Construction Guide

GUIDELINES FOR CONSTRUCTION OF

ANTIQUE, OLD TIMER AND NOSTALGIA AIRCRAFT

5.4.2.1. GENERAL

PERMITTED

Where the original undercarriage moved in slots in the fuselage, a solid attachment may be made at that point, [e.g. Flying Quaker, Dallaire],

Undercarriage fairings, if shown on the original as standard fittings, must be fitted, [e.g. Miss Model Craftsman, Playboy],

Full or partial wheel spats may be removed to make the model practical for use on grass fields.

Scaling must be done from the ORIGINAL SIZE DRAWINGS.(some ½A plans have bulkheads moved for engines - these should not be scaled

The wing and tail may be covered with different materials, e.g. heat shrink for tail and tissue for wing.

5.4.2.2. TAILPLANE AND FIN

PERMITTED

Addition of necessary structure for R/C controls.

Bracing may be removed, e.g. Flying Quaker.

Alternative methods of attaching tail assembly to fuselage.

NOT PERMITTED

Added surface sheeting.

Added cut-outs in tailplane for rudder movement,

Added cut-outs in fin or rudder for elevator movement.

5.4.2.3. FUSELAGE

PERMITTED

To increase size of longerons.

Added surface "warren girder" bracing.

Added internal sheeting for engine area and undercarriage.

Cabanes may be strengthened with wire.

(e) Removable hatch(es) may be fitted for access to tank, R/C gear and/or battery.

(f) An unfaired spinner, up to five cm (two inches) in diameter may be fitted to facilitate the use of a starter.

NOT PERMITTED

(g) The addition of surface sheeting, if notshown,

(h) Reducing, increasing or eliminating cabanes.

(j) Painting windows on cabin models, unless shown on the original plan as dummy windows.

(k) Fitting a faired spinner if not shown on the original plan

5.4.2.4. WINGS

PERMITTED

(a) Increasing or reducing rib thickness.

(b) Adding shear webs to spars.

(d) Fitting a solid trailing edge instead of a built up trailing edge.

(e) Adding spars below the surface.

(f) Increasing the size of the original spars.

(g) Substituting hardwood for balsa and vice-versa,

(h) Wing struts, if shown, must be used.

(j) Wings may be built in demountable sections to facilitate transport.

NOT PERMITTED

(k) Adding turbulators.

(I) Adding surface spars.

(m) Adding leading edge sheeting

(n) Increasing the width of leading edge sheeting.

(o) Increasing the width of trailing edge sheeting.

(p) Changing dihedral angles.

(q) Using bolts to attach the wing unless shown on the original plan.

WHEELS

Wheel diameter must be the same size as shown on the the plan that was scaled from the original. If the original model had balloon wheels, the contestant may fit commercial wheels of the same diameter or may manufacture similar wheels. All non-original wheels must have a diameter to width ratio of about 4 to 1 and 6 to 1, e.g. a wheel 19 mm (3/4 inch) wide should be between 76 mm and 115 mm (3 and 41/2 inches) in diameter.

Note: Sliver wheels are not acceptable unless specified on the original plan.