Mont Cenis pass Rolhoff Speedhub, Hybrid serial transmission, Direct drive motor, belt drive: A highly efficient quartet
Data analysis on a
challenging 185 km route with the Tourmalet pass climbed by La Mongie. Of course still in serial hybrid transmission with my trike “TiltDragonFly”.
On a track such as this, the use of Rolhoff Speedhub allows the best performance from the RH212 direct drive without the need to use “statorate” fluid or other cooling accessories to evacuate joule losses.
The motor always operates within its maximum efficiency range regardless of the road gradient.
Overall efficiency increased by energy recovery during braking thanks to an original modification of the Rolhoff speedhub.
The use of standard toothed belts also ensures quiet running and maintenance-free operation.
Data recording analysis
energy consumption data
distance : 184 km
duration : 6 h 55 mn
average speed : 26,6 km/h
ascending elevation : 2335 m
gross energy consumption : 2392 Wh
regenerative braking : 344 Wh soit 16,8 %
net consumption : 2048 Wh
net consumption per km : 11,1 Wh/km
pedal generator production : 585 Wh i.e. 3,18 Wh/km
average hourly production : 84,5 Wh/h
relative consumption : 1463 Wh
elative consumption per km : 7,92 Wh/km
energy produced by the pedal generator
I have finally weighed my trike, empty 70 kg all round
Weight of “TitDragonFly” at the start (with full water and tools): 73 kg
Weight of the driver this morning at the start : 74 kg
gross consumption: total consumption before deduction of energy recovered by regeneration
net consumption: gross consumption – energy recovered by regeneration
relative consumption: net consumption – energy produced by the generator.
Assessment of this new test day in series hybrid transmission
The results of this new test corroborate those obtained previously: the relative consumption depends very little on the relief of the course and its length. With
Edgar Tournon we had already made the same observation throughout the Suntrip 2020 road.
On TiltDragonFly, 2 technological innovations explain this phenomen on to a large extent:
The efficiency of the RH212 engine is optimal (around 82%) both on the flat road and on mountain roads thanks to
the Rolhoff speedhub. The variable regeneration that allows me to recover a significant percentage of the energy used to climb the passes.