.........as probably nothing to do with the amount of fuel on-board,
Quite, surprised if fuel
quantity was an issue, I have had similar unhappy noises when a magneto decided to act funny, and also more recently, ran beautifully until full power was reached on take-off, which almost coincided with lift-off in the microlight, then all hell broke loose, sounded more like a bit of fuselage, maybe undercarriage, breaking up, banging and rattling something awful - had barely enough flying speed, so didn't touch ANYTHING, left gear and flaps as is and crept around the circuit at about 300' , but as I reduced power for landing it all came good again. No problem found, but then we didn't do a full power run, initially; finally did and discovered that full flow was blocked only when full power was demanded.
Mr. Murphy is always with us.