Technical Support / Motor Selection
UAV Brushless Motor Selection Guide
Pi Thrust manufactures brushless motors for 10-18 inch UAV propulsion systems. Use this guide to compare 3115, 4312, 4315, 4320, 5008, 5215 and 5315 motors by propeller size, rated voltage, maximum thrust, peak current and application.
7
Main motor series
10-18"
UAV propulsion system range
6-12S
Catalog-rated LiPo voltage range
Start by Propeller Size
10″
3115 for surveying, inspection and security UAV applications.
13-15″
4312, 4315, 4320 and 5215 for mid-size and heavy-lift UAV configurations.
15-17″
5315 for agriculture, heavy-lift and large industrial UAV applications.
17″
5008 for extra-large aerial and cinematic UAV applications.
Selection Method
How to choose a drone motor.
Motor selection should be based on the full propulsion setup, not only on model name or maximum thrust.
01
Confirm propeller size
Match the motor series to the planned propeller diameter before checking other data.
02
Confirm voltage
Check the rated LiPo voltage and make sure the ESC plan can support the current requirement.
03
Estimate thrust
Compare the target thrust per motor with catalog maximum thrust and leave room for real flight conditions.
04
Check application
Use the catalog application range as a shortlist, then confirm the final match with Pi Thrust support.
Quick Match
Select by propeller size.
These matches are based on Pi Thrust Motor Catalog 2026 and are intended as a first selection reference.
For final selection, send propeller size, voltage, ESC plan, takeoff weight, payload and application requirement.
10″
Surveying / Inspection / Security
3115, 900KV, 6S, maximum thrust 4,600g.
3115
13-15″
Mid-size UAV / Heavy-lift Inspection
4312, 4315, 4320 and 5215 cover different voltage and thrust requirements in this propeller range.
4312
4315
4320
5215
15-17″
Agriculture / Large Industrial UAV
5315, 420KV, 12S, maximum thrust 8,400g.
5315
17″
Extra-large Aerial / Cinematic UAV
5008, 300KV, 6S, maximum thrust 2,800g.
5008
Motor Data
Pi Thrust motor comparison.
Data source: Pi Thrust Motor Catalog 2026. Actual performance depends on propeller, voltage, ESC, frame and installation conditions.
Model | Propeller | KV | Rated Voltage | Max Thrust | Peak Current | Max Power | Weight | Catalog Applications |
| 3115 | 10″ Prop | 900KV | 6S | 4,600g | 88.27A | 2005.4W | 111.52g | Surveying / Inspection / Security |
| 4312 | 13-15″ Prop | 380KV | 8-12S | 13,000g | 84.16A | 3949.40W | 205.00g | Surveying / Inspection / Aerial Photography |
| 4315 | 13-15″ Prop | 600KV | 8S | 7,200g | 93A | 2767.3W | 218.00g | Surveying / Inspection / Security / Aerial |
| 4320 | 13-15″ Prop | 350KV | 12S | 12,900g | 81.61A | 3834.6W | 248g | Heavy-lift Aerial / Security Inspection |
| 5215 | 13-15″ Prop | 420KV | 8S | 5,500g | 38.33A | 1213W | 300.00g | Agricultural Spraying / Heavy-lift Inspection |
| 5008 | 17″ Prop | 300KV | 6S | 2,800g | 30.00A | 490W | 210g | Extra-large Aerial / Cinematic UAV |
| 5315 | 15-17″ Prop | 420KV | 12S | 8,400g | 116.19A | 5252W | 348.00g | Agriculture / Heavy-lift / Large Industrial UAV |
Catalog data is for selection reference. Confirm the final motor, propeller and ESC match before production use.
Technical Support
Confirm your motor selection.
Send the following details to Pi Thrust before confirming a UAV motor model.
- Propeller size and propeller model
- Battery voltage and ESC specification
- Target takeoff weight and payload
- Application: surveying, inspection, security, aerial photography, agriculture, heavy-lift or cinematic UAV
Contact Us
FAQ
Motor selection FAQ.
Short answers for customers comparing Pi Thrust brushless UAV motors.
Should I choose a UAV motor only by maximum thrust?
No. Maximum thrust is only one reference. Rated voltage, peak current, maximum power, motor weight, propeller size, ESC selection and cooling conditions should be checked together.
Which Pi Thrust models are used with 13-15 inch propellers?
The 2026 catalog lists 4312, 4315, 4320 and 5215 for 13-15 inch propeller applications.
Can Pi Thrust help select a motor for a new UAV project?
Yes. Send propeller size, voltage, ESC plan, target takeoff weight, payload and application requirement to Pi Thrust technical support.
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