On my most recent Low Racer Solar Tilting Trike (LRSTT) I have installed a ‘9 Continent’ RH 212 hub motor on its 20″ front drive wheel.
After roughly 6000 KM I have to say that I am really happy of this solution!
Here below there are some tests I have performed on the same road I have already done several tests in the previous years:
– 2019 with Falco hub motor (26″ wheel)
– 2020 with Falco motor having added “Statorade” ferrofluid (26″ wheel)
It is a 20km ascent (‘Casera Razzo’) with an average steepness of 5% and maximum of 14%: we go from 750m up to 1750m with an altitude gain of 1000m.
This year’s tests
So in 2021 I wanted to use the same approach with my new bike and with the new RH 212 hub motor.
Therefore I decided to start doing similar tests I have performed in previous years.
The objective was to check how the motor TEMPERATURE, the CONSUMPTION, the POWER and the SPEED are mutually related.
1) First test
At Pradibosco (altitude = 1000m) the temperature was only 38° (the LOWEST….).
At Casera Razzo it was 42° (again the LOWEST …):
I always kept max power < than 280watts with total ascent time 1h16′
MIN speed was around 14km/h, AVERAGE SPEED was 17 km/h
2) Second test
Here the objective was to go up using slightly higher assistance level, in order to check the relationship with Max Temp.
In this test I was using a Max Power of 400W of assistance.
At Pradibosco the temperature was 40° (last year it was more than 80° Celsius!).
At Casera Razzo Max Temp was 47°: very good result, even without having used Statorade!
Average speed was around 20km/h, with Min speed = 16 km/h.
3) Third test
Here the objective was again to increase the power used, in order to check the relationship with Max Temp.
In this test I was using a Max Power of 500W of assistance.
At Pradibosco the temperature was 42° (2° higher than previous test).
At Casera Razzo Max Temp was 49°: (even here 2° higher than previous test)
Average speed was around 22km/h, with Min speed = 17 km/h.
Total time was less than 1 hour = 54′.
4) Fourth test
Here the objective was again to increase the power used, in order to check the relationship with Max Temp.
In this test I was using a Max Power of 600W of assistance.
At Pradibosco the temperature was 42° (like previous test).
At Casera Razzo Max Temp was 53°: (4° higher than previous test)
Average speed was around 25km/h, with Min speed = 22 km/h.
Total time was again very fast = 46′.
5) Fifth and last test
For this final test I wanted to increase once more the power used.
So I decided to use a Max Power of 700W of assistance.
At Pradibosco the temperature was 47° (the highest, 5° more than previous test).
At Casera Razzo Max Temp was 57°: (the highest, 4° more than previous test)
Average speed was around 29km/h, with Min speed = 24 km/h.
Total time was the FASTEST ever = 42′.
In the following chart we can see a graphical comparison of the most relevant data for these 5 tests:
– Average speed
– Power used in Wh
– Maximum temperature reached in C°
As we can clearly see from above graph:
1) motor TEMPERATURE is still directly related with POWER used: by raising the assistance level the motor temperature also increases.
1) motor TEMPERATURE is also directly related with SPEED (Avg and Min) :by incrementing speed we see that motor temperature also increases.
As a general remark we can also say that the RH212 hub motor, on a 20″ wheel is an excellent solution with no overheating (at least on this test conditions)
When we compare it with last year solution we can see that:
– the Max Temp reached previous year with Falco motor on 26″ wheel was 80° (with Statorade)
– With the RH212 on 20″ wheel, the Max Temp reached was 57° (without Statorade)