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More like not turning. (notice the dude on the tarmack?)The inner set of turboprops seem to be turning at a different speed than the outer set.
More like not turning. (notice the dude on the tarmack?)
Don't know the exact engine start sequence, but I suspect it is in the process of starting up all its engines one (or a pair) at the time. If so, that suggests it is a normal event.Yeah...when does this usually happen? (inner set of props not active but outer set turning)
More like not turning. (notice the dude on the tarmack?)
Yeah...when does this usually happen? (inner set of props not active but outer set turning)
I suppose it's also possible/likely that this bird is just taxiing so doesn't need to have all 4 engines on as 2 will provide enough power to taxi the plane on the ground. I've seen C-130s do the same with 3 engines on.Don't know the exact engine start sequence, but I suspect it is in the process of starting up all its engines one (or a pair) at the time. If so, that suggests it is a normal event.
See also this AN-22 footage (same engines) eg
Crossed my mind too but there's a dude on the tarmac in front of the plane plus some small vehicle (may be some sort of geneator to assist engine start, or a tow vehicle.) so I don't think it is rolling.I suppose it's also possible/likely that this bird is just taxiing so doesn't need to have all 4 engines on as 2 will provide enough power to taxi the plane on the ground. I've seen C-130s do the same with 3 engines on.