The Vertex VS28 Series is a lightweight brushless outrunner developed for responsive traditional 3D performance and transmitter-controlled reversible 4D flight. Available in 1550KV and 1950KV versions, it delivers smooth power, fast throttle response, and the hardware flexibility needed for standard prop-saver or compatible 4D propeller installations on approximately 6 to 20 oz foam aircraft.
VS28 Series Overview
3D / 4D Motor
Motor Type
Brushless Outrunner
KV Options
1550KV / 1950KV
Reversible 4D Operation Requires the Correct ESC
The motor alone does not provide switchable reverse thrust. Reversible 4D operation requires the Vertex V17R 3D/4D ESC, a compatible reversible propeller, and correct transmitter setup.
View V17R Reversible ESC
Choose Your Motor
1550KV Option
VS28-05B — Approximately 24 g
Balanced performance for lightweight traditional 3D aircraft and reversible 4D setups using 2S or 3S power.
1950KV Option
VS28-05C — Approximately 23 g
Higher-RPM performance for fast acceleration and rapid directional changes in appropriately matched 3D and 4D setups.
Recommended Starting Setups
Traditional 3D on 2S: 9 × 4.7 Slow Fly propeller
Traditional 3D on 3S: 8 × 4 Slow Fly propeller
Reversible 4D: Begin with a compatible 8-inch 4D propeller on 2S or 3S
1950KV Limitation: A 9-inch 4D propeller is not recommended
Included with the Motor
Vertex VS28 brushless outrunner motor
5.5 mm and 7 mm standard prop-saver hardware
5 mm hub assembly for compatible APC 4D propellers
Propeller installation wrench
Motor mounting hardware
Important Propeller Selection: Match the propeller to the selected motor KV, battery voltage, aircraft weight, and intended flight style. Check motor and ESC temperatures after the first flights and confirm that current remains within the rated operating limits.
Compatible Products and Replacement Parts