55" wingspan aerobatic sport trainer designed by Dave Patrick back circa1980's I would think, for .20-.30.cu.in motors and 4 channels and i have seen an article on successful electric conversion.  The box is crammed full of pre-cut, die-cut and shaped balsa and ply parts, with great instructions booklets and the usual very accurate and presented plans [yellowing a little due to time], accessories, cowl, wheel pants, spinner, horns, screws, wheels, decals, etc and makes up into one of the best looking trainers for those with some basic flying under their belts, as this can be quite aerobatic.  This kit is now quite rare indeed and is of the usual Goldberg quality.