Sparta (EN) - Hartung Helmets

Hartung Helmets
Idea, Research & Development, Production
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Hartung  SPARTA NATURE  HYBRID 4x4, Monocoque in High Grade Stainless, Aluminium or Titanium

Duramax V8 Diesel SCR AdBlue also for urban traffic, "probably the most powerful car in the world", see press articles under Google :  IAA 2005+2009, TopMarquesMonaco 2008+ 2010, Goodwood 2010
HYBRID 4x4 for urban traffic and offroad with until 4 electric motors up from 300 Nm
On request Micro Turbine Range Extender also for direct drive at higher speeds
Adjustable Economy Level* up from 5 l/100 km, possible range up to 1500 km
On request with vegetable- or algae-oil mostly CO2 neutral with lowest fire risk                                                                   
Since 1973 first 3-seater with central driving position in a safety cell with 4 roll bars
Mid-engine touring- and off-road supercar with air suspension, spacious long-term vehicle
ASC** see below, on request Active Suspension & Damper Control ASDC** "Skyhook"

Body, Weight

Supercars were built to achieve better road holding with a lower center of gravity and larger track widths, therefore flatter and some up to 2 m wide, on the other hand the most sporty design with mid-engine practically does not allow 2 rows of seats. So since the beginning of our development 1973 we planned 3 comfortable seats in a spacious interior with 2 strong tilting up armrests (for perfect lateral support while cornering) for easy driver access to the middle of the bench (possible to lay down), adjustable pedals and 4-point safety belts (on request 6-point-, airbags), and additionally comfortable air suspension for touring and a large trunk.
Targa-like with oversized roll cage : 2 pneumatically opening gull wings, easy to remove and to store at the rear, like a sunroof on request.
Curb weight up from ~1400 kg with petrol engine, up from ~1600 kg with diesel engine, + 500 kg payload

Engine Data, Engine Architecture

GM Duramax V8 mid-engine mounted transversely behind the safety cell, with California emission standards approval, turbo diesel with one external intercooler and large electric fan on each rear side, on request dry sump lubrication and aluminium billet block, up from 6,6 l  445 - 550 HP / 1234 - 1424 Nm with standard consumption in mix <10 l / 100 km, on request adjustable Economy-Level* with consumption up from 5 l / 100 km* (possible engine life 500.000 km), up to on request 1000 HP / >2000 Nm with 100.000 miles warranty (additional charge ~100.000.--), or >2000 HP for racing
On request mostly CO2-neutral by biofuels (e.g. jatropha-, algae oil) with dual-tank system
Front wheel drive with 2 electric motors up from 300 Nm / each motor
Water cooler in front with 2 large electric fans, batteries, emergency wheel; air compressor and -tank; on request compressor with A/C (weight !), engine-independent heating system, vacuum pump, etc.
On request 7 l V8 1000 HP / 1288 Nm Dodge 426 Hemi Hellephant-, Corvette- or Mustang-engines
On request instead of Duramax Turbine Range Extender (MTRE) to charge the batteries and for direct drive at higher speeds, whose development has to be followed especially concerning efficiency and weight.

Power Transmission 4x4, combustion engine for rear wheels, 2 electric motors for front wheels

2-speed Dual Clutch & (dual) Torque Converter Transmission behind the engine with steering wheel- or joystick-gearshift by PLC, on request fully automated, on request 4-speed DCTCT with 1st gear low for off-road, 4th gear OD for low consumption on highways
Limited slip differential (LSD) for rear wheels, on request 100 % lockable;  compact <100 mm wide brake disc- electric motor units via cardan shafts for front wheels  

Chassis, Body, Suspension, Steering, Brakes, Wheels

Oversized dimensioned monocoque safety cell bent from a ~3200 x ~2100 x 2 mm high-grade-stainless-steel- or on request 5 mm aluminium- or 2,5 mm titanium-sheet, welded to high side box framework (flank protection), oversized dimensioned tubular framework front and rear in combination with 4 steel (FIA), stainless or titanium roll bars (2 lengthwise in a trapeze from front bottom to rear bottom, 2 crosswise)
At the end of the 70th, because of various in practice successfully concluded framework studies, we decided to develop a polyvalent vehicle concept combining by height-adjustable air suspension supercar characteristics with those of an off-road- and touring-car. Aerodynamically optimized front and rear body with more front downforce and trunk hood in "van" shape with (air intake hood scoop at the front and) spoiler at the rear are laminated out of Zylon/carbon visible fabric composite.
Front axle : double triangular wishbones without camber adjustment**, with air suspension damper units
Rear axle : triangular semi-trailing arms** with air suspension damper units
Front and rear adjustable in height by Active Suspension Control ASC** for slight cornering similar to motorcycles for tyre-ideal camber angle** of all 4 wheels, on request counteraction during braking and acceleration, on request spring rate and damping adjustable up to Active Suspension & Damper Control ASDC** "Skyhook” (optical analysis of the road in front of the vehicle)
Power steering, safety-column and -steering wheel (on request adjustable)
For minimum unsprung masses 4 inboard 380 mm disc brakes with 8-piston aluminium calipers (total hydraulic area up to 400 cm²), cast discs for wet (off-) road; on request strap-drive-discs, carbon-ceramic discs, ABS or adjustable master cylinder balance, inline servo; hand-brake calipers (on request with electric actuator); 'perhaps the most powerful braking system'  
Front axle e.g. BFGoodrich g-Force Comp-2 A/S (all season) 235/55 ZR 17, rear axle e.g. g-Force Rival S 335/30 ZR 18, on our unique axial fan aluminium rims for outwardly directed extraction of up to >1 m3/sec. per rim of hot air from the brake and engine area, and for progressive negative pressure below the vehicle (additional downforce, see above), e.g. front 7,5", rear 12"


Wheelbase >=2650, front track ~1850, rear ~1750, adjustable ground clearance ~150 to 300 mm :  height up from ~1250, length ~4000, width ~2100 mm
Batteries in side-box framework, on request ~80 l fuel safety bladder with foam filling Luggage compartments in passenger area and rear total ~500 l

Road Performance

Speed limit 300 km/h (offroad-/all season tyre compromise see above), acceleration 0-200 km/h ~10 sec., wheelie bars; lower top speed possible with MTRE (see above)
Since top speed was already limited almost everywhere in the world in 1973, the objective of our vehicle development has always been to achieve (with reliable US series engines, on request tuned) best acceleration values in hypercar level by using high-torque turbo diesel engines :  The ratio of torque (1234 - 1424 Nm + ~600 Nm) to curb weight (~1600 kg, RTW >1:1) stands (also fully loaded) out of competition even to hypercars with top speeds of >=400 km/h.
The joy of driving shouldn’t be achieved by high speed but by agility and safety.

Exclusive Overall Concept of Chassis, Body and axle design, AS(D)C**, DCTCT

Weight reduction through monocoque / trapezoid tubular framework construction (only possible by central driver's seat position) despite oversizing even for tough off-road use, low center of gravity; largely stainless robust long-term capital good, easy to maintain and to repair; on customer request handmade under rigorous control during at least 8000 hours of highly qualified craftsmanship 'as in old style'.
Optimized downforce by body modifications (aerodynamics) and rims (see above)
By cornering similar to motorcycles for tyre-ideal camber angle (ASC**) and lowest possible unsprung masses incomparable road holding and driving comfort
The transverse engine with high masses 'turns' the vehicle forwards when accelerating and backwards when braking, i.e. does not have a negative effect in extreme cornering.
For the first time DCT with all advantages of torque converters (DCTCT) :
Comfortable seamless gear shifting possible, until shifting with torque shock without increased wear of clutch linings, higher acceleration values possible than with DCT
LED highbeam in the roof for ~1 km, LED daylight, lowbeam, fog-, cornering- and flashing light
Complete instrumentation, on request also via displays
On request cool box, ESP, DampTronic Sky** shock absorber, etc.
Spacious AllTracks Gran Turismo for 3 even tall passengers and 500 l of luggage with air suspension programmable by PLC (on request damping**, too) for highway, country road, adjustable in height to all terrain characteristics 'à la Paris-Dakar', comfortable (for the spine), reliable and inexpensive also for a daily short haul (e.g. to work, for shopping)
The responsible 'purist' of such an extraordinary vehicle enjoys his freedom and highest primary (through best road holding, best brakes, best acceleration) and secondary safety (safety cell; lowest fire risk by biofuels, low by diesel oil, on request protected in fuel safety bladders), and likes to be overtaken ‘relaxed’.
Base price up from € 285.000.-- net, special versions and extras by personal advice

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