Arrinera tests with Lee Noble

Θυμάσαι το Arrinera Hussarya, το πολωνικό supercar; Υπήρξε μια περίοδος που δεν διαβάσαμε νέα του, αλλά η εταιρία ανακοίνωσε σήμερα πως ξεκίνησε τις δοκιμές εξέλιξης του, στις οποίες συμμετέχει και ο Lee Noble, ο ιδιοκτήτης της Βρετανικής Noble και καλός φίλος του προέδρου της Arrinera Automotive, Lukasza Tomkiewicza.


Οι Πολωνοί δοκιμάζουν το σασί του νέου τους supercar, μετρώντας με το Racelogic πλευρική επιτάχυνση 1,4 g. Το αυτοκίνητο θα έχει αρχική τιμή τις £100.000 (€123.000) με χρόνο αναμονής 12 μήνες και είναι κατασκευασμένο από carbon. Μηχανικά φορά τον V8 6.2-λίτρων της Corvette ZR1 με 4 κομπρέσορες της Eaton που αποδίδει 650 άλογα και 900 Nm ροπής. Συνδυάζεται με ένα κιβώτιο ταχυτήτων της Graziano, ζυγίζει 1.300 κιλά και τα 0-100 χλμ/ώρα τα κάνει σε μόλις 3,3 δευτ, τα 0-200 χλμ/ώρα σε 8.9 δευτ, και τα 400 μέτρα σε 11 δευτ. με την τελική να φθάνει τα 350 χλμ/ώρα. Ωστόσο κατά τη διάρκεια των δοκιμών, η τελική ταχύτητα του αυτοκινήτου περιοριζόταν ηλεκτρονικά στα 250 χλμ/ώρα.

Το σασί είναι σχεδιασμένο από τον Lee Noble και είναι κατασκευασμένο από μεταβλητής διατομής χάλυβα υψηλής αντοχής και όπως ισχυρίζεται η εταιρεία, είναι εξαιρετικά ελαφρύ, ενώ ταυτόχρονα προσφέρει εξαιρετική αντοχή στις παραμορφώσεις.

Σε κάθε άκρο φορά ανάρτηση πολλαπλών συνδέσμων και ζάντες αλουμινίου 19 ιντσών με ελαστικά διαστάσεων 255/35 εμπρός και 335/30 πίσω ελαστικά. Τους μπροστά δίσκους των 380 mm τους πιέζουν 6-πίστονες δαγκάνες και τους πίσω των 350 mm 4-πίστονες. Διαθέτει δύο αεροτομές οι οποίες λειτουργούν και ως αερόφρενα σε ταχύτητες μεγαλύτερες των 150 χλμ/ώρα.

Στο εσωτερικό, η καμπίνα του Arrinera του καλύπτεται με δέρμα και σύνθετα υλικά, για πρόσθετη ασφάλεια έχει τοποθετηθεί roll bar πίσω από τα καθίσματα αλλά και ζώνες τεσσάρων σημείων. Διαθέτει LED φωτισμό και σύστημα πλοήγησης. Προαιρετική εφοδιάζεται με μια κάμερα νυκτερινής όρασης που εντοπίζει αντικείμενα που υπερβαίνουν τη θερμοκρασία περιβάλλοντος, όπως είναι οι πεζοί ή τα ζώα και τα εμφανίζει στην οθόνη της κεντρικής κονσόλας.

[Πηγή: Arrinera]

Δελτίο Τύπου

Arrinera Hussarya tests with Lee Noble

During September and October, in Warsaw and at Moto Park Ulez, the Arrinera Automotive team performed tests on the Arrinera Hussarya supercar rolling chassis (complete car without the body).

Lee Noble, a notable British car designer who has sold more than 2000 cars during his lifelong career, also participated in the tests.

Hussarya is equipped with a 6.2-liter, V8 engine manufactured by General Motors, and a manual, 6-gear gearbox, model T906HE (with torque sensing differential, self-adapting to the ground, friction coefficient), supplied by the renowned Italian company Cima. The maximum input torque of the gearbox is 900 Nm and maximum output torque – 6 000 Nm.

For tests Arrinera Automotive used a driving performance analyzing device supplied by Racelogic. According to data gathered by the device, the lateral acceleration was 1.4 g. The series of tests were designed to check the chassis at low and medium speeds, therefore the maximal speed limit was set at a safety level of 250 km/h. Tests with the speed ranging from 250km/h to 350 km/h for the complete vehicle, with  body, are planned for 2014 and will be performed at an R&D facility in the United Kingdom.

During the tests lasting several days, the rolling chassis was checked extensively for the functionality and ergonomics. The construction requirements, kinematics of the control system as well as the positioning and performance of other systems have been verified. The team also tested the aerodynamic brakes (symmetric and non-symmetric flaps deflection). Mr Janusz Piechna Ph.D. D.Sc from the Faculty of Mechanical Engineering, Energetics & Aviation from the Warsaw University of Technology also participated in testing. The chassis was tested on tires of the following sizes: 285/30/19 and 325/30/19 in the rear and 245/35/19 on the front, supplied by four different manufacturers.

In order to assess the driving parameters, Arrinera Automotive carried out the so called “moose test” i.e. the manoeuvre of the double change of lane, according to ISO TR 3888 requirements.

Rolling chassis is one of the most crucial elements of the car, therefore, it’s essential to examine it thoroughly. In order to do that, we used  advanced software and computers with high computational capabilities. This reduces the time and cost associated with building the rolling chassis of a car with a top speed exceeding 300 km/h.

The rolling chassis has been developed in cooperation with Lee Noble and meticulously checked by the Warsaw University of Technology. Several month-long tests were designed to analyze the endurance of the construction and verify its reaction in the event of the most adverse static and dynamic loads that occur while driving.

One of the key parameters that have been researched was the chassis torsional stiffness. This test determines the chassis reaction e.g. while cornering. Flexibility of the frame adversely affects the car’s handling. Bearing in mind ergonomics and positioning of particular components, mechanical engineers strive to achieve the best possible ratio of high stiffness to the lowest mass.

The Warsaw University of Technology also performed a simulation of stresses generated while driving one wheel on the obstacle. This situation often occurs in everyday usage such as whilst parking a car on the curb. In this test, special attention is paid to the stability of parameters such as the dimensions of the diagonals of the door frame or the windshield frame. It’s main objective is to avoid the situation when after opening the door it’s not possible to close them or the windshield breaks.

The University team also ran a simulation of the loads derived from aerodynamic forces acting on the chassis, which in cars reaching speed of 300 km/h (or more) can be crucial.

Another group of tests performed on the Arrinera Hussarya’s construction included dynamic loads. The analysis involved the maximum values ​​of the forces that can occur while driving, in the situations such as:

– Emergency braking

– Dynamic acceleration

– Driving around a circle

– Going over transverse bump

In this type of tests, the chassis is strongly burdened/loaded with forces derived from the reaction of the ground. Keeping in mind the group of drivers who would like to take the best out of the car’s parameters, we have considered i.a. a high grip coefficient that occurs while using track tyres such as slick.