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Looking for toy steam engine dynamo advice


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  #1  
Old 11-13-2018, 08:23:20 AM
N0QBH N0QBH is offline
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Default Looking for toy steam engine dynamo advice

I'd like to add a dynamo to my Jensen 75 and would like something with a reasonable amount of LED output.
Suggestions?
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  #2  
Old 11-13-2018, 08:41:21 AM
Nick Severson Nick Severson is offline
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Default Re: Looking for toy steam engine dynamo advice

Watch for a used Psantama Blue Thunder on ebay.
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Old 11-13-2018, 01:35:17 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Looking for toy steam engine dynamo advice

I believe Jenson makes a generator of their own too. Not sure if Mamod or Wilesco made one.
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Old 11-14-2018, 12:11:40 AM
Nick Severson Nick Severson is offline
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Default Re: Looking for toy steam engine dynamo advice

Quote:
Originally Posted by Nick Severson View Post
Watch for a used Psantama Blue Thunder on ebay.
I need to make a new/better video but this is what my Blue Thunder can do. A Jensen 15 lamp is no comparison...

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  #5  
Old 11-14-2018, 08:02:50 AM
N0QBH N0QBH is offline
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Default Re: Looking for toy steam engine dynamo advice

OK, I'm impressed!
I tried using the web link to contact the maker of Blue Thunder Generators, but it appears the web site email isn't working.
Anyone know the secret?
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Old 11-14-2018, 09:24:12 AM
Thaumaturge Thaumaturge is offline
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Default Re: Looking for toy steam engine dynamo advice

Just use a good DC motor, such as a capstan drive motor out of a tape deck, or an Axis drive motor out of an analog X-Y recorder. Best commercial motors are made by Bueler. Check your local university surplus depot for old X-Y recorders for cheap.
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Old 12-17-2018, 07:55:19 AM
N0QBH N0QBH is offline
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Default Re: Looking for toy steam engine dynamo advice

Adapted a Buehler DC motor to a generator and got it to light a blue LED quite brightly - provided I could keep a good head of steam on the Jensen 75.
It likes about 15 psi to handle making electricity and still have a little headroom. It's obvious solid fuel isn't going to be a long term solution.

What type of gas burner do you recommend for retrofitting a new Jensen 75?

Mike
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Old 12-17-2018, 05:57:12 PM
Nick Severson Nick Severson is offline
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Default Re: Looking for toy steam engine dynamo advice

BIX gas burners are my favorite. You will have to remove the shelf that holds your 75's Esbit tray, just drill out the rivets.

https://www.ministeam.com/acatalog/Burners.html

I have one of their gas tanks, but rarely use it. Instead I use the valve that screws directly onto the disposable cans.
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Old 12-17-2018, 09:04:01 PM
N0QBH N0QBH is offline
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Default Re: Looking for toy steam engine dynamo advice

Quote:
Originally Posted by Nick Severson View Post
BIX gas burners are my favorite. You will have to remove the shelf that holds your 75's Esbit tray, just drill out the rivets.
Which size burner would be used in a Jensen 75?
I see 50mm, 67mm and 120mm.
My tray is 4" (100mm) long.
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Old 12-17-2018, 09:26:01 PM
Nick Severson Nick Severson is offline
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Default Re: Looking for toy steam engine dynamo advice

I can't remember off hand if the longer one fits in the 75, I'll take a look for you when I get home...

But until then I found this post where you don't even need to remove the esbit tray shelf, just bend the front down instead. Andy said he used both the 50mm and a 4.5"

https://www.tapatalk.com/groups/mode...ix+75#p1274588

There is also a guy in the UK that custom makes gas burners very reasonably and I've been happy with the ones I have from him.
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Old 12-17-2018, 10:19:55 PM
N0QBH N0QBH is offline
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Default Re: Looking for toy steam engine dynamo advice

Does this store on EBay look useful?
I think the 100mm aluminum burner will fit directly.

https://www.ebay.com/str/Green-Engin...1&_sop=1&_vc=1
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Old 12-18-2018, 07:48:09 AM
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Default Re: Looking for toy steam engine dynamo advice

There is also a guy in the UK that custom makes gas burners very reasonably and I've been happy with the ones I have from him.[/QUOTE]

Could I get the contact info for the UK burner builder?
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Old 12-18-2018, 09:38:51 AM
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Default Re: Looking for toy steam engine dynamo advice

I don't know what the power out is from this is, but certainly enough for an incandescent light bulb.
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Old 12-18-2018, 10:13:27 AM
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James Bosma James Bosma is offline
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Default Re: Looking for toy steam engine dynamo advice

https://www.pmmodelengines.com/shop/...amo-generator/

Here is a nice one
Buy as a kit or already to go
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Old 01-08-2019, 12:14:04 PM
classixs classixs is offline
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Default Re: Looking for toy steam engine dynamo advice

I agree completely with James above, you will not find a nicer dynamo than the PMR, especially when it comes to efficiency and pricing.

However, it does put a severe load on the engine, once it gets some bulbs hooked on, and i would think a #75 is pushing it, if one intends to use up the full potential of that dynamo?

Personally i would aim for a used Psantama Blue Thunder (or a Black Rhino), as recommended by Nick above, as they´re nice "plug´n´play" solutions.

As a very close second, and a 1st.in terms of pure output (the PMR aside), i would get one of the Austrian generators made by Kurt Berger.
They are very well made highly efficient (AC) generators, and comes with 3 different pulleys, which allow for quite a bit of versatility, in terms of which engines one wants to power them from.

He does ship worldwide, but will have to be messaged for a quote to the US.

https://www.ebay.de/itm/GENERATOR-An...e/163465820066

https://www.ebay.de/itm/GENERATOR-An...e/163472106814
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Old 01-08-2019, 12:52:14 PM
Nick Severson Nick Severson is offline
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Default Re: Looking for toy steam engine dynamo advice

Forgot about the Austrian genny's, have both the standalone and the wood-base with lamp-post, and like you said come with a nice selection of pulleys
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