FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1917
1917 - 1278.PDF
DECEMBER 6, 1917. bottom ends of the push rods, which work in steel cups inside the hollow, tappets, and it should be noted that the hardened steel rollers of the tappets are slightly off-set from the camshaft centres, and each pair of tappet guides is held in position by a steel bridge clamp. The dimensions of both the inlet and exhaust valves are the same, each valve weighing 1.25 lbs. The lift of the inlet valve equals 0.465 in., and lift of the exhaust valve equals 0.443 in. Clearance of inlet tappet equals 0.009 in., exhaust 0.015 in. Camshafts.—The hollow camshafts ea.ch run in three plain phosphor-bronze bearings, and are arranged inside the. top half of the crank chamber. The camshaft bearing bushes, which are hollow, are 53 mm. outside diameter, and are split on the cam- shaft axis and held together by wire rings on either side to allow the camshafts to be easily inserted in the crankcase. The bearings are located by grub screws screwed in from the outside of the crank chamber. The camshafts are driven by gears from the inter- mediate gear wheel which meshes with the crank- shaft distribution pinion, and arranged inside a casing formed at the rear end of the crankcase. The camshaft gears are bolted to the camshafts by drilled flanges, which provide a vernier adjustment for setting the camshafts. Half compression cams are arranged on the exhaust camshaft in the usual manner. The laternal move- ment of the floating camshaft is effected by a small lever at the rear end of the crankcase, which operates a two-start square thread screw of 24 mm. pitch. The camshaft is returned to its normal running position by a spring arranged inside the front end of the hollow camshaft. Further details of this half compression gear are shown in Fig. 11. The half compression cams open the exhaust valves at 350 E., and close at 220 L. ;'- ~"i •••; ' f - (To be concluded.) ..; v ,.,: . R.F.C. Prisoners in Switzerland. A PARTY of British prisoners of war who arrived in Berne from Germany on November 28th included the follow- ing R.F.C. officers :— Captain Briggs, Lieutenants Macintosh, Harvey, Pinder, Dalzell, and Russell. ' Escape of Flight-Commander Moon. IT is good news to hear that Flight-Commander Moon, R.N.A.S., who some months ago fell into the hands of the enemy in German East Africa, has rejoined the British forces. At the beginning of the year he was reported killed in action, but it was afterwards ascertained that his seaplane, which also carried Commander Bridgman, D.S.O., fell into the Mbumi River, owing to magneto failure. The two officers were washed out to sea on a raft, and Commander Bridgman died from exposure, but Flight-Commander Moon eventuallysucceeded in reaching the shore. Fatal Accidents. AT the inquest held at Southend on November 24th on Capt. C. W. Bruce, Gordon Highlanders, attached R.F.C., who was killed while flying at Rochford on November 22nd, a verdict of " Accidental Death " was returned. An inquest was held on November 30th on 2nd Lieut. J. C.Cunningham, R.F.C., who died in hospital on November 28th as the result of an aeroplane accident. It appeared thatLieut. Cunningham was making his final test before being passed for service oversea. In taking a turn he came intocollision with some trees. The aeroplane took fire, and he was so badly burned that he died in hospital a few hourslater. The jury returned a verdict of " Accidental Death." HOISTING HSR HOME,—Bringing a German seaplane into its hangar by means of a crane. 1278
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
