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Issued with A.L.1.					A.P. 4503D-P.N.
							 Pilots's Notes

			    APPENDIX I
    CHARACTERISTICS OF SABRE MK. 4 WHEN FITTED
		   WITH FIXED LEADING EDGE

        I.  Introduction

	    The removal of the slats has improved the high altitude
	    turning performance in that the pre-stall buffet is delayed
	    until a slightly higher G.  A small increase in speed and
	    rate of climb has also resulted.  The low speed behaviour
	    has been slightly modified and the revised figures and
	    procedures are given below.

        II. Check lists

       (i)  External checks
	    Before taxying, check that the small portion of the
	    leading edge of the wing root, removed for entrance to
	    the cockpit, has been replaced. Check both wings for
	    this item.
       (ii) Take-off checks
	    (a)  The check list for take-off is unchanged except for
	         the fore and aft trim.  To trim the aircraft for take-
	         off, operate the tailplane trimmer until the indicator
	         light comes on, then trim again to move the control
	         column 1½" to 2" in front of the indicated position.
	    (b)  Full flap should be used for every take-off, regardless
	         of the weight.

        III.Take off
	         
        (i)  The take-off is straightforward but the speeds given
	     below for raising the nosewheel and unsticking the air-
	     craft must be observed.
				    Nosewheel
		 A.U.W.	         Lift-off speed	     Unstick speed
		  (lb.)		     (Knots)	       (Knots)
		 16,000		       105		 120
	     (No drop tanks)
	         18,000		       115		 130
		 20,000		       125		 140

A.L.2         | (ii)    To ensure that the attitude does not become dangerously nose-
Appendix I  |         up, the nosewheel must be lifted at the correct speed and held
Para.         |         just clear of the runway until the unstick speed is reached.  In
  III (ii)      |         marked nose-up attitudes the drag is large enough to prevent
                |         further acceleration and the aircraft cannot become properly
                |         airborne.	         
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