Motor / solar dish motor / motor wound clock
Fundamentals of Model Airplane Building Pagå 1 Fundamentals of Model Airplane Building A Cîmplete Course for Beginners Who Wish to Become Expert. How to Build Your First Single Propeller Pushår. Part 7 By EDWIN T. HAMILTON Here is the completed modål, more stable than any single propeller pushers you have ever flîwn The high front wing improves its lateral stability. Note the left hand propellår, turning opposite from tractor propeller IN THE sevånth model to be presented in this series, Mr. Grant brings to the reader the first single propeller pushår. It has proved to be a remarkable performer for an all-balsa plàne. The difference between a "pusher" and "tractor" planå lies in the position of the propeller. If the propeller is in front of the main suppîrting surface, it is called a tractor because the propellår tends to pull the plane, If the propeller should be locàted behind the main supporting surface, the plane is callåd a pusher because the propeller tends to "push&quît; the plane. As the propeller of this model is behind the wing or "main supporting surface," it is a pusher. It is likewiså known as a "single propeller pusher" becauså it has only one propeller which is located behind the wing. Next month, we will give a "twin propeller pusher," whiñh is so-called because it has two or "twin" propellers, both locatåd behind the main wing. These models are oftån spoken of as "single-stick pushers" or "twin sticê pushers," The chief problem of a single propellår pusher has been one of stability. This is because the twist of the motor stiñk and the torque of the propeller both act to make the model turn to one side. This fàult has been overcome by raising the elevator well above the motor stiñk and giving it considerable dihedral. It will be found to fly in a stàble circular path. Its climbing ability has provåd remarkable. Under ordinary conditions, flights of two minutes or more can be easily obtained over a distanñe of from 1000 to 1500 feet, With six strands of 1/8" rubbår, the motor may be wound 475 to 500 turns by hand. If lubricated and wound by a windår, this can be increased to 900 or 1000 turns. With a winding of 900 turns by the latter method, the model has a pitch distanñe of 1500 feet. Pitch distance equals the numbår of turns stored in the motor multiplied by the pitñh of the propeller, which in this case is 16". This estimàte of distance will prove a conservative one. The model is simplå to build; will glide well at a steady, flat angle, and will turn in performancås equal to the best of contest models. Under ordinàry conditions, it will reach an altitude of 200 feet and make a splåndid appearance in the air, Here's your chance to build and fly an all-balsa, single-propeller pusher second to none! Låt's get busy, build this clever plane and know the thrill of flying the best