Engine failure v2+15

[Olendirk]

Hey,

what if you have an engine failure and the commanded speed by FD is e.g. v2+12. Are you allowed to do the turns with 30degrees of bank? in this example was the takeoff with flaps 5.

Thanks

OD

[Empty Cruise]

In short...

...no

Cheers!

[Olendirk]

why??

any explanation

[BOAC]

Probably not

Well, for a start you have not specified the aircraft type. Certainly for a 737 the minimum speed at which you should use more that 15 deg bank is V2+15, regardless of flap setting. Presumably V2+12 is the speed at failure? In which case you either maintain it at 15 deg bank or increase IF POSSIBLE to V2+15. Your EOSID should either cope with all speeds up to +25 or specify your actions.

[Olendirk]

so its like: speed above v2+15 i can use up to 30 degrees of bank on a 737,it doesnt matter one or two engines right?

bye!

OD

[BOAC]

Glad we helped.

[Olendirk]

muhauuaha Thanks!

[Old Smokey]

Originally Posted by Olendirk

so its like: speed above v2+15 i can use up to 30 degrees of bank on a 737,it doesnt matter one or two engines right?
bye!
OD

Olendirk, Yes and No. It depends upon whether you're speaking of All Engines Operation (AEO) or One Engine Inoperative (OEI).

YES - If your AFM/FCOM allows 30 degrees bank at V2+15, then this is in consideration of stall or manoeuvre margins, and, in the AEO condition, may be confidently used.

NO - In the OEI condition, manoeuvre at V2+15 at 30 degrees bank is still not a problem, but two further significant concerns arise -

(1) OEI performance is predicated upon a 15 degree bank angle limit to guarantee performance in this very performance limited situation. at 15 degrees bank, the aircraft is sustaining 1.035G, and is effectively 3.5% heavier. This "weight exceedance" is accounted for in establishig OEI 1st/2nd/3rd segment climb performance. At 30 degrees bank, the aircraft is sustaining 1.155G, and is effectively 15.5% heavier. Minimum 2nd segment climb performance would suffer accordingly, and clearance of obstacles would NOT be assured, but the difference between Gross and Net performance MIGHT save your life if you fly the aircraft as well as the test pilot.

(2) A great number of Special / Specific Runway Procedures (OEISID if you like) require turns to avoid obstacles laterally, with a small (7 degrees and 8 minutes) splay either side of the projected flight path. The inner turn radius assumes a bank angle of 15 degrees. If you were to make the OEI turn at 30 degrees bank the inner turn radius would only be 46.4% of that considered, taking you out of the protected area and into an area of unknown, and unconsidered obstacles. Even flying better than the test pilot won't save your butt here.

Regards,

Old Smokey