Have a couple but they are church types..Holey and flat;)

Lovely work mate..

Rotec a no go?
http://www.rotecradialengines.com/

Do you mean the hole diameter which accepts the back plate spigot , just inside the PCD of the 16 bolt holes ?

12 x6mm bolt holes?I have only the drawings on the pup.Maybe I,m thinking of the LeRhone and Clerget…
LOL and I thought the Roundel Police were tough 🙂

Er….yea. looking at this from a laymans point of view (best qualification I have is a PPL….fixed undercarriage), did Mr Supermarine ever come up with an undercarriage release system which was not an ‘accident waiting to happen’ ? How many pilots / aircraft were lost during the war due to the release mechanism locking up. ?

Cheers

Probably not as many as 109,s Groundlooping:diablo:

Beneath all the bracken , the motor mounting plate looks like it might have 16 bolt holes for mounting of the Motor back plate to it…This if I remember corresponds , quite naturally , to either the Clerget or Bentley.Though I stand ready to be corrected .

There is a difference in the centre shaft hole Diameter between Clerget and Bentley..

Which ones have buried Spits?