Bolt PWC · parts and equipment
R5.1 · gear mounts fit without pads
R5.1 closes the gear-deck gap in the four printed mounts. Each bearing base is now 7 mm thick and seats directly against the existing plywood deck. No separate bearing pads are needed. Use the same M4×30 and M3×25 deck bolts with washers and locknuts; the base + deck + doubler stack is 7+6+6 = 19 mm. Check actual washer thickness and full locknut engagement. Keep the supplied print orientations and inspect the sliced layers with supports off before printing.
Current R5 mount revision
Simpler mounts and numbered assembly diagrams · Complete current build plates · Required hardware changes
Use R5 mount instructions instead of earlier split-mount diagrams. Other airframe assembly instructions remain applicable. Print and dry-fit the mounts first.
Interactive 3D viewerFree · name and email required
Bench-build revision: geometry and assembly details updated; physical fit, structural and flight testing remain outstanding.
Quantities are installed unless marked as workshop/fixture. Confirm the exact version, availability and delivered hardware before buying. Earlier generic gear/axle and regulator proposals are superseded below.
| Quantity | Item | Specification | Source |
|---|---|---|---|
| 1 | Motor | Scorpion SII4020-420KV, original specified motor | Manufacturer / specification, Manufacturer / specification |
| 1 | ESC | Hobbywing Platinum 100A V3, model 30203900; Fixed Wing mode; BEC set to 6.0 V | Manufacturer / specification, Manufacturer / specification |
| 6 | Servos | Hitec D645MW: two ailerons, two flaps, one elevator and one rudder | Manufacturer / specification |
| 1 | Receiver | User AR631+ SPM-1031 with NX8 | Manufacturer / specification |
| 1 | Battery | SPMX56S1006S5000/IC5. Nominal 139 ×42 ×58 mm; verify padding, strap and lead clearance inside 165 ×55 ×60 reserve. | Manufacturer / specification |
| 1 | Purchased propeller | Purchased Master Airscrew 15 ×7 three-blade candidate and correct metal adapter/M8×1 nut; measure current on fully charged 6S. | Manufacturer / specification |
| 2 | Non-reversing Y leads | One for aileron pair and one for flap pair; mechanically orient servos for matching movement. | Manufacturer / specification |
| 4 | Wing extension leads | Planning lengths: two 450 mm and two 1000 mm. Route first and select actual lengths. | |
| 4 | Canopy magnets | Four 8 ×3 mm axial discs; two attracting pairs. | |
| 4 | Motor bolts | M4×0.7, metal washers; length from mount thickness plus verified motor engagement. | Manufacturer / specification |
| 24 | Servo fasteners | M2.5 through-bolts/nuts with supplied Hitec grommets and eyelets, four per servo. | Manufacturer / specification |
| 8 | Strut rod ends | igus EBRM-04 RH, M4×0.7; 4 mm ball bore, 5 mm ball width, 15 mm housing.8 mm chosen thread engagement; minimum 7 mm. | Manufacturer / specification |
| 8 | Rod-end studs | M4×30 steel studs; 8 mm in rod end, 3.2 mm jamnut, 15 mm printed base, captive M4 nut. Check bottoming. | |
| 8 | M4 jamnuts + captive nuts | Eight of each. Standard 3.2 mm nut thickness is the nominal cut-length calculation; measure actual hardware. | |
| 8 | Strut pivot bolts | M4×35 partly threaded with two washers and one locknut each. Unthreaded shank must span ball/spacers; verify real runout. | |
| 16 | Ball spacers | Metal 4.2 mm ID ×6 mm OD ×3.5 mm long. Seat on ball faces; never clamp housing. | |
| 4 | Wing fork fastener pairs | Each fork: M4×20 plus M3×16, washers and locknuts. PWC has 3 mm rib+3 mm backer; PC has 8 mm rib. | |
| 4 | Root fork fastener pairs | Each fork: M4×16 and M3×14, washers and locknuts in accessible inner pocket. | |
| 2 | Main wheel | DU-BRO500TL, 127×38.1 mm; enlarge axle bore concentrically to 6 mm, within maker’s 1/4-inch enlargement limit. | Manufacturer / specification |
| 2 | Main axle stock | igus SWM-06 steel shaft, cut 100 mm each. Confirm 6 mm shaft tolerance and actual collar fit before cutting. | Manufacturer / specification |
| 6 | Split shaft collars | Ruland MSP-6-F:6 mm bore, 16 mm OD, 9 mm width. Use supplied screws; manufacturer limit and retention test apply. | Manufacturer / specification |
| 6 | Axle shims | Metal washers, nominal 6.2 mm ID, 12 mm OD, 1 mm thick. Three per axle; measure real stack. | |
| 1 | Plywood gear doubler | 110×80×6 mm aircraft birch ply. Four existing Ø4.4 mm holes plus four new Ø3.3 mm anti-rotation holes; use R5 drilling template at 100%. | |
| 2 | Hardwood deck rails | 100×10×10 mm; beside doubler on top of original deck. Bond to deck and side frames after adhesive coupon tests. | |
| 4 | Gear cradle bolts | M4×30, washers and locknuts. R5.1 7 mm printed base seats directly on the deck; 19 mm nominal stack. Check full locking engagement. | |
| 4 | Carbon gear legs | 12 mm OD/10 mm ID. Use the PWC-specific cut table; do not substitute PC lower nodes or cuts. | |
| 4 | R5 anti-rotation bolt sets | M3×25, two 7 mm OD washers and one M3 locknut each; X356/394,Y±25. |
For unchanged carbon/wood members, retaining hardware, servo linkage lengths and materials, also use the source cut lists and drawings linked in the build guide. Fit all actual ends before marking rods; do not treat a viewer centerline as a bare rod cut length.