Resistance and Powering Design
How big to make the engine? That innocent question reveals a complex field of study. Resistance and powering require multiple methods of calculation to obtain an accurate prediction for engine size.
This typically consists of two stages:
- Resistance estimate
- Propulsion design
Regarding resistance estimates, DMS has multiple methods available for a range of accuracy and budget needs.
Propulsion design consists of selecting the best propeller size. This requires determining the blade pitch, blade area, and other geometry features. The ultimate goal is peak efficiency, but the engineer must also consider cavitation, vibration and noise, operational profile, engine matching, and several other factors.
Want to Learn More?
We are happy to discuss your next project. We can customize each project to meet your exact goals.
We also offer free general project plans to help prepare for your next round of quotes.
At DMS, we are dedicated to your success.
Relevant Ship Science Articles
A refined hull shape epitomizes the link between tradition and science. When we link the science of ship design with the experience of past ships, we identify the successes and isolate previous failures. This article glimpses into the background of hydrodynamics by exploring the link between the science of Bernoulli’s equation and the shape of ship hulls.read more
Axe bow, X-bow; slim size, thin size. We currently enjoy an explosion of variety in bow shapes, each suited to a different task. These may all look the same with a cursory glance, but don’t get fooled. Nearly the same bow shape, used on a different vessel may work...read more
Monohull, catamaran, trimaran . . . so many choices. Which hullform to pick? Can we draw upon any science to guide our choices, or shall we beg Lady Luck to guide us? Although hullform selection does involve some experience and artistic preference, naval architects...read more
ZOOM!!! No better way to describe planing boats. They pack very fast speeds into a very small package. Many planing boats achieve speeds well beyond the limits of larger craft. How do they do it? And what are the penalties for this extreme speed? Discover if a...read more
Hull speed is bogus, but not because the math is wrong. This formula supposedly predicts the maximum speed of a yacht based solely on length. It gets discussed frequently in sailing yacht communities. Surprisingly, hull speed is partially correct, with a very...read more