AMERICAN LEGION CLASS. 203 
Society data (1) as to the fire-room temperatures of these vessels which are being operated 
by the Munson Line under his direction, and (2) supply a statement of the condition of the 
gears. We all know that at 18 knots speed the gears are heavily loaded, and it seems that 
to complete this paper such data would be of the greatest value. 
I would state that on the President Cleveland the power was measured by Hopkinson- 
Thring torsion meters, and as far as we can see from the tabulated data, the results corre- 
spond quite closely to the other vessels. 
Mr. Rosertson :—In reply to Mr. Bailey’s inquiry, I would say, in regard to fire-room 
temperatures, that in the last two ships, Pan America and Western World, it was decided to 
run on natural draft under ordinary conditions, and the changes involved have reduced fire- 
room temperatures about 40 degrees below those in sister ships. This change is therefore 
also contemplated for the American Legion and Southern Cross. 
The reduction gears in all four ships are standing up perfectly, and with the excep- 
tion of one pinion, none of these gears have required attention. The one pinion referred 
to was somewhat noisy and was rehobbed when the ship was being overhauled. 
Mr. Warriner:—In the first place I wish to thank those gentlemen who have taken 
part in the discussion of the paper and will endeavor to give the additional information 
requested. 
Mr. Bailey has presented a tabulation of the trial results on five of these vessels. 
In the case of the President Pierce, the water rate is uncorrected. There is some doubt 
as to the steam temperature at the turbine steam chest, but assuming similar conditions to 
the other ships, the water rate for the starboard turbines corrected to 250 pounds gauge 
chest pressure, 75° F. superheat and 2” Abs. vacuum would be— 
Pounds 
ull powers crccsrys thereat aking sessel 5 eis su narhoiA wicvaua aie asta Gaur ees 10.3 
Intermediates powetanrrrcccac ein ccc ones tins watatosamle une are ne 10.92 
OWE POW ELM a PURE A ancl Ae cae) wut acne ee ln aes sat ahaa. 175 
These turbines were designed to meet a guaranteed water rate of 11 pounds. Those for 
the President McKinley and also for the President Cleveland and President Jackson were de- 
signed for a guaranteed water rate of 10.5 pounds per shaft horse-power. 
On the trials of the President Pierce the blowers were located over the backs of the 
boilers. They were changed to over the fire rooms with a considerable improvement in the 
fire-room conditions. As mentioned in the paper, the last two ships were fitted with Dahl 
burners and are operating continuously on natural draught, the air coming down right in 
the middle of the stokehold, which makes them quite comfortable and allows of easy oper- 
ating conditions. 
Full particulars of the gearing on these ships were given in my paper, “Reduction 
Gears for Ship Propulsion,” Transactions of the Society of Naval Architects and Marine 
Engineers, 1921. 
The solid steel gears are quite satisfactory and give every indication of being a lasting 
proposition. We have fitted a large number of this type, manufactured by the Falk Com- 
pany, and so far have had no failures. 
It is believed that these solid gears, when properly cast and when made of the right 
