Latające skrzydło RC, które Loftsmith zaprojektował z jednego promptu

Testy inżynierskie

Nazwy testów i parametrów pochodzą prosto z silnika CAD i są po angielsku.

• ✓Battery reaches the balance pointbalance at 20.0 % MAC = 212 mm behind the root LE needs the battery centre at y 68; the bay slides it 65 to 96 mm
• ✓Nose weight fits the nose tip40 g of lead (26 x 7 x 20 mm) ahead of the battery, overlap 0.0 mm³; room for 57 g
• ✓Nose weight stays modest40 g of lead = 3.7 % of all-up weight (limit 5 %); LW-PLA wing panels are the next way to cut it
• ✓Battery fits the bay, front and backoverlap 0.0 / 0.0 mm³; 31 mm of slide, loads straight down through a 40 mm wide opening
• ✓ESC and receiver fit their side baysoverlap 0.0 / 0.0 mm³; they slide in sideways under the skin, before the battery
• ✓Spar tunnel stays inside the joint face1.6 mm of PLA above and below the 8 mm tube at the panel joint (75 % chord)
• ✓Wing loading1083 g all-up on 18.6 dm² = 58 g/dm²; stall about 11.5 m/s (CL 0.7). Limit 60 g/dm² and a stall under 12 m/s for a firm hand launch; the plan's 35 g/dm² is not reachable with 0.8 mm PLA skins
• ✓Enough thrust to hand launchabout 800 g static thrust (estimate) for 1083 g all-up = 0.74 : 1 (want 0.6+)
• ✓Carbon spar at the panel root (4 g pull-up)80 MPa in an 8x6 mm carbon tube (allow ~250 MPa)
• ✓Joiner at the panel joint (4 g pull-up)57 MPa in a 6x4 mm carbon tube (allow ~250 MPa); the glued PLA joint face shares the load
• ✓Spar and joiner buried in the wing1.2 mm of PLA round the 8 mm spar out to 230 mm (100.0 % inside) and round the 6 mm joiner, 60 mm into each panel (100.0 %)
• ✓Spar and joiner don't clashthe 8 mm spar stops 40 mm short of the panel joint on its own shear web; the joiner rides the 40 % chord web behind it
• ✓Anti-twist pins buried at both joints3 mm carbon pins, 11 mm into each face, bosses 100.0 % inside the skin
• ✓Internal webs print without supportdiagonal webs lean at most 27° from vertical with the panel standing on its root
• ✓Wing inner panel fits the A1 bed190 mm tall standing on its root; 274 x 21 mm footprint needs 209 mm turned 45°
• ✓Wing inner panel stands steady while printingits centre of mass (y 210) sits 59 mm inside the root face (y 60 to 269); print with a 5 mm brim
• ✓Wing outer panel fits the A1 bed230 mm tall standing on its root; 323 x 19 mm footprint needs 242 mm turned 45°
• ✓Wing outer panel stands steady while printingits centre of mass (y 358) sits 28 mm inside the root face (y 203 to 386); print with a 5 mm brim
• ✓Fits the A1 bed standing on its side160 mm tall; 282 x 51 mm footprint needs 236 mm turned 45°
• ✓Centre filament target153 g of PLA (target 170 g)
• ✓Wing panel filament target361 g of PLA for all four panels (target 400 g)
• ✓Elevon sizeabout 3.30 dm² = 18 % of the wing (aim 12-25 %), 28 % of the local chord
• ✓Elevons swing ±15° clear of the wingtightest gap at the hinge face 0.9 mm (V below and Λ above the hinge line at 22°); ends cut square to the hinge with 0.8 mm gaps
• ✓Hinge pockets stay under the skin1.0 mm of top skin over the thinnest end of the strip pockets
• ✓Hinge strip flex0.8 mm bought CA hinge bends over 3.6 mm of free length: 2.9 % surface strain at 15° (keep under ~10 % for long life)
• ✓Elevon halves fit the A1 bed on end201 / 201 mm tall standing on their square ends
• ✓Elevon joint pin buried3 mm carbon pin, 11 mm into each half; boss 100.0 % inside the skin
• ✓Servo fits the wing depthMG90S lying flat: 1.4 mm of top skin over the pocket, 1.1 mm above the cover plate
• ✓Servo pocket clear of spar and joinerpocket walls vs spar / joiner sleeves: 0.00 / 0.00 mm³
• ✓Servo travel for ±15° elevonservo horn hole 12.3 mm from the shaft, control horn hole 15.1 mm below the hinge: ±15° needs ±19° of servo
• ✓Servo torque (estimate)about 4.9 N·cm at 22 m/s full throw (hinge-moment coefficient 0.25 assumed) vs ~18 N·cm MG90S stall; keep under half
• ✓Control horn at servo stall2.3 MPa at the horn root with 15 N on the pushrod (servo stalled), along the layers; allow 16.7
• ✓Control horn swings clear of the wingoverlap at +15 / 0 / -15°: 0.0 / 0.0 / 0.2 mm³
• ✓Pushrod runs clear74 mm pushrod under the skin; 0.00 mm³ overlap with the wing, cover, elevon and horn
• ✓Servo lead channel stays inside the skin11 x 6 mm channel for the 15 x 8 x 4.2 mm plug, 135 mm long: 100.0 % inside with its 0.8 mm walls
• ✓Servo cover sits flushthe flat plate stands up to 0.7 mm proud of the curved skin at its edges
• ✓Servo and cover are fastenedservo: 2 tab screws 6 mm into the cover lugs; cover: 2x M2 into heat-set inserts with 1.6 mm boss wall
• ✓Prop clears the trailing edgeblade tips run 5.0 mm behind the swept trailing edge at 102 mm radius; swept disc overlaps the airframe by 0.0 mm³
• ✓Spar covered where the tail thins100.0 % of a 1.2 mm skin round the 8 mm spar is enclosed across the middle 64 mm, with the pod fitted
• ✓Pod bolts clamp solid PLAthe centre tail is 100 % solid round each M3 bolt, so clamping cannot crush a hollow skin
• ✓Pod carries the motor on a hard landing0.14 MPa across the layers of the 1.2 mm PLA shell at a 10 g landing (motor + prop on a 43 mm arm); allow 5.0
• ✓Prop parked clear on landingwith the ESC brake set the prop stops level; its hub bottom sits 15 mm above the pod belly, which touches down first
• ✓Motor and plate are fastenedmotor: 4x M3x6 through the plate into its 16x19 holes; plate: 3x M3x8 into heat-set inserts, 5.3 mm from the plate edge (need 5.1), heads 0.3 mm clear of the motor can
• ✓Pod filament target26 g of PLA for the pod and plate (target 40 g)
• ✓Winglet size (yaw stability)two winglets add 1.14 dm² = 6.1 % of the wing area (aim 6-9 %)
• ✓Winglet pegs keyed into a solid tip2x 4 mm square pegs, 7 mm deep, 0.15 mm glue gap; 4.3 mm of tip above and below each pocket; bosses 99.9 % inside the skin
• ✓Winglet root in a side gust1.4 MPa where the plate leaves the tip (1.7 N side load at 22 m/s, CL 1, taken on half the tip chord), along the layers; allow 16.7
• ✓Winglet filament target14.7 g of PLA each (target 16 g)
• ✓Winglet fits the A1 bed163 x 68 mm lying on its outer face
• ✓Hatch sits flush without clashinghatch vs centre overlap 0.05 mm³; top cut from the pod surface, 0.2 mm gap all round, resting on 2.5 mm side ledges and the rear bulkhead; 17 g
• ✓Hatch stays on in flightsuction about 2.3 N at 22 m/s (pressure coefficient -1 assumed); the 6 mm front tongue takes half, two 6x3 mm magnet pairs hold ~10 N at the back
• ✓Battery held downvelcro on the cradle ribs sets its slide position; the hatch skin or its keeper rails sit 1.2-1.5 mm above the battery along its whole length (a 2 mm foam strip on the rails takes up the play)
• ✓Motor wires pass to the pod5.7 mm tall x 8 mm wide gap between the magnet pads, over the bulkhead and out the 7 mm rear notch into the pod slot: room for three 16 AWG leads
• ✓Magnet pockets stay inside the bulkhead3.8 mm of PLA under each 6x3 mm magnet pocket
• ✓battery 3S 2200 goes in25 poses along its path clear of every part.
• ✓ESC 30 A goes in42 poses along its path clear of every part.
• ✓receiver goes in41 poses along its path clear of every part.
• ✓nose weight (lead) goes in36 poses along its path clear of every part.
• ✓servo MG90S R goes in23 poses along its path clear of every part.
• ✓servo MG90S L goes in23 poses along its path clear of every part.
• ✓servo plug R goes in60 poses along its path clear of every part.
• ✓servo plug L goes in60 poses along its path clear of every part.
• ✓driver: servo tab screw (bench) goes in15 poses along its path clear of every part.
• ✓driver: cover screw goes in15 poses along its path clear of every part.
• ✓motor 2212 goes in20 poses along its path clear of every part.
• ✓motor lead (3.5 mm bullet) goes in18 poses along its path clear of every part.
• ✓driver: motor plate screw goes in15 poses along its path clear of every part.
• ✓driver: pod bolt goes in15 poses along its path clear of every part.

Regulowane wymiary