Doodle Bug Fi-103 (oz16565)
About this Plan
Doodle Bug Fi-103. Control line semi-scale model for 1.5 cc engine. Tractor prop layout. Wingspan 19 in.
Quote: "A semi-scale control-line model for 1.5cc engines, a piloted version of the dreaded 'flying bomb' of WWII. Doodle-Bug Fi 103, by Jym and Dave Leddy.
The Doodlebug first appeared in the Guildford Model Flying Group in the early 70s as a novelty model for the control-line displays we used to give. The most impressive being a Merco 35 powered, 4ft span monster. They have recently been revived as something unusual, to encourage young control-line enthusiasts. The construction is straightforward and results in a strong flyable trainer that is certainly different.
Wing: This is made from one sheet of 1/16 x 4 in balsa, cut in half. The bottom is laid on the plan. Leading edge, trailing edge, ply plate and ribs are then glued on. At this point drill the bellcrank mounting hole right through the plate and the bottom sheet. Trim and fit the top sheeting and add wing tips. When dry remove from the board and drill the bell-crank mounting hole from the bottom, through the top sheet and enlarge the hole in the top sheet to take a 6BA bolt and washer. The wing, after sanding is now ready.
Fuselage: This is based on a hard 1/bin. sheet crutch with the bearers glued in whilst flat on the plan. Formers Fla, F2a-F7a are glued to this 1/8 sheet spine. When thoroughly dry, remove from plan and glue the other halves of the formers to the opposite side of the 'spine.' Install a commercial wedge tank. The wing and tailplane can now be glued in position, squared up, and left to dry.
When the glue has thoroughly set, install the bellcrank, control wires, pushrod and elevator horn. The fuselage around the tail-plane can now be blocked in and carved approximately to shape. Covering the fuselage can be done in one of two ways..."
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(oz16565)
Doodle Bug Fi-103
from Aeromodeller
July 1984
19in span
Scale IC C/L Military
clean :)
all formers complete :)
got article :) -
Submitted: 03/02/2026
Filesize: 239KB
Format: • PDFbitmap
Credit*: ilgk48
Downloads: 273
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- Doodle Bug Fi-103 (oz16565)
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