Search found 84 matches
- Sun Jan 17, 2016 4:50 pm
- Forum: Technical - non Engines and Boilers
- Topic: Off Centre Layouts - a bad thing?
- Replies: 6
- Views: 8912
Re: Off Centre Layouts - a bad thing?
If you look up "Mudlark" owned by the late David Harding you will see that he used a fairly large single cylinder engine mounted starboard driving, via a 3" toothed belt, the central prop shaft. He never had to change the belt over many years, thousands of hours, use. Having spent lots of hours boat...
- Sun Jan 17, 2016 4:38 pm
- Forum: Technical - Engines and Boilers
- Topic: Sizing Toothed/Synchronous Belts for prop drive
- Replies: 41
- Views: 45058
Re: Sizing Toothed/Synchronous Belts for prop drive
Because Tenacity's prop is only 14" diam, the vessel is fitted with a 2:1 speed increaser which utilises a 1 1/2"" wide toothed belt off the rear of the Leak compound. When the prop has hit rock or picks up a spring mattress (the canals are used a a rubbish tip by some people) I'm very glad to say t...
- Wed Jan 06, 2016 4:57 pm
- Forum: General Steamboat stuff
- Topic: Shamrock Restoration Appeal
- Replies: 10
- Views: 60579
Re: Shamrock Restoration Appeal
Unfortunately I have to report the following re-occurrence, the first being that mentioned above. The 2009 incident resulted in Roger Mallinson transferring to the Shamrock Trust. During the night of 5/6 December heavy rainfall resulted in Windermere rising to 2.82 meters over the gauge datum. Shamr...
- Wed Jan 06, 2016 4:44 pm
- Forum: General Steamboat stuff
- Topic: Merry Christmas
- Replies: 25
- Views: 37432
Re: Merry Christmas
And a Happy New Year to you all, Good Steaming everyone.
JohnG
JohnG
- Fri Dec 18, 2015 12:05 pm
- Forum: Technical - Engines and Boilers
- Topic: Experimental Instrumentation
- Replies: 40
- Views: 40713
Re: Experimental Instrumentation
I seem to recall the late Robin Wallace Sims producing a unit that worked quite well, the difficulty being the attachment of the piston position sensor which varied so much, engine to engine, it had to be workshop modified for each situation. His software was written for a somewhat elderly portable ...
- Thu Dec 10, 2015 10:58 pm
- Forum: Technical - non Engines and Boilers
- Topic: Prop re-pitching
- Replies: 11
- Views: 17528
Re: Prop re-pitching
The video shows techniques not much difference to the way inlet guide vans were fine pitched on aero engines in the late 1960s. When I approached a UK propeller maker to re-pitch a prop for me he said that with a bronze prop, an extra 2" of pitch per foot of diameter was about the limit. Any decent ...
- Sat Oct 31, 2015 6:02 pm
- Forum: General Steamboat stuff
- Topic: 1929 Steam Drifter film
- Replies: 2
- Views: 4594
1929 Steam Drifter film
http://www.eafa.org.uk/catalogue/178 60 minutes of silent documentary on herring fishing. Not quite river cruising and they should have given the fire some top air. Door is quite high unless they can only show a wing furnace. Rather sad in that of all the ships involved, only Lydia Eva remains. John G
- Thu Mar 19, 2015 4:21 pm
- Forum: Technical - Engines and Boilers
- Topic: water pickup
- Replies: 41
- Views: 30299
Re: water pickup
Play it safe, use two separate supplies to the feed systems because a leak or problem in one will effect both if fed from a single 'sea cock'. Neither pumps nor injectors work if the feed is blocked or is leaking air. Also put sea cocks on all holes in the hull, including wastes from sinks and the l...
- Fri Feb 20, 2015 10:29 pm
- Forum: General Steamboat stuff
- Topic: Steamboat sound recording near SE Asia
- Replies: 7
- Views: 8339
Re: Steamboat sound recording near SE Asia
to continue Pete's theme, the steam launch "Shamrock" on Windermere is almost silent, no engine noise and all that can be heard is the quiet hiss of steam up the funnel and the sound of the water passing the hull. The use of a silencer in the engine exhaust does help and the feedwater is by injector...
- Wed Jan 28, 2015 8:54 pm
- Forum: Technical - Engines and Boilers
- Topic: Information on Surface condensers
- Replies: 25
- Views: 19489
Re: Information on Surface condensers
Firstly you cannot have condensate at a temperature below that of the cooling water. With a cold lake or sea and if the condenser is of the correct size and the vacuum pump working properly then a high vacuum can be obtained which means there is more work to be got from the low pressure cylinder. Re...