For standard procedures, see the Checklists tab.
Speeds vary widely depending on temperature,
pressure, altitude, wind, takeoff weight,
runway length, runway slope,
and runway conditions.
Pilots calculate speeds and fuel load
using complicated charts and tables.
The speeds below are approximations.
All specifications assume no changes to dynamics or
default loading as provided in distribution.
FS9/X FLIGHT DYNAMICS OPTIONS
ALL SET TO MAX REALITY and IAS option set
(not "true".)
!!!! DO NOT EXCEED: !!!!
-> +5.5 deg pitch above 60Kft or Mach 3 (high drag/dynamic stall)
-> Mach 3.45 (overspeed)
-> 500 KEAS (overspeed)
-> Under 310 KEAS level or climbing while supersonic
-> Less than 6100 RPM over Mach 1.5 (compressor stall)
-> 427C CIT
!! AVOID: !!
-> Under 365 *KEAS* while descending above Mach 1.5
-> COG out of published limits
-> Static temps at cruise warmer than -50C or
colder than -75C.
-> Atmospheric Pressure under 29.45
-> Speed/COG with level Pitch Trim
more nose down than -1.5 (rear heavy)
Slow down, climb or pump forward if trim warning.
-> Less than 0 deg AOA level cruise
-> Derich OFF in warm temps or high mach
Climb Schedules:
The SR-71 uses two climb "schedules" (or speeds.) Which one you use
depends on the type of flight you are making.
400 KEAS is used for longer flights where fast climb and fuel
saving is more important than speed.
450 KEAS (normal) is used when speed is more important
than fuel range and altitude during the climb.
Both start out after take off using the usual speed
restrictions (if any) or 400 KEAS.
In the Mach climb (or after the Dipsey Doodle) the pilot
will set an initial 470 KIAS on the AP bug for a target of 400
KEAS OR 530 IAS on the AP bug for an initial target of 450 KEAS, then
activate KEAS Hold when crossing these speeds.
Please consult the provided HTML manual for additional information.
---- MISC SPEC ----
Typical Static Temp operating range at 80Kft:
-50C to -75C
Note: Mach Cruise outside this range will have
noticeable impact on eng power and fuel efficiency.
Wing Span: 55 ft 7 inches
Total Length: 107 ft 5 inches (including probe)
Total Flight Simulator aircraft weight
with full fuel:
172,000 lbs.
Thrust at sea level (per engine):
32,500 lbs static.
45,000 lbs W/AB.
Fuel Rate Idle (total):
4K-6K lbs/hr
Fuel Rate (Full AB Take-off):
40-50K lbs/hr
Fuel Rate Cruise:
35K - 40K lbs/hr
---- FLIGHT LIMITS and BALANCE ----
Max Taxi Speed:
40 MPH (35 KIAS)
Min Take Off Runway length: 9,000ft.
(full weight with reheat)
The minimum permitted takeoff run and landing
distance available: 2,000m (8,000 feet).
Min land Runway length: 7000ft @MLW
Typical Take off distance (45K lbs fuel):
4,800ft
Max Climb from Take Off:
10,000ft/min (AP) or 11,810 ft/min manual.
Normal Cruise Speed (Vc):
400 KIAS/350 KEAS (Mach 3.2) @ 80,000ft.
Typical Cruise RPM: 7050-7150
Descent Speed:
365 KAES while above Mach 1.5
Descent Rate:
up to -6200 ft/min while above Mach 1.5
VMO - Maximum Operating Speed (KIAS):
500 KEAS @ 65K ft
vL - Design Speed:
350 KEAS (400 KIAS), Mach 3.20
MMO - Maximum Operating Speed (Mach):
Mach .65 - 1.07 (5,000' - 32,000' MSL)
1.75 - 2.0 (44,000' - 50,000' MSL)
3.32 (51,000 - 85,000' MSL)
Model Overspeed:
500 KEAS, 556 KIAS, Mach 3.45
Dynamic Mach Stall:
Speeds near Mach 3 but below 280 KIAS
Note: Panel Warning when above Mach 2.6 but
below 300 KIAS.
Compressor Stall:
Under 300 KIAS while above Mach 1.5
Under 350 KEAS while descending.
Eng RPM under 6100.
VLA - Lowest Authorized Speed (level):
175 KIAS (5,000' - 20,000' MSL)
Min Turn Speed:
220 KIAS (level)
G Limits (spike fully extended):
+3.2
-1.9
Note: Spike retraction increases
G force damage sensitivity by ~ 5%
Flight AOA Limits:
Max below 25K ft = 18 deg
Max Subsonic 25K+ ft = +10 deg
Max Supersonic 25K+ ft to 70K ft = +8 deg
Max Supersonic 70,000+ ft = +6 deg
Max Turbulent penetration speed (subsonic):
350 KEAS
Typical Subsonic Climb Speed:
400 KEAS
Climb abort speed:
350 KIAS
Minimum AOA during climb:
.5 deg @ M2.6, never below zero when faster.
Typical Supersonic Climb:
350 KEAS Hold or 400 KEAS Hold
COG:
Modeled MAC in FS2004 = 60.5 ft (wing + forward fuselage chine).
Typical range: +17 to + 24
Max at cruise: +25% (automatic system peaks +24.97%)
Max Take off and land: 22 %
Max below Mach 0.9: +24%
Min COG above Mach 1.8 and 11,570 lbs fuel: +17%
Min below Mach 1.8 and 11,570 lbs fuel: +14.5
Mach 3.30 = 24.3 % MAC
Ideal COG Table:
Gross Weight lbs %
130-140K 20-22
120-130K 22-24
90-120K 24+
---- ENGINE ----
Spike:
Subsonic to Mach 1.69 = spike full forward zero inches (F5)
Mach 1.7 to Mach 2.04 = 1 - 6.4 inches
Mach 2.05 to Mach 2.42 = 6.5 = 12 inches
Mach 2.43 to Mach 2.75 = 13 - 19.4 inches
Mach 2.76 to 3.10 = 19.5 - 25 inches
Mach 3.11+ = 26 inches
(F8 full engine spike retraction)
EGT:
Max start temp= 565 C (near 95 deg F static)
Target Optimum performance EGT:
775 deg F - 805 deg F
Normal Cruise Range: 780 - 820C
Continuous Limit: 830C
Emergency Zone Start = 805 C | up to 15 minutes
Emergency Zone Limit = 845 C |
Red Zone : 900 C up to 2 minutes
950 C up to 15 seconds
Note: Panel warnings at 845C and 900C
Optimum Descent EGT:
700C (1,292 F)
Max Inlet Temperature (CIT):
427C (801F)
Typical M 3.2: ~ 350 C
Max Eng RPM:
7450
Oil Pressure:
Min: 35 PSI
Normal: 40-60 psi
Max Oil Temperature:
177C
---- ----
---- TAKE OFF ----
Maximum authorized takeoff weight:
172,000 lbs.
Max Gear Retraction/Extension/Down Speed:
350 KAES/320 KIAS/Mach 0.7
V1 - Generalized Runway Decision Speed:
150 - 160 KIAS
VR - Generalized Rotation Speed:
180 (minimum) - 220 KIAS
V2 - Generalized Engine Failure Screen Speed:
190 - 220 KIAS
Take Off Speed (MLW):
220 KIAS (+10 deg pitch)
200 KIAS 22% COG 58,600 lbs fuel.
180 KIAS 45K lbs fuel.
---- LANDING ----
Normal Landing Weight:
10,000 lbs fuel or less
Minimum Landing weight:
5,000 lbs fuel
Max T&G - Touch and Go weight:
22,000 lbs fuel
MLW - Maximum Landing Weight:
215,000 lbs (40,000 lbs fuel)
Note: AP GS track is very unstable at this weight.
VREF - Target Landing Speed (KIAS): |
Fuel lbs | Appr Spd | TD Spd |
<= 10K | 175 | 155 |
20K | 185 | 165 |
25K | 190 | 170 |
30K | 195 | 175 |
40K | 205 | 185 |
Landing Threshold Angle of Attack:
9.5 degrees (Att Ind pitch.)
10.5 AOA
Max Threshold AOA:
+14 (tail strike)
Max Maneuver AOA:
+8 on turns (225 KIAS) +9 on final.
Max Landing Sink Rate:
8 FPM
Touchdown Throttle Setting:
Idle
Landing Crosswind Limit:
35 Knots @ 90 degrees
Drag Chute: activatedon the ground with "shift-/" (spoiler arm keypress.)
Pre-arm: shft-/
Flight not possible while activated.
Max Chute Deploy Angle:
10 deg
Max Chute Deploy Speed:
210 KIAS
Chute Deploy Timing:
On Mains Contact
Chute Deploy Time:
5 seconds
Chute Deploy force:
0.5G
No Power Glide (80K ft Mach 3.2):
375KIAS @ -11,600 ft/min
6 minutes to 10Kft (102nm)
Dipsey Doodle (modified for FS9/FSX):
After refueling, set AT hold for speed Mach .9,
engage AB and set climb rate to 2000 ft/min.
Between 30K-32K ft increase AT speed bug to 405.
Passing M0.95 and 32Kft set AT bug for 440 and
reduce climb to 500ft/min.
When passing M1.05. slowly increase climb to
+1500 until M1.15 then increase climb to
desired rate using 400 KEAS or 450 KEAS.
Real world tanker descent (assumes M3.2 80Kft):
After starting descent, switch to KIAS Hold
and slow gradually until crossing KEAS and click
KEAS Hold.
Tanker is expected 100 miles this side
of runway.
-Set descent alt (target) in AP for tanker alt.
-Gradually set initial dec rate to 4500, Mach 3.2.
-Crossing -2500 ft/min on VSI disengage AB.
-Follow published descent profile for alt and distance
to target.
-Typical descent rates are -4500 to -6200 ft/min.
-Below Mach 1.50 maintain 400 KIAS.
Typical Descent Target Profile: |
Land/Refuel
Distance: | Alt: | Spd: |
395/308 | 90Kft | M3.2/365 KEAS |
325/238 | 80K | M3.2/365 " |
282/190 | 74K | 365+ KEAS |
264/170 | 70K | 365 |
220/116 | 60K | 365 |
190/70 | 50K | 365 |
163/40 | 40K | 400 KIAS |
150/00 | 35K | 380 KIAS, M0.90 cruise, or M0.85 for tanker |
--- If using tanker, start rendezvous operations. ----
-Typical landing final approaches start 20 miles out 4,000 ft
above runway altitude.
Re-Fuel Constraints:
o 270 - 350 KIAS
o 24K ft - 36K ft Both engine fuel valves must be enabled (engines are operating normally.)
NOTE: For explanations of speeds used on this tab,
see "V-speeds" in the Glossary section of Help.
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