Book Review: Donald Duck A Muddy Fine Business; Artistic Equipment Design

Front page of Penny Pincher magazine with Donald Duck as dredge master (Credit: Disney)
Front page of Penny Pincher magazine with Donald Duck as dredge master (Credit: Disney)

Donald Duck is a Jack of all trades, that he eventually he would end up on a dredge was inevitable. The story was already published in 1977 in a Donald Duck comic magazine. It is written by Freddy Milton1 and drawn by Daan Jippes2. At that time, I read it and already liked it very much. Later, I had it in a comic album3, but lost it moving to a new house. I wanted to review this story here already for a long time. Eventually, I consulted ‘Bul Super’ in Delft4, he advised me to search for Daan Jippes. That helped to find the story back on the internet.5

Opening scene of ‘Muddy Fine Business’ or ‘Success Test’ (Credit: Disney)
Opening scene of ‘Muddy Fine Business’ or ‘Success Test’ (Credit: Disney)

The story revolves around the endless feud between Donald Duck and Gladstone Gander. This time they have to compete in a success test by operating two different vessels: a ferry, ‘Seagull’ and a dredge ‘Aristoteles’. They have varying degrees of success and the outcome is unexpected.

The best known illustrator of Donald Duck is Carl Barks6. But Daan grew into his footsteps and eventually his stories are at the same level as the original master. He was with the Disney studios in the USA, but was working mostly in the Netherlands. In this edition, Jippes drew one of the most Dutch professions: dredging. Jippes had a keen eye for the elements that make up a dredge, tough the execution lacks some reality. Here I want to highlight some shortcomings that will help to illustrate the tricks that should have made it work and explain how real life dredging equipment functions.

Various details of the ‘Aristoteles’ (Modified from Disney)
Various details of the ‘Aristoteles’ (Modified from Disney)

The ‘Aristoteles’ is a truly multi-functional dredging vessel. It features both a grab and a bucket chain and the sediment can be loaded unto the vessel itself like a hopper or into a barge in tow. It is also self-propelled, although there seems to be a magical power generation as there is no visible exhaust pipe. Maybe Donald is again ahead of his time and running fully electric already?

Than the dredging equipment; the grab is suspended from a gantry, but it does not seem to be able to swing. Loading the tow barge would be difficult, as he has to reposition either the dredge or the barge. Apparently Donald should know about the technology of a rotating crane, as the picture on the front page has such a crane. And how would the material end up in the hopper?

Discharging buckets with reception carriage on a bucket ladder dredge
Discharging buckets with reception carriage on a bucket ladder dredge

Maybe with the other dredging tool: the obvious bucket chain? Though it is not supported on a ladder. Maybe that makes sense, as the buckets seem to be positioned on port or starboard in various panels. The material falling from the buckets might end up in the hopper. The vertical orientation presents some difficulty, as the material will fall onto the previous bucket and eventually through the well. In a normal operation, this is controlled by moving a carriage receiving the load and bringing it to the chutes. With a real vertical orientation, this would not be helpful anymore.

I once saw a solution for working with a vertical bucket chain on an exhibit in the National Dredging Museum7. A manual operated drawer-like slide was moved between every passing bucket to catch the load. It seems very labour intensive and prone to accidents.

Even after breaking down these operational details in the design of the ‘Aristoteles’, the vessel serves its purpose in the story: it is a really useful dredge for dredge master Donald. Well done Daan.

Exhibit with vertical ladder at the national dredging museum
Exhibit with vertical ladder at the national dredging museum

Call to the audience

The exhibit is still there, but unfortunately, it is broken. The mechanism has to be repaired, any model building fanatics are invited to help the museum restore it. There is a special event for new volunteers, now!

References

  1. Freddy Milton, Wikipedia
  2. Daan Jippes, Wikipedia
  3. Oom Dagobert En De Ondergrondse Kluis, nr34, Disney
  4. Stripboekhandel Bul Super
  5. Read online Walt Disney’s Comics Penny Pincher comic – Issue #4, ZipComic
  6. Carl Barks, Wikipedia
  7. Nationaal Baggermuesum

See also

Our Interview About New Pump Designs In The Latest Damen Nieuws

Headline of our interview in ‘Damen Nieuws’
Headline of our interview in ‘Damen Nieuws’

Another magazine dropped on my doormat, albeit a digital edition of ‘Damen Nieuws’1. The internal magazine for Damen colleagues. It featured an article with Suman Sapkota and me. Suman is our pump design specialist2 and at a Damen wide R&D convention he presented a poster on his pump design workflow within Damen Dredging Equipment. This caught the attention of the editorial board and we were interviewed on what we actually do for a living. Although we can’t share the exact details of the article or the poster, it is still an interesting message that we can highlight here.

Pump design workflow (inspired by Suman Sapkota)
Pump design workflow (inspired by Suman Sapkota)

The design of a dredge pump is based on the required specifications(1). The most important properties of the pump are: efficiency, NPSH, wear and ball passage. The first important property we try to fix is the ball passage3. We do use our own geometry generator(2) that assist us in creating a pump with a big ball passage. Unlike normal pumps, dredge pumps have to cope with debris and boulders that have to pass the impeller. The bigger chunks that can pass, the more uptime the dredge will have. Once we are satisfied with the geometry, we feed this through a file format converter(3). The resulting 3D file can be used on several platforms. This will enable us to create the digital solid for the engineering4, but it also gives us the negative volume, also known as fluid. Then to do mathematical operations on the digital fluid, we have to divide the volume into tiny cells. This process is called meshing.(4) When the mesh is available, the fluid flow through the mesh can be simulated with computational fluid dynamics.(5) All the fluid properties of every cell are calculated and the results are shared with the adjoining cells. This can be repeated until all properties of the cells don’t change very much anymore, a stable solution. Integrating all the properties of the cells give the resulting performance of the pump.

Balancing the four dredge pump performance properties
Balancing the four dredge pump performance properties

The estimated performance can be evaluated against the four properties.(6) The head times the capacity divided by the power required will give the efficiency. That is one of the items we wanted to know, as it relates to how much fuel will be consumed. The other parameter obtained from the CFD is the NPSH, or roughly: the suction performance. Wear cannot be estimated yet, but we are working on that2. Although the calculated turbulence might give a clue what wear to expect. If the properties are not satisfying our requirements we make an iteration in the geometry for improving the performance. However, changing the geometry will usually result in a smaller ball passage. If the parameters are OK to our requirements we have a pump design.(7) Manufacturing it is a completely different game.5

The design process of the dredge pump takes quite some effort and we are continually looking to improve the workflow6. Eventually we would like to be able to cater for all special requirements each individual customer might have.

Working for a dredge manufacturer, I am happy we design and produce our own pumps. It gives us the confidence, that when we supply dredges, they are as we like them to be. Another benefit is in discussions with the customer. It is easier when we can sit at the table as experts on their equipment assit them in finding a solution for their dredge.

Pump experts immersing themselves in checking the design of their pumps
Pump experts immersing themselves in checking the design of their pumps

References

  1. Damen Nieuws, Juni 2020, Damen
  2. Graduation Suman Sapkota: Where wear parts were worn down, Discover Dredging
  3. On The Relation Of Maximum Ball Passage And Recirculation Losses In Dredge Pumps, WODA
  4. Graduation Of Carsten Markus: Designing And Casting Of Impellers
  5. Don’t Play Games With Your Wear Part Planning
  6. Innovation, Damen

See also

The Good Side And The Bad Side Of A Statue At Port Said

Statue of Ferdinand de Lesseps in a garden at Port Said Shipyard
Statue of Ferdinand de Lesseps in a garden at Port Said Shipyard

As you’ve probably already guessed, I am quite fond of old stuff. Especially when it has some relation to dredging. Last post on Omar’s graduation1 not only brought back my memories on the interesting lectures by professor de Koning2, it also rekindled my inspiration to write about something that I have up my sleeve for a long time already. Although, due to the current global turmoil3, the message that I want to convey has been drastically altered. It turns out to be more of an opinion than an informative perspective on the history of the Suez Canal.

It was in the early years of my career, that I was building dredge ‘10th of Ramadan’ for the Suez Canal Authority4. We designed the dredge and prepared the components at Damen Dredging Equipment5, but the actual construction took place at Port Said Shipyard6, a subsidiary of the client. I’ve spent many hours roaming over the yard to locate components that were sent there and we needed them to inspect or install. On one of those excursions, I encountered the statue of Ferdinand de Lesseps.

Ferdinand De Lesseps was an interesting figure7, who owed his success to being the right person at the right time at the right place. In his earlier career, during a quarantine period in 1832 in Alexandria, he received a book that discussed Napoleons ideas about connecting the Mediterranean with the Red Sea8. Captivated by this idea, he was able to use his connections and positions to get the concession to dig the canal as we know it in 1859. In honour of this achievement a impressive statue was placed at the beginning of the Canal at the Port Said side after the opening in 1869.

As it happened in those days, the Compagnie Universelle du Canal Maritime de Suez, claimed the canal and all involved land and business for the French government. All revenue from the Canal ended up in France and not in the country that had worked so hard for the Canal. This has been a great disappointment for Egypt. When Nasser declared the Suez Canal a national property in 1956, the statue was removed as a gesture that Egypt was independent and no European country had any business ruling it as a colony. In a careful act of historical awareness, the statue was not destroyed, but placed at the Port Side Shipyard to be taken care of until the future would find an appropriate purpose. There it is kept in honour by a select group of craftsmen, who depend for their subsistence on his legacy.

Statue of Ferdinand de Lesseps at the entrance of the Suez Canal (Credit: Google)
Statue of Ferdinand de Lesseps at the entrance of the Suez Canal (Credit: Google)

In 1956 it was not so much vandalism by the people that the statue was removed from public space.7 It was a statement by a public conscious government with history awareness that prevented further harm from mindless destruction. Now, over half a century later, we see more acts of iconoclasm to historical statues, and then in a so called civilized world… A lot of historical figures were children of their own time. And for sure, those times were not very civilized in hindsight. OK, I am history aware and enjoyed my history lessons. There I had to learn that the raids of the barbarians on Rome, the Crusades to occupied Jerusalem and the iconoclasm in our own Reformation era were to be condemned. So, imagine when a lot of historical figures were removed from the street by emotional destruction, would later generations not condemn us in turn? What I would find even worse, is that future generations would not be aware of the dark side of those old ages as there are no statues to remind them to it. Maybe we can reintroduce a penalty for those ‘heroes’ from their own days: ‘the pillory’9. Just as with all sentences, the penalty can only awarded by the government, or an appointed committee, not the public. If that fails, store them under the custody of people who take good care of them without reverence. And at least let the pedestal remain to remind people of their history. ‘Those who cannot remember the past are condemned to repeat it.’ (George Santayana)10

Possible implementation of a statue with a pillory sign?
Possible implementation of a statue with a pillory sign?

References

  1. Graduation Omar Karam: Rock Cutting The Egyptian Way, Discover Dredging
  2. Boundary Conditions for the use of Dredging Equipment, Lecture notes i82 A+B, prof. J. de Koning
  3. Violence and controversies during the George Floyd protests, Wikipedia
  4. The Ancient History of the Cutter Suction Dredge ‘10th of Ramadan’, Discover Dredging
  5. DTC – Think Global, Act Local, Damen Shipyards
  6. Port Sid Shipyard, Suez Canal authority
  7. Ferdinand de Lesseps, Wikipedia
  8. Mémoire sur la communication de la mer des Indes à la Méditerranée par la mer Rouge et l’isthme de Soueys (p.352), Google
  9. Pillory, Wikipedia
  10. George Santayana, Wikiquote

See also