ADverrun XS vers. 2 contra drive

DESCRIPTION

Adverrun F3A Contadrive - Latest version July 2021

The world wide known contradrive, now even better.

This drive features an increased output power of ~3.5kw and typically spins props at ~200 rpm more than the previous version. At the same, weight is reduced by ~10% down to 475g - 560g (depending how it's measured). Various other changes aim at better maintainability and ease of installation.

The latest update is the result of a process that took about 1 1/2 years during which they have built multiple prototypes with different gear reduction ratios. Team Adverrun tested 10+ different motors/winds to find the best configuration for the system. Two drives with very different configurations entered final evaluation and we worked with pilots around the world to assess those options identifying the best drive. So while it may look like a minor update this revision is actually the result of a long and pretty open process to build the best contra drive for F3A.  

 Front: 22x20 / Rear: 22x22 (recommended)

Front: 22x20 / Rear: 22x20

Front: 20x20 / Rear: 20.5x20.5

Front: 22x18 / Rear: 22x20 (can be used - but we found it a bit too slow)

Front: 23x20 / Rear: 23x22 (can be used - but current concumption is quite high)

FEATURES

• Output Power: approx. 3.5 kW
• Weight: 475-560g (depending how it's measured)
• Motor: Kontronik Kondor-XL 20-55 (Special Edition for Adverrun)