1842.] 



THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 



30o 



TABLE OF PROPORTIONS OF THE PARTS OF CLYDE MARINE STEAM ENGINES— CYONDERS. 

 All the figures which are not represented as feet or numbers are inches. 



Names of vessels 



Makers' names 



Diameter of cylinder 

 Length of stroke 

 Cylinder made with belt ? 

 Thickness of metal of belt 

 Number of steam openings into 

 Diameter of openings 

 Diameter over flange 

 Thickness of flange 

 Number of bolts in flange 

 Diameter of bolts 

 Thickness of metal of cylinder 

 Thickness of upper flange for 



cover 

 Breadth of flange 



Number of beads or rings on 

 cylinder 



Depth of rings 



Projection of rings 



Bottom of cylinder cast in ? 



Thickness of bottom 



Number of feathers on bottom 



Thickness of feathers 



Depth of feathers 



Breadth of bottom flange for 

 bottom 



Thickness of ditto 



Number of bolts in ditto 



Diameter of bolts 



Amount of projection of bottom 

 into cylinder 



Kind of joint 



Breadth of bearing or fitting ring 



Diameter of hole for boring bar 



Plug to fill hole put in from 

 outside ? 



Plug bow fixed 



Length of bearing, or fitting space 



Depth of socket for plug 



Thickness of socket 



Taper upon plug 



Number of keys for fixing 



Breadth of keys 



Internal depth of cylinder 



Height of bottom above sole plate 



Kind of joint of cover 



Projection of edge ring above 

 flange 



Breadth of edge ring 



Piece cast on cylinder supple- 

 mental to valve casing ? 



Thickness of metal of ditto 



Bosses cast on for bolts ? 



Number of bosses 



Thickness of metal of ditto 



Depth of ditto 



Diameter of bolts tapped in ditto 



Screwed at both ends ? 



Noz/.les cast on for escape valves "- 



Depth of port for escape valve 



Breadth of port for escape valve 



Breadth of flange over all 



Kind of joint 



Number of bolts in flange 



Diameter of bolts 



Escape valves where situated 



Breadth of bearing for diagonal 

 stay 



Horizontal length of ditto 



Perpendicular depth of ditto 



Bosses cast on bottom for hold- 

 ing-down i)o!ts ? 



Depth of bosses 



Thickness of metal of bosses 



Diameter of hole in boss 



British 

 Queen. 



36 



U 



U 

 5 



2i 



1^- 

 6 



6 

 H 



none 

 rust 



none 



none 

 none 

 none 

 none 

 none 

 none 

 none 

 none 



8 ft. 



3 ft. ( 

 gasket 



n 



yes 



yes 

 4 



M 



3 



n 



6!: 



6.V 

 12 

 rust 

 ij 



n 



in port 



12 

 13 

 IS 



yes 



n 



3i 



Dee and 



SOLWAV. 



Scott, Sin- 

 clair & Co. 



73 

 7 ft. 







no 

 none 

 none 

 none 

 none 

 none 

 none 

 none 



3i 



IJ 

 5 



3i 



none 



rust 



1^ 

 none 



none 

 none 

 none 

 none 

 none 

 none 

 none 

 none 

 8 ft. 7 

 10 

 gasket 



!■- 



no 

 none 

 none 

 none 

 none 

 none 

 none 

 none 



no 



10 



rust 



1 



in port 



lOi 



14 



24 



yes 



4 

 li 



2J 



Do.v Jdan. 



Girdwood 

 & Co. 



68 

 ti ft. 



yes 



li 

 2 



1 ft. 2 



1 ft. 11 



H 

 8 



li 



H 



n 



3J 



1 



8 



none 

 none 

 none 

 none 



none 

 none 

 none 

 18 



no 

 with keys 

 "li 

 94 



14 



ft. 



li 



9 

 10 



li- 



yes 



ves 

 4 



yes 

 no 



4 

 4 



1 



in port 



11 



11.V 

 10.J 



10 



IJ- 



Hecl.\ and 

 Hecate. 



Scott, Sin- 

 clair & Co. 

 60 

 5 ft. 9 

 no 

 none 

 none 

 none 

 none 

 none 

 none 

 none 



li 



li 

 3 



ves 

 U 

 1 circle 

 1 



n 



none 

 none 

 none 

 none 



none 

 none 

 none 

 14i 



no 

 with keys 



n 



6 

 14 



i; 



' tt. 



li- 

 1 



41 



gasket 



no 



none 

 no 

 none 

 none 

 none 

 none 

 none 



no 



4 

 4 



9i 



rust 

 5 



in port 



1 



10 



U 



18 



3k 

 IJ 



Devonshire 



&C'A5IBEIDGF.. 



Girdwood 

 & Co. 



55J 

 5 ft. 



yes 



li 

 2 



124 

 1 ft. 9' 

 U 

 6 



li 

 barely IJ- 



li 

 Si- 



yes 



li 



none 

 none 

 none 

 none 



none 

 none 

 none 



18 



no 

 with kevs 

 H 

 6* 

 U 

 If 



6 ft. 



li 

 6i 



8f 



gasket 



li 



IJ 



no 

 none 

 none 

 none 



yes 

 no 



rust 

 5 



4 

 4 

 9J 



1 



in port 



Oi 



m 



15i 



yes 



8J 



Bruges. 



Caird & Co. 



51i* 



no 



none 

 none 

 none 

 none 

 none 

 none 

 none 

 li% 



u 



3i 





30 



none 

 rust 



none 

 none 

 none 

 none 

 none 

 none 

 none 

 none 

 .) ft. I 



6i- 



gasket 



li 



li 



ves 

 ■3 



3 



li 

 yes 

 yes 



4° 

 9i 

 metallic 

 8 

 1 

 end of eylin. 



8 



11? 



yes 



Observatio.ns. 



The sizes of the British Queen given 

 are the sizes of the engines intended 

 jto have been put into that vessel by 

 I Messrs. Girdwood and Co.; but as 

 they failed before the engines were 

 finished, they were never finished at 

 all. These engines were to have had 

 two slide valves to each cylinder, one 

 on the side of the cylinder next the 

 condenser, and the other at the 

 opposite side of tlie cylinder. The 

 object of this arrangement was to 

 enable the engineers to handle the 

 engines easily and quickly : in start 

 ing or reversing only one of the 

 valves would have been used. The 

 condenser was situated beneath the 

 cylinder, and that is the reason why 

 the cylinder bottom is so much above 

 the sole plate. The space usually 

 occupied with the condenser was to 

 have been appropriated to Hall's con 

 denser, and the condenser beneath 

 the cylinder was to have been used 

 in the event of Hall's condenser be- 

 coming deranged, or not answering 

 as well as was expected. The main 

 pillars of the framing were to have 

 'been of malleable iron, fixed into 

 strong sockets on the sole plate and 

 cuttered through. 



The whole of tlie joints in th e recent 

 engines of Messrs. Miller and Raven 

 hill and .Messrs. ilaudslays and Field 

 are metallic, with one or two excep- 

 tions : but in Scotland this ^vstem 

 has not yet coaie into general use. 

 Not one of the engines the dimensions 

 of which are given in the table, is pro- 

 vided with an expansion joint in the 

 valve casing. The transverse joint in 

 some of them I)etween the cylinder 

 and casing on the level of the cylindet 

 cover, it is impossible to keep tight 

 for any consideraiile time, owing 10 

 the unequal expansion of the cylinder 

 and casing when the steam is up but 

 the engi)-,c not working. The grease, 

 too, that is apt to fall on the cylinder 

 flange, is unfavourable to a rust joint 

 in tliis position. The rust is de-oxi- 

 dized by grease remaining in contact 

 with it for a considerable time at a 

 [high temiierature. 



I The plan of completing the flat 

 portion of the valve casing above the 

 level of the cylinder cover by a sup- 

 plemental piece cast on the cylinder, 

 is, we think, the best. .Messrs. Mauds 

 lays' practice, in some of their recent 

 engines, is to make the flange of the 

 Ivalve casing range with the flange 

 'of the cylinder, ami then bolt to the 

 top of the valve casing a length of D 

 shaped pipe. This certainly is not by 

 any means a neat arrangement, nor 

 does it, we conceive, art'ord equal 

 stability to the cylinder faces, as the 

 mode of casting the flat part of this 

 supplemental piece upon the evlinder 

 itself. 



2 X 



