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Wowings Duck

CONSTRUCTION MANUAL

Copyright 2006 Wowings

www.wowings.com

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Summary of Contents for Duck

Page 1: ... 1 Wowings Duck CONSTRUCTION MANUAL Copyright 2006 Wowings www wowings com ...

Page 2: ... is missing from the Duck kit and that none of the contents have been damaged If anything is missing or damaged please contact your place of purchase immediately to make arrangements for replacement parts to be supplied Your Duck kit should contain the following 2 x EPP foam wing halves 3 x lengths carbon ribbon spar two short and one long 2 x lengths of balsa marked with angled lines for fixed tr...

Page 3: ...dge of the EPP foam wing cores in the middle of the wing to make sure that their angled centre joint fits nicely together The BOTTOM surface of the balsa trailing edges is the one that had the cut out lines marked on them and the surface that meets its leading edge at a 90 degree angle When butted up against the foam sub trailing edge the bottom surface of the balsa trailing edge piece should form...

Page 4: ...e raised about 2mm or 3mm above a straight edge ruler held on the underside of the airfoil 11 The remaining two lengths of balsa trailing edge will now be used to form the two elevons Hold one of the pieces so that it is firmly up against the foam sub trailing edge with its angled end up against the outer end of the fixed trailing edge piece They should match up perfectly ie the cuts should be par...

Page 5: ...rwise you ll just need to be patient Alternatively you can use polyurethane PU glue for gluing the spars in Please seek advice if you have not used PU glue previously as it foams and expands while curing and can create a mess of your wing 19 The following steps now reference the TOP surface of the wing 20 Draw a line parallel to the leading edge front edge of the wing setback 35mm or 1 3 8 measure...

Page 6: ...surface of the wing towards the centre to allow radio leads to pass over 28 Once you re happy with the fit glue the spar in place as per the first one 29 The remaining small 24 carbon ribbon spar is used to reinforce the area either side of the gap between the fixed trailing edge and the elevons Draw two lines extending 305mm 12 down each wing half parallel to the foam sub trailing edges and setba...

Page 7: ...r all the way through the foam to the other side Remove this foam plug and draw a line vertically up its front side for later reference 37 Hold the side of your receiver against the side of the foam plug in the desired position eg flush with the top surface and trace the line s Repeat this for all four sides and then cut off a bottom slice along this outline and a top slice if you ve decided to ha...

Page 8: ...8 Cut a slit for the receiver antenna that loops around and then runs up about 25mm 1 in from the foam sub trailing edge of one of the wing halves 49 Fit the battery pack receiver and servos into their recesses Plug everything together and test that it is working correctly Make sure the servo arms are centered in the correct position when the transmitter in on and its trims are neutral The servo a...

Page 9: ...on covering be sure not to use too high a heat or it may deform melt the foam Also be careful not to introduce any warps or twists into the wing when shrinking the covering 3M Super 77 multi purpose spray adhesive is required regardless of the covering method used and is hereto referred to simply as spray adhesive 56 Thoroughly remove all dust from the glider and your work area 57 Use masking tape...

Page 10: ...ace of the wing that you just sprayed apply filament tape following the spar locations as per the bottom surface 65 Apply diagonal strips of filament tape to the wing as per the bottom surface 66 Locate the elevons you prepared earlier and spray their bottom surface with spray adhesive Also spray the bottom surface of the wing s foam sub trailing edge Let dry for 5 to 10 minutes 67 Cut a length of...

Page 11: ...g tip with spray adhesive Let dry for 5 to 10 minutes or until aggressively tacky 75 Lay a strip of filament tape along the centre chord of the wing overlapping the panel join line by about 12mm 1 2 Lay another strip towards the other side of the join line overlapping the first by about 25mm 1 so the overlap is centered over the panel join line Split and wrap around at the leading edge and cut off...

Page 12: ...til aggressively tacky Cover as per bottom surface 86 Using a straight edge ruler and sharp knife trim off the tape that is overhanging the trailing edge of the wing and elevons Leave about 3mm 1 8 back from the trailing edges so that the tape is sealed to each other sticky side to sticky side 87 Cut the elevons free and then wrap a piece of covering tape around each exposed end of the elevons and...

Page 13: ...tor to fix it to the pushrod Repeat for the second elevon 94 Trim off the excess length of the pushrods using a pair of side cutters pliers FIN ATTACHMENT 95 Locate the piece of coreflute supplied in the kit and cut out the two fins as marked 96 Slide a 25mm 1 wide 65mm 2 1 2 long piece of filament tape through the slot in one of the fins and secure it to a wingtip by wrapping around from the top ...

Page 14: ... in the Duck s construction adjusting the glider s centre of gravity CG also known as its balance point If the glider is not accurately balanced it will not fly well and may not even fly at all An incorrect centre of gravity is one of the most common causes of poor flight performance so take extra care here During balance adjustments your glider must have everything already installed in place read...

Page 15: ...the lead and the battery pack Cut from the bottom surface and stop short of going through to the top surface Secure the nose weight and reinforce the surrounding area by covering with a patch of filament tape 108 Re check the CG to make sure it s exactly 210mm 8 1 4 back from the nose or a little further forward closer to the nose if desired Adjust if necessary FINAL COVERING 109 Cover the nose we...

Page 16: ...ll stick movement Control throws should be adjusted accordingly to suit your personal control preferences ie the relationship of transmitter stick movement to control surface movement 117 The amount of control surface movement for the elevons can be adjusted electronically via some transmitters If your transmitter has end point adjustment EPA then adjust this setting until you achieve the desired ...

Page 17: ...he Duck should tend to pull up only just a little or hold course from a 45 degree dive from altitude and require only a very small amount of down elevator control for level flight when flying inverted If the Duck pulls out quickly by itself from a 45 degree dive and or requires significant down elevator while flying inverted then it is too nose heavy Conversely if the dive becomes steeper and or n...

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