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 Live diesel 2

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dtsteam




PostSubject: Re: Live diesel 2   Thu Aug 11, 2011 6:01 pm

Time to flaunt my ignorance again.... why are there three pipes in the fuel tank ? and how long a run are you hoping for ?
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Live diesel 2   Thu Aug 11, 2011 7:28 pm

That's a good question actually.

The 3 pipes are for filling, pressurizing from the exhaust and supply to the engine.

Nitro engines need a sealed pressurized tank or a pump.

I should get abot 30 - 45mins run on 55ml depending on speed/load.
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David Grantham



Location : Midlands, England

PostSubject: Re: Live diesel 2   Fri Aug 12, 2011 7:28 pm

Great stuff Carl, very inspirational.
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BarryReeves



Location : UK

PostSubject: Re: Live diesel 2   Mon Aug 15, 2011 9:07 am

The four stoke engine to go for is the smallest OS youcan get. I used the FS26: FS = four stroke and 26 = 0.26 cu ins. I think they do a slighly bigger unit now. They idle at about 2300 and using a big 15V can as generator you can get fuill power at about 2750. With the right silencing they are not at all noisy.

Barry Reeves
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Live diesel 2   Tue Aug 16, 2011 1:31 pm

Whilst bazzing around for things and talk of Essel chassis elsewhere I noticed that their website is improved with a whole load of interesting products not just for diesel heads but scratchbuilding in general.

Essel new website
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antonr91



Location : south-east England

PostSubject: Re: Live diesel 2   Tue Aug 16, 2011 10:00 pm

I was looking at there new site the other day as i was thinking of getting some buffers for the shunter...

That is one question ive been wanting to ask. is there a standard kind of coupling used for 32mm locos and or 45mm locos? as ive noticed your green monster has a fancy looking one Very Happy
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Live diesel 2   Wed Aug 17, 2011 6:53 am

No real standard coupling, 16 mm modellers tend to use a solid centre buffer with a cast hook as Roundhouse. Then everything is coupled with simple chain.

Elsewhere LGB couplings are obviously popular and also gaining favour are the chopper type couplings that Accucraft use.
Buck-eye knuckle couplings are used on U.S. stock and some European (Swiss/German) modellers use these too.

Marklin and Regner make scale working 3 link couplings.

I make my own hook and simple chain from brass rod/wire. It's cheap and not difficult, just a bit tedious.
Again with the buffers, sprung centre type from brass tube.

A supply of paper clips at exhibitions enables universal coupling. Smile

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clive_t



Location : Portsmouth, England

PostSubject: Re: Live diesel 2   Wed Aug 17, 2011 5:25 pm

I like 3-link - I usually get Carl to make mine! Cool

_________________
Cheers,

Clive

Fat Controller of the S&CGR

http://www.scampington-chipside.co.uk
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antonr91



Location : south-east England

PostSubject: Re: Live diesel 2   Sun Sep 04, 2011 8:51 pm

Carl, i just found this while browsing another forum:



Where is the location of this? as it seems a pretty good layout?


Last edited by antonr91 on Mon Sep 05, 2011 6:25 am; edited 1 time in total
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Bearcastle



Location : Brie

PostSubject: Re: Live diesel 2   Mon Sep 05, 2011 4:26 am

It was a nice week-end.
Thats' Carl with his monster diesel Very Happy and the little one is my son.
There was a lot of people there and Dragon scale (shop) came from UK for week-end as well.
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philkelly



Location : Vienne, France and Islington. London

PostSubject: Re: Live diesel 2   Mon Sep 05, 2011 7:14 am

I think these are my videos of our CGT weekend at Geoff Wat's in Deux Sevres in 2009. There is an account of it with various pics and links to all the videos on the Forum somewhere - I will look for it. I didn't know that posting them on YouTube meant that they were publicly available for ever, but there you go!

Phil
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philkelly



Location : Vienne, France and Islington. London

PostSubject: Re: Live diesel 2   Mon Sep 05, 2011 11:30 am

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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Live diesel 2   Sat Sep 10, 2011 8:01 pm

All this diesel activity... makes you want to go out and run trains.....

Diesel of course.... Laughing

I got mine out today following a new fuel tank and replacing a broken clutch spring which was the source of the plates biting too early. Now they slip a bit. Rolling Eyes

Impressed with pulling power of Detritus I put out a few wagons to pull.

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Paulus



Location : The Netherlands

PostSubject: Re: Live diesel 2   Sun Sep 11, 2011 8:56 am

Looks great. Impressive pulling power!

Reminds me to bring earplugs in November... lol!

_________________
Paul pirat
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Bearcastle



Location : Brie

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 10:58 am

Carl what kind of diode do you need for the 3 phase bridge rectifier ?
I have another question about the amp the diode need to resist ?

Do you use a common diode or some other type like a schotty, they have a lower voltage as we don't generate more than 20 volt.

Edit : Schottky diode have an average loss of 0,3 volt, the common diode have a loss of 0,7 volt.
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ralphbrades



Location : Derby UK

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 4:29 pm

I personally would use a schotsky power diode in preference to a normal silicon rectifier diode. This is because they switch at far higher speed than a normal silicon one -and as we know the faster you turn it the more juice you squeeze from it!

They are a little more expensive at 0.40p for a 3 Ampere one -which would bring the cost of your 3 phase rectifier up to 2.40p. If you are really pushing it -then a 50 Ampere 1000 Volt 3 phase bridge rectifier could be yours for 3.99p from eBay.

They also sell a 300 Ampere one -which I might buy and use in my next loco simply for the horrified looks affraid on the faces of my friends!!!

regards

ralph
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 5:02 pm

I am using 6 ordinary tiny 1 amp silicon rectifier diodes. They work just fine and cost me nothing.

You can for ease of use and construction buy encapsulated 3 phase rectifiers (like a bridge rectifier but with 6 instead of 4 in a solid pacakage).
These are inexpensive when bought from abroad. Cool

The rest is luxury and very fine tuning..... 300mV loss as apoosed to 700mV....faster switching....no heat/current drain..... study

It's not something I need at the moment.

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dufrok



Location : Ireland

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 6:35 pm

On the subject of rectifiers,

do I need anything between a Torpedo 850 motor and a Viper Eco27?

Also, the fuel tank I am using has no primer button on it, I'm having difficulty

starting the engine. Should I get a tank with a button?
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ralphbrades



Location : Derby UK

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 6:56 pm

You shouldn't need any sort of rectifier -as the 850 is being used as a dynamo and will only produce DC flux. I would recommend a large smoothing capacitor and voltage regulator though.

My fuel tank does not have any form of primer either -I stick my thumb over the carb intake and gently wind over the engine until the fuel has been sucked to the carb.

regards

ralph
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dufrok



Location : Ireland

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 7:09 pm

Thanks Ralph, will give that a go.

Any suggestions on the capacitor and voltage regulator?

I can understand the idea, but thats as far as it gets

Liam.
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 7:40 pm

I found that a smoothing capacitor and/or voltage regulator are not necessary.

The 'green monster' doesn't have either and the DC output feeds straight into an Electronize speed controller.

I did a whole load of basic bench tests with this and published them on You Tube (Guette) to save people re-inventing the wheel.

The raw DC from the 850 is more than acceptable to drive DC traction motors such as LGB/Aristo etc bogies direct.

I would say smoothing is option.

A fuse is essential though... Exclamation

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dufrok



Location : Ireland

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 7:53 pm

Thanks Carl,

fuse between 850 and esc, 3 amps??
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 8:36 pm

Check the rating of the ESC but that should be ok, even a bit less maybe because two motor bogie shouldn't draw 3 amps. Mine (Aristo on green monster) draw less than 1 amp each.
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dufrok



Location : Ireland

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 9:08 pm

Ta Carl,

some progress being made here.

If anything exciting happens I will post a few pics.
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KleineDicke



Location : Deep in the Heart of Texas (Houston)

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 9:29 pm

I use what's called a Poly Switch as a fuse on my battery powered locos. It's a circuit breaker that automatically resets. I think they are commonly used in HiFi Speaker circuits. They look a bit like a capacitor.

_________________
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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ralphbrades



Location : Derby UK

PostSubject: Re: Live diesel 2   Thu Sep 15, 2011 9:40 pm

Carl:

I tend to be "overkill" -but that is me! My record player runs off batteries and it has a voltage regulator to supply the correct DC to the motor -as I said extreme overkill...

I have not run an Electronize ESC from a dynamo -I do know that Dimension Engineering specifically state that if you do use a dynamo then there should be a battery "floating" between the dynamo and the ESC. So, yes, I will agree that smoothing could well prove to be optional. When I am testing new builds I fit circuit breakers rather than fuses -this does remove the acute embarrasment of running out of fuses...

Liam:

IF you want a smoothing cap then something around 2,200uF and 63Volt and the voltage regulator would be an LM338T which can be "tuned" to anywhere from 1.2 Volts to 38 Volts. Anton uses a specific high voltage version in "Shunt" -but they cost about 4 each...

The "Death Box" that contains the capacitor surge bank on the Heilmann is built to dampen a ripple of 19 Amperes from the home made Gramme Ring dynamo and there are 30 Ampere voltage regulators on the feeds to the ESC. I have always considered the Heilmann to be my greatest failure. Once I have finished mucking around with Diesel Mechanical and Diesel Electric generation I will return to it and we will see if I can get more than 15cm per second out of it(!)

regards

ralph
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PostSubject: Re: Live diesel 2   Today at 6:18 pm

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