Page 2-10
Pilot’s Operating Manual
Original Issue: Feb, 2002
Sub-section 2
ENGINES
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
N
1
RPM DISPLAYS
The N
1
indication provides engine RPM measured against a fixed 100% value and shares the same
scale with the ITT indication.
Normal scale range for the N
1
portion of the scale is 20 to 100% with an overlimit scale to 110%. Gray
tick marks are at 20, 40, 60, 80 and 110%. There is a red radial tick mark at the 100% normal redline.
The N
1
digital display appears below the N
1
legend and pointer icon, to the left of the N
1
indication. The
N
1
digital display has a range of 0 to 110%.
The normal limit for N
1
is 100% and the N
1
pointer and digital read-out are green when N
1
is within
100%. If N
1
is between 100.1% and 103.0% (Transient Limit) for less than 5 seconds, the N
1
pointer
and digital read-out turn yellow. If N
1
exceeds 103.0% (Redline) or exceeds the Transient time limit, the
N
1
pointer and digital read-out turn red.
The N
1
pointer is removed and four yellow dashes and a decimal point are displayed for the digital read-
out if all sources of N
1
are flagged.
NORMAL LIMIT
(Green)
TRANSIENT LIMIT
(Yellow)
REDLINE LIMIT
(Red)
N
1
≤
100.0%
100.1%
≤
N
1
≤
103.0%
for less than 5 seconds
100.1%
≤
N
1
≤
103.0%
for 5 seconds or longer
or
N
1
≥
103.1%
