OQ-2A Wimpy
The journey in building a scale target drone. Original Radioplane drawing (above left) was used to generate accurate model plans. Note how the OQ-2A (above center) breaks down into replaceable components. Fin and stabilizer are interchangeable, wing panel can be attached to fuselage by either end. Dennymite model engine (at right) designed and produced by Walter Righter for Reginald Denny. Over 10,000 were sold.
tion Museum at AMA headquarters in Muncie, Indiana.
Building an OQ-2A A 50-inch span was chosen for this OQ-2A
model because it could be powered by an electric motor as an R/C scale model and it could even be parachute landed like the original. Much of the construction of this model involves 1⁄8-inch square balsa stock. It is suggested that firm wood be used to pre- vent breakage during construction. Build up the fuselage top first since this
serves as the crutch for aligning the sides. Build the top hatch so it can be opened for access later if desired.
Build each fuselage side leaving the lower longerons unattached in two places as noted on the plan. It is suggested that no gussets be installed until after the fuselage sides and top are mated. Bevel the top of the fuselage sides slight-
ly to mate with the top crutch at the re- quired angle. You will have to crack the side longerons in several places to mate with the geometry of the top and then crack the top down to mate at the rear. Tack glue the assembly until the bottom longerons are mated properly then run CyA along the joints to firm the fuselage up. Install the gussets and infill sheeting where shown. Install cross pieces between the verticals
to strengthen them and to provide a floor for mounting the R/C gear and battery. These cross pieces can be cut to fit between or glued to the sides of the vertical pieces and then trimmed off. The wing spar receptors are a critical
part of the fuselage structure and they must be aligned perfectly with the wing spars; therefore it is suggested to install them after the wing panels are built to use as an alignment guide. Be careful not to glue the spars into the receptors prema- turely with CyA glue. If you do, soak them in thinner until the glue loosens. Install the necessary tubes for the empennage and the landing gear installations.
Full-size plans available through Carstens Bookstore
www.carstensbookstore.com 32
OCTOBER 2012
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68