Human Powered Bicycle Drive System by Hanna-Dean

[thisbblaze]

U should look up Efros bike it's just like this bike n do they sell them?

[vistigioful]

I have made this just in a different form. I think that my version is a lot heavier than yours. But thats ok. Weight affects acceleration a lot more than it does speed. Please make a video of you sprinting on the bike.

[OSTUTZO]

This is a rolling "stair master" not a bicycle ... very cool HannaDean, and I'm sure it's very fast. How much extra weight does this add ?

[HannaDeanDrive]

@OSTUTZO right now, the weight could be reduced. I am using a lot of carbon steel parts for ease of fabrication. There's about an extra 10 pounds with the added mechanical parts.

[OSTUTZO]

@HannaDeanDrive ... Thanks for the update ... the torque seems potentially unlimited... you know this would never be sanctioned by the UCI, you will have to create new competitions for this type of cycling, high speeds i can see that...

[vistigioful]

I have all that working against me and probably a few other things too. Considering everything working against me, I think that 10.1mph shows potential.

[vistigioful]

After working on it for about a year, I finally got it legitimatley working. Right now I have only one gear ratio multiplier. The chain keeps falling off, but I think I can fix that with another gear ratio multiplier. I was only able to get it up to 10.1mph. However, I have so many things working against me and slowing the bike down such as low gearing, slack in the chain, heaviness, 24" wheels, wide tires, using only one lever, lever not locking immediately, loose feel when pushing on lever.

[HannaDeanDrive]

sorry so long with no updates - just finished a big move - I'll do my best to have some road video up in a week or so, weather permitting

[MueraTelevisa]

Looks very good I'd like to watch it running on the road..

[TimpBizkit]

Interesting but how is this better than pedalling?

[MegaStingers]

for tetraplegique is very good 10 year for my head

[vistigioful]

@blackdubsociety What do you mean?

[vistigioful]

Please comment, what is your opinion on this?

[pik996]

@vistigioful It sounds like you almost get it, but you're not quite there yet. I hope you don't waste too much time and effort on your prototype before you have your "lightbulb moment". It's just another gearing/lever being applied to the gearing/lever that's already on the bike. It's similar to using a huge sprocket at the crank and a tiny sprocket at the rear wheel (ie. faster, but harder to push) except all the extra links on this setup add drag which mean lost power and increased wear.

[vistigioful]

I truly believe this is a great idea.This bike uses a series of gears to multiply the speed of the chain. In addition, you generate more power with the long levers.

[pik996]

@vistigioful There's no such thing as a free lunch. Your legs can only generate a certain amount of power. You can use levers to increase the speed while applying lower torque, or to increase the torque while lowering the speed but either way the power remains exactly the same. Consider- if you put massive long cranks on a bike (ignoring ground clearance issues), you'd be able to apply more torque but you'd have to move your legs much further to make one full revolution.

[vistigioful]

I am currently trying to build one of these.

[vistigioful]

Cmon man put some more videos up.

[vistigioful]

Check this page often.

[vistigioful]

Do you have any kind of lubricant or anything in the primary and secondary to reduce friction between the bar and pipe?

[vistigioful]

How do you have the one way clutches connected to the sprocket in the primary?

[vistigioful]

Whats the best way to get one way clutches or buy them?

[vistigioful]

Do you know of any good road bikes that aren't too expensive ($1200 or less)?

[vistigioful]

What are one way clutches and how do they work?

[HannaDeanDrive]

-should read "one-way" clutches. A lot of force is being applied to the fulcrum, so the clutches have to be strong. I broke a few different types before finding the right clutches and fabricating the pieces needed to put them to use. A machine shop and a little ingenuity is required for some of the parts. I tried using as many off-the-shelf parts as possible, but some components must be custom made.

[vistigioful]

How did you get the materials to make it.

[vistigioful]

Could you explain what you mean by sturdy one-clutches (zero-degree ratchets).

[HannaDeanDrive]

visti- In one of the pototypes I am using clips- so the pedels are connected to the shoes- on other prototyps I have positioned a spring from under the seat to the levers for the return so regular pedels can be used - for the primary, you will need sturdy one-clutches (zero-degree ratchets) Set it up so that you can vary the gearing from drivetodrive. Between lever length, vertical pivot, stroke length, and gearing you will find the sweet spot. BTW - I hope to be posting more video soon.

[vistigioful]

I have a few questions. To make the levers go up after pushing them down I understand you have a spring somewhere in there. What type of spring is it and how do you have it posistioned? Also, when the levers go up how do you keep the chainwheel in the primary drive mechanism from going in the opposite direction?

[vistigioful]

I found the patent and now have a better understanding of how this bike works. If you get the chance could you make a video of you riding this bike on the road.

[vistigioful]

Thats a great invention right there. I can see there is extreme efficiency in that mechanism. You have greatly improved bicycles. Get that thing selling and youll make a lot of money. I couldn't find anything on the bike at the uspto site. Could you give me a link to it or give me more information on finding it.

[vistigioful]

Im very interested. Please give me some more information about this. How do you make one? How do you buy one?

[HannaDeanDrive]

@vistigioful Hello - For the specification visit the uspto website and search for patent # 7717448. There are details and specifications - These are not currently in production, but please feel free to use the design for personal use while crediting the inventor. We are currently seeking licensing partners for production.

[STUCASHX]

I really like your design. I am working on something similar for a recumbent trike.

Can I suggest you move the fulcrum point of the levers down so that the motion of your feet is more vertical.

It seems that once your feet bottom out the motion rearwards saps energy. I think it would be more comfortable too if your feet move in as straight a line as possible.

[bangworx2]

Amazing.

How many km/hour of speed ?

[HannaDeanDrive]

I have had the bike over 120 kph on the trainer. On the road it has been at 56 kph. For higher speeds on the road, I think a fairing is needed.

[echotraveler]

i think its very creative...can you plz make a vid on the road??

its like a stepper mix bike....

[HannaDeanDrive]

I'll see what I can put together in the next couple of weeks. Since this demo, spring returns have been added so that the clip-ons are not needed. The riding is a little more"friendly" now.

[MueraTelevisa]

Looks pretty good!

[BrundukasLT]

it isn't a bike xDDD

[HannaDeanDrive]

I would call it better - consider during this demo the rear wheel rpm was 631 equaling over 50 mph - the extra leverage allows for much higher gears along with the lower physical impact of the ergonomics.

[johnnysjukebox]

interesting...but is this any better than pedalling?