⚡ Built for heavy payload + long endurance

FlySpark Mark 4 (15″) is a factory-assembled heavy-lift FPV platform designed for payload missions, inspection, mapping, and long-range analog FPV operations.
This is not a “parts bundle” — it ships prebuilt, prewired, configured, and field-ready.

Big-prop + low-KV + high-capacity Li-Ion = smoother lift, better efficiency, and mission-stable flying (when built correctly). For 15″ class drones, 16,000–20,000mAh battery sizing is commonly used for endurance + payload balancing.

🔥 Key Selling Points (why this kit is different)

✅ Heavy-Lift Rated Design (Up to 8kg)

• Max payload capacity: up to 8kg (configuration-dependent; see note in specs table)

• Smart spec approach: recommended “working payload” up to ~7kg, while 8kg is peak/max, which aligns with how other 15″ heavy-lift kits are typically positioned (rated vs max).

✅ 20Ah Total Li-Ion Power (2×10Ah included)

• Real mission battery capacity included in the kit (not “bring your own battery”)

• Li-ion cell voltage reference: 3.7V nominal, 4.2V fully charged.

✅ ELRS Control Link Included

• ExpressLRS (ELRS) is an open-source RC link designed for high refresh + low latency + long range, with support across 900MHz and 2.4GHz ecosystems.

✅ 2.5W Analog FPV (range-first setup)

• Analog FPV is chosen for low latency + long-range flexibility

• In analog FPV, higher VTX power generally improves range/penetration (antennas + environment still matter).

✅ Extra-strength custom frame build

• Your build includes custom reinforcement for higher rigidity and better handling under load.

📦 What you get (Included in this Ready-to-Fly kit)

✅ Complete prebuilt FlySpark Mark 4 15″ drone (assembled + wired)
✅ 15″ reinforced carbon-fiber frame (custom strength improvements)
✅ 4× 600KV motors
✅ 4-in-1 ESC (100A–120A class) (see specs)
✅ Flight Controller (installed & configured)
✅ GPS module (installed)
✅ ELRS receiver (installed)
✅ 2.5W 5.8GHz VTX + FPV camera (installed)
✅ Battery included: 2× 10Ah Li-Ion = 20Ah total 🔋

❌ Not included (clear & honest)

❌ FPV Goggles
❌ RC Transmitter (Radio TX)

📊 Performance Specs Table (separate “performance” section)

⏱️ Flight time estimate (transparent math, not fake claims)

Your battery is 20Ah Li-Ion. Total energy depends on series count:

• If built as 6S: nominal energy ≈ 22.2V × 20Ah = 444Wh (6S full is 25.2V)

• If built as 8S: nominal energy ≈ 29.6V × 20Ah = 592Wh (because 8×3.7V nominal)

Estimated flight time = Battery Wh ÷ Average power draw (W)

Example (6S 444Wh):

• 600W avg → ~44 min

• 900W avg → ~29 min

• 1200W avg → ~22 min

• 1500W avg → ~18 min

⚠️ Heavy payload pushes power up fast. If you want me to publish a confident flight-time number on the website, give me: AUW (all-up weight) + payload kg + props + cell count (6S/8S).

🧾 Hardware Specs Table (separate “hardware” section)

⭐ Quick “Marketing Highlights” block (copy/paste)

• 🚀 Up to 8kg max payload (heavy-lift rated)

• 🔋 20Ah total Li-Ion included (2×10Ah)

• 🛰️ GPS installed

• 🎮 ELRS installed (open-source, long-range low latency)

• 📡 2.5W 5.8GHz VTX (range-first analog FPV)

• 🧱 Custom reinforced carbon frame for strength under load

• ✅ Prebuilt / prewired / mission-ready kit