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Post by Deleted on Oct 20, 2014 14:53:53 GMT -5
Below is a link to a short film of a BOAC DC4 Argonaut arriving at Nairobi airport in 1958. Image quality is not wonderful, but the pilot has shut down port and starboard outer and is taxying in using the inboard engines only. In William Wyler's 1943 film 'Memphis Belle' Captain Robert Morgan taxies in from the B17's twenty-fifth mission using the outboard engines only. Does anybody know how common it was for the captains of four-engined aircraft to do this kind of thing? Ken www.youtube.com/watch?v=Kv0RNkU84zQ |
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Post by Dennis the menace on Oct 20, 2014 15:11:39 GMT -5
I clearly remember Southern Airways shutting down the number one engine on Martin 404s while taxiing up to the terminal, so that the prop was stopped by the time the pilot was in the parking spot and set the parking brakes. I don't know if it was their policy, but it seems to have been done every time when pulling up to the terminal. It may have been just a pilot's decision to save a bit of time to help keep the schedule, and perhaps the company didn't have a problem with that.
In FS, I just positioned a Pan Am DC-7C from the big green "Aloha" terminal to the MATS terminal over at Hickam AFB by running on just the inboard engines. Had to run them at a much higher rpm to keep the aircraft moving than with all four running.
I used to fly on Western's Electras out of Long Beach (KLGB). I remember them shutting down the outer engines right after turning off of the runway at Long Beach, but they didn't do that at San Francisco or Los Angeles.
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Post by volkerboehme on Oct 20, 2014 15:16:47 GMT -5
Hi,
Not uncommon, I think. Easier to keep ground speed under control. Depending on how the aicraft would react on differential power, it might influence the decision to shut down either inboard or outboard engines.
Best regards,
Volker
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Post by Tom/CalClassic on Oct 20, 2014 15:56:44 GMT -5
It was common using piston engines since it allowed you to taxi at higher power levels and kept the engines from fouling. I believe using turboprops it was easier to keep the plane from speeding up too much.
BTW, I have never seen an airline flight manual mention this in the After Landing section, so it doesn't appear to be typical airline policy.
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Post by Defender on Oct 20, 2014 16:26:56 GMT -5
Inboard/outboard choice might also depend on which power generators and hydraulics.
Bill
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Post by Tom/CalClassic on Oct 20, 2014 18:02:31 GMT -5
Correct, it does.
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Post by capflyer on Oct 20, 2014 18:43:01 GMT -5
It does for some aircraft, but there is a bigger reason that determines it. The aircraft's steering has the biggest effect on choice. If the airplane has a castoring nose/tail wheel, you always taxi on the outboards and never on just one engine. This is why you see B-17s, B-24s, B-29s, and Lancasters all using the outboards - it gives extra "leverage" so you're not wearing out the brakes.
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Post by aharon on Oct 20, 2014 19:19:56 GMT -5
After arriving at airports, Constellations used 2 out of 4 propellers to taxi to gates.
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Post by johnhinson on Oct 21, 2014 4:48:38 GMT -5
I recently obtained a DVD of Heathrow Airport in the sixties. Nearly all four-engine planes taxied in on two engines, and some taxied out on two too.
I've not tried it in FS yet, I'm not sure that the simulator would reproduce the effect accurately.
John
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Post by Maarten on Oct 21, 2014 7:47:52 GMT -5
I recently obtained a DVD of Heathrow Airport in the sixties. Nearly all four-engine planes taxied in on two engines, and some taxied out on two too. I've not tried it in FS yet, I'm not sure that the simulator would reproduce the effect accurately. John In fact it doesn't. I tried it many times but had to push the throttle that far forward that it didn't look nor sound realistic at all. Cheers, Maarten |
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Post by FSMuseum on Oct 21, 2014 9:07:33 GMT -5
A shame really. Perhaps it has to do with the higher-than-real friction values in FS2004? Perhaps the FDE could be modified to make up for it?
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Post by Defender on Oct 21, 2014 9:23:42 GMT -5
At max landing weight at least our Super Connie is happy to taxi with inboards only, a bit above 2000 rpm to get going, a bit under to maintain 15/16 kts.
Dennis, was it perhaps slightly downhill from the Long Beach runway to the ramp?
Bill
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Post by Dennis the menace on Oct 21, 2014 14:09:25 GMT -5
No, I believe that Long Beach airport (KLGB) is mostly all flat. I suspect they cut the engines because it is not very far from the usual runway turnoff to the parking apron, and that they wanted to get the airstairs down and baggage doors open as soon as the set the parking brake. Western didn't keep its Electras very long at Long Beach, ten minutes at the most. So I think every minuted counted.
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Post by bushpounder on Oct 21, 2014 22:04:44 GMT -5
They (US AIR) taxi in on one now. It's a fuel-saving item.
Don
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Post by milspecsim on Nov 12, 2014 17:53:13 GMT -5
I know that some airlines cut the outer engines at some airfields to prevent FOD.
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