keith firstbrook

Пікірлер

@LL-ue3ek 5 ай бұрын

The drive "wheel" is not circular so there are bumps for the chain to jump up and down between peaks and valleys, resulting in a tensioner vibrating violently. That's why you cannot get this design to commercialize.

@michaelngan99 2 жыл бұрын

A lot of B.S. talk, and stupid loud music, but not a word about how this piece of idiotic device works.

@abelsamthomas6032 2 жыл бұрын

Can you share the CAD model?

@airlinesafety5667 2 жыл бұрын

Hi Keith, I would like to buy a single speed high torque driver system. Would you be able to deliver ??

@mdsha8393 3 жыл бұрын

Can I test this Gear pls? I need to test pls reply

@baidyabiswas4182 3 жыл бұрын

Rear shifter only better option coz fdont shifter will b heavier which will make cycle slower, best option is bigger crank set n smaller rear cog n add back motor can go 70+ km/h

@VacuousCat 3 жыл бұрын

you are not the first tho

@JohnDir-xw3hf 3 жыл бұрын

Where i can buy it?

@quentinradsma7616 4 жыл бұрын

The top small sprocket just behind the main adjustable gear is going to be under major pressure under real use of peddling. Not a good idea.

@Beverlys-Hillbilly 4 жыл бұрын

Pointless! never showed how the variations were achieved,

@ValmisFilm 4 жыл бұрын

2014... it is 2020, never heard of it. Did you get anywere wtih this?

@LTMENDOZAthABG 4 жыл бұрын

This idea just came to my mind so i checked if

@martinda7446 4 жыл бұрын

Looks like it does something similar to having two or three chainrings but no derailleur. Heavy, complicated and pointless. Tell me I'm wrong?

@АндрейВладимирович-р1к 4 жыл бұрын

Какой вес?

@edgarcardenas5476 4 жыл бұрын

Nice try ...but still doesn't make any difference

@keinohrhasi79 4 жыл бұрын

Wight? Costs? Where to buy? :D

@gustavgnoettgen 4 жыл бұрын

Are the teeth sectors just spring loaded, similar to a vario drive?

@keithfirstbrook2695 4 жыл бұрын

Hi Gustav ..….. ratchets

@gustavgnoettgen 4 жыл бұрын

@@keithfirstbrook2695 does it work well?

@keithfirstbrook2695 4 жыл бұрын

@@gustavgnoettgen yeah its better than i thought but still needs £££ to make it into production

@mlgisnotdead7752 4 жыл бұрын

that's pretty stupid.

@brian.louis107 4 жыл бұрын

dont see this going up steep hills very well. Looks to have a very small gear range.

@Артем-щ6ю3ю 5 жыл бұрын

Вариатор изобрели?

@Roedygr 5 жыл бұрын

How does it work?

@Roedygr 5 жыл бұрын

What makes it change gears?

@abz124816 5 жыл бұрын

what is it that you are demonstrating?

@rolffeldmann7438 6 жыл бұрын

One of those videos only wasting time! Awful!!

@ivandobsky4103 6 жыл бұрын

i would have liked to hear the bike sounds / gears changing

@GuyFerguson 6 жыл бұрын

The general response below is so typical of the dim general public. It’s a great idea looks great and I hope on day it gets into production. How can someone not see how this works from the video!

@keithfirstbrook2695 6 жыл бұрын

yeah there is an update on the way .....quite a surprising one .....one that gives the rider a 24% advantage over a standard cycle.......with no added weight .....looks nothing like the one above......yeah that's right 24%.....but its not suitable for humans who don't like music or have no imagination.

@eidBike 6 жыл бұрын

تصليح دراجات--يوجد الكثير من الفيديوهات عن تصليح ولحام الدراجات الهوائية رابط ازي تعمل كوتش للعجلة جنت تيوبلسkzbin.info/www/bejne/iKWxe36LedSKm5o رابط ازي تعمل كوتش العجلة سلك تيوبلسkzbin.info/www/bejne/mHSQlJ-leKannrM رابط داخلى عجلة تيوبلس للعجلةkzbin.info/www/bejne/a5zPnZtqlJt8j7s --الحلقة 148

@350pauli 6 жыл бұрын

I think what your saying is it's an automatic gear change before it becomes to hard to pedal .... bravo !!

@350pauli 6 жыл бұрын

Awsome invention

@jacobriddle7230 6 жыл бұрын

Any more progress

@keithfirstbrook2695 6 жыл бұрын

Hi Jacob yeah there has been quite a lot of progress we have a new product up and running its related to the above prototype.....but totally different .....we are still doing the Science on the idea but the first results are just great .....it reduces the pedaling effort in any chosen gear selection by up to an incredible 50% ........with very little or no weight gain.

@retromaticmike5388 6 жыл бұрын

don't like the music use the button marked mute

@germanborgesxrt 6 жыл бұрын

That model is nice but what happens when you stop to pedaling, centripetal forces make the diameter coming back. And, when you apply force with your foot, it is enough centripetal force to maintain the better diameter?

@frankbaker5174 6 жыл бұрын

That looks ridiculously heavy and like a maintenance nightmare not to mention friction and drag. Clever yes.

@mechtech3227 6 жыл бұрын

I want it

@chuanist 6 жыл бұрын

Music ...sucks.

@suzukispider 6 жыл бұрын

you should talk, and explain it.

@LandRiderJerryautoshift 6 жыл бұрын

Would be very interesting to see this combined with a shift kit. This way lateral chain movement could be eliminated. Then you could have an automatic variable geared motorized bicycle similar to what I currently have. kzbin.info/www/bejne/pnineHx_mdNgY9U Which is ideal to meet legal requirements for small cc engines requiring an automatic transmission system.

@TerenceTang83 6 жыл бұрын

Wow impressed

@tortinwall 6 жыл бұрын

I hope the engineering is better than the truly dreadful video.

@pollywanda 6 жыл бұрын

Horrible music!

@catshepherd3102 6 жыл бұрын

Elegant.

@pauljohnston3884 6 жыл бұрын

A certain poignancy in seeing this and other videos like it, since the ideas contained in all are now many decades old (if you're old enough you saw earlier versions in magazines like Popular Science.) The mechanisms failed to advance beyond the curiousity stage then, and are unlikely to do so now. Most cyclists don't have the interest in efficiency, or any understanding of how variations on an old theme improve it (which many do.) It is now over 30 years since I made and began using an oval front sprocket on my bike, an idea which at that time was over 50 years old. In a city of over a million people, I am still the only such user!