Useful design rules and simple scaling models have been developed for solar sails. Chief among the conclusions are 1. Sail distortions contribute to the thrust and moments primarily though the mean squared value of their derivatives (slopes), and the sail behaves like a flat sheet if the value is small. The RMS slope is therefore an important figure of merit, and sail distortion effects on the ...

BACKGROUND The sail sign is a well-known radiographic feature of the pediatric chest. This sign can be observed in an adult population as well, but for a different reason. PURPOSE To investigate the sail sign appearing in adult chest radiography. MATERIAL AND METHODS Based on two anecdotal adult cases in which frontal chest radiographs showed the sail sign, we prospectively screened radiogr...

Solar sailing has long been envisaged as an enabling or disruptive technology. The promise of openended missions allows consideration of radically new trajectories and the delivery of spacecraft to previously unreachable or unsustainable observation outposts. A mission catalogue is presented of an extensive range of potential solar sail applications, allowing identification of the key features ...

The CubeSail is a nano-Solar Sail based on the 3U CubeSat standard currently being built at the Surrey Space Centre. The CubeSail mission aims to demonstrate the concept of solar sailing and at its end-of-life use the sail membrane for de-orbiting. One of the main challenges in the design of any Solar Sail is the deployment mechanism. This paper proposes a deployment mechanism for the CubeSail....

The purpose of this work is to investigate the forces applied, and the resultant material deformations and stresses, on a novice windsurfer sail. Finite Element Analysis (FEA) modelling is applied to both a mast and sail of a specified size. After verification of the modelling process, the results are analysed to identify possible improvements that could be made to the sail to enhance longevity...

Centimeter-scale spacecraft, known as ”Chipsats,” have very high surface-area-to-mass ratios, which accentuates solar radiation pressure (SRP) effects. In contrast to traditional. large solar sails, chip-scale solar sails have the potential to be highly agile in terms of attitude because of their structural rigidity and low moments of inertia. This ability to easily reorient a solar sail greatl...

There may be differences between this version and the published version. You are advised to consult the publisher's version if you wish to cite from it. The oscillating sail is a novel solar sail configuration where a triangular sail is released at a deflected angle with respect to the Sun-direction. As a result, the sail will conduct an undamped oscillating motion around the Sun-line due to th...

Solar sails employ a unique form of propulsion, gaining momentum from incident and reflected photons. However, the momentum transferred by an individual photon is extremely small. Consequently, a solar sail must have an extremely large surface area and also be extremely light. The flexibility of the sail then must be considered when designing or evaluating control laws. In this paper, solar sai...

The electric solar wind sail (E-sail) is a new type of propellantless propulsion system for Solar System transportation, which uses the natural solar wind for producing spacecraft propulsion. This paper discusses a mass breakdown and a performance model for 5 an E-sail spacecraft that hosts a scientific payload of prescribed mass. In particular, the model is able to estimate the total spacecraf...

The powering requirement of a land yacht is one of the most important aspects of its design. In this respect the wind tunnel testing is an effective design tool. In fact, changing the parameters of the vehicle and testing the changes in the wind tunnel will give us a better understanding of the most efficient vehicle, and yet it is time consuming, expensive, and has inherent scaling errors. Ano...