" Production Wyverns were powered by a turboprop engine driving large and distinctive contra-rotating propellers...."
And alarmingly....
"All Wyverns were withdrawn from service by 1958: while in service and testing there were 68 accidents, 39 were lost and there were 13 fatalities; including two RAF pilots and one USN pilot"
Looks like they only built about 120 odd..... :-?
39/120 isn't a great stat, but isn't the worst either - bearing in mind that figure includes write-offs/reduction to spares as well as those lost in crashes (over a 12 year period from first flight to retirement). The turbo contra prop was pretty special - we loved it so much we did it again with the Gannet, except the Gannet was powered by two engines stuck together.
As for the withdrawal in 1958 - that was about the time that the Fleet Air Arm was beginning to become an (almost) entirely jet front line force (we used to have proper aircraft carriers in those days with cats and traps, before we went all VTOL/STOVL), with the introduction of the Supermarine Scimitar, DH Sea Vixen, and then the Buccaneer in the early 60s. Sadly none of the production models exist, as they were of the age, and not particularly notable, that they ended up on fire dumps in the 60s and 70s and were burned into extinction.
PS - it's
Westland not Western (as in Agusta Westland - successful bidders in the US presidential helicopter competition... ...until someone mentioned that it would have parts made by Brits and Italians, and we're obviously all terrorists!

They changed their mind after that!)
PPS - love the shot down in the weeds
