Regent Craft Inc.

Harvard College

Andrew Levin

Daniel B Cottrell

Michael Klinker

William Bryan Baker

Andrew Gregg

Jason Castriota

Edward Andrew Lester

Christian Bailey

William Thalheimer

Bradley C Buskirk

Marco Borge

David Larson

Michael Christopher Tilley

Christopher Lee

A craft comprises at least one hull; at least one wing configured to generate upwards aero lift as air flows past the at least one wing to facilitate wing-borne flight of the craft; a front hydrofoil connected to the at least one hull via a front hydrofoil strut and configured to generate upward hydrofoil lift as water flows past the front hydrofoil to facilitate hydrofoil-borne movement of the craft through the water; a rear hydrofoil connected to the at least one hull via a rear hydrofoil strut and configured to generate upward hydrofoil lift as water flows past the rear hydrofoil to facilitate hydrofoil-borne movement of the craft through the water; and a control system. While the craft is hydrofoil-borne, the control system is configured to facilitate transition of the craft from hydrofoil-borne operation to wing-borne operation via a process comprising: while the upwards aero lift generated by the at least one wing is below a threshold lift, controlling one or both of the front hydrofoil and the rear hydrofoil to generate a downward hydrofoil lift that causes the front hydrofoil and the rear hydrofoil to remain at least partially submerged in the water; and after the upwards aero lift generated by the at least one wing has increased above the threshold lift, transitioning the craft from hydrofoil-borne operation to wing-borne operation at least in part by controlling one or both of the front hydrofoil and the rear hydrofoil to switch from (a) generating the downward hydrofoil lift to (b) generating an upward hydrofoil lift that pushes the craft up and out of the water.

Hydrofoil takeoff and landing with multiple hydrofoils

A craft includes a hull, a wing, a hydrofoil, and a control system. The wing is configured to generate upwards aero lift as air flows past the wing to facilitate wing-borne flight of the craft. The hydrofoil is configured to generate upwards hydrofoil lift during a first mode of operation as water flows past the hydrofoil to facilitate hydrofoil-borne movement of the craft through the water. While the craft is hydrofoil-borne, the control system is configured to determine the upwards aero lift generated by the wing. The control system is further configured to control the hydrofoil to generate downwards hydrofoil lift to counteract the upwards aero lift generated by the wing that maintains the hydrofoil at least partially submerged in the water while the determined upwards aero lift is below a threshold lift.

Wing-in-ground effect vehicles and methods of control

Hydrofoil equipped seaglider takeoff

A polypeptide is located in a gel matrix by treating the matrix with a negative staining agent (i.e. an agent that stains the gel more intensely in regions devoid of polypeptides, so that gel areas exhibiting reduced staining intensity are indicative of the presence of polypeptide). Specifically, the staining agent comprises a copper or cobalt salt, and a detergent. The term polypeptide is used to include polypeptides of all sizes, including proteins and glycoproteins. The polypeptide can be purified by applying it to a gel matrix, causing it to run into the matrix, applying the above-described staining agent and then eluting the polypeptides from the matrix.

Protein detection by negative staining

Growing community of inventors

Cambridge, MA, United States of America

Andrew Levin