Low Density – High Accuracy – Making it Happen with PBLT-4

From the snowy mountains of Colorado, Donn Arrell, owner of Clinton Systems and topographical model maker extraordinaire, sent in a picture of his latest creation.

Donn CNC-machined this topographical map using Precision Board Plus PBLT-4, which is the  lowest density of Precision Board that we manufacture, because his customer was interested in a highly-detailed model, but was very cost-conscious.

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It’s interesting to note that despite the low density, the level of detail on the model is magnificent. A DWG CAD file containing the contour lines was the source for deriving the 3-D model, and the flat area on the far left is due to missing data from the NED file given to Donn for this project.

Additional information about the topographical models crafted by Clinton Systems can be seen at: www.clintonsystems.com.

Going Global With Insignia!

With a motto of “Helping you leave your mark on the world,” Orange, CA sign shop Insignia was well suited to tackle the massive 3-D globe project proposed to them by DOW Chemical.

DOW requested the globe be lightweight enough for customers to lift, which was no problem for the creative minds at Insignia. According to owner Joseph Westbrook, “We worked pretty closely with DOW to make a lightweight sculpture for their trade show exhibit. Because it needed to be so light, we decided to use Precision Board Plus PBLT-6, which is lightweight, but would still allow us to retain a high degree of durability.”

With the concept completed, the next step was blueprinting the design and planning the most efficient assembly build process. “The most challenging part of this project was figuring out how we were going to cut and assemble it as a whole,” states Westbrook. “Through collaboration with Dan Sawatzky of Imagination Corporation, we ultimately decided to CNC rout the Precision Board in many different sections – 16 to be exact – which took a lot of time. Our CNC router ran day and night to get all the pieces cut.”

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With so many pieces to assemble, putting the project together was a little like a game of Tetris. “We used Coastal’s PB Bond-240 adhesive to put together the different pieces of the globe. After we assembled the entire thing, we used a combination of FSC-88WB Primer/Filler and FSC-360WB HDU Filler to fill in the joints where it came together.”

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After painting the entire project with 1Shot Paint, it was ready for delivery to DOW. As this picture shows, the goal of making the project light enough to lift was a success – through the use of a hollow globe, the globe weighs only 50 lbs.!

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Additional information about Insignia and other creative ventures they have tackled can be seen at: www.leavingyourmark.com.

Races in The Sky: The Jon Sharp Story

Part 2 of 2

Known as the “winningest pilot in the history of air racing,” Jon Sharp is a legend known for building fast planes and pushing them to the limit. Last week we wrote about Jon and his career working at Lockheed Martin’s Skunk Works, this time we’re jumping in the cockpit with him to examine his career in air racing.

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It’s hard to believe, but Jon fell into air racing almost entirely by accident. When he purchased his first airplane in 1978, a Cassutt Special named “Bilbo” from Dave Bice, his main interest was flying it around.

cassutt_tomCassutt Special designer Captain Tom Cassutt with the “Cassutt #1” in 1954.

Not long after buying the plane came a call that would change both Jon and air racing forever. Bob Downey, an old-time air-racing pilot known as the “Ole Tiger” and an air racing legend in his own right, called his friend Dave Bice to ask him to participate in an upcoming air race in Mexicali, Mexico. When Dave mentioned he had sold the plane to Jon, Bob called him next – and it’s a pretty easy guess how that call ended.

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Preparation for that first race in Mexicali was no easy task and took about a month. Jon and his fledgling team worked long hours building a trailer and readying the aircraft. In addition to the solid support of his wife Patricia (which would continue throughout his racing career), Jon also benefitted with help from friend and former work colleague (from George Applebay’s sailplane shop) Steve Hill, who would function as his crew chief in Mexicali.

Race day came up pretty quick, and I asked Jon how he felt, sitting in the cockpit of Bilbo in his final moments before takeoff:

“Sitting on that runway with the race about to start, and six other planes with far-more experienced pilots right next to me, I was absolutely petrified. My nerves were completely shot and stayed that way until the engine started. I ended up placing dead last on that first race, mainly due to the typical rookie mistake of ballooning up in the turns. That was the first air race I ever saw, and it was from the cockpit.”

“I finished the race and talked with Bob (Downey), who had been watching the race from below and he gave me some pointers on how to stop that. Bob also let me use his personal metal prop so I could switch out the wooden one I was using. That wooden prop would spin at maybe 2,900 or 3,000 RPM’s max., but the metal prop spun around 3,700 or 3,800 RPM, which was a huge improvement. With help from Bob, there were two more races that weekend where I did much better.” 

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From the time he competed in that first race, Jon was hooked.

“As soon as I participated in that first race I was hooked and wanted to get better. I got home from the races and hadn’t been there two hours before I ordered my own metal prop. And I watched for that UPS truck for a solid month before it got there,” remembers Jon.

Jon was mentored by Bob for that race, and many more to come.

“Bob Downey acted as a sort of pilot instructor towards me. We would go over the race route, and many times Bob was already familiar with the track, so he would provide suggestions about the race from start to finish, different turns etc.,” says Sharp.

Jon originally raced in the Formula 1 race class, which changed to International Formula 1 (or IF1) in 1981 after a merger with the International Formula Midget class. As his racing skills increased, Jon started gaining sponsors, one of the first being Aeromag. In recognition of this, he changed the named of his plane from “Bilbo” to “Aero Magic.”

Aero Magic flew from 1981 until 1989, performing well, with competition wins in 1982 and 1986. He also won the Fastest Qualifier Trophy at Reno twice. Jon married his wife Patricia in 1989 and decided to move to California, putting air racing on the back burner for 8-10 months. Early in the year, he discovered that the wing on Aero Magic, while top-of-the-line when originally purchased, was far from the best available in 1990. After contemplating several ideas such as building a composite wing for Aero Magic, he ended up deciding to start with a clean sheet of paper and build a new airplane.

The new plane was to be christened “Nemesis”, and would take over a year to build. Nemesis weighed in at 520 lbs. and was powered by a blueprinted Continental 0-200, eventually producing well over 100hp and RPM’s over 4,000 (manufacturers redline was 2,750).

Jon describes the tooling process: “the parts for Nemesis were made from with a combination of HDU and polystyrene molds that were all hand carved with a wet bucket and brush hand-layup technique and cured in what we called the “Mojave-clave”, which is a 120 degree hanger in mid-summer Mojave, CA.”

Lockheed Martin Skunk Works teams up with Nemesis Air RacingNemesis next to the SR-71 Blackbird at Lockheed Martin Skunk Works

The combination of Jon’s skill on the track coupled with the well-designed Nemesis resulted in an absolutely unstoppable duo. Nemesis made its debut in 1991 at the Reno Air Races. Upon seeing the plane, another 1F1 pilot, Bruce Bohannon said to Jon: “this plane is either going to be our nemesis or yours.” After watching a qualifying run, he told Jon, “I figured it out.”

Nemesis went on to win 47 of 50 races entered from 1991 – 1999. Two of the losses were the very first and second races, the first due to Jon hearing a noise he’d never heard before, and the second the result of prop testing. Throughout its 9-year career, Jon, Nemesis, and the Nemesis Air Racing Team would live their motto “Chase the Dream…Not the Competition”, while amassing 9 Gold Reno Championships, receiving the Fastest Qualifier Trophy 6 times and winning four Pulitzer Aviation Trophies.

Air racing is of course an inherently dangerous sport. I asked Jon what one of the most shocking things he saw was and he stated: “I saw a gentleman parachute out of his Corsair once in 1995 at a race in Phoenix. His plane caught fire, and he hit the fire bottles and it went out. Well, the fire came back and he was forced to step onto the wing and parachute out of the plane.”

“Throughout its entire racing career, Nemesis had but a single problem in its life. On my very last landing at Mojave, I got a flat tire as I was landing and almost skidded off the runway. After that, I made it safely to Oshkosh, WI, for the official Nemesis retirement at the EAA Oshkosh AirVenture before it went to the Smithsonian. After retirement, I found myself in the world of gambling.” says Jon.

In 2000 Patricia, while at the hangar working, received a phone call asking if they would be ok with housing Nemesis in the Smithsonian, next to the Enola Gay, SR-71 Blackbird and the Space Shuttle Enterprise to be exact. Jon and Patricia of course agreed and donated Nemesis to the museum where it resides today. Nemesis has been described by the National Air and Space Museum as: “The most successful aircraft in air racing history.

800px-NASM_-_NemesisNemesis inside the National Air & Space Museum

After twenty years of racing, Jon sure as heck wasn’t done, and in 2000 started drawing and sketching designs for a completely new aircraft. After several iterations, the proposed designs were only offering gains of 2, 3 or 4 mph. 

“We weren’t interested in spending the money to build a plane that we weren’t even sure would be faster than what we already had. After careful thought, we decided to move up into the Sport racing class, which would allow us to use a larger engine and realize a larger speed gain. This plane would be called the NemesisNXT,” says Sharp.

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Unfortunately, not long after Jon announced he was leaving IF1 and moving into the Sport-class, the rules were adjusted, requiring all Sport-class planes be kit airplanes, with a minimum of 5 kits sold. Forced to join the kit business or not compete, (Jon likens it to having the goalposts moved in a football game), he managed to get 5 deposits in five weeks on the NemesisNXT – despite the fact it wasn’t finished and had never been flown.

Jon’s friendship with Chuck Miller, President of Coastal Enterprises (manufacturers of Precision Board Plus polyurethane in Orange, CA), meant he was able to secure a donation of Precision Board for the tooling required to build NemesisNXT. The importance of this will be especially clear to anyone familiar with the costs associated with bringing an aircraft from concept to reality.

According to Jon, “We used Precision Board Plus PBLT-20 to make molds for the leading edge closeouts, the horizontal tail, production parts for the leading edges, interior components, the vertical tail, and as a mold for the 90 gallon gas tank. All of the molds were CNC machined, which resulted in our most accurate airframe ever produced. Precision Board, with its tight cell structure and ease of machinability enabled us to bring our first computer-designed  aircraft to life.”

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Because all of the molds were machined so accurately, Jon’s Chief Aerodynamicist Daren Kimura was able to accurately predict performance and stability information. Jon’s team also produced a flight simulator for the NXT using open-source code and Jon was able to simulate races before even flying the plane.

The NemesisNXT debuted in May 2002 at the SAMPE convention in Long Beach, CA, weighing in at 1,200 lbs. empty, 2,200 lbs. loaded. It was powered by a Lycoming Thunderbolt TSIO-540-NXT engine, custom designed by Lycoming engineers working in conjunction with the Nemesis Air engineering team.

6991 Nemesis taxiPhoto Credit: Tim Adams Photography

Jon raced the NemesisNXT for the first time at the 2004 Reno Air Races, resulting in the most terrifying moment of his air racing career. “As I was landing the plane after a qualifying run, the landing gear collapsed, and the plane went down on its belly. I ended up skidding off the runway and into the dirt, but luckily nothing happened and I ended up ok,” says Jon.

The first two years racing NemesisNXT were rough, with technical difficulties hindering both the 2004 and 2005 Reno Air Races. The following year brought the Nemesis team their first of four consecutive Reno Sport / Super Sport Class championships. 2008 saw the NemesisNXT surpass the 400 MPH barrier reaching 409 MPH during a qualifying lap at Reno – an astounding achievement for a plane in the Sport class.

1361 Nemesis on rampPhoto credit: Tim Adams Photography

The next year, 2009, was Jon’s last year racing, and his most successful. The Reno Air Races that year saw him round up his career with an astounding “Record a Day, and 2 on Sunday” performance. On September 15th at the Reno Air Races, NemesisNXT set a new qualifying record of 412 MPH. This record was faster than the planes in the Unlimited class, over 32 planes including eight P-51 Mustangs and two P-40 Warhawk’s.

September 16th saw the NemesisNXT beat it’s own heat race from 2008 to a new record of 393 MPH.

September 17th saw the team beat the previous day’s heat race record, with a new race speed of 399 MPH.

September 18th, the team beat the previous day’s heat race record again with a top speed of 406 MPH!

September 19th, Jon’s final race, saw him absolutely dominate the class with a championship race record of 406 MPH, at the same time also winning a record 15th Reno National Championship to complete his career.

I asked Jon what his most memorable moments were in his air racing career and he said: “In the thirty years I competed in the air racing circuit, my most memorable moments are my very first race victory in 1982, the first victory with Nemesis in 1991, and the bookend with NemesisNXT in 2009.”

“What is my favorite part of air racing? The checkered flag! It’s a great feeling as you cross that line.”

-Jon Sharp

783726e687d9a4fdce440d77a6f4325cPhoto credit: Air Racer: Chasing the Dream

Please see additional information about Jon Sharp at nemesisnxt.com.

Jon Sharp and NemesisNXT have also been featured in Air Racer: Chasing the Dream, a documentary shot and directed by Christopher Webb.

This is a preview of Air Racer: Chasing the Dream

 

 

UCSD Human Powered Submarine Takes The Plunge

UCSD ASME students took the plunge with their Human Powered Submarine, “Legasea”, at the 12th International Submarine Races in Bethesda, MD, this past June.

The event was held at the Carderock Division of the Naval Surface Warfare Center in the David Taylor Model Basin, one of the largest ship model basins in the world. The competition consisted of 19 teams competing in a 100 meter race. Each team was required to design and build a one or two-person “Wet” submarine, which has a completely flooded hull and requires the crew members to breath SCUBA from an onboard air supply.

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UCSD students designed and created “Legasea”, a 2-man, propellor-driven, Human Powered Submarine that was designed with SolidWorks and built from scratch by UCSD students. Students relied almost entirely on donations, both material and financial, to bring Legasea to life.

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Coastal Enterprises was proud to donate Precision Board to the UCSD Human Powered Submarine team to use for their mold-making process for the submarine’s body.

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According to Elliot LaBarge, team leader, “We planned to use the 10lb and 15lb. Precision Board we had to make molds we could pull the fiberglass body components of the submarine from. Since the submarine is 21′ long, we decided to make three separate molds and join them together – a task we learned was much easier said than done, due to the large size of the molds.”

Diversified Manufacturing of California was kind enough to lend their CNC capabilities and expertise to the students, producing three perfect molds from Precision Board PBLT-10 and PBLT-15 and spraying them with PLC Polyprimer 903 Black. Once the molds were back in the students hands, they coated them with a Honey Wax mold release compound and PVA (polyvinyl alcohol), and were able to successfully pull three separate body components – a fiberglass nose, center and tail.

Once the body components were ready, the battle wasn’t over yet. An extensive assembly process began followed by as much testing as possible before the race.

“Precision Board worked great because not only is it durable and able to withstand several pulls, but it also has excellent machinability, which really helped us bring the submarine we designed to life”, says Elliott.

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When it came time to race in June earlier this year, Legasea placed 3rd in the two-person, propellor-driven category. Sub speed was measured by two timing gates halfway through the course, which recorded Legasea’s top speed at 3.42 knots. Unfortunately, a critical failure of the steering control rods rendered them inoperable, resulting in Legasea being unable to complete the final race.

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The next International Submarine Races will be held in June of 2015, and Coastal Enterprises will be working closely with the new team leader, Mr. Alistair Twombly, as they redesign Legasea for the next competition.

Check out more info about this project on the official UCSD Human Powered Submarine website: http://asme.ucsd.edu.

Video of the final “pool test” prior to the race:

Topographical Modelmaking In A Nutshell!

With millions of data points and tolerances tighter than some high-powered engines, topographical modelmaking, or digital elevation modeling, is a learned art requiring a keen eye for details.

Topographical models are frequently used by a variety of industries including geologists, architects, construction firms and land developers. They are often seen in museums and visitor centers, and are a great way for people to get a “Bird’s eye view” of a large area to analyze anything from geological changes to potential construction sites.

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We recently had a chance to speak with topographical model maker Donn Arrell, owner of Clinton Systems, about some of the beautiful models he has made over the years. Donn’s first step before building a model is securing an accurate data source. This can be in the form of a CAD drawing provided by the customer, or a drawing acquired from a source like the National Elevation Dataset (NED).

After selecting the resolution and scaling the drawing (which is a lot more work than it sounds), Donn will run a simulation which will indicate how long it will take to CNC machine. It’s then a matter of selecting the material (Donn uses Precision Board Plus), and starting the CNC on its course.

Most of the models Donn produces can be finished in a day or two, but occasionally large projects require a week or more of running the router day and night! (Which didn’t surprise us after seeing some of the models!) Many of these models will then go onto another professional Modelmaking shop who may paint it and add LED’s or even moving parts.

Mars HiRise images of sites in Gale Crater at 600 data points per inch. Models represent areas of about 3 miles x 8 miles (8″ x 22″).

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Donn prefers using Precision Board Plus HDU for his topographical models because:

“Precision Board offers a broad density range. Hard to damage touchable models can be made with the higher density foams. Cost sensitive projects gain cost benefits with lower density foams. Having a single source provider for these materials is a great advantage.”

Clinton Systems has been in business for over 20 years and specializes in high quality, high-resolution topographical models. Be sure to take a look at their website for more info: www.clintonsystems.com.

All of these models are made out of Precision Board Plus HDU.

Model of a recent NASA Mars Rover landing site in the Gale Crater. Carved into Precision Board Plus PBLT-20 at 600 data points per inch resolution. Using high resolution data from a Mars HiRISE image.

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The “Couteau”, a region of North and South Dakota, Iowa, and Minnesota. Made using Precision Board Plus PBLT-20.

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A site study model for new construction in in Guam from survey data. Made using Precision Board Plus PBLT-10.HDUTopographicalModel

 

A 15′ rendering of Sinnemahoning State Park based on the USGS 3 meter high resolution Lidar data. Made in 3 height matched sections from Precision Board Plus PBLT-20.PrecisionBoardElevationModel

Small architectural base model for easy transport. Note the recess for inserting a 3D building model in the lower right hand corner. Steps clearly show drainage and grading. The data source is an architectural CAD rendering. Precision Board Plus PBLT-20.
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Jackson Hole, Wyoming, Ski resort with some vertical exaggeration to emphasize the ski slopes. Data from the USGS National Elevation Database. Precision Board Plus PBLT-20.

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Base for a site development presentation model, 8′ x 12′ made from Precision Board Plus PBLT-6 in 3 height matched sections.
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