On 11/07/2020 10:17, newshound wrote:
Merlin engines could stall in certain movements until an ingenious
scientist added, basically, a washer to the fuel supply: Tilly
Shilling's orifice.


I read this was overcome in the variants used in the mustang by a
pressurised carburettor. the better machining tolerances on the packard
built engines also contributed to better longevity and faster assembly.