New-York tribune., 1907-01-05
MOTOR BOATS TO BE WEIGHED.
Important Changes in the American Power
Boat Association Racing Rules.

number Of changes of interest to all motor
poat owners were made IN the racing rules Of the
American Power Boat Association at It's semi an
nual meeting. on Thursday night The principal
changes include the weighing OF all boats entered
Tor the Gold Challenge Cup races. IN all other
races 1t Is LEFT optional with the race committee
to have the boats weighed measured.
Section OF Rule is amended by inserting this
clause: "Or the mdshp section may be obtained
oy multiplying the actual weight of the boat In
pounds. Plus 300 pounds for weight of crew. by a
constant and divided by the load water line In
.eet the constant for sea water being oo2sA and
Tor fresh water 0d23L"
Section Of the same rule provides that sasoiene
explosive engines are TO be calculated by multi
plying the area OF piston IN square tnches nv
the number Of pissons receiving direct explosions
and dividing by a constant
Inc constant In automobile racing boats, the rule
says, shall be for fourcyce engines Les for two
cycle engines having six inches stroke or over end
ioF two-cycIe engines having less than six inches
stroke OF piston In all other boats the horse pov.r
shall be taken at twothrds OF that given for auto
mobile racing boats. In four-cycle engines having
compression cylinder any device for forcing
the mixture into the working cylinder the horse
power rating shall be increased 10 per cent In
four-cycle engines having a compound or erns,-
sion cylinder or cylinders 20 per Of the piston
area OF such cylinder cylinders be added to
the area OF the high pressure working cylinders
ana then divided by the regular constant
In two-cycle engines having a compression cvt,n-
DER or cylinders the horse power shall be auR.ntsd
oy the ratio that such cylinder column bears 10 the
volume OF the working cylinders. volume being de-
termined by piston area multiplied by stroke In
t~o-cycie engines. where some rotary compressor
Is used' the constant shau be onc-haR of that for
four-cycle engines
, The new Section of Rule IL made to nrov,t.
ihat When the measurer has reneasured a boat the
last result as reported by him shall be ANAL nav
secton IN Rule provides that where a boat bv
reason OF the difference IN rating for horse nop,er
petween automobile racing boat and cruiser rates in
both classes she shall be classed as an automobila
racing boat
=, Section l. Rule 8, was amended so as to read
that boats should be rated for classification and
lrne allowance, which rating should be determined
oy taxing eighteen times the cube root OF the
square root Of the load water line, multiplied by
ne horse power and divided by the area OF the
The secretary was directed 10 proceed IN tha
regular way TO obtain the consent to the change in
the oeed OF gift OF the Challenge Cup to readt
Ihat the match should be managed by a com
mlttee OF three judges. to be selected by the
challenged club, one by the challenging club and
te fhlrd TO be chosen by the executive committee
OF the American Power Boat Association Such
member should not be member Of either of the
challenged or the challenging clubs. Previously
this third member was selected by the two former
members of the committee
Section Of article provides that boats must be
measured, previous to the match by a measurer
selected by the managing committee and approved
py the measurer Of the association; and section %
or the same rules states that in computing points
me maximum number OF entries should be deemed
racing each day, and those that not STAT shall
De counted as defeated boats.