Saunders-Roe Princess,you can see the massive 16ft 6 in diameter props they had.The inner four nascells had two turboprop engines each driving one prop,counter rotating to its partner.the outers had one engine & one prop.

the double engines were Bristol Proteus 610s,the singles Proteus 600s, @ 2050hp each engine X10 20500hp was pretty powerful.

Done