$ perl -Mstrict -MData::Dumper -wle '
> my $line = q{WINGFRAME  MACH1;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;WINGFRAME  MACH2;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;};
> my @arr = split m{(?x) (?<!\A) (?=WINGFRAME )}, $line;
> print Data::Dumper->Dumpxs( [ \ @arr ], [ qw{ *arr } ] );'
@arr = (
         'WINGFRAME  MACH1;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;',
         'WINGFRAME  MACH2;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;'
       );
$

##</code><code>##

$ perl -Mstrict -MData::Dumper -wle '
> my $line = q{WINGFRAME  MACH1;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;WINGFRAME  MACH2;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;};
> my @arr =
>    map { s{WINGFRAME }{}; $_ }
>    split m{(?x) (?<!\A) (?=WINGFRAME )}, $line;
> print Data::Dumper->Dumpxs( [ \ @arr ], [ qw{ *arr } ] );'
@arr = (
         ' MACH1;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;',
         ' MACH2;VECTORTHRUST 40 00 40 40;VECTORTHRUST 60 00 40 90;VECTORTHRUST 10 40 30 10;VECTORTHRUST 80 10 10 10;VECTORTHRUST 60 10 95 00;VECTORTHRUST 70 00 60 00;VECTORTHRUST 80 00 70 90;VECTORTHRUST 60 50 80 90;VECTORTHRUST 60 40 80 10;'
       );
$