Plan file details
Stampe Monitor. Control line stunt model. Merco 35 shown.
Quote: "56 inch span semi-scale control-line stunt model of Leon Biancotto's aerobatic plane. Stampe-Renard Monitor, by FL Warburton
FRANK WARBURTON chose the Monitor as a suitable semi-scale subject for stunt for two reasons, (a) it can easily be adapted to the correct layout for stunt, (b) the real aircraft is fully aerobatic.
With an effective wing area of approx. 610 sq ins and a weight of only 47 oz (including 5 oz for cockpit detail!) a Fox 40, Glow Chief 45, or Merco 35 provide ample power. The combination of nose length and tail moment, coupled with light loading gives a very tight turning radius without the resulting kick that is so common with some designs.
In order to achieve a weight of 47 oz and yet still have a good finish the wood must be carefully selected. For such parts as wing ribs, leading edge sheet, tailplane and all blocks, use the softest wood available.
Begin the wing by cutting 1/8 Obechi templates for W1 and W12. Sandwich eleven 1/16 blanks and one 1/8 blank between them, bolt together, cut to correct length and carve and sand to section. Notch the ribs for leading and trailing edges, mark on spar positions and cut them after parting the ribs. Finally, cut holes for the leadouts. Select a medium straight grained sheet of 1/8 balsa and cut spars for the port wing. Mark rib positions on the spars, slide ribs in place and spot cement. Add leading edge and then repeat the process for starboard wing but throw away W12 after sanding. Cement wing halves together with braces, and sighting along trailing edge check for alignment. Splice trailing edge pieces and cement in place. Finally add trailing edge cap (very hard 1/4 sq). Glue and pack bellcrank platform and control assembly (complete with leadouts and pushrods) in place. Attach 1/4 in flaps with non-stretch muslin hinges, and connect the pushrod.
Bend undercarriage from 10 swg wire and fix to if ply with 'J' bolts then cement to spars. Glue leading edge sheet in place with PVA, and cement 1/16 cap strips to all ribs. Carve tips from soft block, hollow out, and pack 1 oz of lead in starboard tip. Solder the elevator pushrod to the flap horn.
Start off the fuselage by drilling bearers and pre-cement them to F1 and F2 after cementing tank to bearers, and tank platform between F1 and F2. Cut sides from x sheet, add 1 mm ply doublers, then before the cement dries, glue to engine bearer assembly and hold with elastic bands till dry. Pack around bearers with 1/2 in sheet to cut down vibration. Cement in formers F3 and F5 and then join fuselage to wing and check for zero incidence. Reinforce the joint with silk. Bring fuselage sides together with F14 and hold with elastic bands, then add formers F6 and F13.
Carve tailplane from 1/2 in sheet and add 1/16 ribs. Connect pushrod to tailplane and slide up and down fuselage till neutral flap/elevator position is reached, then cement in place, reinforce the joint, and cement..."
Stampe Monitor, Aeromodeller, June 1962.
Direct submission to Outerzone.