decauville1126
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Posts posted by decauville1126
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On 09/01/2018 at 6:38 PM, Hair Bear said:
Going off on a slight tangent, I've heard rumor of a narrow gauge railway running east-west direction just south of the A30 between Gibraltar Barracks at Minley and Blackwater. There is supposed to be a small girder bridge out there somewhere! Not an area I'm familiar with so does anyone else know anything?
The 10.25inch gauge Surrey Border & Camberley Railway ran in this area and had many spectacular features befitting the ideals of the wealthy individuals who funded it. Google around and you can find maps, etc., which might help.
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You can usually get cheapish sandblast guns from ebay but remember they do need quite high free air volume and 50psi pressure and above. If your compressor can run a paint gun then you'll be off to a good start.
Many blast media are available, some vicious and some very gentle. Tinwork though has a habit of exhibiting tinworm after blasting. I live on the coast and have used sieved dried beach sand on motorcycle frames with success. Face masks are very necessary.
Have a go - trial and error for a minimal outlay will give you a good idea of how it can help you. And don't forget to have primer handy as ferrous components will start to oxidise straight off - nice dry warm sunny day is best. Need to get primer on within about 20 minutes.
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5 hours ago, BC312 said:
I have seen many Wickhams motorized trolleys but non of the winch pull ones that just had a flat bed. Didnt know that the motorized trollies had a fluid flywheel. It would be interesting if these winch engines were the same type made and used throughout the UK during the war.
Target trolley at around 3.05. Other interesting military-related motive power too.
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Are you restoring a submarine?
Chris.
No. This:
Built by Brush of Loughborough in 1917 for Ministry of Munitions. So hopefully it qualifies as military otherwise I might get chucked off this forum!
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Er, how big is the battery, because 15mA is quite a considerable current drain for a meter, and you should be able to get something far more sensitive than that without too much difficulty. (500 microamps (0.5 mA) was common for panel meters during WW2, and modern test meters are usually a tenth of that.)
Chris (G8KGS)
Probably be seeing how 2x 24V 200ah (ie 8 12v 100ah batteries) does as the control system is parallel/series/series with weak field, so 48V max. This is half the original design but should suffice and give a reasonable run time. Controller is rated at 44 amps. Testing has so far involved 2 12v spare batteries which has proved promising. Luckily I have competent persons to oversee what I'm doing or thinking of doing!
I'm very appreciative of the help and guidance I've received on this forum.
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I just noticed the 'A.P.' part number. "Admiralty Pattern" so probably off something very substantial!
Also, 60 volts at 15mA is 0.9 Watts, so your series resistor will get quite warm and needs to be rated at 1 Watt or more.
Chris. (G8KGS)
Thanks for that advice - that's why I seek enlightenment!
'Proving' resistor is only 1/4 watt, so have ordered a pack of 1 watt ones to come on a slow boat from China.
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Hi
Since the meter itself has a resistance of 400 ohms we need to add 3600 ohms (3.6K) in series with the meter as a "multiplier" to make up 4000 ohms.
As a sanity check, the less scientific approach is to say that as the FSD current is a physical property of the meter, and to get the same current at 60V as at 6V requires a resistance 10 times higher, and as the meter is marked 400 ohms, the 60V range should need 400 * 10 = 4000 ohms.
Hope this helps
Iain
Many thanks Iain. I had to use 2x 2k resistors in series as they are the nearest to hand, and although I realise there is a % error it's near enough. It works.
And I also appreciate Clive's post about checking zero when the meter is vertical - I've already discovered what happens when you keep turning the slotted button on the front too far! I use a digital meter to confirm the volts at, say, 5.0, then adjust the button to that. Then power off/on and recheck. Thankfully it's not critical as it will be used to monitor voltage drop to prevent - hopefully - overdischarge of a 60V battery.
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Just acquired the voltmeter shown. Works fine and accurate on the lower scale but I need to use it up to 60V DC. So can anyone suggest what size resistor needs to be used? The internal resistance is 400 ohms as marked. No idea what it has come from but is appropriate for what I have in mind.
Many thanks for any help.
P1050428 by Peter Smith, on Flickr
P1050429 by Peter Smith, on Flickr -
Thanks. Already in contact with them as they were suggested by someone on another forum. Just awaiting a price ....
But happy to explore other leads, particularly from surplus dealers.
Sadly their price makes it unviable. So still looking and maybe will have to re-engineer to roller chain.
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Try
were very helpful when i needed a inverted tooth chain for the camshaft of my car.
Motorfahrer
Thanks. Already in contact with them as they were suggested by someone on another forum. Just awaiting a price ....
But happy to explore other leads, particularly from surplus dealers.
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Try this place, I've always found them helpful with odd chains. http://www.fiveways-bearings.co.uk/
Sadly they were unable to help. Following up one other lead but any further suggestions welcome.
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Try this place, I've always found them helpful with odd chains. http://www.fiveways-bearings.co.uk/
Many thanks - I've emailed them with my needs, so will hope for a positive response.
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Have you tried contacting Morse chain or Ramsey chain suppliers?
They can supply any length that you want
Thanks - aware of them but need to try to source reclaimed or surplus chain first as the cost of silent chain seems to be vastly higher per pitch than roller chain.
A helpful chap on here has given me a 'sympathetic' possible contact and I'm waiting for a response.
But when push comes to shove I may have to bite the bullet and try the manufacturers as you suggest for new chain and see what the costs are. I could re-engineer the chain drive to become roller chain, but the effort and expense is probably not warranted on an item that will see infrequent light demonstration operation only.
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I am looking for some 1" and 3/4" pitch silent chain, both 1.5" wide with centre guide. The designations are SC806 and SC606 respectively. Approx 10ft of the 1" and 20ft of the 3/4" pitch although shorter lengths would be considered.
Needed for a WW1 battery locomotive restoration as that I have is incomplete and totally sh*gg*d.
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Many thanks for that - bought one from another supplier for £20.99. Used it today and works very well. Worth rummaging around on ebay for the best deal.
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Have you tried a sail maker?
This one is not too far away from you:-
Thanks for that. I've tried a few local sailmakers but they seem nowadays to work in very lightweight jazzy fabrics whereas I'm looking for a traditional canvas. So I'll drop by the one you've suggested when I'm next passing Brighton Marina.
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Can anyone suggest a supplier who could make a pair of canvas sheets with sewn-in windows for a roller blind? I can probably sort the mechanism side, just looking for someone who can help with the sides. I'm near Littlehampton in Sussex. Thanks for any leads.
And as an aside, even though I spent many years as a graphic designer, I could never match the font used for the numeral "7" on the image. It's a factory-posed pic so may have been whatever the paintshop did, but I need a "3" in the same font, whatever that may be!
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Came across this forum by chance whilst researching the Dennis lorry-on-rails they used to shunt their works in Guildford. Thanks to Richard Peskett who has already replied.
Currently working on a 1917 2ft gauge Brush battery electric loco, ex-Ministry of Munitions, Queensferry, Deeside, which may count as a military vehicle too?
Have tried to post an intro for the past couple of days so perhaps one (or more!) will suddenly appear!
Tracks to the Trenches - 2018!! (13-15th July)
in Pre WW2 vehicles
Posted
Shaping up to be an incredible event.
Ministry of Munitions No.3, Brush 16303 of 1917 battery loco, loaded last night ready for the long trip up from the Sussex coast to Staffordshire.
Just hoping the weather is not too hot!