KTM X-Bow

[90ft]

The Engine: TFSI Technology from Audi

KTM was able to gain Audi AG as its partner in developing the drive unit. The four-cylinder TFSI engine represents the X-Bow’s construction principles in an ingenious way: by featuring lightweight, high-performance and intelligent technologies.
The engine’s outstanding attribute is its gasoline direct injection technology, FSI. In this case, it’s combined with an exhaust turbocharger plus an intercooler. Thanks to FSI, the engine can utilize fuel better than one with ordinary intake manifold injection and it even gets by on less fuel in the frequently used partial load range.
The injection takes place at a pressure level between 30 and 110 bar, valves in the intake system direct the inflowing air into a cylindrical movement. A continuously variable intake camshaft ensures optimal cylinder charging at any speed. Two balancer shafts compensate the second order inertia forces and so guarantee superior, low-vibration operation.
The KTM X-Bow’s long-stroking, four-valve engine delivers a powerful performance: 300 newton-metres of torque peaks at a level between 2200 and 4000 rpm. The peak performance of 162 kW (220 hp) is achieved at 5900 rpm. Even more powerful engine variations in the 300-horsepower range are planned at a later date.
The drive unit package is complemented by a manual 6-gear transmission, which is also made by VW and can be equipped with a limited-slip differential if so desired. An optional DSG transmission will also be offered. The drive comes from the rear wheels.


The Chassis: Direct and Competent

The X-Bow’s driving dynamics profit not only from the car’s low centre of gravity but also from its superior chassis, which also draws on racing technology for its basic principles. Suspended on double triangular wishbone axles, the wheels feature suspension and damping elements by WP Suspension, with a pushrod arrangement up front.
The Italian brake manufacturer Brembo can also be proud of its reputation for excellence. KTM is also expanding this partnership (which began in the motorcycle sector) into the automobile realm. The X-Bow’s powerful braking system consists of 305 mm discs at the front and 262 mm discs at the rear. The interaction of the vehicle’s light weight, ideal balance, low centre of gravity and a 17-/18-inch tyre mix results in spectacular braking performance: when the brakes are warm, the KTM X-Bow needs only 33.1 metres to decelerate from 100 kph to a standstill.


The Aerodynamics: Exceptional Contact Pressure

The primary development goal for the KTM X-Bow was not attaining extreme final velocities, but in optimising the driving dynamics. The sports car is thereby aided by an ingenious aerodynamics arrangement, the result of many hours in Dallara’s wind tunnel. The most vital element in this area is the underbody, which is equipped with a prominent diffusor at the rear. To make this diffusor work even more effectively, the linking points for the rear suspension were set as high as possible. This enables the KTM X-Bow to achieve a phenomenal downforce of about 200 kilograms at a speed of 200 km/h – about three times more than most other supersport cars.
In combination with the high-performance chassis, this fantastic downforce makes extreme curve speeds possible. The transversal acceleration of 1.23 g that can thus be attained noticeably surpasses the usual values achieved by street homologated sports cars.
The aerodynamic concept was a great challenge for the designer as well. It meant that sufficient air had to be channelled into the inlets located in the sides, behind the passengers. The radiator is also located at the rear of the vehicle, to avoid having to install longer, heavier cooling hoses. This mission was accomplished by using special air baffles, which are installed horizontally on the sides of the car so the passengers can also use them as boarding aids.


Safety: Racing Technology

The crucial component protecting the driver and the passenger is the solid, carbon fibre monocoque – safety technology straight from Formula 1. This structure is supplemented by a crashbox in the nose of the vehicle. The silencer, which is built into the rear of the car, was also designed to act as a crashbox; it absorbs the force of an impact to the rear of the vehicle.
The driver and passenger are also protected by four-point safety belts, which were inspired by the racing world. If so desired, this unit can be equipped with a fifth securing point. The two roll bars are clearly visible. They not only appear to be solid, they are skilfully integrated into the monocoque’s structure.

[90ft]

Design: Floating Elements

Gerald Kiska’s design studio can take credit for the shape of the vehicle. Coming from Salzburg, he has worked closely with KTM for the past 15 years and is entrusted not only with the design of the motorcycles, but also with the appearance of the company itself.
For the concept of the KTM brand’s first automobile, Kiska incorporated many characteristics that are more closely associated with motorcycles than cars. Every part fulfils a function, the technology remains transparent, the form is noticeably simple. The few, orange-coloured body panels are “floating elements”, like those of motorcycles, and suggest lightness and simplicity.
The deliberate reduction in all things even includes the lights: simple headlamps, embedded indicators flush with the car’s contours and round lights at the rear forego superficial, showy effects. Instead, the carbon structure also takes on design duties, meaning that components which are frequently hidden in cars, such as the silencer, suddenly serve an aesthetic purpose in addition to their usual functions.


The Equipment: Puristic and Functional

As a result of its clear concept, the KTM X-Bow can do without a lot of elements that ordinarily add complexity and extra weight. So the narrow wind deflector makes an elaborate heating system and windscreen wipers unnecessary; doors are also not included in the design, due to the vehicle’s low profile and the extra-low side profile.
You’ll also look for a standard instrument panel in vain. The driver can find all the information needed for driving on the hub of the steering wheel.
The seats are further examples of the X-Bow’s intelligent and simple construction: the shells for the driver’s and passenger’s seats are already integrated into the carbon fibre construction of the monocoque. An overlay provides solid comfort. In order to provide the best ergonomics for drivers of various heights, the X-Bow has manually adjustable pedals.
The KTM X-Bow doesn’t have a luggage compartment. But it does feature an innovative, mobile storage box for the car documents. The equipment required by law, such as the warning triangle, first aid kit and a tyre-fit system, are kept in storage compartments beside the passenger’s foot well. A cover is stowed in this same location; it protects the interior of the car when it’s parked. Two helmets can be fixed in the passenger’s legroom.

[90ft]

Extras: for the Automobile and the Driver

Supplementary equipment – like kits to increase the engine’s performance or an aerodynamics package – give the sporty potential of the KTM X-Bow an even greater boost.
Another segment of the accessories programme aims in the opposite direction: together with Dainese, the renowned Italian specialist for motorcycle apparel, a new line of clothing and helmets is being developed especially for the KTM X-Bow. These intelligent components are designed to assume functions that are normally performed by the car: weather protection, climate control and – thanks to integrated technology – even infotainment functions such as sound and mobile telephony.

[90ft]

The Next Steps: Premiere in Geneva,
Building a Pilot Series of 100 Units

A prototype of the KTM X-Bow will make its first public appearance at the Geneva Motor Show. This prototype is also the basis for a pilot series of 100 units, which will be produced in Dallara’s factory beginning at the end of 2007. The limited series is a result of the Italian company’s manufacturing capacity: four to five vehicles can be built per week, with a large share of the work being done by hand.
Due to the special status of this pilot series, KTM has decided to equip all the vehicles of this initial production with a number of first-rate accoutrements, which will later be offered as extras. Included in the standard equipment for the first series are the limited-slip differential, lightweight metal rims with a central nut mounting, and a Formula One racing steering wheel that can be removed via a quick-release mechanism to simplify getting in and out of the car. The four body panels – lacquered orange on the prototypes – are made of carbon fibre in the pilot series (later they’ll be made of synthetic material), and the chassis’s damping elements are adjustable. And of course other individual equipment requests can also be fulfilled.
Because of the greater extent of the equipment range, the projected basic price of 40,000 Euros (incl. VAT) is naturally higher for an exemplar of this pilot series. A definitive price will be announced after the Geneva Motor Show. After the publication of the first drawings, the interest in the pilot series prototypes was overwhelming. Every spot on the list of prospective buyers was already filled in January, while the waiting list has got considerably longer.
The KTM X-Bow will be street homologated in accordance with European small series homologation regulations. But since the respective guidelines are defined differently throughout the EU, KTM currently anticipates standardising the X-Bow in the following countries: Germany, Finland, Greece, Great Britain, the Netherlands, Austria, Portugal and Switzerland.


The Vision: Producing a Small Series Beginning in 2008

Depending upon the reactions to the vehicle presentation in Geneva, KTM is considering extending the pilot series of the X-Bow into small-series production. This small-series production would take place in Austria beginning in 2008 and entail an annual production of between 500 and 1000 vehicles. Parallel to this small-series production, an efficient distribution structure would also be established. The plan includes a network of around 15 to 20 partners throughout Europe, who not only have experience in motorsports, but also a connection to the Volkswagen enterprise.
A decision will be made concerning the small-series production of the KTM X-Bow by the end of April 2007.

[90ft]

TECHNICAL SPECIFICATION
KTM X-BOW

Engine Inline-4-cylinder-engine with direct fuel injection system (FSI), turbo-charger and intercooler
Displacement cm3 1984
Max. Power kW (HP) 162 (220)
@ U/min 5900
Max. Torque Nm 300
@ U/min 2200–4000
Valves 4 pro Zylinder, DOHC
Bore & stroke mm 82,5 x 92,8
Emission standard Euro 4
Transmission Rear-wheel-drive with mechanical slip differential
Gearbox 6-speed-manual

Kerb weight kg 700
Weight distribution front/rear % 37/63
Overall length/width/height mm 3670 x 1870 x 1160
Wheelbase mm 2430
Center of gravity mm 400
Track front/rear mm 1644/1624
Turning circle m 10,8
Fuel tank capacity l 35

Brake system front.: 4-piston-caliper
rear.: 2-piston-caliper

Brake-disk diameter front/rear mm 305/262

Wheels/tyres front: 205/40 R17
rear: 235/40 R18

Acceleration 0–100 kph s 3,91
Topspeed kph 217
Braking distance 100–0 kph (warm) m 33,1

Aerodynamic downforce kg
at 100 kph 48
at 200 kph 193

[Coventrysucks]

But with all this attention to making it look good, they must have added lots of weight. All these body panels floating around look too much for an uncompromising sports car.

I can't imagine that the body panels comprise more than a few percent of the total weight, and considering that they also contribute to the aerodynamic performance - that additional mass is justified.

[Ferrer]

I reckon it looks quite ugly...

[90ft]

It costs to much and it weighs to much.
If it is meant to be an Ariel Atom beater then it should look at their car as a comparison.
the Ariel Atom weighs 456 kgs.
This bucket - even though it is made from a carbon monocoque weighs . . 700kgs.
What's in the back?
Lead weights?

[Jack_Bauer]

Personally I really like it. Sure it's not 'beautiful' in the classical sense, but it's bold and super-aggressive which I think suits the character of the car to a tee.

It costs to much and it weighs to much.
If it is meant to be an Ariel Atom beater then it should look at their car as a comparison.
the Ariel Atom weighs 456 kgs.
This bucket - even though it is made from a carbon monocoque weighs . . 700kgs.
What's in the back?
Lead weights?

With regards the weight it does seem a tad on the heavy side, but then I think it is a little bit larger than some of its rivals and it's still not exactly what you would call heavy. Also, the Atom claims a 456kg weight, but when EVO put it on their scales it came out at 584kg, a fairly hefty difference. Also, I don't know the exact figures but I guess the Audi drivetrain with all the plumbing for the turbo and intercooler etc will weigh a fair a bit more than the Vtec in the back of the Atom.

The big advantage this car will have over the likes of the Atom, Caterham CSR, Brooke Double R etc is the aerodynamics. IF the downforce claims are remotely accurate then they are pretty darned impressive. Caterhams are notorious for getting a bit vague and understeery when cornering at > 100mph (even the new CSR), and Atoms certainly aren't reknowned for their aerodynamic efficiency. If it can really produce close to 200kg negative lift at 200km/h then that will give it a big advantage over its rivals and certainly help to offset the extra weight it's carrying.

Obviously the real acid test will be the handling of the car. From what I can gather Dallara are pretty much in control of the dynamic development of the car, and they certainly know a thing or two about making things go bloody fast around a track. Theoretically the development should be in good hands so I have high hopes for this car. Hope it doesn't disappoint...

[dydzi]

I reckon it looks quite ugly...

i'm on the opposite imo its presence is very interesting, i like that kind of design

a very good debut for KTM

[Sledgehammer]

Specs:
Engine = 2 liter TFSI inline-4
Weight = 1742 lbs
Aspiration = turbocharger & intercooler
Torque = 229 lb-ft
HP = 240 hp
HP/Weight = 7.3 lbs per hp
HP/Liter = 120 hp per liter
0-62 mph = 3.9 seconds


KTM X-Bow #7

[Sledgehammer]

(from KTM Press Release)

2008 KTM X-Bow

Exhibited at Geneva in limited-edition ‘KTM X-Bow Dallara’ form

Aggression and purity of original concept retained

Carbon fibre monocoque is unique feature

240 bhp 2-litre Audi TFSI engine for spectacular performance

True open car driving experience without roof or windshield

Start of production set for mid-2008

The KTM X-Bow: A Success Story

The motorcycle specialist manufacturer KTM celebrated the world premiere of its first-ever car at the Geneva Motor Show in 2007 when the X-Bow was born. The company sounded out the exclusive lightweight sports car market with an aggressive design and a spectacular concept, complete with carbon fibre monocoque and purist, minimalist fittings.

Following an overwhelmingly positive response from sports car enthusiasts and motoring media all around the world, the decision was made to go ahead with further development for the series production model of the KTM X-Bow.

Now, on the anniversary of that world premiere, KTM exhibits the results of the continued development, showing the production-ready version of the KTM X-Bow for the first time and in the exclusive form of the ‘X-Bow Dallara’ which will be a limited-edition of just 100 units.

It says a lot about the dedication of the KTM engineers and testifies that the concept was so ‘right’, that the series production model unveiled at Geneva stage looks so similar to the original car. The original character of the KTM X-Bow is not watered down with only a few concessions to meet technical, legal and practical requirements. The central inlet to the air box is higher and larger and alterations to the instrument panel are the most noticeable changes.

The original spirit of the KTM X-Bow is retained and it is still ‘ready to race’. The first series production vehicles for customers will be seen on the road in the late summer of 2008.

Puristic and Avant-garde: The Concept

The most outstanding technical feature of the KTM X-Bow is its carbon fibre monocoque. This avant-garde material and construction technique has been highly developed for use in Formula 1, racing cars and expensive exotic sports cars for the road. Its use by KTM places the X-Box in a privileged position among a small, but elite group of puristic lightweight sports cars.

This monocoque, which is manufactured by the specialist Wethje in Southern Germany, incorporates a crash box at the front and a solid sandwich structured floorpan and creates a structure that delivers safety without compromise. At the same time the sophisticated carbon fibre material is also the key to the vehicle’s status as a lightweight sports car. The KTM X-Bow weighs just 790 kilos.

The monocoque was developed together with the Italian racing and sports car specialist Dallara (in whose honour the first 100 limited-edition cars are named). The Italian company also assisted with the development and tuning of the chassis, which will be offered in two configurations. In the series production model, the chassis comes with a double wishbone and push rod suspension at the front.

As an optional extra, KTM can supply the X-Bow with a motor racing chassis, which features altered suspension geometry and settings and is also fitted with a pre-load adjuster so that the clearance of the vehicle can be varied. On this chassis version, the shock absorber elements from WP are adjustable in both rebound- and compression damping.

The production KTM X-Bow is powered by a lightweight, compact, high performance, high efficiency 2-litre Audi TFSI engine that is the perfect complement to the car’s character. In contrast to the original concept the Audi engine now boasts a 177 kW (240 bhp) output, with maximum torque of 310 Nm. The KTM comes with a six-speed manual transmission with close-set ratios. Thanks to its low weight the KTM X-Bow can exceed the performance of many supercars that are twice as powerful. It can accelerate to 100 kph in just 3.9 seconds. The fuel consumption has been set at a preliminary value of approx. 7,5 liter at 100km.

With its puristic concept, supercar performance, immensely capable chassis and aerodynamics that have been purposefully tuned to generate downforce, the KTM X-Bow is the perfect car for the racing circuit – as well as the road.

The KTM X-Bow, with its advanced technology and radical technical solutions is directed at enthusiasts who are seeking a genuine, unfiltered driving experience.

To ensure that it is a road-legal car, KTM has already certified the X-Bow for use in most European countries. With the general ratification of the new ‘European Small Series Homologation’ regulations scheduled for first quarter of 2009, the road-legal status will be extended to include all the countries of the European Union. Further export markets are constantly being examined.

Concept and Series: The difference is in the detail

Because weight kills performance and mars the driving experience many traditional comfort and convenience features were not present in the original KTM X-Bow concept car. Radical construction without a roof or conventional windshield, and doing without air-conditioning and an entertainment system, allow a sharp focus to be kept on delivering the kind of driving experience that can usually be found only on a motorcycle.

Now, KTM has not wavered from its original goals and only very small modifications differentiate the prototype exhibited at the Geneva show in 2007 from the production model exhibited in 2008.

The most obvious change is the enlargement of the central air intake between the headrests to ensure adequate cooling for the engine compartment during demanding track-day activities.

The new arrangement of the instruments is a more marked change. Originally KTM had positioned all indicator and control elements and a display on the steering wheel. However comprehensive testing showed that the readability of the display on the steering wheel was not ideal. So, it was decided to create a display with the most important information at the top of the centre console – the instruments echoing the style of those recently presented on the new KTM RC8 superbike. This compact, lightweight instrument panel is shower- proof and in the best racing tradition, the control buttons themselves remain on the sports steering wheel.

Also new are the side windows, the even smaller windshield (now made from polycarbonate) and the new seating upholstery, which has been conceived and made by a renowned specialist. Because the seat shells are made of carbon and rigidly fixed to the monocoque the cushioning is available in a variety of sizes to suit drivers of different statures. A mechanically adjustable pedal box ensures that drivers can set-up a comfortable driving position with perfect ergonomics.

At the rear of the KTM X-Bow, the silencer now comes with two exhaust pipes which allow finer tuning of the exhaust sound for a more sporty sound.

KTM X-Bow #8

[Sledgehammer]

The KTM X-Bow Dallara: the limited-edition beauty

At Geneva, KTM exhibits the series production X-Bow in its most elite form – the special limited-edition X-Bow Dallara model. KTM will celebrate the start of production in the middle of 2008 by producing just 100 examples of this version. These future collectors’ models have been sold out for more than a year.

The fascinating X-Bow Dallara differs strongly both optically and technically from the production model that follows because it incorporates ‘as standard’ most of the factory-fitted options which will be offered on lesser versions.

For example, the bodywork comes in carbon (rather than plastic), the wheels have a quick release/quick locking mechanism, the racing chassis comes with adjustable suspension and the steering wheel is removable. A mechanical limited slip differential improves traction and stabilises the vehicle during extreme manoeuvres. Cosmetic design, aerodynamic, performance parts and wheel mudguards also feature carbon finish. Special graphics are maintained in this special series, a metal plaque in the interior presents the serial number of the automotive work of art.

The Extras: for the Automobile and the Driver

For those X-Bow enthusiasts who weren’t lucky enough to be among the first 100 ‘Dallara-series’ customers, the standard production model KTM X-Bow is available with the choice of many of the optional extras found on the limited Dallara edition. Aside from the special graphics and Dallara plaque, it is possible to order all other extras from the Dallara series model for the production car.

KTM’s recently-launched ‘Car Configurator’ system allows prospective buyers to view and specify the full range of extra equipment for their vehicle. Accessible through the KTM X-Bow website, at KTM X-BOW - KTM X-BOW - The first car from KTM, the easy-to-use software gives a clear breakdown of the options available.

While European authorities permit driving the X-Bow without a helmet, KTM strongly recommends wearing a helmet and will present two options – developed exclusively for X-Bow – at the Geneva Show. The Arai closed racing helmet provides comprehensive protection and meets the requirements of the motor sports authorities. An open face helmet, manufactured by German company Schuberth is also offered to give better peripheral vision when driving X-Bow on the road. Both helmets carry X-Bow branding and will be available when the series production models go onto the market. A range of clothing and technical accessories for the driver are also in development.

Production and Aftersales: slim and efficient

Following the hugely positive response to the introduction of X-Bow and growing demand for KTM’s new quad bikes, which have recently been introduced in the USA, KTM has decided that production of X-Bow will not be outsourced, as originally anticipated. Instead, KTM has established a new assembly facility specifically for the production of its four-wheel products, near Graz in Austria.

The manufacture of the KTM X-Bow will create around new 50 jobs, as KTM produces 500 units in 2008, before the production expands to a maximum capacity of 1000 units annually, when the facility is fully operational.

KTM is in the process of finalising its network of specialist service partners to meet the aftersales requirements the X-Bow customers. When all agreements have been finalised, KTM plans to have a Europe-wide network of approximately 50 X-Bow service centres.

Delivery of cars is organised through the company headquarters in Mattighofen. Customers will be given the option of collecting their vehicle at their nearest service centre – or to have their new KTM X-Bow personally delivered to their door.

The Next Step: Visions for Tomorrow

While making the final preparations for the start of series production and the expansion of the service network, KTM is also planning to introduce the X-Bow onto the racing circuit. A racing model for this purpose is in development and the X-Bow will make its first public appearance on the race circuit during 2008. In the longer-term, KTM is considering the organization of a one-make series competition for X-Bow.

There are also further updates planned for the X-Bow itself in the future. A race-engineered version, which will increase power into the region of 300 bhp, is expected at a later date. The car will also be offered with an optional S tronic sequential double clutch semi-automatic gearbox.

The KTM X-Bow: highlights in detail

Carbon Fibre Monocoque: Racing Equipment for the Road

Carbon fibre monocoques have been Formula 1’s safety net for many years. On the road, this technology has always been reserved for the elite supercars in the highest price ranges. KTM is proud to be the first company to offer this chassis technology in a much more affordable form, and has called upon the expertise of its development partners for this project, Dallara, and carbon fibre specialists Wethje Group, to make X-Bow a reality.

The Italian specialist from Varano Melegari, near Parma, Dallara has long been acclaimed as a carbon technology expert from the conception and design through to the production of components made of this light, yet rigid material. Dallara currently supplies the monocoque race-car chassis for international formula such as GP2, Indy Car (IRL) and Formula 3.

KTM has also been able to utilise the expertise of Wethje Group to manufacture the carbon fibre monocoque for the X-Bow. Widely considered as one of the most experienced specialists for carbon composite construction components, Wethje is a successful supplier to premium segment car manufacturers, as well as to Formula 1 and touring car teams.

The monocoque developed for the KTM X-Bow is not only extremely robust, it is also safe, thanks to an integrated crashbox in the nose, and yet it weighs only 75 kilos. This low weight is a crucial factor in ensuring the vehicle’s spectacular performance.

The Engine: TFSI Technology from Audi

To power the X-Bow, KTM was delighted to form a partnership with Audi AG for developing the drive unit. Audi’s 2.0-litre four-cylinder TFSI engine reflects the X-Bow’s construction principles by featuring lightweight, high-performance and intelligent technologies.

The engine’s outstanding attribute is its gasoline direct injection technology, FSI. For its KTM X-Bow application, the engine also boasts an exhaust turbocharger plus an intercooler. Thanks to FSI technology, this engine utilizes fuel more efficiently than one with ordinary intake manifold injection and it even consumes less fuel in the frequently used partial load range.

With FSI technology, the fuel injection takes place at a pressure level between 30 and 110 bar. Valves in the intake system direct the inflowing air into a cylindrical movement, and a continuously variable intake camshaft ensures optimal cylinder charging at any engine speed. Two counter-rotating balancer shafts compensate the second order inertia forces and so guarantee superior, low-vibration operation.

The KTM X-Bow’s long-stroke, four-valves per cylinder Audi engine delivers powerful performance with 310 Nm of torque between 2000 and 5000 rpm, while peak power (177 kW / 240 bhp) is achieved at 5500 rpm. Even more powerful engine variations in the 300-horsepower range are planned for the X-Bow in the future.

The transversely-mounted engine and drive train package is complemented by a VW-sourced six-speed manual transmission as standard. Drive goes to the rear wheels via an optional mechanical limited-slip differential. An optional S-tronic semi-automatic transmission will also be offered at a later date.

KTM X-Bow #9

[Sledgehammer]

The Chassis: Direct and Competent

The X-Bow’s driving dynamics benefit from the car’s low centre of gravity, the sporty bias to its front/rear weight distribution and its superior chassis, which draws on racing technology for its basic principles. The relatively long wheelbase (2430 mm) and wide track (1644 mm front, 1624 mm rear) provide the foundations for a comfortable ride and excellent stability.

Employing double wishbones, front and rear, the suspension features components and damping elements by WP Suspension, with a pushrod arrangement up front. Available with a choice of ‘Sport’ or ‘Racing’ set-up, the chassis can be biased for road or track use respectively. While both options can be adjusted for traction and pressure settings, the Dallara-designed ‘Racing’ configuration is fitted with a pre-load adjuster for adjustment of the vehicle’s ground clearance.

KTM is also expanding its partnership with the famous Italian brake manufacturer Brembo into the world of automobiles. The X-Bow’s immensely powerful braking system consists of 305 mm ventilated discs with 4-piston fixed callipers at the front and 262 mm solid discs with 2-piston fixed callipers at the rear. The combination of the vehicle’s light weight, ideal balance, low centre of gravity and high-performance Continental tyres – 205/40 R17 front and 235/40 R18 rear – results in spectacular braking performance. When the brakes are warm, the KTM X-Bow needs only 33.1 metres to decelerate from 100 kph to a standstill.

The Aerodynamics: Exceptional Contact Pressure

The primary development goal for the KTM X-Bow was not attaining extremely high top speeds, but in optimising its driving dynamics. The sports car’s performance is aided by an ingenious aerodynamics arrangement – the result of many hours work in Dallara’s wind tunnel. The most important aero element is the underbody, which is equipped with a prominent diffusor at the rear. To make this diffusor work even more effectively, the mounting points for the rear suspension were set as high as possible. This enables the KTM X-Bow to achieve a phenomenal downforce of almost 50 kg at 100 km/h and nearly 200 kg at a speed of 200 km/h – approximately three times more than most other supercars.

The high-performance chassis plus this fantastic level of downforce makes extreme cornering speeds possible. The X-Bow can generate a lateral acceleration of 1.5 g. These g-forces and cornering speeds comfortably surpass the values achieved by most street-legal sports cars.

The aerodynamic concept posed a great challenge for the designers. They had to ensure that sufficient engine-cooling air could be channelled into the inlets located in the sides of the vehicle, behind the passengers, while not upsetting the aero-balance or the generation of downforce. This challenge was accomplished by using special air baffles, which are installed horizontally on the sides of the car so that the driver and passenger can also use them as boarding aids. The radiator is also located at the rear of the vehicle, to avoid having to install longer, heavier water hoses.

Safety: Racing Technology

The crucial component protecting the driver and the passenger is the rigid, carbon fibre monocoque – safety technology straight from the world of professional motor racing. This structure is supplemented by a crashbox in the nose of the vehicle, which fulfils stringent FIA Formula 3 safety requirements. At the rear of the car, the exhaust silencer is also designed to act as a crashbox; absorbing the force of an impact to the rear of the vehicle.

The driver and passenger are protected by four-point safety belts, which can be equipped with a fifth securing point (a crutch strap) as an option. Twin roll bars are a distinctive feature of the X-Bow’s striking appearance. They not only look solid, they are skilfully integrated into the monocoque’s structure to offer the highest level of safety.

Design: Floating Elements

Gerald Kiska’s design studio can take credit for the shape of the X-Bow. Coming from Salzburg, Kiska has worked closely with KTM for the past 15 years and has been entrusted not only with the design of the motorcycles, but also with the appearance of the company itself.

For the concept of KTM’s first automobile, Kiska incorporated many characteristics that are more closely associated with motorcycles than cars. Every part of the 3.67-metre long X-Bow fulfils a function, the technology remains transparent, the form is noticeably simple. The few, orange-coloured body panels are ‘floating elements’, like those of motorcycles, and suggest lightness and simplicity.

The deliberate minimalism is applied to all things, even the lights: simple headlamps, embedded indicators flush with the car’s contours and round lights at the rear, avoid superficial, showy effects. Instead, the functional carbon structure also takes on design duties, meaning that components which are frequently hidden in cars, such as the silencer, suddenly serve an aesthetic purpose in addition to their usual functions.

The Equipment: Pure and Functional

As a result of its strong, clear concept, the KTM X-Bow can do without a lot of elements that ordinarily add complexity and extra weight to cars. For example, the narrow wind deflector makes an elaborate heating system and windscreen wipers unnecessary; doors are also not included in the design, due to the vehicle’s low profile and the extra-low side profile which makes for easy access.

Drivers will also search in vain for a standard instrument panel. All the information needed for driving is presented in the multi-functional display on the steering wheel.

The seats are further examples of the X-Bow’s intelligent and simple construction. The shells for the driver’s and passenger’s seats are already integrated into the carbon fibre construction of the monocoque, in a fixed position. An overlay provides firm support and comfort. In order to provide the best ergonomics for drivers of various heights, the X-Bow has manually adjustable pedals.

The KTM X-Bow doesn’t have a luggage compartment, but instead features an innovative, mobile storage box for the car documents. The equipment required by law, such as a warning triangle, first aid kit and a tyre-repair system, are carried in storage compartments beside the passenger’s foot well. A cover to protect the interior of the car when parked is stowed in the same location. Two helmets can be fixed in the passenger’s foot well.

.....

[Sledgehammer]

(from KTM Press Release)

Two KTM X-Bow cars, run by German racing specialists Reiter Engineering, score class wins in the new GT4 Sports Light series

Both cars finish ahead of immensely more powerful opposition in the GT4 European Cup

Excellent results of the KTM X-Bow car’s first competitive racing appearance are an emphatic confirmation of the concept behind KTM’s sportscar

Last weekend, the KTM X-Bow celebrated its racing debut in the GT4 European Cup at Silverstone Circuit in the UK. The car’s performance exceeded all expectations, claiming two class victories and excellent overall placings.

Both cars, which are run by the German team Reiter Engineering, completed practice, qualifying and two races without any technical problems – confirming that the KTM X-Bow really is ‘Ready to Race’. Entry into the GT4 racing series has been used as the last acid test for the car, shortly before the series production begins this Summer.

The performance of the KTM X-Bow on the track surprised even the most optimistic among the Reiter team, with the cars finishing ahead of more established, and more powerful opposition. This was despite running on treaded tyres, with added ballast and an increased ride height, at the instruction of GT4 race officials to equalise the performance of the field.

Though the KTM X-Bow is strictly only competing against rival vehicles in the new ‘Sports Light’ category of GT4, the X-Bow raced alongside cars in the 400-HP-category. Other cars in the GT4 series include the Aston Martin N24, Ford Mustang and Chevrolet Corvette.

Among a starting field of 16 high-performance racecars, the KTM X-Bow finished seventh and eleventh overall in the first race, and fifth and sixth in the second race.

The amazing results demonstrate the perfect concept and the awesome performance of the ‘Ready to Race’ KTM X-Bow. KTM is looking forward to the next round of the GT4 European Cup, which will take place on 16-18 May at Monza, Italy.

KTM X-Bow #10