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Questions tagged [engine-testing]

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14 votes
2 answers

Did I witness an engine test for a 757 at MAN?

A while ago (Summer 2020) I was walking near MAN airport (UK) and saw a 757 taking off. There was a peculiar event during takeoff and I'd love to know what it was. Once airborne at about 1000 feet (...
JamesG's user avatar
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8 votes
1 answer

What are those tiny circles on fan blades of Trent 1000?

From Sam Chui's video, there are tiny circles on the surface of three fan blades of next generation Trent 1000 engine. Why aren't they present on remaining fan blades? Below comments suggest they are ...
Auberron's user avatar
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2 votes
1 answer

Why can’t the newest high-bypass turbofans run at their EPR, temperature, and RPM limits simultaneously at sea level?

The General Electric GE9X turbofan (used on the 777X), unlike the vast majority of turbofans before it, did not undergo the traditional triple-redline test (where the engine is run for a prolonged ...
Vikki's user avatar
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