| | Bridge for Lazy Grange Bay II | |
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Guest Guest
 | Subject: Bridge for Lazy Grange Bay II Thu Nov 05, 2009 3:34 pm | |
| Mr Duffy requested a bridge to gover the newly instigated lake at Lazy Grange Bay After much "umming and aahhing", measuring and research, work commenced. Mikes bridge needs to be 42" - That's 1066.8mm.... Needed 2 off 20mm x 40mm rectangulat steel tubes - Guess what? - They don't stock this size in the UK - So got 2 x 20mm x 20mm and welded 'em together Pic below shows welded , then filled with car body filler, then with a spread of cellulose filler   Next up was to mark up for horizontal supports (It'll come clearer when I get nearer to completion   Hacksaw on the marked out lines 6mm deep Then attack with the angle grinder to remove metal between hacksaw cuts  Note:- I put me glasses on - Not to see more clearly, but to protect my eyes  One set of uprights brazed into place  Another 10 uprights to do and then some paint - NEED to find some stainless steel / aluminium mesh for the walkways  Latest update so far Needs a spot of rubbing down and filling first and then on with the paint Need to make the walkways next  Here it is, painted up with that yucky "Ford Signal Green" that Mike bought Bloody 'orrible it is Never mind - got a better colour to go over the top  Just made the first of the 10 pieces I'll need to create the walkways. Not difficult to do - Just time consuming... Full length of one piece  And a close up - I've used the mesh that you can get for doing car body repairs. Would have liked to have made just 2 full length walkways...... BUT - 1250mm x 300mm of 5 x 3mm aperture = £23! The mesh I've used was £1.69 each for a piece just a bit smaller than A4.  'Tis finished   And to give a sense of size  And finally a couple of pictures of the bridge in place   And the last  |
|  | | mike

Location : sunny whitworth, near bacup, rossendale
 | Subject: Re: Bridge for Lazy Grange Bay II Thu Nov 05, 2009 3:59 pm | |
| thanks to ians brillent hard work, Lazy Grange Bays rack section moves forward, tiss a beautifull bridge, much ,much impressed ian  | |
|  | | mike

Location : sunny whitworth, near bacup, rossendale
 | Subject: Re: Bridge for Lazy Grange Bay II Thu Nov 05, 2009 4:02 pm | |
| it fits perfectly, its resting on stone pillers, sunk in to the banking, riseing up the banking, i think you could park a car on the bridge, its that strong.. ta ian  | |
|  | | mikeyh

Location : Dordogne France
 | Subject: Re: Bridge for Lazy Grange Bay II Thu Nov 05, 2009 4:11 pm | |
| Not only strong but it looks really good as well. Nice design!
Mikey | |
|  | | French Chuffed
Location : Droitwich UK
 | Subject: Re: Bridge for Lazy Grange Bay II Thu Nov 05, 2009 6:09 pm | |
| Nice strong bridge, looks really good. Great series of pictures by the way as well  | |
|  | | mike

Location : sunny whitworth, near bacup, rossendale
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 8:27 am | |
| ta guys, just a point off possable intrest, the watermill, came with a electric motor, to power the wheel., and a loverly(  )plastic base....well thats too easy, and it looked poo... so, motor removed, bit off research, and a lot off fetalling.. now its water powered, a truely, undershot water mill..more details if intrested.....  | |
|  | | clive_t

Location : Portsmouth, England
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 8:33 am | |
| Nice work. I like the waterwheel too. I was curious about the sluice gate in the pic above - did you make that or was it part of the kit? _________________ Cheers,
Clive
Fat Controller of the Great Unfinished Railway, formerly the S&CGR
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|  | | French Chuffed
Location : Droitwich UK
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 8:38 am | |
| It’s part of the kit Clive as I have one with mine. Yes I would be interested in how you made it work Mike, for future reference. | |
|  | | mike

Location : sunny whitworth, near bacup, rossendale
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 10:34 am | |
| it is indeed part off the kit, works too, which is nice... after doing a bit off resurch, and finding wilkapeidia completly wrong...water wheel wont work just sat in a river.. found this usefull diagram..  | |
|  | | mike

Location : sunny whitworth, near bacup, rossendale
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 10:39 am | |
| i used a plastic gutter as the river, and base for the undershot bit.. glued in plastic L section, to form a chanle, 1 mounted on top off a nother, made the drop, to fit the wheel ,and glued that in plasce,  | |
|  | | mike

Location : sunny whitworth, near bacup, rossendale
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 10:43 am | |
| the wooden wallkway is sipmly that, bit off wood, lines scribed in, sat in the by pass chanels, the sluices gate regulates the flow, this vies shows the drop, before i detailed it  | |
|  | | clive_t

Location : Portsmouth, England
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 1:10 pm | |
| Nice job! So, not only do you run your own railway, you get to mill your own flour!  _________________ Cheers,
Clive
Fat Controller of the Great Unfinished Railway, formerly the S&CGR
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|  | | French Chuffed
Location : Droitwich UK
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 1:44 pm | |
| I like it! Definitely the way to go with my water mill, I will just have to work out a position on the overflow stream from the canal. | |
|  | | KleineDicke

Location : Deep in the Heart of Texas (Houston)
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 3:21 pm | |
| [quote="mike"]it is indeed part off the kit, works too, which is nice... after doing a bit off resurch, and finding wilkapeidia completly wrong...water wheel wont work just sat in a river..
Hydrology 101: Water wheels (undershot and overshot) are driven by the differential head (engineer speak for change of height) of the water, not the flow of the water per se, converting the potential energy of the head into a more useful form of mechanical energy. Same with turbines in hydroelectric dams. A river flows as the result of differential head (typically changes of meters over many kilometers except of course for phenomena such as waterfalls) having been converted into kinetic energy.
One could design a device to capture the flowing (kinetic) energy of a river, but it would probably be closer to a windmill or a paddlewheel on a steamboat in concept than a water wheel.
Class dismissed. _________________ Bill Wray
"It is one of the happiest characteristics of this glorious country that official utterances are invariably regarded as unanswerable." -Sir Joseph Porter, First Lord of the Admiralty (HMS Pinafore)
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|  | | philkelly

Location : Vienne, France and Islington. London
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 4:02 pm | |
| [quote="KleineDicke"] - mike wrote:
- it is indeed part off the kit, works too, which is nice...
after doing a bit off resurch, and finding wilkapeidia completly wrong...water wheel wont work just sat in a river..
Hydrology 101: Water wheels (undershot and overshot) are driven by the differential head (engineer speak for change of height) of the water, not the flow of the water per se, converting the potential energy of the head into a more useful form of mechanical energy. Same with turbines in hydroelectric dams. A river flows as the result of differential head (typically changes of meters over many kilometers except of course for phenomena such as waterfalls) having been converted into kinetic energy.
One could design a device to capture the flowing (kinetic) energy of a river, but it would probably be closer to a windmill or a paddlewheel on a steamboat in concept than a water wheel.
Class dismissed. Bill: were you a physics teacher in another life? That's the most succinct explanation of the relationship between potential and kinetic energy I' ve ever read: my school textbook took about three pages to cover what you did in three sentences..  | |
|  | | KleineDicke

Location : Deep in the Heart of Texas (Houston)
 | Subject: Re: Bridge for Lazy Grange Bay II Fri Nov 06, 2009 4:35 pm | |
| Phil: I am a Chemical Engineer, so hydraulics is something I deal with daily, although I haven't seen many water wheels in our plant lately. Thanks for the compliment; I seem to have a knack for explaining things in succinct terms. It is likely the result of many years of working with others for whom English was not their native tongue. Eschew obfuscation, I always say.  _________________ Bill Wray
"It is one of the happiest characteristics of this glorious country that official utterances are invariably regarded as unanswerable." -Sir Joseph Porter, First Lord of the Admiralty (HMS Pinafore)
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