Taylorcraft (oz2508)


Taylorcraft (oz2508) by CO Wright 1955 - plan thumbnail

About this Plan

Taylorcraft (T-Craft). Free flight scale gas model. Scale is 1/8. Atwood .049 power, weight 14oz. MAN October 1955, CO Wright The T-Craft.

Update 10/7/2023: Replaced this plan with a clearer copy, thanks to theshadow.

Direct submission to Outerzone.

Update 10/7/2023: Added article, thanks to theshadow.

Quote: "Flying scale models should be bigger, states this builder. The performance of his Taylorcraft on Half-A to .075 engines certainly backs him up.

When flying scale was limited to .05 engines, the models of small private ships were commonly scaled 1 in, to the foot. Results were generally not too successful with small spans and heavily loaded wings on Cubs, Cessnas and similar ships. The inch scale jobs proved tricky at best and difficult to adjust and fly. Nose-overs, stalls, loops and spins were common. This prompted the building of the Taylorcraft described on a scale of 11/2 in. to the foot.

The early Taylorcraft of 1941 was selected because of its balanced design and simplicity. Span is 36 ft, which, at 1-1/2 in scale figures 54 in. Scale elevator span would be 15 in, but was enlarged 4 in for stability. Accordingly, the 1° dihedral of the ship was increased to measure 3 in at the top surface of the wing tips.

The experimentally minded might build a smaller elevator, approaching scale, and monkey with the dihedral, pulling it down an inch or so. This would raise the scale points if it could be done. However, a bird with plumage or a bird for flight is the choice forced on the scale builder. I take the flight.

Flying results of the 1-1/2 in to 1 foot T-Craft exceeded expectations. With an .049 Atwood, weight of 14 oz and 54 in wing, it flew off the board and required only some wing incidence. It has inherent stability and realistic flight characteristics. Entered in the Nationals at Chicago in 154, it placed fifth. At Dallas that year at the Labor Day meet, it placed first. At the Texas meet, the T-Craft rose ROG from a rather rough dirt runaway in a 25 to 30 mile gusty wind. Take-off is straight and leisurely with climb and circle to the left.

With larger power permissible now in scale, the ship may be tried with an .07 motor. This would permit larger prop, approaching scale, and cut the blanking-out effect of the large nose.

Special Arrangement on Tail: New, as far as I know, on scale jobs, is the arrangement for the removable elevator and rudder. These are aligned in simple slots and notches which make incident adjustments possible on the elevator. An inconspicuous 1 inch rubber band is all that is needed to hold the two units on the fuselage. The slots and notches must be in perfect alinement but this is not too difficult with use of 1/16 plywood mount as indicated, and careful, un-hurried work. The elevator is placed below the mount.

The larger the ship, the more convenient it is to disassemble the units for transportation. However, the chief reason for the detachable elevator and rudder is to permit their storage on a 'press board' to prevent warping. This board may preferably be made by cementing 1/2 x 2 balsa stock to form a board. Outlines of 1/8 balsa square are cemented to fence the units on the board - the elevator on one side, the rudder on the other - and strong corrugated paper boards (from a grocery box) are hinged for covers. Rubber bands bind the sandwich together for safe storage and transportation. This idea for the tail arrangement may well be copied for other scale jobs.

It will be noted also that the wing has an unconventional attachment. The 1/16 steel wire hooks as shown permit connecting with rubber bands through the one door on the ship, The hook at the bottom is anchored to the cabin plywood floor which also carries the landing gear. The hooks must be securely installed and cemented in place. 1/8 sheet balsa triangular blocks cemented under the center of the wing aline the unit at the cabin corners, all out of sight. The one door on the right must be placed to permit full opening and closing with the wing in position.

Use Light Balsa: Soft balsa should be used in most ribs and sheeting. Soft, thick sheeting is preferable to the thin, hard kind and it will sand more easily to form. Spars, leading and trailing edges should be medium to soft. Use hard 1/8 square on longerons and hard stock on the 1/8 to 1/16 stringers. Cabin main framework that supports the wing may be 1/8 square bass or white pine, as may the spar on the elevator. Make the ship light, using very soft balsa where stress is easy. The 14 oz weight of the original may be cut an ounce or two with judicious selection of soft wood.

Construction is conventional. Build the fuse sides one on top of the other, lining the longerons with small blocks held to the board with pins. The fuse is formed with rectangular cross-section. Exact lengths of cross-pieces are shown. Nose of ship trust be constructed 'in the air.' Temporary stringers can be extended forward of cabin as scaffolding to locate formers, firewall, etc. Cowl can be of pie sections of 3/16 soft balsa or carved from soft blocks. Dowels align cowl on firewall.

The original was covered with yellow Skysail, 75 weight. Two coats of thin clear and one coat of Aerogloss, T-Craft yellow did well on the wing and tail. Fuselage had an extra color coat and cowl several more. Numerals and aileron markings. were cut-out black paper; a tapered black stripe, with diamond detached head, ran down the center of each side of the fuse.

Motor is mounted with moderate down and right thrust. The balance is placed exactly as shown on fuselage with wing and tail in place. Vents at cowl should be fairly large, say at bottom, sides and top, 3/16 x 1-1/2 in. Leads can be run outside on firewall for booster, using an old ignition cable clip at the glow plug. Put plugs in the tank to allow motor run of 40 seconds to cover starting and to allow 50 seconds in the air.

Try for left circle on power and glide using more or less right thrust if needed Raise front of the wing experimentally with 1/32 sheets of balsa until a slight galloping stall is apparent in glide and then remove a sheet or so to level the glide to its minimum sinking speed."

Supplementary file notes

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Taylorcraft (oz2508) by CO Wright 1955 - model pic


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