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AlphaSim Hawker Hunter

blue2

blue2

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unitedkingdom
Hi,
Is there any way to adjust the engine idle speed of the AlphaSim Hawker Hunter?
It idles at 4800rpm which is too high, the correct speed is 2500+50rpm. Dave Garwood's Hunters idle at the correct speed but I cannot find any means of adjusting the AlpaSim.

Cheers

P.S Forgot to mention that I am using FS9 ans FSX and this is my first foray into Aircraft modelling!
 
Last edited:
You adjust idle RPM in table 1503 & 1504, CN2 vs throttle position. These tables are in the airfile and can be edited with AirEd or Aircraft Airfile Manager.
 
Thanks for that JX, I've downloaded Aircraft Airfile Manager and spent the afternoon perusing it but I think I'm going to need some expert help here to adjust the ground idle speed.
The FGA9 Hunter Avpin starter normally winds the compressor up to 1850rpm when the engine usually ignites and accelerates up to 2500+500rpm ground idle.
Max RPM is 8000 +/- 50rpm, no problems there.

Using AAM and looking at 1503, 1504 and 1505 and comparing FS9 and FSX .air files what do I adjust (as I've said earlier, this is my first foray into .air files)?

Copies of Tables 1503, 1504 & 1505 below:-

FSX 1503 AlphaSim Hunter

Columns: 9, Rows: 4
0.02 1.02 4.48 15
0 60 64.20225 62.065903
0.1 63.244652 67.825485 65.594666
0.244611 68.830597 73.888649 71.193924
0.360618 73.988586 78.836807 76.362679
0.65 88.619156 92.187469 91.3537292480469
0.75 92.676483 95.844955 95.0641784667969
0.875 96.907074 99.583 99.1141967773438
0.995 100 102.5 102.069107055664


FSX 1504

Columns: 9, Rows: 4
0.95 1.02 4.48 15
0 60 64.202255 62.065903
0.1 63.244652 67.825485 65.594666
0.244611 68.830597 73.888649 71.193924
0.360618 73.988586 78.836807 76.362679
0.65 88.619156 92.187469 91.4953918457031
0.75 92.676483 95.844955 94.8551483154297
0.875 96.907074 99.583 99.0255584716797
0.995 100 102.5 102.10871887207

FSX 1505

Points: 10
0 0
0.01 21.5
0.5 35.160305
0.65 40.751484
0.77 46.867199
0.86 55.086468
0.93 69.634087
0.97 88.284645
0.99 98.588913
1 106.1



FS9 1503 David Garwood's FGA.9

Columns: 9, Rows: 3
0 1 22.57
0 30.5 82.5
0.42 52.8 95.4
0.51 73.5 98.5
0.61 87.4 100.1
0.7 92 103.1
0.79 96.2 105.7
0.93 103.1 108.06
1 105 108.06


FS9 1504

Columns: 9, Rows: 3
0.9 1 22.57
0 28.5 82.5
0.42 49 95.4
0.51 70.2 98.5
0.61 84.8 100.1
0.7 89.1 103.1
0.79 92.2 105.7
0.93 96 108.06
1 98.2 108.06



FS9 1505

Points: 10
0 0
0.0029 10
0.0118 29.9614000000001
0.0207 40
0.034 49.9814999999994
0.088 73.6
0.167 97.8001999999568
0.32 108.2
0.54 116
0.6869 120

Can I just copy the FS9 data and replace the AlphaSim data with them and alter the aircraft .cfg file to suit as well or what do you advise?
 
Thank you Roy, reading the reference article took me back to a RB199 ECU course I did with Rolls Royce at Filton when I worked with British Aerospace on Tornado's many years ago!
I take it that the inlet area in your tables needs to be applied to the Aircraft .cfg as well?

Nigel
 
Silly question, but why not just use my Hunter in the first place? :)
What is it you prefer about the Alpha model?
 
DaveWG said:
Silly question, but why not just use my Hunter in the first place? :)
What is it you prefer about the Alpha model?
Click to expand...

Not a silly question Dave, I have all your versions of Hunters on FS9 and FSX but the FS9 version of Alpha's Hunter has liveries of HOCU, 45 and 58 Squadron plus 229OCU which I served on during my RAF career as a propulsion technician.
Plus it was a birthday pressie from the strife.
 
Had a few goes at loading Roy's reference article into the AlphaSims .air file but gave up after getting the tables all messed up!!

So I copied Dave Garwood's FSX Hunter FGA9 .air file tables 1502 to 1507 into AlphSim's .air file using Aircraft Airfile Manager which seems to work for I now have the ground idle at 2500rpm but the max. rpm has now increased to 8350rpm and rising with the JPT staying at 600*C at idle but slowly decreases with height to 450*C to 8,000'.

So I'm nearly there only need a bit of help to tweak these files until I get it spot on. (never had this trouble working on the real Hunter adjusting ground and flight idle or max)!!!
 
Hey!
Anybody who has a good air-file for Alphasims Hunter in FS9, to be used as an AI aircraft?
Jive1 - Belgium
 
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