
ECO 2316C V2 Brushless Outrunner Motor Set, 2-3 Cell, 1250Kv, Dual Sky
Dual Sky - 51653 Ideal for electric airplanes weighing between 600g & 1.4kg. How to choose the right thrust for you application? Well, there is no hard and fast rule as there isn't a single "ideal" thrust-to-weight ratio (TWR) for all airplanes. It depends heavily on the aircraft's purpose, with militar...
Dual Sky - 51653
Ideal for electric airplanes weighing between 600g & 1.4kg.
How to choose the right thrust for you application?
Well, there is no hard and fast rule as there isn't a single "ideal" thrust-to-weight ratio (TWR) for all airplanes.
It depends heavily on the aircraft's purpose, with military fighters needing high TWR (1 to 1) for combat performance, while commercial aircraft use lower TWRs (0.3-0.5 to 1) to prioritize fuel efficiency. A TWR of greater than 1.0 is required for vertical takeoff and rapid climb, while a lower ratio, around 0.1-0.3, can be sufficient for stable, level flight in gliders or efficient cruise for light private & commercial planes.
My rule of thumb when it comes to performance is to decide what sort of scale performance you are wanting (remember, you don't have to use all the throttle). I typically choose due to this anywhere from 0.5 to 0.75 to 1 TWR depending on the performance I want.
For high performance applications, Like serious aerobatics or 3D 1.0 to 1.25 to 1 TWR is my go to.
It is all personal preference though.
NASA's Glenn Research Center says

- Weight - 72g
- Battery - 2 to 3 Cell LiPo, 7.4V to 11.1V
- ESC - 40A
- KV - 1250KV
- Thrust @ 100% - 2 Cell 1.302kg & 3 Cell 1.842kg
- Prop - 2 Cell 13x6.5E & 3 Cell 10x7E
2 Cell Battery Specs

3 Cell Battery Specs


- ·See product description for included items.
Assembly notes coming soon — ask Shane if you need a hand before your first flight.
Dispatch — Orders dispatch within 1–2 working days. Tracked courier NZ-wide; delivery typically 1–3 working days depending on location. Rural delivery adds a day.
Cost — Free over $150. Flat $9.50 under. Oversized airframes may carry a freight surcharge — shown at checkout.
Click & collect — Free pickup from 9 North Avon Road, Christchurch. After-hours by appointment — text ahead.
Returns — 30-day returns on unflown, as-new items. Crash damage isn't covered, but Shane stocks the spares to put it right.
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Questions before you buy? Shane's happy to talk motor choice, CG, or whether this model suits your flying site — no sales script, just straight answers from someone who fixes the real thing for a living.
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