The V505 Is Heavier. Why Pick the Larger MN6007 II?
Quick Answer
The T-Motor V505 KV260 is our pick when a compact 17-inch VTOL lift station needs high peak thrust. The MN6007 II KV160 is the better endurance choice: it turns a 21-inch prop, weighs far less with its lead, and trades headline output for efficient lift. Do not choose between them by motor diameter alone.
Why the Smaller-Diameter Motor Is the Heavier Hitter
Our current listings make this comparison look backwards. The T-Motor V505 KV260 measures 55.6mm across and weighs 255g including its 600mm leads, while the T-Motor MN6007 II KV160 is 67.2mm across but weighs only 159g including its lead. Stator diameter is not a shortcut to the right propulsion system.
T-Motor rates the V505 for 12S, 52A and 2,500W for up to 180 seconds, with P16×5.4 or P17×5.8 propellers. Its published P17×5.8 test reaches 8,741g thrust at full throttle. That makes it the clear choice here for a VTOL aircraft whose lift motors must deliver strong transition or take-off reserve without swinging a prop larger than 17 inches.
| Specification | V505 KV260 | MN6007 II KV160 |
|---|---|---|
| Recommended battery | 12S | 12S |
| Recommended propeller | P16×5.4 / P17×5.8 | P21×6.3 |
| Weight including lead | 255g | 159g |
| 180-second current limit | 52A | 23.7A |
| 180-second power limit | 2,500W | 1,120W |
Why We Would Still Choose the MN6007 II
The MN6007 II is not the weaker V505. It is a different answer: lower KV, a larger 21×6.3-inch propeller and much lower published current. At 40% throttle in T-Motor's 12S test, it produced 1,444g from 126W, or 11.45g/W. That is the number we care about for a mapping aircraft spending most of its lift cycle near steady hover.
Across four lift motors, that published motor-mass difference is about 384g before allowing for different propellers, mounts or wiring. We would start with the MN6007 II for endurance-led survey work, then validate hover current and thermal margin with the actual airframe. For compact nacelles, stronger transient reserve or a hard 17-inch prop limit, we would start with the V505 instead.
Do Not Size the ESC from Cruise Current
Both listings recommend a T-Motor FLAME 60A 12S ESC, but that does not make the two systems electrically interchangeable. Use the manufacturer's exact motor, propeller and voltage test row, then add a sensible thermal and current margin. Our motor, ESC and prop matching guide explains why a comfortable hover figure cannot set the ESC limit.
If you are still choosing the motor class rather than these two models, start with our motor sizing guide and browse the current brushless motor collection. Our position is simple: design around required thrust, propeller clearance and hover efficiency; KV comes after those constraints.
FAQ
Q: Can I replace a V505 with an MN6007 II without changing anything else?
A: No. The recommended propeller diameter, KV, current demand, motor dimensions and mounting installation must all be checked. Recalculate the propulsion system rather than treating either motor as a drop-in substitute.
Q: Which motor is better for a VTOL mapping aircraft?
A: We would begin with the MN6007 II when endurance and installed mass matter most. Choose the V505 when you need substantially higher published peak thrust from a smaller propeller envelope.
Q: Does 8,741g mean the V505 can hold that thrust indefinitely?
A: No. It is one full-throttle point in T-Motor's P17×5.8 test table. The separate 52A and 2,500W limits are stated for up to 180 seconds, so design around the complete duty cycle and thermal data.