{"id":4601,"date":"2026-06-04T11:35:06","date_gmt":"2026-06-04T03:35:06","guid":{"rendered":"https:\/\/pithrust.com\/?p=4601"},"modified":"2026-06-04T11:49:07","modified_gmt":"2026-06-04T03:49:07","slug":"4320-350kv-motor-review-heavy-lift-performance-12s-efficiency","status":"publish","type":"post","link":"https:\/\/pithrust.com\/ru\/4320-350kv-motor-review-heavy-lift-performance-12s-efficiency\/","title":{"rendered":"\u041e\u0431\u0437\u043e\u0440 \u0434\u0432\u0438\u0433\u0430\u0442\u0435\u043b\u044f 4320-350 \u043a\u0412: \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438 \u043f\u043e\u0434\u044a\u0435\u043c\u0435 \u0442\u044f\u0436\u0435\u043b\u044b\u0445 \u0433\u0440\u0443\u0437\u043e\u0432 \u0438 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438 12S"},"content":{"rendered":"
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\u041e\u0431\u0437\u043e\u0440 \u0434\u0432\u0438\u0433\u0430\u0442\u0435\u043b\u044f 4320-350 \u043a\u0412: \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438 \u043f\u043e\u0434\u044a\u0435\u043c\u0435 \u0442\u044f\u0436\u0435\u043b\u044b\u0445 \u0433\u0440\u0443\u0437\u043e\u0432 \u0438 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438 12S<\/h1>\r\n\r\n
\r\n \"Pi\r\n
The 4320-350KV \u2014 Pi Thrust's highest-thrust single motor, purpose-built for 25L+ sprayers and heavy-lift industrial UAVs.<\/figcaption>\r\n <\/figure>\r\n\r\n

Most drone motor reviews give you peak thrust and a spec sheet. Here's the problem: a motor that hits 9.8 kg thrust at full throttle may be useless at 50% cruise \u2014 which is where heavy-lift UAVs spend 80% of their flight time. That's why we tested the 4320-350KV with four different propellers across a full 10-point throttle sweep<\/strong>. Below, we break down exactly what the data says \u2014 and why this motor has become our go-to recommendation for operators lifting 20 kg or more.<\/p>\r\n\r\n

Specifications at a Glance<\/h2>\r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n
Parameter<\/th>\r\n Value<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
\u0420\u0430\u0437\u043c\u0435\u0440 \u0441\u0442\u0430\u0442\u043e\u0440\u0430<\/td>\r\n 4320<\/strong> (43mm diameter \u00d7 20mm height)<\/td>\r\n <\/tr>\r\n
\u041d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0435 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435<\/td>\r\n 350 \u041a\u0412<\/strong><\/td>\r\n <\/tr>\r\n
Configuration<\/td>\r\n 12N14P<\/td>\r\n <\/tr>\r\n
Weight (incl. cable)<\/td>\r\n 248 g<\/strong><\/td>\r\n <\/tr>\r\n
Shaft diameter<\/td>\r\n 6 mm<\/td>\r\n <\/tr>\r\n
Lead wire<\/td>\r\n 16 AWG<\/td>\r\n <\/tr>\r\n
Internal resistance<\/td>\r\n 43.5 m\u03a9<\/td>\r\n <\/tr>\r\n
Rated voltage<\/td>\r\n 12S (44.4V nominal)<\/strong><\/td>\r\n <\/tr>\r\n
No-load current (10V)<\/td>\r\n 1.55 A<\/td>\r\n <\/tr>\r\n
Max power<\/td>\r\n 3,835 W<\/strong><\/td>\r\n <\/tr>\r\n
Peak current<\/td>\r\n 81.6 A<\/td>\r\n <\/tr>\r\n
Bearings<\/td>\r\n NSK<\/strong> (Japanese)<\/td>\r\n <\/tr>\r\n
Magnets<\/td>\r\n N52H<\/strong> (arc)<\/td>\r\n <\/tr>\r\n
Windings temperature rating<\/td>\r\n 220 \u00b0C<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n\r\n

At 248 grams, the 4320-350KV sits in an interesting spot \u2014 it's lighter than the 5315-420KV<\/a> but produces comparable peak thrust on the right propeller. The 12N14P configuration with 350KV means higher torque at lower RPM, which translates to better efficiency with larger propellers.<\/p>\r\n\r\n

Thrust Test: 4 Propellers, Full 10-Point Throttle Sweep<\/h2>\r\n\r\n

We tested the 4320-350KV with four different three-blade propellers on 12S<\/strong> \u2014 scanning every 10% throttle from idle to wide open. Here's the data that matters most. The DBone 15\u00d77.3\u00d73 is our recommended configuration for maximum payload; we include it in full below. The other three propellers are shown in the comparison table that follows.<\/p>\r\n\r\n

DBone 15\u00d77.3\u00d73 \u2014 The Heavy-Lift Configuration<\/h3>\r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n
\u0414\u0440\u043e\u0441\u0441\u0435\u043b\u044c\u043d\u0430\u044f \u0437\u0430\u0441\u043b\u043e\u043d\u043a\u0430<\/th>\r\n Voltage (V)<\/th>\r\n \u0421\u0438\u043b\u0430 \u0442\u043e\u043a\u0430 (\u0410)<\/th>\r\n RPM<\/th>\r\n \u0422\u044f\u0433\u0430 (\u0433)<\/th>\r\n \u041c\u043e\u0449\u043d\u043e\u0441\u0442\u044c (\u0412\u0442)<\/th>\r\n Eff. (G\/W)<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
10%<\/td>\r\n 50.40<\/td>\r\n 0.46<\/td>\r\n 1,815<\/td>\r\n 136<\/td>\r\n 23<\/td>\r\n 5.81<\/td>\r\n <\/tr>\r\n
20%<\/td>\r\n 50.35<\/td>\r\n 1.68<\/td>\r\n 3,378<\/td>\r\n 603<\/td>\r\n 85<\/td>\r\n 7.14<\/span><\/td>\r\n <\/tr>\r\n
30%<\/td>\r\n 50.24<\/td>\r\n 3.96<\/td>\r\n 4,722<\/td>\r\n 1,306<\/td>\r\n 199<\/td>\r\n 6.57<\/span><\/td>\r\n <\/tr>\r\n
40%<\/td>\r\n 50.04<\/td>\r\n 8.58<\/td>\r\n 6,138<\/td>\r\n 2,477<\/strong><\/td>\r\n 429<\/td>\r\n 5.77<\/span><\/td>\r\n <\/tr>\r\n
50% \u2b50<\/td>\r\n 49.74<\/td>\r\n 14.77<\/td>\r\n 7,281<\/td>\r\n 3,632<\/strong><\/td>\r\n 735<\/td>\r\n 4.94<\/span><\/td>\r\n <\/tr>\r\n
60%<\/td>\r\n 49.32<\/td>\r\n 23.98<\/td>\r\n 8,429<\/td>\r\n 5,037<\/td>\r\n 1,183<\/td>\r\n 4.26<\/td>\r\n <\/tr>\r\n
70%<\/td>\r\n 48.81<\/td>\r\n 36.25<\/td>\r\n 9,335<\/td>\r\n 6,412<\/td>\r\n 1,769<\/td>\r\n 3.62<\/td>\r\n <\/tr>\r\n
80%<\/td>\r\n 48.25<\/td>\r\n 48.95<\/td>\r\n 10,225<\/td>\r\n 7,873<\/td>\r\n 2,362<\/td>\r\n 3.33<\/td>\r\n <\/tr>\r\n
100%<\/td>\r\n 46.99<\/td>\r\n 81.61<\/strong><\/td>\r\n 11,409<\/td>\r\n 9,797<\/strong><\/td>\r\n 3,835<\/td>\r\n 2.56<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n\r\n

The critical data point for heavy-lift operators: at 50% throttle<\/strong> \u2014 a realistic cruise setting for a loaded hexacopter \u2014 the motor delivers 3,632g thrust at just 14.8A<\/strong>. That's 4.94 G\/W efficiency, and across six motors on a hexacopter, you get roughly 21.8 kg total cruise thrust<\/strong> while drawing only 89A from your 12S pack. For a 25L sprayer drone, that's exactly where you want to be.<\/p>\r\n\r\n

Four-Propeller Comparison \u2014 Key Data Points at 50% Throttle<\/h3>\r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n
\u041f\u0440\u043e\u043f\u0435\u043b\u043b\u0435\u0440<\/th>\r\n Thrust @50%<\/th>\r\n Current @50%<\/th>\r\n \u041c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0435 \u0443\u0441\u0438\u043b\u0438\u0435<\/th>\r\n Best Eff.<\/th>\r\n \u0418\u0434\u0435\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0434\u0445\u043e\u0434\u0438\u0442 \u0434\u043b\u044f<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
DBone 15\u00d77.3\u00d73<\/td>\r\n 3,632g<\/strong><\/td>\r\n 14.8A<\/td>\r\n 9,797g<\/strong><\/td>\r\n 7.14<\/span><\/td>\r\n Max payload (25L+)<\/td>\r\n <\/tr>\r\n
DBone 13\u00d77.5\u00d73<\/td>\r\n 2,603g<\/td>\r\n 10.4A<\/td>\r\n 8,309g<\/td>\r\n 6.55<\/span><\/td>\r\n Long endurance hybrid<\/td>\r\n <\/tr>\r\n
HQ 13\u00d78\u00d73<\/td>\r\n 3,172g<\/td>\r\n 13.5A<\/td>\r\n 8,714g<\/td>\r\n 7.08<\/span><\/td>\r\n Cinelifter \/ Cinema<\/td>\r\n <\/tr>\r\n
Gemfan 13\u00d710\u00d73<\/td>\r\n 2,913g<\/td>\r\n 12.9A<\/td>\r\n 7,760g<\/td>\r\n 7.18<\/span><\/td>\r\n Fixed-wing \/ Mapping<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n\r\n

One thing jumps out immediately: the 4320 is happiest with props in the 13-15\" range<\/strong>. The 15\u00d77.3\u00d73 gives the highest absolute thrust \u2014 nearly 10 kg per motor at full throttle \u2014 while the 13\" props deliver better top-end efficiency. If your drone runs at 40-60% throttle for most of the flight (which heavy-lift platforms do), the 15\" configuration is the clear winner.<\/p>\r\n\r\n

\r\n \"4320-350KV\r\n
Full throttle sweep data for all four propeller configurations \u2014 40 data points covering every realistic flight condition.<\/figcaption>\r\n <\/figure>\r\n\r\n

Efficiency Deep Dive: Where the 4320 Wins<\/h2>\r\n\r\n

The 4320-350KV has a distinct efficiency profile that sets it apart from smaller motors. Let's look at what the data actually tells us:<\/p>\r\n\r\n

The Sweet Spot: 20-40% Throttle<\/h3>\r\n

With the DBone 15\u00d77.3\u00d73 prop, efficiency peaks at 7.14 G\/W at 20% throttle<\/strong> and holds above 5.77 G\/W through 40%. This is the cruising band for a loaded heavy-lift platform \u2014 and it's where the 4320's 12N14P high-torque design<\/strong> pays off. Fewer poles would give you higher peak RPM, but at the cost of mid-throttle efficiency. The 4320 makes the opposite trade: lower KV, higher pole count, better efficiency where it counts.<\/p>\r\n\r\n

Real-World Flight Math<\/h3>\r\n

Take a hexacopter with a 30 kg all-up weight<\/strong> (airframe + 25L tank + avionics). At hover, each motor needs roughly 5 kg of thrust. With the 15\u00d77.3\u00d73 at 50-60% throttle, each motor delivers 3,632-5,037g \u2014 meaning you need about 60-70% throttle for hover, drawing roughly 18-24A per motor. Total draw: 108-144A on 12S. On a 12S 30,000mAh pack, that gives 12-15 minutes of spray time<\/strong> per charge \u2014 enough to cover 8-10 acres before landing.<\/p>\r\n\r\n

Build Quality: What Heavy-Lift Operators Actually Need<\/h2>\r\n\r\n

At 3.8 kW peak power, the 4320 generates serious heat. That's why we didn't cheap out on the internals:<\/p>\r\n\r\n