New SebArt aerobats include a big, 76-inch-span Sukhoi 29 (designed for a Hacker A60 motor); Sebach 342 (deisgned for a Hacker X-55 motor); Angel S 30E (designed for a Hacker 30 motor), Sukhoi […]
Quique Somenzini shares details about the E-flite Carbon-Z Yak 54 that he designed. It combines a revolutionary Carbon-Z™ airframe with a custom 25-size brushless power system. What you get is an unlimited 3D rocket with a breathtaking thrust-to-weight ratio of 2:1. Knife edge loops, hovering torque rolls at half throttle, ballistic uplines to the […]
By Dave Gierke Occasionally, you may want to change the component percentage of an existing fuel, such as increasing its castor oil content. This would be advantageous for the break-in and normal operation of certain engine types (e.g., ringless iron/steel pistons/cylinders; plain-bearing crankshaft support). What are the requirements? You must know the existing oil percentage, […]