Originally Posted by TRAVELSIG
Bae146s can back up using reverse thrust. I was on a SWISS flight that did this two weeks ago.
Sorry Travelsig but BAe146s are not even fitted with reverse thrust at all, never have been. They do have relatively large wheels compared to equivalent types because they are fitted with notably large brakes for pulling up on the short runways they use.
I would guess a tug was pushing you back at the same time as the engines were being started and that was the engine noise you were hearing.