Hi Andy
My Parkers Owners Manual states that the I is 32'0", and the J is 10'6"
[I = Forestay fitting on mast to deck sheerline]#8232;
[J = Forestay tack to mast foot, extended to deck sheerline]
and in the list of sails then offered [1989] gives the area as 605 sq ft, whether Radial Head cut or Tri-radial Head cut, quoting the MXSL also as 32'0", and the SMW [sail max width] as 18'11".
Just Google Spinnaker SMW & SMXL for loads of techie explanations...
Geoff Sheddick
Parker 27/146 "Stroller'
Geoff Sheddick
Parker 27/146 "Stroller'