These are MAN plans from Feb 1965.. Featuring Dr Ralph Brooke's Pattern Plane the Crusader and Claire Sieverling's Mustang Stunter ... The plans are in new condition .. Last pic is Claire Sieverling and Bob Gialdini at the VSC afew yrs ago...


The Crusader is a 60 (Fox .59) powered plane with a 68" ws.. there is a lot of info out there on this famous design..

Read more here . https://outerzone.co.uk/plan_details.asp?ID=8833

The Mustang has a 56" ws  and was powered by a Johnson 35... it appears that all of Sieverling's models weighed in the 50 oz range .. I built his Sun Devil and i came out at 48 ozs with polyspan ...I powered it with an LA 46 at first but didn't like the run so install a Silver Fox 40 and that worked well .. Read more here https://outerzone.co.uk/plan_details.asp?ID=3119

Will combine shipping