Perfomance tests with new hub motor

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

For this first time I wanted to ride with LOWEST ASSISTANCE LEVEL (corresponds to ‘Legal mode’): Max power used was 280W
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°

Avg speed - Wh consumed - MAX Temp 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)

 

 

Leave a Reply

Close Menu