Dave Gerr - Boat Mechanical Systems Handbook-How to Design, Install, and Recognize Proper Systems in Boats
xix USING DECIMAL EXPONENTS Decimal exponents are used in a number of the formulas throughout this book. If you “don’t like math ...
xx happen to fall exactly on even powers or roots, such as square or cube roots. In the case of Formula 24-4, the data show that ...
xxi We shook our heads in unison. One million for a 50-footer (15.2 m)! It wasn’t that we weren’t both proud of our custom creat ...
xxii That was it! The Seabreezehad an icebox, not a fridge. Water was supplied by hand pumps, one at the galley sink and one in ...
xxiii Finally, the central mechanical system in any boat could be considered the engine that provides the power to drive it. As ...
This page intentionally left blank ...
Part One DRIVETRAIN INSTALLATIONS CHAPTER 1 An often overlooked aspect of small-craft engineering is the drivetrain: all the com ...
Blade Area Naval architect Uffa Fox said: “The final answer to all engineering effort in any vessel is in the propeller.” This i ...
Chapter 1: Propellers and Shafts Cavitation Propellers drive a boat forward because their blades act as hydrofoils as they are r ...
get. There are some sources for custom 6-bladed, 140 percent DAR props, but that’s truly the max. If you need still more blade a ...
Common Causes of Vibration and Noise Cavitation due to inadequate blade area is— as we’ve just seen—one common cause of vibratio ...
the prop.) A more accurate method is to record the vibration or noise on a small cassette recorder, using a contact mike capable ...
Incorrect pockets can generate consid- erable noise. The most common problem is that the pockets are too short fore-and- aft, wi ...
PART ONE: DRIVETRAIN INSTALLATIONS Figure 1-8A. Pocket viewed from the stern (rear) Figure 1-8B. Pocket viewed from starboard. T ...
Propeller Shafts: Diameter, Bearing Spacing, and Bearings Of course, the propeller shaft itself has to be properly sized and sup ...
that if more detailed calculations give you a significantly smaller diameter, you should check with the prop manufacturer to be ...
Though one may follow ABYC’s one- fifteenth rule, I have questions about it. For instance, given a 30-foot-waterline (9.14 m), 1 ...
or Where Ds =shaft diameter, in. or mm E =modulus of elasticity of shaft mate- rial, psi or MPa (megapascals; 1 MPa = 1,000,000 ...
Bent Shafts Oh yes, shafts can be bent, too. If you sus- pect this, the simplest way to check is to back off the coupling from t ...
additional intermediate shaft bearings. Their required locations are governed by the shaft-bearing spacing we just reviewed. The ...
«
1
2
3
4
5
6
7
8
9
10
»
Free download pdf