Why This 85″ Corsair Requires a True 12S System
At 85 inches of wingspan and over 22 pounds flying weight, this Corsair sits firmly in the giant-scale category. A single 6S system is not sufficient for this airframe. The recommended setup is two identical 6S LiPo batteries connected in series, creating a 12S system. In a series connection, voltage doubles while capacity remains the same, delivering the power headroom required for safe takeoff, sustained climb, and stable mid-throttle cruising.
| Parameter | Specification |
|---|---|
| Wingspan | 85.43″ (2170 mm) |
| Flying Weight | 22.0–23.5 lb (10.2–10.5 kg) |
| Recommended ESC | 120A class |
| Battery Setup | 2 × 6S LiPo (12S total) |
| Connector Type | ESC compatible |
Recommended 6S Battery Specifications
For a 12S warbird in the 22–23 lb range, battery selection is not about extending flight time — it is about maintaining stable voltage under load. Most pilots find that 6S 6000mAh packs represent the realistic starting point. Higher capacity such as 6500–7000mAh can provide additional runtime but adds forward weight that may affect CG.
| Capacity | Suitability | Notes |
|---|---|---|
| 5000mAh | Not Recommended | Operates near current limits at this weight |
| 6000mAh | Baseline | CNHL Recommendation |
| 6500–7000mAh | Extended Runtime | Heavier nose, check CG carefully |
Discharge rating matters as much as capacity. For a 120A-class ESC, most experienced pilots prefer 80C or higher packs to minimize voltage sag during takeoff and vertical climbs.
How to Connect 2 × 6S Packs in Series Safely
To create a 12S system, two identical 6S packs are connected in series using a series harness. The positive lead of one battery connects to the negative lead of the other. The remaining positive and negative leads go to the ESC. Always use:
- Identical capacity and C rating packs
- Similar internal resistance (IR)
- Same charge level before connection
- Properly rated series harness and connectors
Mixing mismatched packs in a giant-scale aircraft increases stress on cells and may shorten battery life.
12S vs 14S: What Actually Makes Sense?
Some pilots discuss moving beyond 12S to 14S for additional throttle headroom and smoother current delivery. While technically possible with compatible ESC and motor combinations, 14S setups introduce higher cost, increased weight, and reduced cross-platform flexibility.
For most builders, a well-matched 12S setup (2×6S 6000–7000mAh) provides more than enough performance for realistic warbird flying without requiring highly specialized battery packs.
Real-World Considerations for Giant-Scale Warbirds
Aircraft in the 22 lb range place significant demand on batteries during takeoff and initial climb. Voltage stability affects:
- Throttle response
- ESC temperature
- Retract reliability under load
- Overall system longevity
Choosing the correct 12S battery setup is not about maximizing speed, but about ensuring consistent and predictable power delivery throughout the flight envelope.
FAQ
What battery setup does the 85″ Phoenix Corsair use?
It runs a 12S system created by connecting two identical 6S LiPo batteries in series.
Can I use 6S 5000mAh packs?
They may operate near their limits in a 22 lb aircraft. 6000mAh is generally considered the safer baseline.
Is 14S better than 12S?
14S can provide more headroom but increases cost and weight. Most pilots remain with a properly configured 12S setup.
What C rating should I choose?
For a 120A ESC class system, 80C or higher is commonly preferred to reduce voltage sag.
Can these 6S packs be used in other aircraft?
Yes. 6S 6000–7000mAh packs are commonly used in 70–85″ electric warbirds and other giant-scale sport models.
Further Reading and Related Collections
For a detailed technical discussion of the aircraft itself — including size considerations, structural positioning, and electric power system analysis — see our in-depth article: Phoenix Model F4U Corsair 85″: A Realistic Look at Size, Quality, and Power .
Pilots operating additional scale aircraft may also explore the broader selection within our CNHL Airplane LiPo Batteries Collection , which includes matched battery configurations for a wide range of electric warbirds and large-scale RC aircraft.
