July 16, 1910.] 
FOREST AND STREAM. 
105 
Motor 'Boating . 
Motor Boat Fixtures. 
JULY. 
16. Crescent A. C., Marblehead to Bay Ridge. 
16. Columbia Y. C., relay race to Charlevoix. 
16. Taunton Y. C. 
16-23. Chesapeake Bay Y. R. A. 
18-24. Inter-Lake Y. A. 
23. Narragansett Assn., Newport to Cottage City. 
26. Holly Beach Y. C., race to Philadelphia. 
30. New England Engine and Boat Assn., races at 
Winthrop. 
31. New York Motor B. C. 
AUGUST. 
3. Bensonhurst Y. C., race to Narragansett Bay. 
4. Fall River Y. C. . 
4, 5, 6. Gold Challenge Cup races, Alexandria Bay. 
11. Fall River Y. C. 
13. Boston Y. C., Isle of Shoals and return. 
13. Dorchester Y. C. 
18. Fall River Y. C. 
20. British International Trophy race. 
20. New England Engine and Boat Assn., races on 
Charles River. . . 
21. Cleveland P. B. C., Ohio State Championships. 
25. Fall River Y. C. 
27. Dorchester Y. C. 
28. New York Motor B. C. 
SEPTEMBER. 
3. Atlantic Y. C. 
3, 4, 5. Taunton Y. C. 
4, 5. Larchmont Y. C. long distance race. 
5. Hudson River Y. R. A., Ossining. 
17. Taunton Y C. at Dighton 
Lloyd’s Rules for Motor Boats. 
The following is an advance copy of the rules 
for the survey of internal combustion engines 
for marine purposes which have been adopted 
by Lloyd’s Committee: 
GENERAL. 
Section 1. In vessels propelled by internal 
combustion engines, the rules as regards ma¬ 
chinery will be the same as those relating to 
steam engines, so far as regards the testing of 
material used in their construction and the fit¬ 
ting of sea connections, discharge pipes, shaft¬ 
ing, stern tubes and propellers. 
CONSTRUCTION. 
Section 2.—1. The following points should be 
observed in connection with the design of the 
engines: 
2. The shaft bearings, connecting rod brasses, 
the valve gear, the inlet and exhaust valves 
must be easily accessible. 
3. The reversing gear and clutch must be 
strongly constructed and easily accessible for 
examination and adjustment. 
4. In engines of above 60 B.H.P. which are 
not reversible and which are maneuvered by 
clutch, a governor or other arrangement must 
be fitted to prevent racing of the engine when 
declutched. 
5. Efficient positive means of lubrication 
(preferably sight feed) must be fitted to each 
part requiring continuous lubrication. 
6. If the engines are of the closed-in type, 
they must be so fitted that the contained lubri¬ 
cating oil can be drained when necessary, and 
in wood vessels an easily drained metal or 
metal-lined tray must be fitted to prevent leak¬ 
age of either fuel oil or of lubricating oil from 
saturating the wood work. 
7. Carburettors, where petrol is used, and 
vaporizers, where paraffin is used, should be so 
designed that when the engine is stopped the 
fuel supply is automatically shut off. If an over¬ 
flow is provided in the carburettor or vaporizer, 
a gauze-covered tray with means of draining it 
must be fitted to prevent the fuel from flowing 
into the bilges. 
Strong metallic gauze diaphragms should be 
fitted either between the carburettor (or vapo¬ 
rizer) and cylinders or at the air inlets. 
8. If the ignition is electric, either by mag¬ 
neto or by coil and accumulator, all electric 
leads must be well insulated and suitably pro¬ 
tected from mechanical injury. The leads 
should be kept remote from petrol pipes, and 
should not be placed where they may be 
brought into contact with oil. 
The commutator must be inclosed; and the 
sparking coils must not be placed where they 
can be exposed to explosive vapors. 
9. No exposed spark gap should be fitted. 
10. In paraffin and heavy oil engines where 
lamps are used for ignition or for vaporizing, 
these lamps should be fixed by some suitable 
bracket, and the flame inclosed when in use. 
11. The circulating pump sea suction is to 
have a cock or valve on the vessel’s skin placed 
on the turn of the bilge in an, easily accessible 
position, and the circulating pipe is to be pro¬ 
vided with an efficient strainer inside the vessel. 
The discharge overboard is to be fitted with a 
cock or valve on the vessel’s skin if it is situ¬ 
ated under or near the load line of the vessel. 
12. A bilge pump worked by the engines or 
an independent power-driven bilge pump is to 
be fitted, to draw from each part of the vessel. 
In open launches this bilge pump may be 
omitted provided suitable hand pumps are fitted. 
13. The cylinders are to be tested by hydraulic 
pressure to twice the working pressure to 
which they will be subjected. The water jackets 
of the cylinders to 50 pounds per square inch 
and the exhaust pipes and silencer to 100 
pounds per square inch. 
14. i he exhaust pipes and silencer should be 
efficiently water-cooled or lagged to prevent 
damage by heat, and if the exhaust is led over¬ 
board near the waterline, means must be 
arranged to prevent water from being syphoned 
back to the engine. 
15. The machinery must be tried under full 
working conditions, the report stating the ap¬ 
proximate speed of vessel, the number of revo¬ 
lutions of the engines at full power, both ahead 
and astern, and the lowest number of revolu¬ 
tions of the engines which can be maintained 
for maneuvering purposes. 
RULES FOR DETERMINING SIZES OF SHAFTS. 
Section 3. The crank, intermediate, and 
other shafts if of ordinary mild steel are to be 
of not less diameters than as given in the fol¬ 
lowing table. When special steel is used, the 
sizes are to be submitted for consideration. 
1. For petrol or paraffin engines for smooth 
water services: 
Diameter of crank ) _C’VITS 
shaft in inches ) 
where D = diameter of cylinder in inches, 
ARTHUR BINNEY 
(Formerly Stewart k Iinkit) 
Naval Architect and Yacht Broker 
Mason Building, Kilby Street. BOSTON. MASS. 
Cable Addren, ' Designer," Bostoe 
COX ®l STEVENS 
Yacht Brokers and Naval Architects 
IS William Street, - New York 
Telephone* 1375 aad 1376 Broad 
GIELOW (Si ORR 
Naval Architects, Engineers and Yacht Brokers 
Plans, Specifications and Estimates furnished for Construction, 
Alteration and Repairs. Large list of Yachts for Sale. 
Charter or Exchange; also Commercial Vessels. 
52 BROADWAY Telephone 4673 Broad NEW YORK 
To Yachtsmen. 
Yachtsmen cruising Labrador Coast, north of 
Battle Harbor, can be supplied with Scotch Coals, Pro¬ 
visions and Whale Meat at Whaling Station, Hawks 
Harbor, Labrador. Marconi Station at Venison Island, 
three miles distant. Sufficient water for largest steamer 
to lay alongside company’s wharf. Sea trout in abun¬ 
dance, splendid drinking water free. Address Labrador 
Whaling and Mfg. Co. Head office: Saint John’s, 
Newfoundland. 
I Write for oomplete catalog today-tells all about how these high grade motors are built In 
the LARGEST PLANT IN THE WORLD devoted exclusively to the manufacture of 
2-cycle motors. CRAY MOTOR CO., 22 L©lb St., Detroit, Mich. 
CORRESPONDENCE. 
S = stroke of piston in inches. 
2-stroke 
4-stroke Cycle. Cycle. 
For 1, 2, 3, or 4 Cyls.l or 2 Cyls. 
“ 6 “ 3 “ 
“ 8 “ 4 “ 
“ 12 “ 6 “ 
Bearing Two Cranks 
between between the 
each Crank. Bearings. 
C = .34 C — .38 
C = .36 C = .40 
Ca=:.38 C = .42.5 
C = .44 C = .49 
The Forest and Stream is the 4 recognized medium of 
entertainment, instruction and information between Amer¬ 
ican sportsmen. The editors invite communications on 
the subjects to which its pages are devoted. Anonymous 
communications will not he regarded. The editors are 
not responsible for the views of correspondents. 
SUBSCRIPTIONS. 
For open sea service add .02 to C. 
Diameter of inter-] _ 
mediate and screw f=C 3 VD 5 S (n -j- 3) 
shafts in inches J 
where D = diameter of cylinder in inches, 
S = stroke of piston in inches, 
n j= number of cylinders. 
For smooth water services: 
C = .155 for intermediate shafts. 
C = .i7o for screw shafts fitted with continu¬ 
ous liners. 
C = .i8o for screw shafts fitted with separate 
liners or with no liners. 
For open sea services: 
C = .i6 5 . 
C = .180. 
C = .190. 
In engines of two-stroke cycle, n is to be 
taken as twice the number of cylinders. 
2. When ordinary deep thrust collars are used 
the diameter of the shaft between the collars is 
to be at least 21/20 of that of the intermediate 
shaft. 
3. In the cases of Diesel and other engines in 
which very high initial pressures are employed, 
particulars should be submitted for special con¬ 
sideration. 
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FUEL TANKS AND CONNECTIONS. 
Section 4.—1. Separate fuel tanks are to be 
tested with all fittings, to a head of at least 15 
feet of water. If pressure feed tanks are em¬ 
ployed, they are to be tested to twice the work¬ 
ing pressure which will come on them but at 
least to a head of 15 feet of water. If the tanks 
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FOREST AND STREAM PUB. CO. 
127 Franklin St., New York. 
