On 11/07/2020 10:17, newshound wrote:
.... snipped
until an ingenious scientist added, basically, a washer to the fuel
supply: Tilly Shilling's orifice.

https://en.wikipedia.org/wiki/Miss_Shilling%27s_orifice

Fascinating! I spent many years teaching aerobatics and always assumed
that engine run-down when inverted behind a non-injected engine was due
to a weak cut, but from this
https://oppositelock.kinja.com/miss-...ice-1760623326 it
looks like the problem Miss Shilling solved was a rich cut - am I
misunderstanding the diagram?