Search found 84 matches

by johngriffiths
Sun May 01, 2016 9:11 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 134
Views: 149058

Re: digital steam engine indicator

Webb's compounds were known for not starting because of the axles not being coupled. Wise station masters would arrange for a shunter to be strategically place to offer a helping hand, such was the power and influence of Chief Mechanical Engineers in British railway companies. Now't to do with engin...
by johngriffiths
Wed Apr 13, 2016 3:19 pm
Forum: General Steamboat stuff
Topic: A Windemere Kettle
Replies: 4
Views: 7110

Re: A Windemere Kettle

The image looks quite coppery, must be the light from the door behind. I know what you mean about copper pipe. Its just copper is more reactive at high temp, the hot water in this house is distinctly off in taste, even when cool, and it is not uncommon for Cu hot water tanks to waste from the inside...
by johngriffiths
Wed Apr 13, 2016 11:58 am
Forum: General Steamboat stuff
Topic: A Windemere Kettle
Replies: 4
Views: 7110

Re: A Windemere Kettle

Lovely sight, Have you thought of tinning the interior, not with plumber's solder but with modern pewter or pure tin, saves ingesting too much copper.
by johngriffiths
Mon Apr 11, 2016 1:55 pm
Forum: Technical - Engines and Boilers
Topic: Feed into twin drum watertube boiler
Replies: 13
Views: 14237

Re: Feed into twin drum watertube boiler

As Mike is local I thought he might like to know the Daniel Adamson (3 furnace, coal, riveted Scotch weight about 20 tons) has been fitted with an electrically powered hydrokineter to overcome the problem of a "cold bottom" mentioned by Fred earlier. The original feed pipes were taken up to the wate...
by johngriffiths
Tue Apr 05, 2016 8:16 pm
Forum: Technical - Engines and Boilers
Topic: Feed into twin drum watertube boiler
Replies: 13
Views: 14237

Re: Feed into twin drum watertube boiler

Hi Mike Its a good idea to give feedwater plenty of space to get rid of dissolved oxygen before it impinges on a tube or other part you don't want oxidised away. I've noticed on 3 and 4 inch traction engines that tubes opposite feeds can rust out quickly and know of one instance it was in four years...
by johngriffiths
Thu Mar 24, 2016 3:48 pm
Forum: Technical - Engines and Boilers
Topic: Injector Designs?
Replies: 9
Views: 9395

Re: Injector Designs?

Pity you had to go because DAG Brown brought along the brazing up jigs he uses for the bodies as well as his cone reamers. His book "Miniature Injectors Inside and Out" (Camden OS, Tee In Stock on website) contains enough to do some sums to calculate nozzle areas for larger examples plus photos of t...
by johngriffiths
Tue Mar 15, 2016 10:11 pm
Forum: Technical - non Engines and Boilers
Topic: K. N. Harris' Twin Launch Engine
Replies: 16
Views: 22118

Re: K. N. Harris' Twin Launch Engine

Hold the book open at 90 degrees, light it evenly and use a camera. If you organise it properly you can keep the page flat using strips of lead covered in cloth placed along the top and bottom edges. If the lead is in the form of an L it will not slip away. You don't want to break a spine. Interesti...
by johngriffiths
Tue Mar 01, 2016 8:21 pm
Forum: Technical - Engines and Boilers
Topic: Coal Firing,good info although the video is locomotive based
Replies: 4
Views: 5778

Re: Coal Firing,good info although the video is locomotive b

Didn't realise, was seriously otherwise engaged back in 2013.

Cheers

John
by johngriffiths
Mon Feb 29, 2016 12:41 pm
Forum: General Steamboat stuff
Topic: Steam water heater
Replies: 21
Views: 23499

Re: Steam water heater

Daniel, there is nothing to stop a lifter being used to take water from an internal tank, you might want to put a very light non return valve on the supply side. It has the immediacy of a pre heated Wm kettle without the danger to the skin. Windermere water isn't so great when the blue algae bloom, ...