BRITANNIA Mk253 LIMITATIONS
 
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AIRFRAME LIMITATIONS

 

 

 

NEVER EXCEED SPEED Vne

288 KT  or 0.65 MACH

NORMAL OPERATING SPEED LIMIT Vno

258 KT or 0.60 MACH

AUTOPILOT MAX OPERATING SPEED                     

258 KT or 0.60 MACH

MANOEUVRING SPEED, FULL AILERON/RUDDER

203 KT

FLAPS    UP – 15’

210KT

                15’ – 30’

180 KT

                30’ – 45’

160 KT

UNDERCARRIAGE  EXTENSION

180 KT

                                  WITH U/C EXTENDED

200 KT

LANDING LAMPS  EXTENSION

165 KT

                                 EXTENDED

210 KT

CROSSWIND MAX FOR TAKEOFF

20 KT

                         MAX FOR LANDING

25 KT

FUEL JETTISONING MAX SPEED

210 KT

MAXIMUM TAKEOFF WEIGHT

185000 LB

MAXIMUM LANDING WEIGHT

140000 LB

 

 

POWER PLANT LIMITATIONS

 

 

 

OIL TEMPERATURE MAX FOR STARTING

35’C

                                     MIN FOR OPENING UP

5’C

                                     MAX IN FLIGHT

110’C

                                     MAX BEFORE TAKEOFF

90’C

OIL PRESSURE NORMAL

70 - 80 PSI

                             MIMIMUM ABOVE 10000 CRPM

50 PSI

PROPELLER LIMITATIONS

 

                        PROHIBITED FOR CONTINUOUS

360 – 560 PRPM

                        INFLIGHT MINIMUM

850 PRPM

                        MAX CONTINUOUS

920 PRPM

                        MAXIMUM PERMISSIBLE

1000 PRPM

ENGINE LIMITATIONS MAX DRY

11775 CRPM   815 PSI  

                                        MAX WET

12000 CRPM   815 PSI

                                        MAX CONT BELOW FL150

11500 CRPM   780 PSI

                                        MAX CONT ABOVE FL 150

11650 CRPM   780 PSI

                                        MIN FLIGHT IDLING                7900 CRPM @ 850 – 920 PRPM

                                        MAX REVERSE

11500 CRPM for 1 MIN