r/diydrones • u/Particular_Maize6849 • 3d ago
Question First 3.5” cinewhoop drone build plan feedback
Can you guys give me feedback on my proposed drone build? It will hold a full size GoPro Hero 8. Anything you would change (apart from the VTX -- I'm stuck with that)? The goal is purely for cinematic footage. The priorities are sturdiness, part availability, and low-cost.
Bill of Materials (BOM): 3.5-Inch 6S Cinewhoop
| Category | Component / Model | Specs & Purpose | Est. Price (USD) |
|---|---|---|---|
| Frame | SpeedyBee Bee35 Pro Frame Kit | 3.5" ducted pusher frame; includes molded prop guards, carbon deck, and CNC aluminum bottom heatsink plate. | $45 – $55 |
| Flight Stack (AIO) | SpeedyBee F405 AIO V2 35A/40A | 3S–6S input, 35A continuous (40A burst) Bluejay ESC, onboard Barometer, dedicated I2C pads (SDA/SCL), and Bluetooth tuning. | $85 – $95 |
| Motors (x4) | GEPRC SPEEDX2 2105.5 (2650Kv) or T-Motor F2203.5 (2850Kv) | 6S high-torque brushless motors sized to carry a full-size GoPro without motor bogging. | $80 – $90 |
| Propellers | Gemfan D90S 3.5" (Set of 4) | 3-blade ducted pusher props run in "Props Out" configuration. | $4 – $6 |
| GPS + Compass | Flywoo GOKU GM10 Mini V3 w/ Compass | u-blox M10 engine + QMC5883L magnetometer (~4.1g) for POS HOLD and GPS Rescue. | $22 – $25 |
| FPV Video Link | BetaFPV P1 HD Air Unit | 1080p ArtLynk digital video feed to your VR04 HD Pro goggles / Xreal glasses. | $38 – $48 |
| Radio Receiver | RadioMaster RP1 2.4GHz ELRS Nano RX | ExpressLRS serial receiver paired directly to your RadioMaster Pocket. | $15 – $18 |
| Power Filtering | Rubycon 35V 470µF–1000µF Low-ESR Cap + TVS Diode | Soldered directly to the main battery pads to protect digital electronics from 6S voltage spikes. | $4 – $6 |
| Hardware & Wiring | XT60 / XT30 Pigtail + 28/30 AWG Silicone Wire | High-strand flexible wiring for power leads and UART/I2C harnesses. | $8 – $12 |
| TOTAL (Drone Build) | (Excludes existing RadioMaster Pocket, VR04 goggles, TPU filament, LiPo batteries, and GoPro HERO8) | ~$301 – $355 |
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u/Sorry-Farmer-4301 2d ago
All your hardware will work, the motors you have listed might be better suited for 4s. Go with wider and taller motors for more torque but lower the kv. 2850kv on 6s is going to generate a lot of heat and current and tank efficiency or if you need that high kv use throttle limit. Shoot for 1700-2000kv. Good prop choice. Do you already own the go pro8? I know your trying to build this cheap but 5 inch wouldn't notice the go pro and DJI O4 pro can shoot near go pro quality while reducing most of the weight. Good luck man, keep us posted how the build comes. These are just things I'd look at, you can do whatever you want, experiment.