How would an aircraft like the Tupolev Tu-154 “Careless”, the Boeing 727, or the Hawker-Siddeley Trident handle the loss of one of the rear mounted engines?
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1$\begingroup$ Why are you concerned about these ones, and not about the DC-10, MD-11 or L-1011 TriStar where, with 2 of the engines mounted on the wing, the asymmetry caused by thrust imbalance is much larger? $\endgroup$Gabriel– Gabriel2026-04-29 16:41:26 +00:00Commented yesterday
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11$\begingroup$ @Gabriel Why does the OP have to be concerned about the things you are? It's their question and they have the right to ask what interests them $\endgroup$Peter M– Peter M2026-04-29 16:59:52 +00:00Commented yesterday
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$\begingroup$ What's your doubt exactly? If an OEI on a 3 jets is physically different than on a twin jet? Or if the procedure to follow in case of OEI is different? Or something else? $\endgroup$sophit– sophit2026-04-29 20:37:01 +00:00Commented yesterday
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2$\begingroup$ @PeterM, who said that the OP has to be concerned about the things I am? It is their question, they can ask whatever they want, and I can be curious and ask what was the motivation. The OP specifically asked about "thrust imbalance", so I was curious about why the OP was restricting the question to the trijets with the LEAST thrust imbalance effect. That's all. I didn't say what the OP has to or doesn't has to be concerned about, or questioned their right to ask whatever you want. Please don't put words in my mouth. And, on the same token, don't tell ME what I can or can't ask to the OP. $\endgroup$Gabriel– Gabriel2026-04-30 14:40:30 +00:00Commented 19 hours ago
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2$\begingroup$ And to the 8 persons that upvoted @PeterM, please exercise some critical thinking. And no, I am not questioning your right to upvote whatever you want. Peter has the right to say any fallacy he wants, and you have the right to upvote it. $\endgroup$Gabriel– Gabriel2026-04-30 14:45:40 +00:00Commented 19 hours ago
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1 Answer
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In general, a rear-engine aircraft (trijet or not) will handle engine loss quite well. Certainly, the dead engine will produce some drag and there's a thrust asymmetry. However, all the engines are very close to the longitudinal axis, which means the lever arms are so short that the effects are much smaller than in an aircraft with more typical under-wing engines. The pilot will need to put in some rudder trim, but not much compared to most airliners.
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$\begingroup$ +1, although pedantically, close to the long axis matters less than thrustline close to the center of drag. $\endgroup$Camille Goudeseune– Camille Goudeseune2026-04-29 18:59:48 +00:00Commented yesterday