Would it be possible to build an engine twice the size of the Trent 900 in terms of physical size, i.e. doubling the diameter?

Let's assume that it's feasible to build an aircraft tall enough to install the engines. I will go on to ask about the extra heat at the engine core or hot sections of the engines but to run such an engine, would current materials be able to tolerate the extra heat? Would the larger fans tolerate the extra stresses if the diameter doubled?

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    $\begingroup$ Won’t be able to answer this myself, but do you mean twice the physical size (in terms of fan diameter etc.), twice the volume/weight, or twice the thrust? I assume that will make quite a difference in feasability. $\endgroup$ Feb 8 '18 at 17:03
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    $\begingroup$ Sure, just open up the drawing files, scale by a factor of 2, and then send it off to production. $\endgroup$
    – Ron Beyer
    Feb 8 '18 at 17:12
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    $\begingroup$ @RonBeyer it'll only be 8 times heavier, what could possibly go wrong? $\endgroup$
    – fooot
    Feb 8 '18 at 17:15
  • $\begingroup$ @fooot Plus they would have to put the aircraft on stilts to get the engine under the wing $\endgroup$
    – Ron Beyer
    Feb 8 '18 at 17:16
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    $\begingroup$ "As incomes rise, I think jumbos like the A380 would sell tickets at a premium..." The A380 has problems selling tickets at all, much less "at a premium". If Emirates doesn't order more aircraft, Airbus will most likely halt the A380 production only 10 years after its introduction. The 747-800 is having similar problems as it isn't being flown in passenger service by many operators anymore. $\endgroup$
    – Ron Beyer
    Feb 8 '18 at 17:23