Awwww...you've ruined the thread now Savoia....talking about plank wings! Now the Whirlwind in the picture was converted from an ex RN Mk 3 bought at a bargain price no doubt and pioneered the Bristow SAR ops,based at Manston.
I know I visited the Flight and have the pictures to prove it but not the time or expertise to locate them and put them online I'm afraid.