J2M Senior Heliman Location: UK
| HSA,
Good question! I was expecting a lot of similarity between the two given the number of common parts and was surprised by the step up in performance.
As to my two models, engine is the same in both but I have an MP2 Q50 exhaust on the Pro so the Pro has a little less power. The Pro has Futaba 9250s on CCPM - same speed (0.1s), slightly less torque (5.5Kg vs 6.5Kg). Both run the same Duralite pack/regulator. Gyro/rudder servo are the same. Blades are the same.
I suspect the lower weight, higher CofG location and the common shaft CCPM arrangement are the biggest contributors (in that order) to the differences in flight performance. I haven't weighed the two but the 3D is noticeably lighter when you compare the two, one in each hand |