The Sun.
London, England, 1867-05-13 00:00:00

MEASURED MILE.-FULL BOILER POWER

First Run.—'l'inie, 4 min. 6 sec. ; speed of the
ship, 14.631 knots ; revolutions of engines, 61-5.
Second Run.—Time, 4 min. 18 sec. ; speed of
ship, 13-953 knots; revolutions of engines, 61-5.
Third Ilan.—Time, 3 min. 58 sec. ; speed of
ship, 15.126 knots ; revolutions of engines, 62-5.
Fourth Run.—lime, 4 min. 30 sec. ; speed of
ship, 13.333 knots ; revolutions of engines, 61-5.
Fifth Run.—Time, 3 min. 53 sec. ; speed of
ship, 15.450 knots ; revolutions of engines, 62.
Sixth Run.—Tinie, 4 min. 35 sec. ; spied of
ship, 13.043 knots ; revolutions of engines, 61-5.
Steam pressure, 251 b. ; vacuum, mean, 25in. ;
mean speed of the ship with full-boiler power,
14.357 knots ; indicated horse power of the en-
gines, 6,956.

HALF BOILER POWER.

First Run.—Time, 4 min. 20 sec. ; speed of ship,
• 13.846 knots ; revolutions of engines, 49.5.
Second Run.—Time, 6 min. 8 sec. ; speed of
ship, 9.783 knots ; revolutions of engines, 50.
Third Run.—Time, 4 min.l.9 sec. ; speed of ship,
13.900 knots; revolutions of engines, 49.5.
Fourth Ruu.--Time, 6 min. 14 sec. ; speed of
ship, 9.890 knots; revolutions of engines, 50.
Mean speed of the ship with half boiler-power,
11.897 knots.

As soon as the ship had her last run with
half-power over the mile she was steamed out from
~pithead until outside the Nab Light, and with
Dunnese-held broad on her beam, when she was
put through her circling exparhnents, there not
being sufficient space for the purpse between the
shoals inside the island. Two circles were first
taken with full-boiler power :
Helm aport.—Relieving tackles on the tiller with
60 men, 30 on each side. Men at wheel, 18. Helm
up in 1 min. 7 sec., 31 turns of wheel ; angle of
rudder, 40 deg. Half-circle made in 3' min. 21 sec.
Full circle, 7 min. 19 sec. Revolutions of engines
on circle, 55.
Helm to starboard.—Without the aid of relieving
tackles.—Men at wheel, 18. Helm up in 2 min.
20 sec., 21 turns of wheel. Angle of rudder, 23
deg. Half-circle. made in 3 min. 50 sec. ; full circle
in 7 min. 38 sec. Revolutions of engines on
at
three
circle, 55.
Hydraulic steering Apparatus.—Three
sec., menree
the; upper deck lever. Helm up in 31
turns of wheel. Angle of the rudder, 33 deg. to 37
deg. Half-circle made in 3 min. 39 see. ; full circle
in 7 min. 4 sec. ; revolutions of the engines on the
circle, 55. With half-boiler power the half-circle,
helm to port, was male • in 3 min. 21 sec., and the
full in 6 min. 41 sec. With helm to starboard
the time was, half-circle, 3 min. 52 sec. ; full,
7 min. 38 sec. The last experiment made was
in
testing the action of the engines in answer to
any sudden and unexpected order. , They were
stopped from full speed ahead •in 13 seconds,
started ahead to full speed in 19 seconds,
and reversed to full speed astern in 11 seconds.
This concluded the day's trials. The magnificent
machinery of the ship acted
.perfectly from first to
last, and in a manner that must be highly gratify-
ing both to the contractors and the Admiralty. The
temperature was very high below, the f we stokehole
thermometer recording from 135 deg. to their maxi-
mum point, 142 deg. The after stokehole was 120
deg. to 135 deg.., and the engine-room reached 108
deg.
The ship was under the command of Capt. Jamcs
G. Goodenough, fiat,- captain to bear- Admiral F.
Warden, C. 8., but the trials were made under the ;
superintendence of the Captain of the Steam • Re-
serve of the port. Mr. J. Harding,
Trinity and
Queen's pilot, piloted the ship. Mr. Mathews and
Mr. Anderson, of the firm of John Peadnn and Son,
the makers of the ship's machinery, Dial
charge of
the engines during the trials. Mr. E. J. Reed, the
Chief Constructor of the Navy, was on board dur- ,
ing the full-boiler power trials over the measured
mile. The Minotaur anchored at Spithead after
her trials had been concluded for the night, but on
Saturday morning, soon after daylight, she steamed
into Portsmouth harbour again to complete some
fittings by the shipwright department, &C., prepara-
tory- to entering actively upon her duties as the flag-
Channel squadron for 1867,
ship of the British