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catalyst
11-15-2005, 10:09 AM
I havent been able to find a answer to this. Can a larger say KC-135 fly with only two engines enabled. I am sure it would lose altitude, but would it be able to operate for a given period of time?
JoaMei
11-15-2005, 10:26 AM
Probably yes, but this only when it has at least one operating Engine on each side. If both engines on one side are off it gets very difficult.
Frens
11-15-2005, 10:28 AM
yes, that's one of the reason aircrafts/planes have more than one engine


btw, the new kc-135s provides 30 percent more powerful engines
catalyst
11-15-2005, 10:53 AM
If flying with 2 on the same side at max thrust? theoretically it could still 'fly'. But I read about a accident in 1991 with a RAAF B707 crashed whilst practising this. the BOI paper I found didnt seem to allude to the fact that a B707 could or couldnt fly like this.
Frens
11-15-2005, 11:06 AM
If flying with 2 on the same side at max thrust? theoretically it could still 'fly'.

I'm not a pilot, but I think it's theoretically possible. but as JoaMei said it would be very very hard to do.
DeltaWhisky58
11-15-2005, 02:35 PM
I haven't been able to find a answer to this. Can a larger say KC-135 fly with only two engines enabled. I am sure it would lose altitude, but would it be able to operate for a given period of time?

http://www.pcfltd.co.uk/images/mra4.jpg

Our (i.e. RAF) Nimrod aircraft - and previously Shackletons - do this on a regular basis. The Nimrod which is a long range maritime patrol aircraft, cruises at high level on four engines until it reaches its patrol area, and then routinely shuts down two of its four engines to maintain economic patrol speed. the pairs of engines are regularly swapped over to keep each pair warm thus enabling fast power-up should the need arise.

I believe there is no plan to change this practise once the new MRA.Mk.4 aircraft enters service soon.
HoboWithAK
11-15-2005, 10:07 PM
http://www.pcfltd.co.uk/images/mra4.jpg

Our (i.e. RAF) Nimrod aircraft - and previously Shackletons - do this on a regular basis. The Nimrod which is a long range maritime patrol aircraft, cruises at high level on four engines until it reaches its patrol area, and then routinely shuts down two of its four engines to maintain economic patrol speed. the pairs of engines are regularly swapped over to keep each pair warm thus enabling fast power-up should the need arise.

I believe there is no plan to change this practise once the new MRA.Mk.4 aircraft enters service soon.

Yes, but the probably don't shut down both engines on the same side. And even if the did, the engines are much closer to the fuselage, although i'm sure it would still be problematic. If I had MSFS2004 installed, i'd give it a try.
DeltaWhisky58
11-16-2005, 07:23 AM
Asymmetric flying of this kind is possible and is a regularly practised emergency procedure - I've been present on a Nimrod during such an exercise.

Clearly, with all of the power being on one side of the aircraft, this is not a manoeuvre of choice, but following an incident such as a SAM strike it may well be the only way of getting to the nearest friendly airfield.
catalyst
11-16-2005, 10:07 AM
On a B707 or a KC 135? Nimrod yes but 707/135?
Creeper
11-16-2005, 10:10 AM
edit, I was thinking for the KC-10, my FU.
Lose 2 engs on either side, Hmmm - 10% FLAPS, bump remaining engs to power level in order to maintain required flight heading, altitude etc, Trim rudder out with a ****load of pedal,drop fuel(if possible) do all this while performing air-restart procedures, and looking for the closet field.
Can be done.
BTW> what r the odds that 2 engs. on either wing go to ****? very-very slim, with the new CFMs in the fleet, a catastrophic occurrence would need to take place.
DeltaWhisky58
11-16-2005, 11:02 AM
On a B707 or a KC 135? Nimrod yes but 707/135?

Well our guys do it on the Sentry (E-3D), so why not the 707/135, same airframe. It's not easy, but it is possible and is practised.

I don't think it makes a huge amount or difference on any 4-jet a/c whether the engines are podded or in-wing.

Have you considered the likes of the B737/757/767/777 etc., Airbus 330/320 etc., all are twin jets - single jet flying in all of these is asymmetric flying and these guys fly long trans-oceanic routes, if you drop an engine mid-Atlantic you have to fly asymmetric or swim!