Trans RINA, Vol 157, Part C1, Intl J Marine Design, Jan –Dec 2015
4.2 VST PACKAGING DEVELOPMENT AND EXTERIOR DESIGN
The parametric packaging analysis is shown in Figure 15, where the use of Digital Human Models (DHM) of different percentile, and the volumes of the various key components and tanks are used to optimise the layout configurations, in order to determine key packaging hard points for the exterior
styling. The DHM were
97.5percentile Dutch Male and 2.5percentile Chinese female. The floor is at an angle of 3 degree when the helicopter is on the ground, so that it is horizontal during flight. Packaging benchmarking based on the EC135 for three packaging layout configurations are shown in Figure 16, for a range of different percentile and number of users. The conclusion of the analysis was that the interior volume needed to be increased to give the passenger greater head room. The final package drawing and specification of the SVT are shown in Figure X. The hybrid helicopter has 2 x OPOC engine with a 200L capacity diesel tank, with an electric motor powered by 253kg of Li-ion batteries. This enables the CO2 emission to be significantly reduced using electric drive during constant speed motion of the 20 minute commute by the user. The helicopter can be recharged using sustainable energy sources when parked at the office. The proportions are key to the exterior design of any Aston Martin. However the proportions of a helicopter are completely the opposite, in that a helicopter is tall, long and relatively narrow. Whereas an Aston Martin is wide and low, resulting in a sleek aesthetic. The exterior form was developed around the hard points of the helicopter package
drawing, shown in Figure 17. Therefore
ensuring the exterior design has Aston Martin DNA was challenge. This was address through the technical innovation of the contra-rotating blades which enabled the tail rotor to be removed. This reduced the noise levels due to blade interaction and increased efficiency due to the power loss of the tail rotor. The initial form exploration is shown in Figure 18.
The exterior form surface feature refinement is shown in Figure 19, where key automotive form visual references are show. The belt line, which runs from the nose all the way to the tail, breaks up the volume of the exterior, as the severity of the line gives a strong ground shadow. The paint graphic further breaks the volume through both colour and finish, as the lower part is satin, whilst the upper part is gloss.
Figure 19: Exterior form surface feature refinement
The physical model of the SVT is shown in Figure 20 below. The hockey stick shape of the daylight opening (DLO) is synonymous with Aston Martin, and on this design has a functional aspect, as there is a vent formed in the side glass, which provides an air inlet for the motors.
Figure 20: Model of SVT 4.3 SVT INTERIOR MOOD BOARD The main inspiration for the interior
design
was Figure 18: Exterior form development C-38
equestrian craftsmanship, and more specifically the Hermès Talaris saddle. This piece combines traditional craftsmanship with advanced materials, as it has a carbon and titanium structure making it lighter than traditional saddles. The colour and trim visual references are shown in Figure 21. However, a luxury helicopter has to have a certain level of comfort; therefore the seats within the interior have a tense yet comfortable aesthetic. They still meet the lightweight theme through the use of carbon fibre for the structural shell of the seat, but combine this with semi-aniline leather.
© 2015: The Royal Institution of Naval Architects
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