zero thrust in a twin

[tgrayson]

I may not be recalling this correctly, but I think for transport category aircraft Vmc is determined with wings level (no sideslip) so weight would not have an effect or nearly as much as it would with 5 degrees of bank.

Wings level would result in a sideslip. Some amount of bank would provide a no-sideslip condition.

And yes, Part 25 does permit a 5 degree bank into the good engine:

§ 25.149 Minimum control speed.

(a) In establishing the minimum control speeds required by this section, the method used to simulate critical engine failure must represent the most critical mode of powerplant failure with respect to controllability expected in service.
(b) VMC is the calibrated airspeed at which, when the critical engine is suddenly made inoperative, it is possible to maintain control of the airplane with that engine still inoperative and maintain straight flight with an angle of bank of not more than 5 degrees.
(c) VMC may not exceed 1.13 VSR with—
(1) Maximum available takeoff power or thrust on the engines;
(2) The most unfavorable center of gravity;
(3) The airplane trimmed for takeoff;
(4) The maximum sea level takeoff weight (or any lesser weight necessary to show VMC);
(5) The airplane in the most critical takeoff configuration existing along the flight path after the airplane becomes airborne, except with the landing gear retracted;
(6) The airplane airborne and the ground effect negligible; and
(7) If applicable, the propeller of the inoperative engine—

 

[Dugie8]

I meant to say zero sideslip, a little slack, Ive been up for almost 24 hours!

Well that is two things check airmen have been wrong about now!!! Starting to question the validity of this padoras box of a hydraulic failure checklist we have that was created by these guys.....

Thanks for the info!

 

[seagull]

I meant to say zero sideslip, a little slack, Ive been up for almost 24 hours!

Well that is two things check airmen have been wrong about now!!! Starting to question the validity of this padoras box of a hydraulic failure checklist we have that was created by these guys.....

Thanks for the info!

I would say that the FCOM is going to be right, and the company is putting a lot of liability out there by deviating much from it!

 

[FlyinTim]

I use about 11'' in the twin-co for training

 

[Flysher]

i think i figured out why i was confused before, the learjet cant reach the high indicated airspeeds at 41000 that it can at 15 or 20000, due to the extremely thin air, hence the reason the AOA is higher up there. If anything i said there still demonstrates my lack of understanding in this matter someone please correct me, but i feel that i got it based on some things i just read.

 

[aviatorrbt]

i thought the same things.