Всем привет.
Начинаю свой новый проект шоссейного электровелосипеда, способного проехать 100 км за 3 часа. Если кто-нибудь знает, где можно купить легкую зеленую раму с низкой верхней трубой и под дисковые тормоза, напишите об этом. Если есть какие-нибудь идеи - тоже пишите:)
Дальше описание на английском:)
The goal of the project is to make lightweight (17 kg) and cheap (1500$) electric bike, on which ordinary cyclist with average power 150 W can compete in 100 km road race with trained professionals with average power 300-400 W cycling on expensive road bikes (3000-10000$).
1. I did not like cycling on road bikes, I do not fill confident and safe, and my average speed is only 25 km/h, so I am moving too slow. Practically all ebikes made by different companies have limit 25 km/h and really small battery, so on them I can not cycle 100 km faster than in 3 h.
2. All electric bikes should be done based on battery.
For example, if the battery can give only 10 A for a long time, the best choice could be a lightweight motor in a front wheel (such as 2.2 kg QQ100 motor). If the battery can give 20 A for a long time, the best choice could be a middrive motor (such as 4 kg BBS-02). If the battery can give 30 A or more, the best choice could be 5-10 kg DD motor in rear wheel.
2. To compete with trained professionals, cyclist on the ebike should be able to go with average speed at least 35 km/h without help of peloton.
Based on my experience, for 100 kg cyclist with average power 150 W for QQ100 motor for such speed the average consumption should be 300 W, for BBS-02 motor and bike with 50 mm wide tires 450 W, and more than 500 W for bike with heavy DD motor.
3. I tried LiFePO4 (which are too heavy), Li-ion (both high current and high capacity cells) - which have too few cycles and for this project I can go for LiPo and their quite low density of energy 150 Wh/kg and quite low price 40 $/kg.
4. So the total weight of ebike is Wbike+Wmotor+RJ+Wbattery. Price is Pbike+Pmotor+RJ+Pbattery.
For QQ100 motor light bike can be used, W=8+2.5+6=16.5 kg, P=1060+200+240=1500$.
For BBS-02 motor light bike still can be used, but based on budget limit lightest available bike will be 11 kg bike, W=11+4+9=24 kg.
P=440+700+360=1500$.
For heavy DD motor I would not go below 13 kg bike, W=13+5+10kg=28 kg.
P=900+200+400=1500$.
On all three bikes a 100 kg cyclist with 150 W average power should be able to go 100 km in 3 h.
5. Using my 11kg Boardman fitness bike with 2.2kg QQ100 motor and 3 kg LiPo battery, 35mm tires and 2x9 system I was able to go on it as on single speed bike with ratio 50/15 with average speed 34 km/h (average cadence 77 rpm) for more than 1h. In 5% rise I was able to go 20 km/h (cadence ~ 45 rpm) instead of 25 km/h on proper gear (motor power is around 500 W). In 5% decent I was able to go 56 km/h (cadence ~ 125 rpm) instead of 57 km/h on proper gear (motor power is around 0W).
So if the race will not have many more than 5% hills, in order to save money and weight on the bike, single speed version ebike could be a good way to go.
6. Key points for bike, most suitable for me - green color flat bar hybrid bike with trapeze frame (for easy boarding) and disk brakes (for good braking during rainy weather).
I could not find such frame for quite a long time, so if someone have it or know where I can buy it, please let me know. Without this frame, my Boardman together with QQ100 motor and large 5.5 kg 48 V, 27 Ah battery is quite close solution to the project. On this bike I can cycle 100 km faster than in 3 h.
Начинаю свой новый проект шоссейного электровелосипеда, способного проехать 100 км за 3 часа. Если кто-нибудь знает, где можно купить легкую зеленую раму с низкой верхней трубой и под дисковые тормоза, напишите об этом. Если есть какие-нибудь идеи - тоже пишите:)
Дальше описание на английском:)
The goal of the project is to make lightweight (17 kg) and cheap (1500$) electric bike, on which ordinary cyclist with average power 150 W can compete in 100 km road race with trained professionals with average power 300-400 W cycling on expensive road bikes (3000-10000$).
1. I did not like cycling on road bikes, I do not fill confident and safe, and my average speed is only 25 km/h, so I am moving too slow. Practically all ebikes made by different companies have limit 25 km/h and really small battery, so on them I can not cycle 100 km faster than in 3 h.
2. All electric bikes should be done based on battery.
For example, if the battery can give only 10 A for a long time, the best choice could be a lightweight motor in a front wheel (such as 2.2 kg QQ100 motor). If the battery can give 20 A for a long time, the best choice could be a middrive motor (such as 4 kg BBS-02). If the battery can give 30 A or more, the best choice could be 5-10 kg DD motor in rear wheel.
2. To compete with trained professionals, cyclist on the ebike should be able to go with average speed at least 35 km/h without help of peloton.
Based on my experience, for 100 kg cyclist with average power 150 W for QQ100 motor for such speed the average consumption should be 300 W, for BBS-02 motor and bike with 50 mm wide tires 450 W, and more than 500 W for bike with heavy DD motor.
3. I tried LiFePO4 (which are too heavy), Li-ion (both high current and high capacity cells) - which have too few cycles and for this project I can go for LiPo and their quite low density of energy 150 Wh/kg and quite low price 40 $/kg.
4. So the total weight of ebike is Wbike+Wmotor+RJ+Wbattery. Price is Pbike+Pmotor+RJ+Pbattery.
For QQ100 motor light bike can be used, W=8+2.5+6=16.5 kg, P=1060+200+240=1500$.
For BBS-02 motor light bike still can be used, but based on budget limit lightest available bike will be 11 kg bike, W=11+4+9=24 kg.
P=440+700+360=1500$.
For heavy DD motor I would not go below 13 kg bike, W=13+5+10kg=28 kg.
P=900+200+400=1500$.
On all three bikes a 100 kg cyclist with 150 W average power should be able to go 100 km in 3 h.
5. Using my 11kg Boardman fitness bike with 2.2kg QQ100 motor and 3 kg LiPo battery, 35mm tires and 2x9 system I was able to go on it as on single speed bike with ratio 50/15 with average speed 34 km/h (average cadence 77 rpm) for more than 1h. In 5% rise I was able to go 20 km/h (cadence ~ 45 rpm) instead of 25 km/h on proper gear (motor power is around 500 W). In 5% decent I was able to go 56 km/h (cadence ~ 125 rpm) instead of 57 km/h on proper gear (motor power is around 0W).
So if the race will not have many more than 5% hills, in order to save money and weight on the bike, single speed version ebike could be a good way to go.
6. Key points for bike, most suitable for me - green color flat bar hybrid bike with trapeze frame (for easy boarding) and disk brakes (for good braking during rainy weather).
I could not find such frame for quite a long time, so if someone have it or know where I can buy it, please let me know. Without this frame, my Boardman together with QQ100 motor and large 5.5 kg 48 V, 27 Ah battery is quite close solution to the project. On this bike I can cycle 100 km faster than in 3 h.
Всем привет.
Начинаю свой новый проект шоссейного электровелосипеда, способного проехать 100 км за 3 часа. Если кто-нибудь знает, где можно купить легкую зеленую раму с низкой верхней трубой и под дисковые тормоза, напишите об этом. Если есть какие-нибудь идеи - тоже пишите:)
Дальше описание на английском:)
The goal of the project is to make lightweight (17 kg) and cheap (1500$) electric bike, on which ordinary cyclist with average power 150 W can compete in 100 km road race with trained professionals with average power 300-400 W cycling on expensive road bikes (3000-10000$).
1. I did not like cycling on road bikes, I do not fill confident and safe, and my average speed is only 25 km/h, so I am moving too slow. Practically all ebikes made by different companies have limit 25 km/h and really small battery, so on them I can not cycle 100 km faster than in 3 h.
2. All electric bikes should be done based on battery.
For example, if the battery can give only 10 A for a long time, the best choice could be a lightweight motor in a front wheel (such as 2.2 kg QQ100 motor). If the battery can give 20 A for a long time, the best choice could be a middrive motor (such as 4 kg BBS-02). If the battery can give 30 A or more, the best choice could be 5-10 kg DD motor in rear wheel.
2. To compete with trained professionals, cyclist on the ebike should be able to go with average speed at least 35 km/h without help of peloton.
Based on my experience, for 100 kg cyclist with average power 150 W for QQ100 motor for such speed the average consumption should be 300 W, for BBS-02 motor and bike with 50 mm wide tires 450 W, and more than 500 W for bike with heavy DD motor.
3. I tried LiFePO4 (which are too heavy), Li-ion (both high current and high capacity cells) - which have too few cycles and for this project I can go for LiPo and their quite low density of energy 150 Wh/kg and quite low price 40 $/kg.
4. So the total weight of ebike is Wbike+Wmotor+RJ+Wbattery. Price is Pbike+Pmotor+RJ+Pbattery.
For QQ100 motor light bike can be used, W=8+2.5+6=16.5 kg, P=1060+200+240=1500$.
For BBS-02 motor light bike still can be used, but based on budget limit lightest available bike will be 11 kg bike, W=11+4+9=24 kg.
P=440+700+360=1500$.
For heavy DD motor I would not go below 13 kg bike, W=13+5+10kg=28 kg.
P=900+200+400=1500$.
On all three bikes a 100 kg cyclist with 150 W average power should be able to go 100 km in 3 h.
5. Using my 11kg Boardman fitness bike with 2.2kg QQ100 motor and 3 kg LiPo battery, 35mm tires and 2x9 system I was able to go on it as on single speed bike with ratio 50/15 with average speed 34 km/h (average cadence 77 rpm) for more than 1h. In 5% rise I was able to go 20 km/h (cadence ~ 45 rpm) instead of 25 km/h on proper gear (motor power is around 500 W). In 5% decent I was able to go 56 km/h (cadence ~ 125 rpm) instead of 57 km/h on proper gear (motor power is around 0W).
So if the race will not have many more than 5% hills, in order to save money and weight on the bike, single speed version ebike could be a good way to go.
6. Key points for bike, most suitable for me - green color flat bar hybrid bike with trapeze frame (for easy boarding) and disk brakes (for good braking during rainy weather).
I could not find such frame for quite a long time, so if someone have it or know where I can buy it, please let me know. Without this frame, my Boardman together with QQ100 motor and large 5.5 kg 48 V, 27 Ah battery is quite close solution to the project. On this bike I can cycle 100 km faster than in 3 h.
Начинаю свой новый проект шоссейного электровелосипеда, способного проехать 100 км за 3 часа. Если кто-нибудь знает, где можно купить легкую зеленую раму с низкой верхней трубой и под дисковые тормоза, напишите об этом. Если есть какие-нибудь идеи - тоже пишите:)
Дальше описание на английском:)
The goal of the project is to make lightweight (17 kg) and cheap (1500$) electric bike, on which ordinary cyclist with average power 150 W can compete in 100 km road race with trained professionals with average power 300-400 W cycling on expensive road bikes (3000-10000$).
1. I did not like cycling on road bikes, I do not fill confident and safe, and my average speed is only 25 km/h, so I am moving too slow. Practically all ebikes made by different companies have limit 25 km/h and really small battery, so on them I can not cycle 100 km faster than in 3 h.
2. All electric bikes should be done based on battery.
For example, if the battery can give only 10 A for a long time, the best choice could be a lightweight motor in a front wheel (such as 2.2 kg QQ100 motor). If the battery can give 20 A for a long time, the best choice could be a middrive motor (such as 4 kg BBS-02). If the battery can give 30 A or more, the best choice could be 5-10 kg DD motor in rear wheel.
2. To compete with trained professionals, cyclist on the ebike should be able to go with average speed at least 35 km/h without help of peloton.
Based on my experience, for 100 kg cyclist with average power 150 W for QQ100 motor for such speed the average consumption should be 300 W, for BBS-02 motor and bike with 50 mm wide tires 450 W, and more than 500 W for bike with heavy DD motor.
3. I tried LiFePO4 (which are too heavy), Li-ion (both high current and high capacity cells) - which have too few cycles and for this project I can go for LiPo and their quite low density of energy 150 Wh/kg and quite low price 40 $/kg.
4. So the total weight of ebike is Wbike+Wmotor+RJ+Wbattery. Price is Pbike+Pmotor+RJ+Pbattery.
For QQ100 motor light bike can be used, W=8+2.5+6=16.5 kg, P=1060+200+240=1500$.
For BBS-02 motor light bike still can be used, but based on budget limit lightest available bike will be 11 kg bike, W=11+4+9=24 kg.
P=440+700+360=1500$.
For heavy DD motor I would not go below 13 kg bike, W=13+5+10kg=28 kg.
P=900+200+400=1500$.
On all three bikes a 100 kg cyclist with 150 W average power should be able to go 100 km in 3 h.
5. Using my 11kg Boardman fitness bike with 2.2kg QQ100 motor and 3 kg LiPo battery, 35mm tires and 2x9 system I was able to go on it as on single speed bike with ratio 50/15 with average speed 34 km/h (average cadence 77 rpm) for more than 1h. In 5% rise I was able to go 20 km/h (cadence ~ 45 rpm) instead of 25 km/h on proper gear (motor power is around 500 W). In 5% decent I was able to go 56 km/h (cadence ~ 125 rpm) instead of 57 km/h on proper gear (motor power is around 0W).
So if the race will not have many more than 5% hills, in order to save money and weight on the bike, single speed version ebike could be a good way to go.
6. Key points for bike, most suitable for me - green color flat bar hybrid bike with trapeze frame (for easy boarding) and disk brakes (for good braking during rainy weather).
I could not find such frame for quite a long time, so if someone have it or know where I can buy it, please let me know. Without this frame, my Boardman together with QQ100 motor and large 5.5 kg 48 V, 27 Ah battery is quite close solution to the project. On this bike I can cycle 100 km faster than in 3 h.
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