Ecosse ES1 Spirit

Design/Architecture
The ESI has a frameless chassis with unique suspension design at both ends of the bike. The front and rear suspension use torsion springs fitted on the swingarm pivots and F1 spec dampers mounted directly between swingarm and engine.

Front suspension is a common double wishbone arrangement. However, for ES1, the lower wishbone is a composite single-sided swingarm. The unique aspect of our design is the way we mount the handlebars from the fork rather than from the frame – providing a very direct connection between handlebars and front wheel for front tire feel.

At the rear the carbon fiber swingarm has a slender section between the gearbox and the rear wheel to create the narrow position we need for ES1’s aerodynamic and ergonomic concepts.

PERFORMANCE

The design drivers behind the bike are relatively simple: light weight, low aerodynamic drag and improved rider ergonomics. But achieving profound improvements in all areas has required genuinely inventive steps to bring F1 technology to the motorcycle world. Using state-of-the-art CAD, FEA and CFD software, the ES1 features:

- Integrated & fully stressed engine/gearbox
- Novel Suspension design
- Optimization of aerodynami

ES1 SPECIFICATION

Engine: bespoke 1000cc IL4 race engine designed and manufactured by one of UK ’s top race engine specialists (Note: the graphics show the generic IL4 engine used in the CAD model)

Power Output: >200 bhp
(dependent on customer’s specification)

Chassis: Frameless design with carbon fiber front and rear suspension. Torsion bar springs and F1 spec dampers.

Dry Mass: 265 lbs/120 kg
Wheelbase: 1420 mm
CdA: 0.16

Performance:
Top Speed: >230 mph/370 kph
(dependent on customer’s specification)

Additional benefits:
- Low friction suspension
- Optimized suspension kinematics
- Controlled lateral flex
- Ergonomics
- Fuel Economy/Low CO2 Emissions

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