|
| Author |
Message |
    
searcher
Senior Member
Username: searcher
Post Number: 258
Registered: 10-2004
| | Posted on Monday, September 15, 2008 - 09:29 am: | 
|
This engine was built in the Craig shop in New York, 1904, for the launch Onontio. (From the November 1904 issue of The Rudder)
8 cylinder, make and break, four cycle, center flywheel, skeleton frame, 175 hp at 650 rpm, manganese bronze bedplate, copper exhaust and intake pipes, bronze fittings, brass piping. Depending on the work load, four of the cylinders could be engaged or disengaged as needed. The dynamo sits on a shelf about halfway between the flywheel and the compound oiler.
Imagine trying to keep eight make and break mechanisms in good order. Oh, to see and hear that engine run.
}} |
paulgray
Senior Member
Username: paulgray
Post Number: 58
Registered: 05-2003
| | Posted on Monday, September 15, 2008 - 07:59 pm: |
|
Wow- is this a vertical lay shaft I spy running the cam and ignitors?? Way cool pict. Imaging keeping the cylinders from flexing on those thin support pins- I'll bet the crank layout helped this, ie firing pressure pushing one side while compression pushing the other way helped. Thanks for the posting |
searcher
Senior Member
Username: searcher
Post Number: 259
Registered: 10-2004
| | Posted on Monday, September 15, 2008 - 08:08 pm: |
|
It looks like that vertical shaft is also running the dynamo. |
doug_charles
Member
Username: doug_charles
Post Number: 5
Registered: 07-2008
| | Posted on Tuesday, September 16, 2008 - 02:40 am: |
|
Scientific American, Nov. 19, 1904: Onontio, 60 ft., owner Harrison B. Moore, ran nautical mile in 2:26 turning 900 rpm. Craig rated at 175 hp (other sources 250 hp @ 850 rpm). Cylinders 7.75"x 10" (other sources list 9" stroke), 20 seven-eighths inch steel stanchions, crankshaft and con rods hollow, 4 valves per cylinder, 80 psi compression, weight 3,500 lbs. Prop reversible-blade, 3 blades, pitch from 30" to 60".
Boating, Nov. 1906: Engine removed and put in H.N. Baruch's new Skedaddle, replaced by 6-cyl. 9"x 10.5" Craig.
See lesliefield.com for Onontio history. |
|
|
|
|
