Google "fairey swordfish inertia starter" and have a look at the extract that comes up in the first listing
From the Flight Deck: An Anthology of the Best Writing on Carrier
A good description of the inertia starting process, leading into the Taranto raid.
I remember reading in another book about a crew becoming exhausted trying to start the Swordfish of a new pilot. Eventually, the Petty Officer climbs up to the cockpit, looks around and then pointedly switches the mags on!