Savannah morning news. [volume] (Savannah) 1868-1887, 1885-02-01
NEW IDEAS n SHIP BUILDING.
How Capt. LundbOrg Proposes to Sc
cure Speed, safety and Comfort.

How Capt. LundbOrg Proposes to Sc
cure Speed, safety and Comfort.
At a meeting of the American Yacht
Club last evening, says the New York
Times of Jan. 81, UaPt: Z: 9. Lundborg,
retired naval officer, delivered an address
on improvements in shipbuilding, de-
signed to secure greater speed, safety,
comfort and carrying caracity. Capt.
Inndporr said that he had been led by
observ alton Of the fin whale and other
Ssh swimming beneath tae surface of
water, with great Tapidity and apparent
little effort. 10 suspect that the plane OF
greatest resistance in water was at its
surface. His own experience in swim
ming strengthened the opinion, and expert
ments Of various kinds eventually con
WINGED him that such was the fact. He
subsequently discovered taat his conclu-
sions were fully confirmed by the expert
ments of Col. Beaufoy, who was employed
during the latter part Of the last century
to investigate the subject for the British
Government. The result of his researches
are recorded in a book prepared after his
death by his son, only very few copies
of which were issued.
Capt. LuudbOrg exhibited models of his
designs. which threaten to create new
departure in shipbuiiding. On the Prin-
chile that water oilers greatest resist
ance at its surface. he would construct
ship that would have its least dimensions
at the water line and It's
greatest beam below the water,
and the sides Of which, instead OF
being constructed with somewhat convex
5c & ruiz 0f hnf n in
shipbullding, would have strongly defined
conoave vertical lines. The bottom also,
instead of being very nearly round.
would be very nearly fiat. The Captain
exhibited two models-the larger one of
ship to be 400 feet long, whose breadth be-
low the water line would be 6S feet, at the
water line 60 feet, and at the deck line Ga
feet; depth. "A feet; draught Of water, %
feet, and displacement 1867 tons. This
ship. which would be about the same di-
mansions as the Cunarder Servia, except
that she would be p feet shorter and have
IS feet more beam, would have over I,3UO
tons more carrying capacity.
The Captain said that, while any exist
inc ocean steamship would upset if her
cargo and ballast were entirely taken out
of her, a ship constructed on his model
could not. by the nature of her build, be
unset under any circumstances. She
I
water on her cOncaye sides would steady
/ her. and she would also pitch much less,
while as to speed she would average at
/ sea at least q 10 y knots per hour, and
/ be able to cross the ocean in from five to
| five anG a half days. He would also Sc
/ cure greater power by having two prOpel-
! lers instead of one. The difficulty here
/ tOfOre in the way of utilizing two pTopel-
lers has been the problem Of furnishing
adequate support for the heavy shafts, y
TO 40 inches in diameter, required IN ocean
navigation, which must necessarily eX-
tend 40 TO 60 feet astern of the hull. Capt.
Lundborg proposes to solve this problem
by extending the heel of the hull under
water beyond the stern above water and
having the screws work iushlwith the end
of it, putting one on each side OF the mid
ship line. This arrangement would Sc
| cure the further advantage of placing the
screws so deep under water that they
would never. in the pitching of the ship
rise above the surface and be subjected 70
the consequent loss of power. A bill is
now before Congress for an appropriation
to construct an experimental ship on
| Capt. LANDLORDS designs.