Search found 281 matches

by steamboatjack
Sat Dec 05, 2009 1:41 pm
Forum: Technical - Engines and Boilers
Topic: Triple Expansion Engine - Elliott Bay
Replies: 89
Views: 85720

Re: Triple Expansion Engine - Elliott Bay

Dave, Don't get me started! the problems I have had are many and various, too much to list here, I will offer a tome to the "funnel" magazine once I have done the trials (steam trials not court trials). I have re-designed many items and managed to juggle some of the other problems, I have all the de...
by steamboatjack
Sat Dec 05, 2009 1:40 pm
Forum: Technical - Engines and Boilers
Topic: Triple Expansion Engine - Elliott Bay
Replies: 89
Views: 85720

Re: Triple Expansion Engine - Elliott Bay

crank pin brg. vertical height 2.312 over all width 2.85 bolt ctrs 2.125 palm width 1.25 crosshead pin brg vertical height 1.437 over all width 2.125 bolt ctrs 1.5 palm width .75 valve brasses vertical height 1.25 over all width 1.75 bolt ctrs 1.25 palm width .375 piston height .75 (not really enoug...
by steamboatjack
Sat Dec 05, 2009 1:39 pm
Forum: Technical - Engines and Boilers
Topic: Triple Expansion Engine - Elliott Bay
Replies: 89
Views: 85720

Re: Triple Expansion Engine - Elliott Bay

overall length of the connecting rods (centre to centre) 11.625 -length of just the iron rod itself 9.875 -overall height of the engine 32 -height of the block 6.0 -height of the colums 17.437 -length of the engine 32 -dimentions of the big-end (con-rod) brasses 1.5 dia x 1.75 -little-end brasses 1....
by steamboatjack
Sat Dec 05, 2009 1:38 pm
Forum: Technical - Engines and Boilers
Topic: Triple Expansion Engine - Elliott Bay
Replies: 89
Views: 85720

Re: Triple Expansion Engine - Elliott Bay

Pic shows some more progress on the first engine, machining the new eccentric rod top ends. The original S.G. iron castings have been rejected due to poor castings and insufficient machining allowance. The eccentric rods are being made in two parts from 230M07 (free cutting mild steel). note the fix...
by steamboatjack
Sat Dec 05, 2009 1:31 pm
Forum: Technical - Engines and Boilers
Topic: Triple Expansion Engine - Elliott Bay
Replies: 89
Views: 85720

Re: Triple Expansion Engine - Elliott Bay

Ken, Hi the columns are of stainless steel, 303 is best as it’s free cutting. I also use only stainless nuts as it’s not worth doing otherwise, the only exception being if higher tensile fasteners are required, A2 stainless is ok but not as strong as some people think, also its most important to use...
by steamboatjack
Fri Dec 04, 2009 8:51 am
Forum: Technical - non Engines and Boilers
Topic: steam jet air ejector
Replies: 6
Views: 9240

Re: steam jet air ejector

never tried this but it's crossed my mind a few times, would be useful with uniflow engines to ensure a vacuum at starting. I guess a single stage ejector would suffice for a launch with perhaps a pump as well for the bulk of the condensate. problem with an air ejector is that the heat from the stea...
by steamboatjack
Tue Dec 01, 2009 11:32 am
Forum: General Steamboat stuff
Topic: Floods in Cumbria, UK
Replies: 19
Views: 19358

Re: Floods in Cumbria, UK

Miraculously Grayling appears to have survived almost unscathed! She is out the water now awaiting the insurance surveyor but the boiler & engine have been dried out with a charcoal fire, all ok.
Regards jack
by steamboatjack
Tue Nov 24, 2009 12:36 pm
Forum: Members' Websites and Boats
Topic: building Panatela
Replies: 46
Views: 47745

Re: building Panatela

Piet, looks a great project, I always liked the idea if this hull, no doubt fast! I know the boiler from the previous owner, and I have a very similar one in Grayling (or I think so as its on windermere lake bed at the moment!!!!!) the engine looks good to. If you need any help/advice give me a call...
by steamboatjack
Sun Nov 22, 2009 11:16 am
Forum: Technical - Engines and Boilers
Topic: To get a triple
Replies: 26
Views: 29146

Re: To get a triple

Hi, Engine speed is really a function of stroke length to get a reasonable piston speed, therefore an engine should be built to run as fast as the maximum piston speed allows assuming other factors such as inbalance do not pose a problem. Most steam launch owners operate way below the maximum piston...
by steamboatjack
Fri Nov 20, 2009 9:31 am
Forum: Technical - non Engines and Boilers
Topic: What does your steamboat shed/workshop look like?
Replies: 9
Views: 12706

Re: What does your steamboat shed/workshop look like?

when the pics of the Kearns were taken I was waiting on the sparks wiring it up.
its done now (almost) and thanks for the 60th birthday present! I always wanted a kearns borer.
(family joke)

regards Jack