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Questions tagged [lockheed-tristar]

Lockheed's only jetliner, produced from 1968 until 1984, and the last commercial airliner it ever produced.

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18
votes
2answers
2k views

Why is the S-duct intake on the Tu-154 uniquely oblong?

Is there an advantage to the oval/elliptical shape of the Tu-154's S-duct intake? It appears to be taller and an overall different shape than the side-mounted cowlings. This doesn't appear to be a ...
12
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1answer
642 views

What were the advantages of the L-1011 AoA sensor design?

The Lockheed L-1011 had an unusual type of AoA sensor. Instead of the usual vanes it used a tube with two rows of holes in it about 90° apart. A diaphragm sensed the pressure differential between the ...
18
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5answers
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Why was a Lockheed L-1011 chosen by Orbital ATK for its Pegasus launches?

Not sure whether this fits better here in Aviation, or would be better suited for Space, but since the question is about a terrestrial aircraft, I'll start it out here. The topic of my question is ...
2
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0answers
80 views

What is a possible reason for an L-1011 wing fuel tank overflow? [duplicate]

I was on a TWA Charter flight from Boston to Montego Bay Jamaica in 1989. During pushback from the gate, the right wing began to leak jetfuel (like gallons pouring out of the wing). They stopped the ...
8
votes
1answer
357 views

Why were the TWA TriStar middle seats smaller than the aisle seats?

I was watching an old TWA advert and a question came up: why were the L-1011 TriStar middle seats smaller than the aisle seats?
8
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2answers
2k views

Where is the APU in the case of an S-duct (like the L-1011)?

This question asks about the S-duct of the L-1011 Tristar. Fooot's answer shows a cut-out of the L-1011. Looking at this cut-out, I'm wondering: If the engine is at the 'normal' location of the APU, ...
16
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4answers
6k views

Why is the nacelle outlet of the tail engine of the L-1011 Tristar lower than the engine itself?

I've noticed that the nacelle outlet of the Lockheed Tristar is situated below the engine itself. It is at the end of the fuselage. The nacelle outlet of the tail engine of the DC-10 on the other hand,...
19
votes
2answers
3k views

Orange object on back of jet-engine pylons, what is it?

Watching this Video of a L-1011, I noticed an orange/brown object on the back of the jet-engine pylons I never saw before. What is it? What's the purpose of it?