OKA-11 Baka Bomb
Simple plywood mount allows just about any brand of motor (above left) to be installed. Hook and loop material (above right) is not only used for the
Sheet foam, some thin plywood, and a hot wire cut foam wing are what’s needed for this airframe. At a 32-inch wing span, 29- inch length, and about 300 square inches wing area, a 150-watt power system makes for an easy flying, very lively model. I’m us- ing a prop in the nose rather than rocket power, a common modeling setup. Any 5mm or ¼-inch sheet foam can be used for the construction. I like to work with BP Hobbies
www.bphobbies.com construc- tion foam. If you don’t know anyone local who will cut the foam wing cores for you, I’d
attachment of the ESC, but also works well for keeping the motor wires snug to the fuselage side.
suggest The Core House http://home.earth
link.net/~philcartier or Robin’s View Pro- ductions as good foam core cutting sources. I cut the sheet foam parts out with a metal straightedge and a sharp scalpel-type mod- eling knife. The 1⁄32-inch plywood nose section dou- blers add a lot of strength to the sheet foam structure, and a carbon fiber tube or a piece of ¼ · ½-inch basswood will stiffen up the rear section of the fuselage. I build primarily with 5-minute epoxy, it sticks to most of the sheet foams, but the types with thin plastic
covering on both sides need a bunch of holes poked through the covering where the epoxy will be going. Foam compatible CA certainly can be used, and will save weight. The wing spars are 1⁄8 · 3⁄8-inch basswood strips, from a hobby shop or arts and crafts store, and are epoxied into the foam wing panels. The wing tips are sanded to a rea- sonably well rounded shape, and light- weight vinyl spackling putty works well to fill in gouges and rough spots.
The two wing panels butt up against the fuselage sides, with a 1⁄8-inch plywood joiner
Full-size plans available through Carstens Bookstore
www.carstensbookstore.com 44
Order Plan CD454 for $11.00 MARCH 2013
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