The “Wire Flyer” Flies!

November 14th, 2013

We just returned from a week offshore of New England on the R/V Endeavor where the new “Wire Flyer” vehicle was successfully tested.  The vehicle was developed by Dr. Chris Roman of the University of Rhode Island’s Graduate School of Oceanography as a means of collecting high-resolution profiles of seawater properties (CTD, O2, Fluorescence, etc) reaching depths up to 1,000 meters.

Todd has been the principle mechanical designer of the vehicle and its ancillary components for the past three years.   Aside from the vehicle, we developed a smart Clump weight and a custom over-boarding sheave with integrated docking-head.  The vehicle “flies” up and down a taut .322″ oceanographic cable by adjusting its wings while the ship moves at 2-4 knots through the water.  The Flyer is capable of a glide slope ratio of about 1:1, meaning it generates enough lift to move vertically at 2-4 knots while moving forward at the ship speed of 2-4 knots.  The Flyer is battery powered and aside from being able to communicate with it via acoustic modem, the vehicle operates autonomously.


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NOAA ROV “Deep Discoverer,” aka D2

September 30th, 2013

Beginning in Fall 2012, Gregory Designs took on a major endeavor to completely re-design and re-build a 6,000 msw rated ROV owned by NOAA Office of Ocean Exploration and Research.  Todd Gregory acted as principle Mechanical Engineer for the project.

Very little of the original vehicle was left untouched.  The electronics were repackaged into a single 6,000 msw rated Titanium pressure housing of our design.  The syntactic foam was re-configured.  The hydraulic system was re-worked.  The arrangement and function of all ancillary components of the vehicle were either altered, moved, or replaced.

The vehicle was re-built and tested at a NOAA facility at the University of New Hampshire, the Center for Coastal and Ocean Mapping, where there is a large fresh-water tank for testing the ROV.  In Spring 2013, the vehicle was shipped to North Kingstown, RI where it was installed and integrated onboard the NOAA ship OKEANOS EXPLORER. Seatrials were conducted in May and June, 2013, off the New England coast in waters up to about 4,000 meters.

The vehicle was christened “Deep Discoverer” after a former NOAA ship of oceanographic exploration, the “DISCOVERER,” serving our country from 1922-1947.  The ROV operations team has lovingly re-dubbed the vehicle “D2,” for short.

D2 just completed its first of many seasons of oceanographic exploration!  Explore more about NOAA’s OER program and the re-birth of their ROV here.


Photo Credit: Art Howard

Photo Credit: Art Howard



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E/V NAUTILUS Multibeam

September 30th, 2013

In 2013, the Ocean Exploration Trust (OET) purchased a Kongsberg EM-302 multibeam mapping system for Dr. Robert Ballard’s ship, E/V NAUTILUS.  Todd Gregory provided the conceptual design for the hull’s 3-Dimensional fairing as well as the detail design for installing the ancillary underwater acoustic instruments (USBL, ADCP, Sub-bottom Profiler array).  Project management was conducted by OET port Engineer, Ian Kulin.  Fabrication was overseen by John Toner of Maritime Management.  Testing was assisted by French scientists at IFREMER.

In a 3rd-party assessment of the design, fabrication, and testing of the new system by Gates Acoustic Services, owner Tim Gates states,

“It should be noted that OET was very diligent in pursuing every possible advantage that would increase sonar performance. Significant efforts were made investing in the sonar blister design, which ultimately produced a novel, state‐of-the‐art design by Todd Gregory, that was fabricated to perfection in Tuzla, Turkey under the direction of John Toner. The EM 302 blister on NAUTILUS is a work of art that will be imitated over time by rival oceanographic institutions. The lines are smooth, the surfaces fair and the shape is optimal for providing a platform for very good sonar operations.”

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Ocean Bottom Seismometers

October 17th, 2012


Gregory Designs was the mechanical engineering consultant for the design of a new Ocean Bottom Seismometer (OBS) system for Woods Hole Oceanographic Institution.  In collaboration with Jim Newman of Woods Hole Marine Systems, we conducted the design of the pressure housings, the electronics chassis arrangements, the structural frame, the acoustic release mechanism, the syntactic buoyancy module, and all ancillary components and brackets.  Thirteen OBS’ were deployed from the R/V Wecoma in fall 2011 and all 13 successfully recovered in spring 2012.


Photo Credit:  Dan Kot, WHOI

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Professional Engineer Exam Passed

February 21st, 2011

Todd Gregory passed the Rhode Island Professional Engineer licensing examination.  He is now a fully licensed Mechanical Engineer.

The PE examination process is composed of two examinations and a period of professional experience.  The first examination, the Fundamentals of Engineering, is taken after the completion of four years at an accredited engineering college.  The second exam, the Principles and Practices of Engineering, is taken after at least four years of professional experience has been attained.

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Turner DHR

August 13th, 2010


The long awaited Turner DHR downhill frame is now available.  We spent 18 months designing, prototyping and redesigning this baby.  It is as much a work of industrial artwork as it will be a world cup racing bike.

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ROV operations on Okeanos Explorer

March 19th, 2010

Gregory Designs just returned from two weeks on board NOAA’s ship of exploration, the Okeanos Explorer.  We installed an ROV system on board the ship and then completed three ROV dives off the Kona coast of the Big Island of Hawaii.  Mahalo to the crew of the ship and best wishes to the team of ROV engineers.

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Website Launch

November 14th, 2008

Gregory Designs, LLC is proud to make its debut on the web.

After three years of business, we thought it an appropriate time to create a place on the web to showcase the capabilities of Gregory Designs.  We continue to support our pool of clients and look forward to new challenges and future collaborations.

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