required to dial in the actual fuel consumption as programmed by the addon

and yes I am refering to the guide, but helicopters are a special breed so it falls a little beside the target of the guide :)

 

but appreciate the input Srcooke

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