Search found 284 matches

by gondolier88
Fri Jun 24, 2011 6:26 pm
Forum: Technical - non Engines and Boilers
Topic: Re-pitching small diameter propellers
Replies: 3
Views: 5219

Re: Re-pitching small diameter propellers

I have no idea of displacement, havn't even seen a photo yet, it's a 23' GRP lifeboat hull that can accomodate upto an 11" dia. prop'. I'm very aware of what he needs, however as we have a propellor to start with, if all it's worth is scrap or someone else's bargain on eBay then I see no reason why ...
by gondolier88
Wed Jun 22, 2011 5:01 pm
Forum: Technical - non Engines and Boilers
Topic: Re-pitching small diameter propellers
Replies: 3
Views: 5219

Re-pitching small diameter propellers

Hi, As the title of the subject suggests, I have been given a couple of things to sort out for a new SBA member who's fitting out a GRP ex lifeboat hull with a VFT boiler and Cyril Taylor compound. On the list is a beautiful little brass prop' that was coupled to a Lister marine engine- it is the ri...
by gondolier88
Wed Jun 15, 2011 9:10 pm
Forum: Members' Websites and Boats
Topic: DetroiTug's Tug is going together
Replies: 388
Views: 388911

Re: DetroiTug's Tug is going together

Hi Ron,

That's a very neat funnel design, although I have to say I prefer it in the slighlty raked position that you are holding it in as far as aesthetics go.

Greg
by gondolier88
Mon Jun 06, 2011 4:14 pm
Forum: Technical - Engines and Boilers
Topic: Steam engine fuel efficiency
Replies: 25
Views: 22401

Re: Steam engine fuel efficiency

Overall it's dead reliable, using free power, and pushes air in the correct direction whether the engine is in ahead or astern (unlike a belt-driven fan). It would be even more effective if it were sized properly to the engine displacement and RPM. The only issue I see with the use of an exhaust tu...
by gondolier88
Tue May 31, 2011 5:50 pm
Forum: Technical - Engines and Boilers
Topic: Steam engine fuel efficiency
Replies: 25
Views: 22401

Re: Steam engine fuel efficiency

In a boat with plenty of room for experimentation a negative pressure furnace could be emplyed where a fan sucks the PofC out of the heat exchanger, into a duct filled with a secondary heat exchanger that has feed water in it. If a an exhaust steam feedwater heater was also employed, as well as a co...
by gondolier88
Wed May 25, 2011 6:19 am
Forum: General Steamboat stuff
Topic: Stupid Question
Replies: 6
Views: 7300

Re: Stupid Question

Sheerwater?
by gondolier88
Mon May 09, 2011 5:46 pm
Forum: Technical - non Engines and Boilers
Topic: What happens when it breaks!
Replies: 13
Views: 15247

Re: What happens when it breaks!

Hi Mal, Re. small sail; the rig of a mirror dinghy is in the region of 60-65sq.ft.- this would give a lightweight 10ft dinghy a fair bit to think about, but a 25ft SL with boiler and engine on the centreline should cope with nothing but a little bit of an attractive lean to leeward. You could always...
by gondolier88
Thu May 05, 2011 8:13 pm
Forum: Technical - non Engines and Boilers
Topic: What happens when it breaks!
Replies: 13
Views: 15247

Re: What happens when it breaks!

Hi Mal, A very sensible question, in answer; You could do with changing your attitude on a couple of things- 1- A well designed and maintained plant won't quit on you- that said you may quit on it- not paying attention etc etc. But if you are saying that is a WHEN rather than an IF, then I would rec...
by gondolier88
Tue Apr 26, 2011 9:32 pm
Forum: Members' Websites and Boats
Topic: Medea haul out
Replies: 8
Views: 10453

Re: Medea haul out

Hi Chris, That's some tidy work on the rudder post there! Good to see it works well too- 3min MOB drills are hard to do, that's an impressive turning circle you must be pulling! Interesting your boiler was made by Riley's- they were prolific marine and stationary boilermakers, and made some extremel...
by gondolier88
Tue Apr 19, 2011 9:26 pm
Forum: Members' Websites and Boats
Topic: DetroiTug's Tug is going together
Replies: 388
Views: 388911

Re: DetroiTug's Tug is going together

Hi Ron, A suggestion re. the first brace- I would strongly advise you do NOT make a filer peice for the grooves in the vertical panelling; instead using the first brace as a template, draw a line all the way around it. Using a router, machine the inside of the outline left to a depth of about 1/8" d...