This is a 920mm span sleek and sporty V-tail model designed by John Rutter for 4-function R/C using ‘ruddervators’ and constructed from the detailed plan sheets traditional using all wood methods, and suits any 0.15 cu.in. 2-stroke engine and 4-function R/C.WING AREA: 240 sq. in.WING LOADING: 13 oz. /sq. ft.