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Kyosho Ultima RB5 2wd

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Est qu'un d'entre vous a des news sur le Proto 4x2 qui roule depuis les dernier championnat du Monde en Italie.

06Cactus2wd17.jpg

Est qu'ils vont enfin se décider a le sortir ou pas ?

:youpi:

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Alors ce chassis n'était qu'un chassis LABO un vrai chassis proto...

Travail réalisé par M.Pavidis qui a largement contribué au développement du B4 chez AE.

Sur ce chassis son repris le chassis de l'ultima.pas mal de pièces proviennent de chez LOSI.

Au finale la voiture se résumeré à une architecture de BK2 avec une transmission de B4.

KYOSHO s'est pour cela accordé les services d'un pilote Japonai qui possède chez eux le meme statut que YUICHI KANAI pour le service electrique TT et bien sur de MASAAKI HIROSAKA papa de Masami.

donc wait and see WORLD 2007 en terre JAPONAISE...la voiture est toujours développée bien sur.

++ ;)

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Merci de ta réponse, c'est sympa...

;)

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Le celebre Ultima de chez Kyosho est enfin de retour dans une version plus aboutie que jamais.

ultimarzb501.jpg

rb5chassis.jpg

rb5chassisunderside.jpg

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Kyosho Ultima RB5 Competition 2WD Buggy

Did you know that Kyosho is one of the three companies that have taken an IFMAR world title with their 2WD electric buggy? For those of you who remember the Ultima you'll remember Kyosho's roots run deep in off road. We're excited to see the new kit and what it has to offer...here's the Kyosho official press release.

Kyosho Ultima RB5 Competition 2WD EP Buggy

Feb. 14, 2007 - Kyosho announces the new Ultima RB5 electric racing buggy. It's a virtually all-new design that is the result of years of R&D and includes the collective experience of the world's most experienced RC racing drivers and engineers from the world's most experienced RC racing company. The main goal of the new Ultima RB5 is simple - to win the next IFMAR World Championship.

The new Ultima RB5 only shares rear hubs with the Lazer ZX-5 and a few common hardware items, but the essential and distinguishing components of the car, such as the chassis, transmission, bulkheads, shock towers, suspension and the sleek aerodynamic body, are all new. Each aspect of the car is specially designed and tested to produce maximum performance. Likewise, the materials chosen for this new Ultima are exhaustively tested - all with the goal to create the ultimate no-nonsense competition car that's ready to take on the world.

Chassis - The chassis plate is light and strong, featuring a specially formulated carbon fiber composite for the best balance of performance and durability. Strategic braces molded into the chassis enhance the stiffness without adding any unnecessary weight. Separate front and rear "clips" allow fast and easy removal of the front or rear end of the car, which makes maintenance and repair much easier. Designed to accept stick packs and racing-style 6-cell matched packs, the RB5 chassis features an adjustable battery mounting position that allows you to shift weight bias to suit track conditions and your driving style.

Transmission - The new transmission features a smaller, more compact housing that keeps the motor as low and close to the transmission as possible, which reduces CG and improves bump handing. The three-gear transmission features an internal ball differential that uses standard 3/32-inch diff balls and 1/16-inch thrust balls. The differential is also externally adjustable, and a dust cover fits over the adjustment holes so the thrust bearing lasts much longer. An injection molded gear cover is included, which better fits the motor plate to minimize dust and debris for longer gear life.

Rear Suspension - The rear suspension arms are symmetrical so a single replacement arm can be used on either side of the car, saving money and space inside your pit box because you don't need to carry as many replacement parts. The inside of the arms are attached to the chassis using separate suspension mounts, which will allows anti-squat adjustment. The rear wheel hubs feature three lower hinge-pin holes, which allow modification of the ride height with minimal disturbance of the suspension geometry. Vertical ball studs for the both the inner and out rod ends of the upper link mean the rear suspension geometry can be fine-tuned with shims.

Front Suspension - Longer, straighter and symmetrical suspension arms connect to a narrow front bulkhead. The bumper/skid plate, suspension block, nose plate and front bulkhead all come together to form a very rigid assembly, to which the front suspension arms mount. The standard position of the suspension mount produces 25 degrees of hinge pin angle in the front suspension arms, but simply flipping the suspension mount increases the hinge pin angle to 30 degrees. The added flexibility of having adjustable hinge pin angles means you have more options when it comes to setting up your car. Like the rear arms, a single replacement arm can be used on either side of the car.

Offset steering hubs make high-speed handling a dream, while floating axles ride in bearings that are mounted in the hub instead of the wheel This moves the weight of the bearings inboard for more responsive suspension, the bearings are under less stress, and they're better shielded from the elements. This means the front wheel bearings last longer and run smoother. The front track width is also easily adjusted, which means the amount of steering response is easily increased or decreased for track conditions and driver preference.

Steering Assembly - Ball bearings provide smooth movement of the steering bellcranks, which are mounted on the chassis at the same angle as the suspension arms. This eliminates bump steer and produces more accurate Ackerman geometry throughout the entire range of steering motion. The steering plate (center link) features horizontally mounted ball studs, which mean Ackerman can be fine tuned using shims behind the ball studs, offering a nearing infinite range of adjustment.

Captured Hinge Pins - A simple button head screw captures all the outer hinge pins of the Ultima RB5. The rear inner hinge pins are truly captured between the suspension mounts, and the notched inner front pins are secured with a setscrew through the front suspension mount. This means that the hinge pins are much more secure and less likely to come loose.

Low-Profile Shock Towers - The front shock tower is mounted as far back on the chassis as possibly, as are the shocks, to keep the mass as low as possible. Likewise, the rear shock tower is also designed to keep a low profile, yet allow enough suspension travel to ensure the best possible handling. The shock towers are molded from an exhaustively tested composite, which is much more costly to produce than shock towers made from woven graphite, but will also provide greater durability.

Threaded Aluminum "Triple" Shocks - Kyosho is well known for silky smooth shocks and the new "Triple" shocks included with the Ultima RB5 are no exception. The shock body consists of three major components - a top cap, threaded body, and a lower cap. The aluminum shock bodies feature a threaded spring pre-load collar for quick and easy adjustment. The threaded adjuster features an O-ring that prevents the preload settings from moving, which ensures consistent performance from start to finish. The lower shock cap allows quick and easy maintenance of the double O-ring seals.

Low-Profile Body - no less than ten versions of the new body for the RB5 were thoroughly tested to maximize performance and to ensure that you have the best-looking car on the track. The entire R&D team as well as the factory drivers were involved in the development, and the finished product is the best-performing body ever used on a 2WD buggy according to the team.

SPECIFICATIONS:

Category: 1:10 competition 2WD electric buggy

Wheelbase: 10.63 in. (270mm)

Track width: 9.84 in. (250mm)

Weight: 57.2 oz. (1620g)

Chassis: Molded carbon composite

Transmission: Compact 3-gear

Differential: Externally adjustable ball-type

Transmission ratio: 2.6:1

Slipper: Double-disc, spring-loaded

Bearings: Teflon-sealed (transmission); metal shielded

Suspension: Lower H-arm w/steel turnbuckles

Shocks: 3-piece threaded aluminum, oil-damped

Driveshafts: Steel CV-type

Gears: 48-pitch

30074B - Ultima RB5 Competition 2WD EP Buggy

kyosho_ultima_rb5.jpg

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kyosho_ultima_rb5_3.jpg

kyosho_ultima_rb5_4.jpg

kyosho_ultima_rb5_5.jpg

kyosho_ultima_rb5_6.jpg

Pics: RC Zone

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Une photo du mien

Un petit article du montage ainsi que du roulage??

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hébé!! le fidel parmis les fidels!!

Pas roulé encore??

moi, Kyosho c'est un cachet matin, midi, et soir :P

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Un petit article du montage ainsi que du roulage??

pas sur d'avoir le temps, chu en plein travaux. si je le fait je te dis quoi...

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OOP_5559.jpg

Vraiment beau ce nouveau Kysoho.

Je vais peut être bien me laisser tenter a nouveau par le 4x2 moi...

:)

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Alors qui roule avec le RB5 ?

La transmission de l'ancien Ultima RB Evo n'était pas terrible, est ce que c'est mieu sur le RB5 ?

Quelles sont vos impressions sur le nouveau 4x2 de Kysoho.

;)

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Suite a une L/R voici mon impression :

l'auto est tres saine. tres stable dans les trous, tres grosse motricité.

elle reagit tres bien au reglages (nombreux d'ailleurs).

l'huile d'amortos et la graisse de diff fournis sont a fuir. pas constant sur la durée.

de part sa motricité et sont parfait equilibre, les sauts se passent sans soucis.

un autre point elle est tres robuste, la visserie est du type btr.... bien mieux equipée que le lazer (de boite).

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Suite a une L/R voici mon impression :

l'auto est tres saine. tres stable dans les trous, tres grosse motricité.

elle reagit tres bien au reglages (nombreux d'ailleurs).

l'huile d'amortos et la graisse de diff fournis sont a fuir. pas constant sur la durée.

de part sa motricité et sont parfait equilibre, les sauts se passent sans soucis.

un autre point elle est tres robuste, la visserie est du type btr.... bien mieux equipée que le lazer (de boite).

Merci pour ce premier avis sur cette auto.

Surtout venant d'une personne qui connait bien les kyosho.

;)

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Si tu lis l'anglais, il y a un bel article sur Oople.

Oui merci je suis allé voir...

surtout que les article sur Oople sont toujours bien fait.

:)

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Salut à tous.

Alors les pocesseurs du RB5, que pensez vous de cette voiture??

Par rapport aux B4 et autres losi?? Performance, fiabilité??

@+Damien

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voilà ma nouvelle monture !!

mmlfb_imgp0558.jpg

demain essai de la voiture en configuration race je vous donnerais mes premières impressions

A + Arnaud

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Salut à tous.

Alors les pocesseurs du RB5, que pensez vous de cette voiture??

Par rapport aux B4 et autres losi?? Performance, fiabilité??

@+Damien

Bon après cette journée sous la pluie à maison alfort le constat est très positif la voiture marche super bien ,pas de casse sur la journée ,les amortisseurs ne fuit pas la voiture est très silencieuse ,elle saute bien à plat je suis vraiment confiant .

franchement ceux qui hésite il ne faut pas c'est une super caisse et à ceux prix là c'est donné

le résultat de la course est assez moyen puisque étant dans la première serie de qualif j'ai a chaque fois eu le droit à une piste glissante par rapport aux autres et je testais les pneus pour eux donc je partais 4 en final !

premiere et unique manche je crame un vario comme à montigny apès avoir eu pas mal de top radio sans commentaire

en deuxieme manche il y a beaucoup de probleme d'electronique pour tous ceux qui ont continué

la troisieme n'aura pas lieu

A bientôt

Arnaud

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