Recent content by Boby

Flyer F is still a winer Flyer F is (or was) available since 1999. The width of Flyer F motor crank is 8cm (3in). 8cm is typical bike crank width. Chuan-Xin Technology motor crank looks far wider. Maybe even this motor crank is uncomfortably wide. I wonder why Flyer F old concept is...

I finally came to the conclusion that perfect ebike is the one designed by the rider. Now I am talking to the frame manufacturer. Any input of experienced ebikers would be warmly welcomed. IDEA It was flecc to say that drive through gears systems can have some advantages and perform...

Cyclone kit works with a modified crank mechanism I saw in Warsaw Bimoto crank mechanism . It is offered by a Cyclone distributor also with Cyclone motors Bimoto electric bikes. The idea and make similiar to Elation kit. This crank transmitted the power generated by Honda engines attached to...

john – I understand that 80% of RPM is the optimum level. What would be the useful RPM range of a brushless electric motor installed in an e-bike (we talk about high/normal speed motors, not direct drive hubs)? Let’s take into consideration the standard motor with the max load RPM – 300...

Additional chain drive resistance: I had never tested the Panasonic system. The idea looks similar to a basic Cyclone kit (picture 1) – one chain shared by the rider and the motor. The Cyclone kit motor mechanism creates a significant chain rolling resistance. It was irritating when riding...

Gentlemen – thank you for your explanations. It sounds very reasonable. You confirmed that motors using gears may be more effective in untypical conditions – eg. at low speeds without pedaling assistance (climbing ability). I still focus on maximum speed. One reason is that I am more...

Do I understand correctly your thesis? You say that driving through gears on e-bikes does not give extra efficiency in standard British (EU) conditions. You must obey a 250W power limit and a 15mph speed limit. A standard motor hub is sufficient and is simpler to built and easier to ride. I...

Flyer F in the market Ladies and Gentlemen, I am trying to find an e-bike for me. Today I found an interesting item at the auction portal - Flyer F. The seller of the bike is quite unaware of the bike previous life which must have been exciting. The key was lost and the lock was replaced...

Thank you for explanations. I started to think about this DH after I fell in a big hole in the snow two weeks ago (standard hardtail bike). Faster you ride more often such things happen. As john pointed out it is the air not tires or suspension to consume power at high speeds. DH has a...

Catic It is produced by Chinese gentlemen (Electrical bicycle CATICGZ). I saw it for the first time at Australian eBay – so probably it was equipped with a 200W motor. The concept is smart – like a Flyer or Panasonic. In my opinion chain drive is most effective. You may climb and ride fast...

energy efficient bike vs. bumpy roads resistant bike Flecc – I am impressed with your analysis. You say that – if you optimize efficiency – the bike suspension is harmful. This conclusion is not popular since suspended bikes look cool, cost more and for these reasons are more popular. No...

TGA electrobike picture is great. Everything was already invented years ago.

Gentlemen, My link for VisforVoltage did not work for any mysterious reason. So I copied the eLation inventor’s letter below. This is the message of Sat, 05/12/2007: Hi Guys, Sorry, long time no see. Been busy on next version of eLation and suppose I have been a bit of a "rock spider"...

For this reason Cyclone kit can be an inefficient assistant for a mountain bike. Cyclone kit has just 8 (max) gears. On the other hand – you may experiment with a complex internal gear hub. Dave – you are right. eLation and Bike Elektro Antrieb are very similar to Cyclone kit. But Cyclone...

I understand your point. Cyclone kit is underdeveloped. Look at eLation or Bike-Elektro-Antrieb. These systems are adaptable to front gears and should work effectively in mountain bikes (pictures from producers’ web sites).