does anyone use really big batteries?

[bdebde]

Originally Posted by ReV:-O

if i should get a 1521, which one should i get?

1521/1D 2900kv
1521/1.5D 1900kv
1521/1Y 1577kv
1521/2D 1425kv
1521/2.5D 1200kv
1521/1.5Y 1050kv
1521/2.5Y 630kv
1521/3Y 525kv

as you can see, all except the 1D have lower kv ratings, so they will be slower than the 1515/1y. i dont think it will be possible to achieve 60mph with a 1521

The 1521 1Y is popular for 6s, and I don't see why you think you won't achieve 60 mph on a 1521...

Differential Ratio: 4.09
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 20
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.008
Spur/Pinion Ratio: 2.3 : 1
Total Ratio: 9.407 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 64.22 mph (103.15 km/h)
Estimated Adjusted Speed: 59 mph (94 km/h) - 9% loss
Effective KV Value: 1577
KT constant: 0.86 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...