XF-1000. Control line sport model for Cub .099 engine.
Quote: "XF-1000 Flying Wing. Cuba's top model designer, Senor Alexis Poyato of Guantanamo must have heard us bemoaning the lack of .09 sport-type flying wing planes. Most all that come our way are strictly for cutting somebody else's ribbons and usually don't look too snappy. So we give you AP's wing-of-the future, the XP-1000. Construction data is on Hobby Helpers full size plan #557 (a three sheet, 6-sided deal that's a corker). Let us know how she performs for you. Reports from down Cuba way have the local modelers applauding the nice appearance, good stability and graceful take-offs and landings."
Quote: "Like to build a pert little control-liner with scale-like appearance? Then gather up the balsa and cement and tackle this little nifty. Though slab-sided this 'X' fighter has pleasing lines and is a good performer. Power is an .099 Cub engine swinging a 7 x 3 propeller, all up weight is 8 oz and span is 20-1/2 inches.
The model features unit construction so all parts should be cut out in the beginning for easy assembly as the work progresses. Begin with the fuselage. Cut out the 3/32 sheet sides from 2 in wide stock. Cut slots in fuselage sides for spars and trailing edge. Cement hardwood engine bearers to top edges of sides and let dry. Position of bearers may have to be relocated to suit your particular engine. Next cut out the fuselage formers of 1/8 plywood and 1/8 sheet. Bend landing gear wires to shape and fasten to F1 and F3. Stitch wire to plywood with heavy thread or soft wire. Cover liberally with cement.
Now join fuselage sides and formers. Install fuel tank and drill F-1 and engine bearers for vent and fuel tubes. Cement piece of 1/4 x 3/8 hardwood across rear bottom of F-1. This forms pad for cowl attachment screws. Now install bellcrank mount of hardwood. Add scrap 1/8 sheet reinforcing blocks around ends of hardwood on fuselage sides. Drill bellcrank mount for pivot screw and install bellcrank and pushrod. Leave rear end of pushrod long so it can be bent to fit horn later.
Wing spars are added next. Cut spars to shape and notch halfway through. Slide spars through fuselage slots and cement well. Line up carefully so there will be no twists in wing. Next add wing ribs, trailing edge and leading edge. Cut away former F-4 to permit trailing edge to fit into slot in fuselage. Cement tip blocks in place and carve to rounded shape. Drill left leading edge and tip for line guide tubing. Install leadout wires now. Hook to bellcrank and pass through tubing guides. Cement solder weight to inside of right wing to counterbalance leadout wires.
Cut out elevator of 3/32 sheet, round off front edge and taper trailing =age. Cement and bolt elevator horn in place and then join elevator to wing trailing edge with fabric hinges. Bend pushrod end to fit horn and retain with glob of solder or small washer soldered to end. Check control system for good free movement and relieve any binding or sticking.
Fuselage can be closed up now. Cement bottom of 3/32 sheet in place. Cut slot in 1/4 sheet for fin and cement top in place. Round off edges of top with sandpaper. Cut out fin, dorsal fin and rudder and cement in place. Offset rudder slightly to right.
Sand entire structure smooth and cover wings with Silkspan. Give model about three coats of clear fuel-proof dope, sand lightly thell add at least three coats of colored fuel-proof dope. Now add few remaining details, dowel pitot tube, fuel line on landing gear wire and cockpit enclosure. If commercial canopy is obtainable it can be used or one built up as shown on plan. Small plastic pilot's head can also be put inside canopy.
The engine cowling should be cut out and bent to shape. Bend 1/4 radius along dotted lines to match curve of fuselage top. Attach cowl with small wood screws through tabs at bottom and through sides into engine bearers.
Add decal insignias and numerals as desired. Follow detail shown in photo. Be sure model balances in the range shown, rearward balance will permit some stunting while forward balance will make a good solid flyer that will stay out on the end of the flying wires."
This is an Uncle Willies plan.
Direct submission to Outerzone.
Update 09/01/2019: Added Hobby Helpers plans advert pages, thanks to theshadow. This identifies the designer and also gives us a photo of the model, now.
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