Nemo ® 14-Авг-2022 18:08

Marine Conversions (Vehicle engine conversions for boats)


Year: 1985
Language: english
Author: Nigel Warren
Genre: Technical book
Publisher: Adlard Coles
Edition: 2
ISBN: 0-229-11770-8
Format: PDF
Quality: OCR with errors
Pages count: 199
Description: In this new edition of Nigel Warren's unique guide to marinising
vehicle engines, the book has been brought thoroughly up to date
on new techniques, new engines available (like the Golf Diesel)
and new suppliers of equipment. Diesel engines feature more
prominently in the book and new sections deal with corrosion,
horsepower ratings, rubber mountings and pipe sizes, to name
but a few.
As before, invaluable advice is given on all aspects of conversion -
from electrics to propellers.
Nigel Warren received a degree in Naval Architecture from
Newcastle University, and served his apprenticeship at
Thornycrofts in Southampton. After three years at the Hydraulics
Research Station, Wallingford, he rejoined Vosper Thornycroft at
Portsmouth , subsequently moving to Vosper Hovermarine at
Southampton, and then Fairey Marine at Cowes.
He has completed several boats of his own and now owns a
28-foot motor sailer; he is the author of SMALL MOTOR
CRUISERS, which is also published by Ad lard Coles Limited, and
two other books in the same field.

Contents

Contents
Foreword
Introduction
1General Ideas
Suitable engines Sources Recommended practice
2 Engine
Ancillary equipment Testing
3 Cooling 15
Radiator and fan cooling Direct cooling Seawater
pumps Water-cooled manifold Exhaust injection and
exhaust pipes Dry exhausts Seawater piping (direct
cooling) Heat exchanger cooling All fresh water cooling
Oil coolers Keel coolers Engine enclosures Pipe size
4 Gearbox 45
Methods of conversion Using the third gears as driving
gears Using the second gears as driving gears Chain
drives Chain around the second gears Other
methods Choice of method Two speeds ahead Chain
selection Conversion Clutch Propeller thrust Oil seal
5 Mounting and Drive 69
Thrust bearings Universal and flexible drives Flexible
coupling and flexible stern tube Solid mounting Other
drives Vee-belt and chain drives Propeller shafts
Rubber mountings Saildrives Twin and Wing
Installations
6 Tank and Feed 88
Gravity vs pump feed Safety
7 Electrics 93
Circuits Batteries and generators Cables Diesel starting
Petrol engine HT systems
8 Controls and Instruments 100
Clutch and gear lever Throttle Instruments Marine
equipment
9 Diesels
Overhauling Cooling Gearbox Mounting and noise
Fuel supply Electrics Turbocharging Current popular
diesel for marinisation
10 Propeller 115
Choosing a propeller Reduction ratios Cavitation Stern
gear Propeller tables Propellers for yachts
11 Noise
Practical details Extractor fan Engine cassettes and rafts
12 Conversion to Paraffin 148
13 Actual Conversions and Installations 153
BMC 948 cc A type (A40) Austin 7 Ford 122E VW
3½ litre Morris Commercial Ford lO0E BMC 2.2 diesel
BLMC 1.5 diesel Golf diesel
14 Corrosion
Stainless steel Laying up Galvanic series
Appendices 169
A Suppliers of marinisation kits and equipment Horsepower
B Weights and Measures
C Literature
D Engine oil classification
Ust of Illustrations
1 Through-flow ventilation 17
2 Improving the flow of air through the radiator 18
3 The simplest direct cooling system 20
4 Hand control of temperature 21
5 Thermostatic control of the temperature 21
6 Fabricated welded water-cooled manifold 24
7 Simple exhaust layout 26
7A Water lock system 27
7B Elevated water injected silencer 28
8 Basic heat exchanger cooling 30
9 Usual heat exchanger circuit Engine fitted with marine gearbox
and oil coolers 31
10 Simple heat exchanger made from brazed copper tube and
sheet 33
11 More efficient heat exchanger made from brazed copper sheet 34
12 A fully fresh water cooled circuit 36
13 Oil-cooling pipe in sump 37
14 Keel cooler circuit 39
14A Tank cooling, shallow with baffles 41
14B Friction losses in pipes 43
15 Typical car gearbox 49
16 Conversion by driving layshaft through 3 rd gears 51
17 Obtaining reverse using the 1st/2nd gear selector 53
18 Conversion by driving layshaft through 2nd gears 54
19 Conversion by means of chain giving 1 : 1 ahead and astern 55
20 Conversion by means of chain giving approx 2½ : 1 ahead and
astern 56
21 Conversion by means of chain giving approx I½ : 1 ahead and
astern 57.
22 Chain drives 61
23 One handed clutch and gear lever operation 63
24 Single lever operation of gears and clutch 64
2S Propeller thrust guide 65
26 Example of a well retained aft-end ball bearing 66
27 Using car-type components for a flexible drive 70
28 Marine mounts, flexible coupling and flexible stem tube 70
2 9 One method of supporting the engine on its rubber mounts 71
viii
30 A way of draining the engine and gearbox oil when installed
in a boat 72
31 Basic capacity of light-type ball bearings fitted in a plummer
block 73
3 2 Load capacity of double tapered roller bearings set in a
plummer block 74
33 Solid mounting and drive 77
34 Standard vee-belt drives 83-4
35 Tank, petrol pump and feed system involving a large tank 88
36 Simple gravity feed 90
3 7 Basic electrical circuit 94
38 Charging circuit with alternator 95
3 9 Cable ratings 97
40 Simple remote control for 1st/2nd or 3rd/4th gear positions 100
41 A good layout for the controls l 0 l
42 Fuel system layout with DPA injection pump 109
43 Fuel system layout with an in-line injection pump 110
44 Diesel starter keylock switch 112
45 Curves for speed estimation; displacement boats 115
46 Curves for speed estimation; planing boats 116
4 7 'Wake' reductions for use with the propeller tables 117
48 Guidelines for choosing a sensible engine power 119
4 9 Minimum propeller shaft diameters 124
49A Propeller apertures 125
50 A rigidly mounted engine 138
5 1 Using the engine bearers and hull bottom to form part of the
engine 'capsule' 140
52 The three basic ingredients of noise reduction 141
53 The complete soundproofed installation 143
54 Simple noise trap 144
54A Lay-up of noise-reduction material 146
55 Using SU electric pumps for paraffin conversion 151
SSA Paraffin vapouriser box conversion 151
55B Alternative paraffin conversion 152
56 Up-and-over chain drive 155
57 Raised drive using vee-belts 158

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