George W. Pyper

Professor Sturgess invents a miraculous engine which can draw unlimited power from the atoms of the air. When the professor is killed, his daughter and her fiance must fight to keep the secret of the power engine out of the hands of evil Weston Dore and his henchmen.

Yak arrives at the Gilmore ranch where rustling has occurred. Gilmore blames a wild horse when it is actually his foreman Mays. After Yak catches and tames the wild horse, Mays gets Yak out of the way by having him arrested for murder. Mays and his men can now make one last raid. (imdb)

William Gordon, Jr. is the rebellious heir to a million dollar airplane business. He leaves home in search of adventure, and falls in love with Helen, the daughter of an eccentric, destitute inventor. William enters an air race using a souped-up plane.

Riding at ease in the lazy afternoon sunshine a single troop of cavalry was threading its way in long column of twos through the bold and beautiful foothills of the Big Horn. Behind them, glinting in the slanting rays, Cloud Peak, snow clad still although it was late in May, towered above the pine-crested summits of the range.