Summary of Contents for Oliver Flugmodellbau FRESH
- Page 1 FRESH Sail flight model for F3-RES Span: 2000 mm Wing area: 35,6 dm² Weight RES: from 435 gr. Weight E-RES: from 465 gr. Airfoil: AG36 AG37 Web: www.oliver-flugmodellbau.de Email: hallo@oliver-flugmodellbau.de...
- Page 2 Construction manual (2016 August 28 , Oliver Matzen) Notes before construction work Because of the simple construction, it is possible to produce the model very quickly. Only little grinding work is required. To build the model you need usual model construction tools: ●...
- Page 3 ● For beginners, it is necessary that an experienced person helps. ● For damages and accidents that will arise in connection with the construction and operating of the model, "Oliver Flugmodellbau" do not take any resposibility..and here we go with building fun!
- Page 4 Construction of vertical stabilizer (rudder) Separate components with a sharp balsa knife from balsa and connection webs remove from the components (little grinding). Stuck together and stick together. Use superglue in order to save weight. Leading edge and tip grind around. Tail edge grind tapered. Planing in the hinge region with the balsa plane at 45 degree.
- Page 5 Vertically align the tail edge of the rudder to the tail boom. Stick the "Fresh" rudder with superglue into the tail boom. Superglue activator ist helpful in this case.
- Page 6 The layer of plywood which is glued to the elevator support is first screwed with two M3 metal screws (not included in the kit) and the plastic nuts to the elevator. Use M(etric) 3mm*20mm metal screws, which can be easily unscrewed after gluing.
- Page 7 The elevator-support is fixed with 25gr/m² glass fabric strips in addition to the tail boom. Grind the tail boom in the area of the glass fabric with 400 grain sandpaper and remove the sanding dust. To glue the glass fabric use thin superglue. First fix the glass fabric near the top of the balsa support with superglue.
- Page 8 For the electric glider version 4*4mm triangular strips (approx 4-5 cm long each) are glued to the stringers. After the formers and other internals are dried, glue the 4*4mm Balsa stringers with wood glue into the fuselage. In the area of the wing leading edge the stringers are overlapping. Grind the top stringer to fit the airfoil shape.
- Page 9 Glue the hook board with wood glue between the lower fuselage stringers. Glue balsa sides of the fuselage with wood glue on the plywood sides The upper and lower fuselage planking is made of 2mm balsa. Cut 3cm wide strips from the 2mm balsa sheet.
- Page 10 For the cockpit cover the 2mm Balsa planking is cut out wider as the fuselage (approx 4cm). Glue the plywood reinforcement in the center of the plating. Stick the carbon flat profile only on the first 3 cm into the slot and strengthen the glue area additionally with a little glass cloth.
- Page 11 To close the cover, the spring is first pushed under the fuselage planking and the lid by lifting simultaneously slid over the planking. The cover is pushed back until the front tongue can be slid under the fuselage planking. As long as the lid is not ironed, the edges of the cover are to be treated carefully. After ironing the edges are sufficiently strong to pull the lid to open up.
- Page 12 Insert the tail boom into the fuselage and align the elevator parallel with the center wing section witch is screwed on the fuselage. Place the jigs Z2 under the Tail boom and check the right attitude for forward fuselage. Tail boom and balsa cone pieces stick together with super glue each by each. After gluing treat the balsa conical with rasp and sandpaper.
- Page 13 Construction of the wing center section Center rib is made of two balsa and two plywood ribs. The balsa/plywood hybrid ribs stick together with superglue. Production tolerance of the carbon tubes is +/- 0,2mm. Therefore it is possible, that the holes in ribs has to be edit by grinding to make them fit to the tubes.
- Page 14 Grind the spar slightly with sandpaper 400 grain carefully and clean the spar before pushing the ribs on the tube. The center rib has to be right angular to the spar. Push all ribs on the tube spar and adjust with the slots in the tail edge and the jigs.
- Page 15 Use the dihadral jig for gluing the end ribs. Hybrid rib and Plywood rib glue together. Glue the ribs carefully to the Spars. Do not try to save glue when gluing ribs to the spars. Install 4x4mm balsa strips for the spoiler frame.
- Page 16 Install 1mm planking on the lower side with wood glue. The wood grain of the planking is transverse to the direction of flight. Install the balsa pieces on top of the wing screwing reinforcements. Grind the balsa pieces to the airfoil shape.
- Page 17 Install the two little balsa pieces for the spoiler magnets. The spoiler support F19 adjust to the frame. Ironing the Cover film on the supports before gluing the supports into the wing. 3mm magnets glue with super glue. 3mm magnets glue into the spoiler.
- Page 18 Construction of inner sektion and outer sektion of the outer wing The inner sektion of the outer wing has to be build in normal position. The outer sektion of the outer wing has to be build upside down ! Stick the hybrid ribs with plywood and balsa wood with superglue together.
- Page 19 Detail photo of the transitition of the 8mm spar into the 12mm tube spar. After all ribs are aligned neatly, the wings with some weight rests on the building board, glued with superglue spar and leading edge with the ribs. Glue the end ribs according to the dihadral jigs.
- Page 20 When dried turn the outer wing around in normal position and use the dihadral jig to glue the end ribs. The wingtip is made of three formed balsa pieces. Grind the tip with sandpaper. The dihadral giving FRP piece in the outer wing is glued with enough 5 minute epoxy into the tube spars.
- Page 21 Aluminium tube in holder fixture. Glue the parts with some superglue together. Side view of two fixtures. The 5mm diameter carbon rod is inserted. First insert the fixture without glue to test it. Possibly the wooden rings grind slightly until it fits. Before gluing the fixture into the tube spar seal the inside aluminium tube with...
- Page 22 The spacers with "excess length" are installed in the wing center section and aligned with the template Z7. The supernatant is grind away after drying with the rib. Then the framework is installed without the "excess length" in the outer wing and aligned using the 5mm Carbon rod.
- Page 23 Notes for the finish and the RC installation Ironing spoiler pad F19 before sticking the pad into the wing. As cover film Oralight is proved to achieve a low take-off weight. For stronger stress use Oracover. Installation proposal for the spoiler servo.
- Page 24 Torsion spring of rudder. 0,6mm steel is two times 90° bent and stab into the rib and foreward part of the rudder twistend counterclockwiese to the rope tension. Rope with crimp connected to the Servo horn. The rope plastic tubes be laid from the servo department to about 1cm into the tail boom.
- Page 25 Before drilling the hook into the hook board use a needle to make a marking from inside to outside and than drill with 1,5mm before screwing the hook into the hook board. Picture shows prototype of Fresh I wish you many good thermal flights...