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On the road with a bike
29 juin 2011

Independant coasting

Independant coasting
?? what is this... well imagine you're pedalling a lot and get tired.. you want to have a rest so you stop pedalling... should the other one stop pedalling as well for you to relax?? Now what if we are going downhill and both want to relax? Again the...
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14 juin 2011

1st ideas

1st ideas
I thought about the gears.. and also looked at how complicated the chain connection gets between both cranksets... wow... it's gonna be tough... then I thought about this: http://fr.wikipedia.org/wiki/Moyeu_%C3%A0_vitesses_int%C3%A9gr%C3%A9es Here are...
22 juin 2011

Alternative to standard chain

Alternative to standard chain
As I was trying to understand this camber angle stuff i tried to figure out how the transmission could look like... Basically the wheel axle will not be aligned with the crankset... so putting a chain in between might be a bit difficult... Maybe it will...
26 juillet 2011

Direction´s angle

Direction´s angle
Pourquoi les roues assurant la direction pivotent elles autour d´un axe non vertical? -> le concept de la chasse: La rotation de la roue autour d´un axe oblique élève le cadre et le pilote. La masse de l´ensemble crée donc une force de rappel qui ramène...
27 juillet 2011

Frame assembly - Stick-Welding , Brass, MIG or TIG?

Frame assembly - Stick-Welding , Brass, MIG or TIG?
Though upper arguments, some guys are still assembling their bike frame by stick welding. That´s tempting, it would allow more flexibility: Tips for welding: http://en.openbike.org/wiki/Welding_tips I contacted Aleksander Micsiz, from ami design (http://www.amidesign.ch/),...
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14 juin 2011

Idea in pictures

Idea in pictures
So back to Munich I switch on the PC and try to connect to the internet... What I have in mind is some sort of a tandem where you somehow lay on the bike.. I will soon learn that this is called a recumbent bike... what a strange name for a bike... After...
28 juillet 2011

Frame designs - Structural strength

Frame designs - Structural strength
Let´s start some stress calculations to design the frame size and material: First I need to recall a bit of theory in mechanics... And I started also some basic calculations on structurix. Here are the first results for a steal pipe (diameter 48,3mmm,...
19 juin 2011

Speedhub

What is this Rohloff stuff about? speedhub?? A very nice presentation from the Rohloff website: http://www.rohloff.de/en/technology/technical_cd/index.html Baically here are pros and cons I can see: Cons: -More expensive than a standard hub system with...
14 juin 2011

Where the idea started

Vincent, Pauline's brother is taking care of an association for some rare disease that one of his friend's child is suffering from; this is is called Neurofibromatosis. You can find details about this association on their FB: http://www.facebook.com/pages/Association-Erwan/195608423817896...
14 juin 2011

Getting excited

Well really this is way too expensive... and I think I know someone who will be interested and will tell me: let's build it. You can call it providence but then 1h later the doorbell rang.. and guess who? Olivier and Marlene just back from 10 days of...
19 juin 2011

Camber angle??

So we want to have 2 wheels at the back? (or at least that's my idea) but we see many designs with the rear wheels not vertical... This is called camber angle... it took me quite some time to find out the technical term... here it is: http://en.wikipedia.org/wiki/Camber_angle...
25 juillet 2011

Frame material?

fiberglass: too flexible + risk to split in 2 parts for 3D frames aluminium: 1/3 lighter than steel but also 1/3 weacker => bigger or thicker tubes and requires TIG (Tungsten Inert Gas) welding => tricky to weld steel: arc welding is definitely not a...
28 juillet 2011

Frame Assembly - Stick Welding?

La réponse d´Aleksander: Salut Olivier En gros le diamètre de la baguette correspond à l'épaisseur de métal à souder Pour l'ami-4 j'ai utilisé des baguettes de 1.6 et j'ai voulu souder des tubes trop fins de 1.2 mm d'épaisseurs Donc pour du 1.2 mm il...
9 août 2011

Carbon style...

July 24Nicolas Chevillot Salut Nathael, comment va??? long time no see! Je suis en train de me lancer dans la fabrication d'un velo from scratch... je me rappele que t'avais une bonne technique avec le truc en carbone... t'as des bons plans la dessus?...
18 juin 2011

Rainy day in Munich...

It's raining so it's the right time to look what can be found on the internet... Some concept trikes! http://www.ecofriend.com/entry/10-concept-trikes-that-run-green-on-electric-engines/ some webpages http://challengebikes.com/index.php?language=fr&selection=trike-trike-fr...
24 juillet 2011

How do we build it anyway??

Wood could be an easy material to build from... well.. not really good for cycling... Iron, steel, aluminium need some soldering expertise... especially aluminium which is very light but nearly impossible to make... Light is carbon fibers, also this can...
16 juin 2011

Trike in Campeon

Trike in Campeon
How surprising to see 2 trikes in front of my work building!!! Here are the pics:
25 juillet 2011

Frame designs

Frame designs
utahtrikes.com => cheap and robust design . Un tel type de section doit être plus facile à souder!
25 juillet 2011

Frame designs

Frame designs
Lattice frame. Arrière suspendu et cadre en treilli... Avec l´habillage qui va avec: http://www.flickr.com/photos/b52_bent/
15 juin 2011

tandem trikes

Quelques idées: -carénages -géométries http://home.mindspring.com/~kb7mxu/trikes4.htm
19 juin 2011

Use of a speedhub with 2 rear wheels

Seems to be feasible... is it not overcomplicted?? http://www.utahtrikes.com/TRIKE-UTCQUAD.html
19 juin 2011

They're all here

Wide variation of trikes... http://www.utahtrikes.com/Trikes.html
30 juin 2011

Design of a trike..

http://www.amidesign.ch/ch_vph-trike.htm
30 juin 2011

Different types of trikes

Interesting french website: Ekopedia. Describes the trike and compares the different types: http://fr.ekopedia.org/Tricycle_couch%C3%A9 There's an interesting comparison of Tadpole/Delta and Python...
24 juillet 2011

Community

We are not alone!! many people are making their own bikes and there's even a fair close to us! http://www.e-h-b-e.eu/ 30th of March close to Stuttgart ;o))
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On the road with a bike
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