userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Oct 22, 2019 15:48:15 GMT -5
Thanks for confirming what I thought might be the case. That said, I've had a look tonight and I can run it on the pressure side easily enough now. Just had to move a bracket and a pipe. Easy at this stage... Few bits and pieces done tonight, cable runs starting to go in. Ignore the flex hose going to the oil drain, I was just trying to map out oil flow using pipes lay around. It's all being made out of 12 mm stainless... which I'm sure will cause me more trouble
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Post by racket on Oct 22, 2019 16:23:10 GMT -5
Yep , much better on the delivery side as the oil going in will be cooler
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Oct 28, 2019 4:52:19 GMT -5
Plumbed fire extinguisher nailed on today. Unlike karts and stationary engines, when running this train I'll end up many miles from where I started so she has to be self sufficient. Nozzles will be aimed at turbo and combustion chamber!
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slittlewing
Senior Member
Joined: November 2017
Posts: 458
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Post by slittlewing on Oct 29, 2019 14:58:01 GMT -5
Looks like great build quality - nice work! I'm looking forward to the fire up videos! Where will you be able to test it? Cheers Scott (another one haha)
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CMDR_Boom
Member
Joined: September 2019
Posts: 23
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Post by CMDR_Boom on Oct 30, 2019 14:45:56 GMT -5
Out of curiosity with your other carts, where abouts did you max out on top speed on rail? While I'm conjecturing you'll be far south of take off speed, are their any plans for bodywork for streamlining, or is this more In the Wind? I'm only commenting on this as in the back of my mind, I'm adding front and rear downforce planes expecting you'll woo me and say 165mph.
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Nov 11, 2019 19:58:54 GMT -5
Looks like great build quality - nice work! I'm looking forward to the fire up videos! Where will you be able to test it? Cheers Scott (another one haha) Hi Scott! Are you in the UK? We have a number of places to test in England and Wales but will finalise this nearer the time..... reckon we will make the speed run in North Wales though..!
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Nov 11, 2019 20:01:31 GMT -5
Out of curiosity with your other carts, where abouts did you max out on top speed on rail? While I'm conjecturing you'll be far south of take off speed, are their any plans for bodywork for streamlining, or is this more In the Wind? I'm only commenting on this as in the back of my mind, I'm adding front and rear downforce planes expecting you'll woo me and say 165mph. The others generally sit at about 70 mph or less, but we have had silly speeds here and there. With this vehicle I'm hoping for 100 mph but the chances are obviously slim. You'll be amazed how LITTLE power you need on rail though. My first trolley had a four cylinder bike engine on and wasn't that quick. I built a 7 hp version using a lawn mower engine and got 60 mph straight away... less is usually more. I had tried some kart bodywork on this but it looked awful. I'm trying to get hold of a front end from a 250 shifter but we shall see.... This is how she sits today, no major progress sadly but hopefully over the coming four weeks she will move on.
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slittlewing
Senior Member
Joined: November 2017
Posts: 458
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Post by slittlewing on Nov 12, 2019 3:23:59 GMT -5
I am mate, I live in hertfordshire and work in Buckinghamshire. Where abouts are you based? North wales.. you will scare some sheep Cheers Scott
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Nov 21, 2019 4:07:11 GMT -5
I am mate, I live in hertfordshire and work in Buckinghamshire. Where abouts are you based? North wales.. you will scare some sheep Cheers Scott I'm in Manchester so not a million miles away! Latest updates on the train - oil system is effectively now complete, the missing 90 degree fitting has now turned up and she's looking good. I need to finish the flame tube, end cap, sparking system, wire her up and paint. We are getting close! Question on the sparking system - I can't find a definitive on what people use, other than the cheap eBay units. Is there a reason why I can't use an automotive 12v coil and condenser to make a spark?
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Post by turboron on Nov 21, 2019 7:21:07 GMT -5
user, there is a good video on YouTube about using a 5 pin Bosch relay, a condenser and a 12 volt coil to make a DIY igniter. I build one for test. It gave a great spark.
I use a Custom Coil unit which works but I have to clean the sparkplug after every fireup.
Thanks, Ron
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Nov 21, 2019 10:04:31 GMT -5
user, there is a good video on YouTube about using a 5 pin Bosch relay, a condenser and a 12 volt coil to make a DIY igniter. I build one for test. It gave a great spark. I use a Custom Coil unit which works but I have to clean the sparkplug after every fireup. Thanks, Ron I've seen that one! I've decided to go ahead with the coil/condenser. I've already got a coil and a flasher relay so I'll include these into the wiring... hopefully not too much more left to do after this, well, until it's time to build the afterburner.... !
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Post by racket on Nov 21, 2019 16:20:52 GMT -5
Hi Scott
I used a flasher and coil on my bike , but changed to a small 12V motor with a homemade cam on the shaft that opened a set of points for the kart , its been on my test stand ever since
Cheers John
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Nov 24, 2019 19:43:12 GMT -5
Latest update, all the little jobs I couldn't be fussed doing! Rear tow hitch attached - unlike a kart or any other practical applications on here, getting the train back to the start is a bit of a logistical nightmare. It will be loaded onto the track using a little crane and the lifting frame, but wherever she stops is anybodies guess, potentially miles from the start. It's not possible to turn it around, and of course she can't run backwards, so it'll have to be towed back. I have a small petrol engined loco which can be used to tow it back quite comfortably, and the reason for the long length of the tow hitch is that in future, the afterburner will be supported from this same bracket. The large bore tube in the first picture will be where one of the lightweight parachutes for braking will be fitted. Without going into too much boring detail, even from 40 mph with these wheels it can take the best part of a kilometer to stop. The wheels simply slide - and invariably don't lose speed in the process - thus it's almost always needed to use something like a parachute/droge to drop the speed to a level whereby the treadbrakes become effective again. Unlike a kart, you have to plan - a long long time in advance - when you want to stop, and realistically apportion 3 to 6 minutes for this process to take place. A valve has been fitted for draining the combustion chamber. I have no interest in finding out the hard way if theres excessive amounts of fuel inside the tank before starting and after she's been left unattended overnight. The drain is a nice and easy way I can reassure myself that it's not swimming in kerosene! Lastly a diffuser has been fitted on the compressed feed into the chamber. As John said earlier in this thread, it wasn't ideal that I'd just mounted the tube straight into the chamber. This now has a 4" flare on it which was about as big as I could reasonably fit into it. From side on it looks like it'll do a nice job of sending cold air all around the flame tube.
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Jan 7, 2020 21:19:22 GMT -5
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Colin Heath
Junior Member
Joined: January 2020
Posts: 77
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Post by Colin Heath on Jan 8, 2020 14:47:29 GMT -5
Great thread Scott and has been helpful in ideas for my first build about to start.
I will look forward to seeing this run, Im UK also but in the warm sunny south.
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