[jhb] Re: Bizjet Query

  • From: Gerry Winskill <gwinsk@xxxxxxx>
  • To: jhb@xxxxxxxxxxxxx
  • Date: Sun, 25 Apr 2010 11:49:15 +0100

Not as hard as I thought it might be and now reasonably well sorted.

Next job to do a panel, based on the original.

Gerry Winskill

Gerry Winskill wrote:

Right, next gripping installment.
I cured the Autopilot and APPR acquisition problems, simply by substituting the AUTOPILOT section from my tweaked Citation's Aircraft.cfg. That left me with another serious problem. The published Dirty Stall Speed for the Gulfsream is 96kias. That leads to a probable Vref of 128kias. If I set that as the speed on ILS finals then the attitude is significantly nose down and a nosewheel touchdown becomes unavoidable.
At Bones' suggestion, I recorded the actual dirty stall at maximum weight. It was 86kias and that gives me a much lower Vref of 114. If I fly finals at that speed, then the attitude is normal and touchdown attitude OK. It also looks painfully slow!
So, it's back to trying to change the unrealistic stall speeds, which also result in unrealistically low Vr at takeoff. I've tried adding a line to the Flaps sectio Lift_Scalar=0.5, to see what that does. 

I may be gone for some time.....

Gerry Winskill






Gerry Winskill wrote:
I'll try that weight as well, though without too much optimism. I also check at a likely minimum landing weight and that stall came at a pretty unlikely 70kias.
It's also dodgy in autopilot. When I try an APPR ILS capture it seems unable to capture, or hold, the glideslope. I wouldn't have thought that was influenced by anything but the AUTOPILOT section of Aircraft,cfg and that looks quite normal. To eliminate Panel oddities I'm f testing whilst using the Panel I made for the Citation.
It's also odd if I connect the AP and Alt on takeoff, pitching up to a much higher angle than Aircraft.cfg dictates.
If anyone would like to try it, to see if it behaves any better on AP, just shout and I'll put the aircraft on my download site. 

Gerry Winskill




Fossil wrote:
Try again at MAUW. Tests are always done at MAUW in case of worst scenario 
(aircraft has a problem and needs to land well above MLW).

bones
bones@xxxxxxx


-----Original Message-----
From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On Behalf 
Of Gerry Winskill
Sent: 24 April 2010 17:58
To: jhb@xxxxxxxxxxxxx
Subject: [jhb] Re: Bizjet Query

First problem.
To set up one of my gauges I need a number of stall sppeds. One is Stall Dirty, with gear down and max flaps. I identify the speed at max landing weight and with minimum acceptable fuel load. The real Gulfstream 550 is said to have a dirty stall speed, unidentified weight, of 112 ktas. I'm down to 80 kias, at 9000 ft, before it stalls. Bit of a reallity gap then!
Is there anything in the Aircraft.cfg that I can tweak, to increase stall speed? 

Gerry Winskill

Gerry Winskill wrote:

Just found one, for FSX, on Surclaro.

Just about to record performance data. Well, start the job.

Gerry Winskill

Frank Fisher wrote:

Gerry
If I recall, I downloaded a freeware version, which was an updated FS9, and to be honest looked liked an updated FS8, did not stay long on my drive. Try this, I think from Flightsim.com gulfivx2.zip (that is an i not a one) 
Frank
----- Original Message ----- From: "Gerry Winskill" <gwinsk@xxxxxxx>
To: "JHB Restricted" <jhb@xxxxxxxxxxxxx>
Sent: Friday, April 23, 2010 8:59 PM
Subject: [jhb] Bizjet Query
For IFR flights I normally use the Citation, since a bizjet seems a more 
logical way of flying non scheduled routes than heavier metal.
Now, though, I'd like to use something a bit larger, so the Gulfstream V springs to mind. But, I can't find one. Anyone know of a version for FSX? 

Gerry Winskill
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