Heli-Topper produced by Heli-Dunn is a feature of Heli-Saw to top trees on the go. Actuated in 6 seconds the lower two blades angle up to 60 degrees to topping trees. Tree topping is useful when trimming along power lines in right of ways, and more recently noble tree bow production. Tree bow production for Christmas wreaths require trees to be limited to about 20 feet in height. In addition, the side trimming feature of Heli-Saw with side guard trims bows off nobles at a rate of 40 to 60 sides of trees per minute. For power line tree topping there are occasion where deciduous trees are top heavy during early summer months when winds can snap off limbs into powerline right-of-ways. The feature of tree topping on the go as well as side trimming is exclusive to Heli-Dunn and Heli-Saw. Patent pending.