New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1852-11-02
Duplex Rud6er and screw Propeller.
Under the above title Captain E. ]. Carpeu

nOtT INC ABOVE tltle captain Il. y. CdTpcu
ter NJ has patented invention in the art of propc
ling vessels by screw which bids fair constitute
era in steam navigation. Vessels propelled by screw
ere indeed no longer novelty but the popularity Of
Captain Carpenter invention H. that two screws are
made OF instead of one which greatly increases the
speed while the ship Is stored by rudders which
IN equal degree increases the control obtained over
her In order to obtain these results Captain Carpenter
builds his vessels principle different from any that
has hitherto been adopted From the stem TO tho mid
,hips section the keel is laid down the in other
vessels but from The midships toward the stern the
keel gradually tapers off till il is lost in he water line
But in place Of this single keel two new tes start from
the midshps and continued in parallel lines
10 the stern, the distance between them varying
Of course, according TO tie size oil the vessel
Each Of these kcels il fitted with sernpost ana ru-
der and between the keel and the sternpost OF eacn
there is orfce, in which the screw WORKS according
TO the common principle. One screw pfopeuer If p'aC'
cd little in advance of the other, 20 TO allow both
room TO work and yet near that when both are III
action, they constitute in fact one propeller wh double
mower Tho two TlddeTs connected tOgetherChaI
fhey can be seered by person easily NJ the single
rudder on the old principles while by slight alteration
in the machinery, Of the screws or one OF the rud
ders can be unehpped at pleasure and TIE vessel work
ed with one only BY this principle the inventor
calculates On obtaining not only increase OF speed
which may obviously be expected from the double action
of the Screws but also having greater control over
the way Of the vessel by the action OF the double ruddcr
and from experiments obtained from working model,
II appeared that vessel constructed on this principle
would completely round in the space OF her own
length and half while the Thames steamboats, usually
require a circle the diameter of Which is between
Eve and six times the vessels length, IN which to
rrn completely round under similar circumstances.
The form OF the vessels stern also gets nd OF oil dead
water which has usually been great impeachment to the
scon of the screw and the breadth OF the vessel and
stern which is rendered necessary by TIE double keel
gives an opportunity for mpaTtng increased strength to
that part of the ship where il il much wanted IN screw
steam vessel the time that, being propped up
as IL were the cruches of her double keel she
will be lcss likely TO roll in the water.
An opportunity has now occurred which wHl give
Captain Carpenter the of showing the advantages
oY HE invention scale which will probably be admit
ted as decisive Captain Leyland has c0mul stoned
tender FOR bis yacht TO be built and fitted w on Captain
Carpenters principle and the little vessel is now in
course of construction ut Mr. Greene building yard al
Orchard House, Blackwell
At present only the framework il laid down, so that
ell who are curious in these matters have admirable
opportunity of seeing the skeleton ms twere OF the YES
sell and Of asccrtanng for themselves not only the pc
ouiar shape Of the vessel, but OF the eXSaordiney
strength which il capable Of being impaired 70 emps
built upon this principle well as the greater anouns
OF stowagc that is obtained compared with ships built on
TIE ordinary principle The vessel IL to be rugged as
schooner for the be removed at pleasure,
and the tender used entirely sailing vessel she -
expected to be ready for in about fortnight ana
when ready for sea Will doubtless excite much attention
among gentlemen interested in the principles OF ship
budding and ateem navigation. lLondon Daily News