[jhb_airlines] Re: Autopilot APPR HOLD problem

  • From: Mike Lucas <mhlucas@xxxxxxxxxxxx>
  • To: jhb_airlines@xxxxxxxxxxxxx
  • Date: Mon, 17 Oct 2005 17:15:21 +0100

The panel is for Citation X, FS2004.

Mike L

Bones wrote:
I don't have any values for the CJ2 here and it could easily have different
flap settings to the CJ1. The existing aircraft.cfg values are 0, 15 and 45
as you note and would seem to follow the current trend on some aircraft of
absolute minimum flap settings (up, take off and land).

The CJ1 I've had the pleasure to fly in is different and it has flap values
of 0, 15, 35 and 50. Here are the book figures:

T/0 Weight    15 deg Flap Setting   0 deg Flap Setting
                 V1  Vr  V2            V1  Vr  V2
10600           107 107 111           113 113 119
10000           102 103 108           109 109 115
9500             98 100 105           105 105 113
9000             97  97 103           102 102 110
8500             97  97 103            98  98 107
8000             97  97 104            98  98 107
7000             97  98 106            98  98 109

Stall Speeds

Zero Angle of Bank, Landing Gear UP or Down, KCAS
              Flap Position
Weight     Land   15deg    UP
10600       86      91     98
10000       83      89     95
9500        81      87     93
9000        79      85     91
8500        77      82     88
8000        75      80     86
7500        73      78     83
7000        70      75     80

Take-Off 0 and 15 degs flaps
Landing Approach 15 degrees
Full Flaps Land 35 degrees
On Landing Flaps 50 degrees...used to help braking

Note that 50 flap is only used as an after landing speed brake so we really
only need 0, 15 and 35 in FS. However that is for the CJ1 and as there are
so many versions of the Citation out now (which I have totally lost track
of) it could well be that other versions have different flap settings. The
Citation X is quite a different beast to the little CJ1!

Also note that in the CJ1 figures above the Max Landing Weight is just
10600lb whilst the CJ2 is up at 15200lb. I would therefore expect the speeds
to be a touch higher. For the CJ1 a rotate speed of about 105/115kts seems
average and an approach speed of 106kts at max weight looks good (as Va = Vs
x 1.23). I'll hunt around and see if I can find the CJ2 figures but expect
them to be a touch higher than these.

You can easily alter the aircraft.cfg values if you wish. As a reminder put
the original values in the comment section so you remember them - they can
go anywhere after the // symbols. Just out of interest did it say which
variant of Citation the panel was for?

bones

-----Original Message-----
From: jhb_airlines-bounce@xxxxxxxxxxxxx
[mailto:jhb_airlines-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Lucas
Sent: 17 October 2005 12:29
To: jhb_airlines@xxxxxxxxxxxxx
Subject: [jhb_airlines] Re: Autopilot APPR HOLD problem


Bones

I was trying to find out what flap settings exist on the real-world
Citation.  If there are 4 (0, 5, 15, 35), as the panel I am now using
would seem to suggest, can I modify the current entry in aircraft.cfg -

[Flaps.0]
type             = 1          // 1 - tail, 2 - lead
span-outboard    = 0.8        // 0.0 .. 1.0
extending-time   = 5          // seconds
system_type      = 0
flaps-position.0 = 0          // degrees
flaps-position.1 = 15          // degrees
flaps-position.2 = 45         // degrees
damaging-speed   = 250        // KIAS
blowout-speed    = 300        // KIAS

by inserting an additional line for flaps 5, and amending flaps 45 to
flaps 35?  Or is such tinkering another minefield .... ?

Mike L

Bones wrote:





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