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X-RES

2.4.4 Construction Section Mid Span Wing

2.4.4.1 Material Mid Span Wing

1 sheet 3 mm balsa ribs
1 sheet 2.5mm balsa ribs
1 sheet 1.5mm balsa planking center wing
2 sheets 2mm Balsa trailing edge
1 strip 4 x10 mm balsa leading edge
2 strips 4 x 2 mm spruce spar caps outer wing
2 ALU pipe 58x7 mm guide the joiner
1 angle template 5 ° (plywood) alignment of the ribs A-9, B-1 for dihedral
1 angle template 6 ° (plywood) alignment of the ribs to the outer wing B-8, C-1 for dihedral

2.4.4.2 Construction of the Mid Span Wing

The construction of the mid span is similar to those of the outer wing and center wing. The
lower spar is flush with the bottom planking.
Now remove the ribs from the CNC milled sheet, sand for assembly and sort
for size. There are six balsa mid span wing 2.5mm ribs and two 3mm plywood
ribs.
The position of the ribs can be easily determined on the basis of their length and the plan.
Position the spar webbing and ribs over the bottom spar and planking. Glue with CA glue.
Important: Place both outer ribs with the correct angle template.

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Содержание X-res

Страница 1: ... Of 37 Wingspan 1999 mm Length 1220 mm Profile AG Profile modified Wing Area 38 0 dm2 Flying weight from 430 g Wing loading from about 11 3 g dm2 Controls rudder elevator spoiler Dihedral 12 0 CG about 73 76mm ...

Страница 2: ...s Easy handling especially circling in thermals Consistent braking and steering effectiveness during landing The modified Mark Drela airfoil was optimized specifically for rib construction The airfoils coupled with the aspect ratio of 11 6 and almost elliptical lift distribution makes an excellent soarer I have designed a model that allows long flight times with the ability to scan a large area fo...

Страница 3: ...ase cut carefully here so there it is sufficient material for everything Separate out the CNC milled parts only when required The inner corners radius on parts where the mill stops have to be reworked individually Bonds unless otherwise described thin Superglue CA should be used Epoxy 5 minute for fuselage Wing screw connection joiner Aluminum tube CFRP link at the Wing It is explicitly stated in ...

Страница 4: ...ins needle nose pliers Cannula for superglue 0 9 mm are available from the pharmacy Superglue CA 5 Minute epoxy White glue Flat Building board Sealing iron i e Monocote Iron What else is needed Servos e g 2 x Dymond D60 1 6 to 2 kg and 2 x 0 5 kg D45 8mm Battery four cells NmH AAA 800mAh Receiver 4 channel as small as possible and reliable Covering film about 2 5 m Oralight ...

Страница 5: ...selage nose pieces 1 4 mm plywood surface mounting 2 5 mm plywood adjustable tow hook 2 2 2 Fuselage Construction First the CNC milled parts are separated and the webs that hold the parts are trimmed and sanded flush Glue the two piece balsa sides of the fuselage and bottom together Now the 0 8 mm thick plywood reinforcements are glued to the 2mm balsa sides and bottom using white glue The top edg...

Страница 6: ...bottom The two long bottom pieces must be scarfed together On forward fuselage the lower piece is flush with the bottom of the 0 8 mm plywood reinforcement From the end of the plywood reinforcement both the top and bottom 4x4 pieces are 2mm in from the top and bottom edges of the sides The top and bottom sheeting fits inside in this space later Assembled bulkheads and 4x4mm balsa longerons Use a s...

Страница 7: ...S 7 Of 37 Taper the longerons at the rudder cutout so the back end of the fuse can be glued to the rudder Now the pushrod housings are sanded with rough sandpaper and run through the bulkheads but not glued ...

Страница 8: ...fuselage Do not glue yet That is glued later on when the wing adjustment is made with the locking pin Now the pushrod housings can be glued to the fuse bulkheads Ensure the housings are as straight as possible It is recommended that the steel pushrods be inserted to help straighten them A slot still has to be cut into the side wall for the rudder pushrod housing Now the fuselage top is glued The e...

Страница 9: ...7 X RES Fuselage top with pushrod housing shown Glued fuselage bottom Finally the adjustable tow hook and the balsa nose are glued with white glue To accommodate trim weight the nose can be slightly hollowed ...

Страница 10: ...lon wing retention bolt into the plywood retainer plate and put the 3mm plywood wing locating piece on the dowel and in the fuse Measure the wingtip to back edge of fuselage and make sure the distance from each wingtip to the fuse end is the same Make adjustments to the hole in the plywood piece if necessary When wing is lined up glue the ply wing locating piece in the fuselage Remove the wing and...

Страница 11: ...ivot Assembly First glue the two guide parts for the straight tube onto the elevator plate with superglue Then sand the nylon nut on all sides to roughen the surfaces Apply a small amount of Vaseline to nut and bolt threads so glue will not stick to them Thread the bolt into the nut through the horizontal elevator plate Glue the control horn part onto the elevator plate and bolt using epoxy glue S...

Страница 12: ...X RES 12 Of 37 ...

Страница 13: ...e sides for the elevator mounting side plates Install the horizontal elevator plate onto the side plates using a piece of wire Glue the elevator mounting plates to the fuse sides making sure the horizontal elevator plate is parallel and level with the wing Cut the pushrod housing to length ...

Страница 14: ...akes 1 strip 4x10 mm balsa leading edge 2 6x2 mm spruce spar caps for center wing 2 carbon fiber rods 6 mm Ø wing joiners 2 ALU tubes 58x7 mm joiner tubes 1 angle template 5 plywood alignment of the ribs A 9 B 1 for dihedral 2 4 2 2 Construction of the Center Wing The printed plan must be glued together from the individual pages Tape he plans together using the alignment marks on each page Use a l...

Страница 15: ...and sanded to fit on the spruce spar The 3mm balsa spar webbing is also prepared The two ribs adjacent to the root rib have a section for the webs The outer ribs A8 and A9 are made of 3mm plywood An important criterion for distinguishing the ribs All ribs of the inner wing are shorter as you move to the wingtip ...

Страница 16: ...oxy Glue in the 1 5mm plywood reinforcement at the wing mounting bolt position Place ribs on the plan and glue to spar Do not glue ribs to bottom sheeting yet Ribs A9 are glued at a 5 degree angle using the 5 deg jig See below Make sure ribs are perpendiculartothespar Use plenty of glue around the spar and spar webs ...

Страница 17: ...de aluminum tube into ribs A 9 and A 8 Align at 90 to end rib Gap between tube and spar webbing should be filled in with scrap 1 5mm plywood Coat ply filler Al tube and spar webs with epoxy and assemble Picture shows top spar in place but do this step before top spar is glued in so the ply filler can be inserted ...

Страница 18: ... the trailing edge balsa flush with the top of the ribs gluing from the bottom side The wing can be turned right side up and the trailing edge can be sanded to a taper on the top side starting from about 12 mm from the edge so it is about 1mm thick at the trailing edge Masking tape can be used to protect the area that is not sanded ...

Страница 19: ...X RES 19 Of 37 Thereafter the middle part can be taken from the Plan and the bottom sheeting can be fully glued to the ribs ...

Страница 20: ...p of 2 mm balsa is cut from scrap balsa sheet and glued to the front of the ribs Take a long sanding block to make the front edge straight After drying cover the ribs to protect them and sand the 2mm strip to shape for sheeting ...

Страница 21: ...21 Of 37 X RES Mid span wing with spruce spar and glued AL wing joiner tubes Plug end of tube with wood Now the upper sheeting can be glued to the ribs ...

Страница 22: ...par Now through the gap between the strip on the nose and the upper sheeting glue the upper sheeting to the ribs Here it is advisable to use thin needles and take advantage of the fluidity of the superglue Sheeting through the gap from the front are glued to the ribs ...

Страница 23: ...om the beginning to the 2 mm strip and a 4x10mm balsa strip leading edge is glued on Now the middle 1 5mm sheeting is glued on Sand the leading edge to shape using the ply jigs to get the correct shape Each jig has the corresponding rib location on it ...

Страница 24: ...e 0 5mm gap all around the spoiler As shown in the drawing a magnet is located at the middle of the spoiler Insert the spoiler in the Center Wing and at the appropriate place glue the magnets under the 1 5 mm balsa strip Observe the polarity The spoiler servo is glued behind the spar web The servo horn is glued to the flap The pictures below are from a different plane The control wire should be be...

Страница 25: ...gnment of the ribs to the outer wing B 8 C 1 for dihedral 2 4 4 2 Construction of the Mid Span Wing The construction of the mid span is similar to those of the outer wing and center wing The lower spar is flush with the bottom planking Now remove the ribs from the CNC milled sheet sand for assembly and sort for size There are six balsa mid span wing 2 5mm ribs and two 3mm plywood ribs The position...

Страница 26: ...glue the upper spar cap align shear webs and spar caps Remove from the building board and glue the trailing edge from the bottom Glue the bottom sheeting to the ribs forward of the spar Cut scrap 2mm balsa for the false leading edge and glue then sand to the rib s shape Fit and glue upper sheeting 1 5mm balsa just like in the inner wings using thin CA glue Sand the front edge of the sheeting flat ...

Страница 27: ...ng edge of the bottom sheeting Bottom sheeting extends out past the wingtip These photos are not from the X RES and differ in details Fit the spar shear webs and ribs Angle rib C1 for dihedral using the 6 degree ply template Washout 3 4 mm can be built into the wing tip or it can be done with the covering later Glue ribs spar webs and bottom spar together There are no shear webs between the first ...

Страница 28: ...28 Of 37 X RES Make a false leading edge from 2mm scrap balsa Shape top edge for upper sheeting Cut top sheeting so it will extend over the wing tip Glue on upper sheeting ...

Страница 29: ... Span and Wing Tips Cut a vertical slot between the upper and lower spars in the end of the mid span and wing tips Test fit the plywood dihedral braces into the ends of the wings Sand the plywood dihedral so the outer wingtip is 4 8 mm check this dim high and is the same for both sides of the wing The narrower end of the dihedral brace fits into the outer wing Glue the mid span and wing tips toget...

Страница 30: ...30 Of 37 X RES Joining Mid Span and Center wing Sand the joint between the center wing and the mid span wing so there is a good fit between them Glue in the CF anti rotation pegs ...

Страница 31: ...31 Of 37 X RES 2 5 Tail 2 5 1 Tail material 1 sheet 4 mm balsa tail parts 2 5 2 Tail Assembly The tail can be assembled using the blueprint plan Rudder Construction Elevator Construction ...

Страница 32: ...iling edge Sand the leading edge down to 3mm On the leading edge of the rudder and trailing edge of the vertical stabilizer sand the edges round making both sides symmetrical The elevator is sanded to the same airfoil shape as the rudder The 4mm 5 32 drill hole should be countersunk so that a M4 countersunk screw does not protrude Reinforce with hole superglue ...

Страница 33: ...the pushrod tube Put the bent end into the rudder control horn Later glue a short piece of pushrod tube on the end to secure the pushrod in the horn Mounting Tail Plane Cut the M4 screw to length so that it can be screwed onto the elevator pivot Sand the 2 mm CF rods and glue into the holes provided from below so that they project approx 1 5mm below Articulation Tail Plane and Fin Bend a Z in the ...

Страница 34: ...er after 10 m launching at a 45 angle In this maneuver the pilot can easily change the trajectory upward Set the height adjustment for airbrakes at a higher altitude Ballast Camber Anyone who wants to use the X RES for pure leisure fly does not need ballast chamber but in competition it is quite reasonable that the model weight be adapted to the weather conditions For ballast a 10mm diameter mater...

Страница 35: ...in front of the center of gravity then the glider rises perfectly on the hi start and you do not need or only minimally need to get height I wish you much joy in flying thermalling and successful participation in RES competitions Let Your X RES always be insight All the best and have fun Alois ...

Страница 36: ...36 Of 37 X RES Forward fuselage cross section Cross grain balsa 0 8mm ply ...

Страница 37: ...X RES ...

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