esp32-c3

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-# tube-dat

-

-### PVC tube

-

-- 16 * 1.5mm

-- 20 * 1.8mm

-- 25 * 2.0mm

-- 32 * 2.2mm

-- 40 * 2.3mm

-- 16 * 1.3mm

-- 20 * 1.4mm

-- 25 * 1.6mm

-- 32 * 1.9mm

-- 40 * 2.0mm

-

-

-### small diameter tube

-

-- inner == 3 mm x outter == 5 mm

-- inner == 4 mm x outter == 6 mm

-- inner == 5 mm x outter == 7 mm

-- **inner == 6 mm x outter == 8 mm**

-- inner == 7 mm x outter == 9 mm

-- inner == 8 mm x outter == 10mm

-- inner == 9 mm x outter == 11mm

-- inner == 9 mm x outter == 12mm

-- inner == 10 mm x outter == 12mm

-- inner == 11 mm x outter == 13mm

-- inner == 12 mm x outter == 14mm

-

-- inner == 13 x outter 15mm

-- inner == 13 x outter 16mm

-- inner == 14 x outter 17mm

-- inner == 15 x outter 18mm

-- inner == 16 x outter 19mm

-- inner == 17 x outter 20mm

-- inner == 18 x outter 21mm

-- inner == 19 x outter 22mm

-- inner == 20 x outter 23mm

-- inner == 21 x outter 24mm

-

-

-- outter == 20mm * thickness 2.0 mm

-- outter == 25mm * thickness 2.0 mm

-- outter == 32mm * thickness 2.4 mm

-- outter == 40mm * thickness 2.0 mm

-- outter == 50mm * thickness 2.4 mm

-- outter == 63mm * thickness 3.0 mm

-- outter == 75mm * thickness 3.6 mm

-

-## ref

-

-- [[tube]] - [[BOM]]

-# ESP32-C3-WROOM-02 dat

-

-# foam-dat

-

-

-| Material | Characteristics | Pros | Cons | Best Uses |

-| --------------------------------- | ---------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------- |

-| **EPP** (Expanded Polypropylene) | Soft, flexible, very tough; absorbs impact; easy to hot-wire cut | • Extremely crash-resistant<br>• Easy to repair (heat gun can reshape)<br>• Suitable for beginners | • Surface rough, not very “pretty”<br>• Softer → less precise flying<br>• Slightly heavier | • Beginner trainers<br>• FPV planes<br>• Durable everyday flyers |

-| **EPO** (Expanded Polyolefin) | Stiffer and smoother than EPP; lightweight; moderate strength | • Smooth surface, looks good<br>• Better aerodynamics<br>• Used in commercial foam planes | • Not as crash-proof as EPP<br>• Slightly heavier than EPS | • Most commercial RC planes<br>• Intermediate & advanced fixed-wings |

-| **EPS** (Polystyrene / Styrofoam) | Very light, very cheap, but brittle; breaks easily | • Cheapest foam<br>• Easy to cut and shape<br>• Good for ultra-light gliders | • Extremely fragile<br>• Not good for load-bearing parts<br>• Produces foam dust/balls | • School projects<br>• Indoor lightweight gliders<br>• Not recommended for real RC planes |

-| **Depron / XPS** | Hard, dense, smooth; light but less flexible; precision-cut | • High accuracy for flat-plate builds<br>• Smooth and clean surface<br>• Great for 3D planes | • Can be brittle<br>• Harder to find original Depron | • 3D profile planes<br>• Indoor aerobatic models<br>• Precision foam structures |

-

-# Quick Recommendations

-- **Best for beginners:** EPP

-- **Best for good-looking, aerodynamic planes:** EPO

-- **Best for 3D flat-plate planes:** Depron/XPS

-- **Only for experiments / ultra-light gliders:** EPS

-- [[rod-system-dat]]

-== [[fab-sheet-metal-dat]] - [[fab-dat]]

-## sheet materials

-

-- [[materials-dat]] - [[foam-dat]]

-

-- [[cardboardboard-dat]]

-

-

-- [[sheet]] - [[mechanics]]

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-# stainless-steel-sheet-dat

-

-## 切割 **5 mm 厚不锈钢板** 的可用工具（按安全 & 效率排序）

-

----

-

-## ✅ 最推荐（工业 / 半工业）

-

-### 1️⃣ **激光切割（Laser cutting）**

-- 切口最干净、精度最高

-- 无明显变形

-- 需要外包加工

-

-### 2️⃣ **水刀切割（Waterjet）**

-- 无热影响区

-- 适合复杂形状

-- 成本较高

-

----

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-## ⚠️ 常见且可行（DIY / 车间）

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-### 3️⃣ **等离子切割（Plasma cutter）**

-- 速度快

-- 切口较粗，需要打磨

-- 热影响区明显

-

-### 4️⃣ **角磨机 + 不锈钢切割片（1.0–1.2 mm）**

-- 最常见、成本低

-- 精度一般，火花多

-- ⚠️ 必须夹紧板材、佩戴护具

-

-### 5️⃣ **台式切割机 / 切断锯（Cut-off saw）**

-- 用 Inox 专用切割片

-- 直线切割为主

-- 噪音大、火花多

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----

-

-## 🐢 慢但可控（小尺寸 / 少量）

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-### 6️⃣ **手动弓锯（Hacksaw，24–32 TPI）**

-- 可控、安全

-- 速度慢，体力消耗大

-- 适合短直线

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-### 7️⃣ **电动曲线锯（Jigsaw）**

-- 使用 **不锈钢专用锯条**

-- 速度慢、易跑偏

-- 仅适合小件或曲线

-

----

-

-## ❌ 不适合 / 不安全

-- ❌ 木工台锯

-- ❌ 木工圆锯片 / HSS 木工锯片

-- ❌ 手持圆锯

-- ❌ 薄型高速钢圆锯片在高转速设备上使用