Frame 10

Frame 10 is another major frame as it holds the attachment brackets for the rear wing spar brackets.It consists of a double frame of U shape and sits under the pilots seat.Material is aluminium of 1.2mm thick.The buttstrap used to connect the webs is the same as Frame8,s although rivet size has grown from 1/8th" to 5/32nd".

Also where the bottom cutouts are for the longeron there are stiffening doublers that differed from early to late Mk Spitfires.Internally is the same spacer arrangment as F8 although at the bottom corners there are U Brackets to help distribute the loads of the wing spar brackets.At the top corners of the port side are holes for fairleads to take the rudder and elevator trim cables.