Tag Archives: motorcycle

Edward Hartel system and proposal for Hub Centre Steering Moto2


Due to the www.lamoto2.es project I have received some interesting mails with bikes and suspension systems. I´ll try to publish them.

Here is the first one:  

I have a mixed background between cars and motorcycles having worked in motor racing (european formula car racing and 500 cc GP motorcycle racing) for some 10 years…
In my spare time I am building a new motorcycle concept of which the rear suspension is finished, which is currently employed in a Suzuki 1200 Bandit for testing, but it will be part of a totally new motorcycle concept. The new bike with fully adjustable single sided front and rear suspension will be powered by a Norton rotary engine coupled to a CVT transmission.
The reason why I started my project was that I firmly believe that there is room to improve on the current telescopic front fork design as it has some major design flaws which can not be changed, but just slightly improved. Bearing this in mind and my admiration for the alternative suspension designs dating back to the Ner a Car bike up to the latest effort by James Parker I decided I needed to design my own bike. The thing I wanted to change the most was the fact that I want a split-up between the four actions/forces: steering, braking, shock absorber and spring. In this way I could give a different ratio to the spring and to the shock absorber and seperate the steering, shock and spring from the braking forces as it does with the telescopic front fork.
At the same time with the multi link suspension units one could also implement anti-diving and anti-squat in a more controllable way then possible with the telescopic fork and the classic swingarm. However what was/is missing in all these alternative front-end designs is that this should also go hand in hand with a new front tyre design, capable of handling the different loading and grip levels. All these bikes were relying on tyres designed for telescopic front forks thereby undermining the potential of the alternative design.
At the moment I am still working on the front end which hopefully should see the living day lights this year (I have the front axle, wheel is being modified to install a rim mounted brake rotor, shock absorber, steering controls). Why do I say this year, because I have been working on this bike for quite a number of years now, but with limited funding (I am paying for all the work/parts myself) and do all the design work in the late hours of the day, after I finish my day time job and my familiar duties. Unfortunatelly there is very little room in Holland for these kind of projects.
I have enclosed a series of pictures on the rear suspension, which I have been test riding (many hundreds of kilometers) during the summer of 2010 on various roads to be able to find out if the road holding and durability is at least equivalent to the standard swing arm. Although the set-up is a bit of a compromise as I wanted to obtain the original lay-out as well in order to test back to back with the Suzuki swing arm, and not change the entire frame, the outcome of the testing was very good in terms of feedback and stability.



Obviously Edward it’s a master of motorcycles and I hope he will find a bit of time to spend in the Moto2.
I think it’s a very interesting bike. What do you think about it? 

He also sent me a very interesting paper and some pictures of a bike I’ll publish in other post.  

Thanks a lot Edward! 


La Moto2: Hub-Centre-Steering front suspension System 2 (Demonstener-Difazio-Parker)

Originally posted on www.lamoto2.es by the autor.


It’s based on the mentioned systems. It’s main advantage it´s the arm placed over the wheel. It’s relationed in some way with the Ecosse Spirit system. It´s like system D-D but I think it can be lighter.
The biggest inconvenient it’s probably the cooling. There’s less free space for the radiator in the front part of the bike. 
Both systems, as you can see are rod-end free for a better precision, even if they are more complicated and heavier.

What do you think about these systems?

Any idea for a better performance?

 Do you a have a better system and you want to see it on the racetrack? 

I wait for your comments!

La Moto2: Hub-Centre-Steering front suspension System 1 (Demonstener-Difazio)

Happy new year dear Readers!!

The project Lamoto2 it’s going really well.
We’ve been thinking about publishing it worldwide with the help of www.thekneeslider.com even if this can make the project too much big for our human resources. However I think we’ll do it because it’s a great chance to meet people interested in this kind of projects.
I’ve done the first proposals while we’re waiting for the readers designs. Readers are really interested and they are mainly giving their opinions and some of them are proposing their ideas.

FIRST SYSTEM it´s called D-D (Demonstener-Difazio)

It exploit the best of both systems. It has a double swing arm single-sided or a double swingarm on both sides. It uses a commercial Vyrus rim and it’s really light an efficient.
irst you can see is the headstock, it´s placed inside the hub. It´s a preliminary design so doesn´t matter too much how is it made. The headstock it’s a part of the system that DOESN’T TURN.
There we have the Hub. It turns with the steering. It has big bearing with small section and so a reasonable weight.
The hub wears also the supports of the callipers. We must still calculate if the headstock allows the loads they produce.
 The direction come from a bended plate that works mainly in shear mode so it´s strength enough to hold the efforts.
 Over the wheel we must continue with a telescopic cylinder that can carry the steering effort with a compass or with a grooved shaft.

 The most elegant solution it’s the Cannondale steering system with needle bearings.

 The swingarms can be one-sided or both sided depending of the stress analysis results. We’ll choose the one with better performance.

Read also System 2! 

And off couse visit www.lamoto2.es

RAD02 Corsa Evo PURSANG by Radical Ducati & Beltrance.com

Here is the PURSANG!

As you can see these are really busy days…

This is the new and amazing bike by RadicalDucati.

They ask Beltrance.com to do a clay model for a carbon fiber Solo Seat and this is the result.

The material we use was Clay Chavant Medium, worked with a simple hot gun.

The process was long but the result it´s beautiful!

Here are some extra pictures of the making off.

I hope you like it!

You can purchase it or any of their components! Even in the States.

Remember we need your help in the www.LAMOTO2.es open design project!

Build a MOTO2 with us!

Project Center-Hub-Steering LaMoto2 starts!

Finally I can present the LAMOTO2 project!

First Center-Hub-Steering Moto2

If you ever wanted to participate in the engineering and design of a real race bike, the time has come.

Beltrance.com, Demonstener and LA MOTO magazine start a joint venture. We have sponsors, good ideas and a lot of work to do!

On the Spanish kiosk you can find LA MOTO magazine of this month and in the web www.lamoto2.es the complete information about this amazing project.
Unfortunately, for the time being the web is only in Spanish but this site will be the English loud-speaker of this project.
So I´ll publish the most relevant information and the key papers and of course I´ll try to publish the best ideas you propose.

Thanks for being there and remember we need your help!

Carlos Beltrán Carrión

Beltrance.com & Demonstener Engineer