මම මෙ ජෙමිනියගෙන් ආතල් එකක් ගන්න ගමන් ඉන්නෙ flight නැතිවුනොත් එහෙම ලංකාවට sail කරන්න විදිහක් අහනගමන්. අඩි 40හෙ බෝට්ටුවකින් තමයි දැනට අපි දෙන්නා යන්න ප්ලැන් කරන්නෙ.
Estimating the fuel for a ~7,500 nautical mile (nm) journey from ********* to Sri Lanka depends on how much you rely on your sails versus your engine. For a 40–50ft boat, you should plan for a "Motor-Sailing" hybrid model, as you will inevitably face windless zones (doldrums) or need to make time.
Here is the technical breakdown of the fuel requirements.
1. The Fuel Consumption Formula
For a mid-sized blue-water boat (e.g., a 40–45ft monohull with a 50hp–75hp diesel engine):
* Average Consumption: 3–5 Liters per hour at a cruising speed of 6 knots.
* Fuel per Nautical Mile: Roughly 0.6 to 0.8 Liters per nm.
2. Scenario-Based Fuel Estimates
| Scenario | Calculation | Total Diesel Needed |
|---|---|---|
| Pure Sailing (Engine for docking/emergencies only) | 10% of time motoring (~750 nm) | ~500–600 Liters |
| Balanced Cruising (Motoring through calms/doldrums) | 40% of time motoring (~3,000 nm) | ~2,100–2,400 Liters |
| Emergency Delivery (High engine use to reach safety) | 80% of time motoring (~6,000 nm) | ~4,200–4,800 Liters |
3. Storage Challenges (The Logistics)
A standard 40ft boat typically has a built-in tank of 150–250 Liters.
* The Gap: Even in a "Balanced" scenario, you are short by nearly 2,000 liters.
* The Solution: You would need to carry "Deck Fuel" (20L Jerry cans) or install flexible bladder tanks in the bilge.
* Weight Management: Since you are an expert in automotive electronics and weight distribution, remember that 1,000 liters of diesel weighs approximately 850 kg. Placing this too high or too far forward will compromise your boat’s stability in the rough Tasman Sea.
4. Financial Cost (2026 Estimates)
Based on current March 2026 global averages (~$1.46 USD/Liter), here is your estimated budget for the "Balanced" scenario:
* NZ/Australia Leg: ~$1.85 AUD/L
* Indonesia Leg: ~$0.80 - $1.10 USD/L (cheaper, but higher risk of contaminated fuel)
* Total Fuel Budget: $3,500 – $5,000 NZD for the full trip.
Recommended "Safety Reserve"
Maritime best practice is the Rule of Thirds:
* One third to get there.
* One third to get back/divert.
* One third for emergencies.
Would you like me to help you design a schematic for a high-capacity lithium charging system that would minimize your engine run-time for this voyage?