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Author Topic: Robbo...  (Read 16706 times)

Offline Stilldrillin

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Robbo...
« on: October 09, 2011, 06:19:49 AM »
Looking among the inmates on my orphan shelf, this one said "hello"!  :wave:

An all brass, Robinson type hot air engine. Non runner, as usual. Should be no real problem.....  :thumbup:


Does anyone recognise the design? Is it made from any available drawings?


http://i110.photobucket.com/albums/n95/Dayjo/P5150002.jpgRobbo...


http://i110.photobucket.com/albums/n95/Dayjo/P5150005.jpgRobbo...


http://i110.photobucket.com/albums/n95/Dayjo/P5150003.jpgRobbo...


http://i110.photobucket.com/albums/n95/Dayjo/P5150004.jpgRobbo...


Just over 6" tall + plinth. 3" dia. flywheel.

Thought never to have run....... But been very well/ regularly polished before it arrived here.  ::)

Anyone got a clue/ idea to it's parentage? Pleese!

David D

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Offline Stilldrillin

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Re: Robbo...
« Reply #1 on: October 11, 2011, 12:05:33 PM »
Hmmm......  :scratch:

Over 100 hits, and not one comment. Guess it must be unique!  :thumbup:

Wonder what it's story is. If only it could talk......  ::)

David D
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Offline Brass_Machine

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Re: Robbo...
« Reply #2 on: October 11, 2011, 12:10:00 PM »
Never seen it before. Looks cool tho...
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Offline Bluechip

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Re: Robbo...
« Reply #3 on: October 11, 2011, 03:24:23 PM »
Hi Dave

Interesting little engine, just had a look through my books, nowt seems to match.

Would guess at a home brew one-off.

What does the plate say ???           'DEE' ???

Take it off. Maybe a bit of paper underneath, ..... big black X treasure buried here. ...  :loco:

Cute though. Like the rolled bits on the firebox. If that's what it is ??

BC

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Offline Stilldrillin

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Re: Robbo...
« Reply #4 on: October 11, 2011, 04:59:10 PM »
Heyup Dave.
The plate says ROBBO. Either the maker, or 'cos it's a little Robinson.  :scratch:

Probably, never run...... The hot cap was clean/ not sooty, before I fired it.

Much too rapid heat transfer to top end. Needs a barrier of some sort.

The firebox looks rolled, though I doubt it. The nameplate is pressed. Letters raised.

http://i110.photobucket.com/albums/n95/Dayjo/P5150006.jpgRobbo...


David D
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Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline sbwhart

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Re: Robbo...
« Reply #5 on: October 12, 2011, 01:47:46 AM »
I'm watching Dave can't waite for you to get the little orphane running.

Just how big is that prphanage of yours. ?

Stew
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Offline DMIOM

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Re: Robbo...
« Reply #6 on: October 12, 2011, 04:50:48 AM »
Quote from: Stilldrillin on October 11, 2011, 04:59:10 PM
...... The hot cap was clean/ not sooty, before I fired it. .....The firebox looks rolled, though I doubt it........

It didn't by any chance smell of cordite when fired, did it? - it just puts me in mind of a small shell cartridge case?

Dave
« Last Edit: October 12, 2011, 05:57:25 AM by DMIOM »
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Offline Stilldrillin

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Re: Robbo...
« Reply #7 on: October 12, 2011, 01:07:11 PM »
Stew.
I don't intend this to be a resurrection posting. I've precious little time to spend building Gold Blend, as it is!  ::)

I might have a rummage round, in a day or two, and take a few orphanage pics. There are still a few left in there....  :thumbup:


Dave.
I don't think this piece of 3.5" bore brass ever went bang..... I would expect a case to have a tapered bore, and the little flange is neatly soldered on.

http://i110.photobucket.com/albums/n95/Dayjo/P1010583.jpgRobbo...


In fact, all the silver soldering and workmanship is first class..... But (I think) the design is wrong, in the detail.......

http://i110.photobucket.com/albums/n95/Dayjo/P1010585.jpgRobbo...


The short displacer cylinder is much too thick wall brass, and a regenerator displacer wastes too much space in a little engine like this.

My thoughts....... Unless anyone knows different?  :smart:

David D
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Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Stilldrillin

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Re: Robbo...
« Reply #8 on: May 02, 2012, 05:55:49 PM »
Hmmm..... Some seven months gone now.  :scratch:

But! I love it, when a plan slowly starts to come together.  :smart:

I was browsing YouTube the other day, when a thumbnail pic caught my eye..........


 

It's another Robbo!  :bugeye:  With the date of Model Engineer's plans.  :D

So, a quick look through Ebay. And, this arrived today........

http://i110.photobucket.com/albums/n95/Dayjo/After%202012/P1020363.jpgRobbo...


Another step, in the right direction........  :thumbup:

David D
« Last Edit: June 08, 2012, 02:03:59 AM by Stilldrillin »
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Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline sbwhart

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Re: Robbo...
« Reply #9 on: May 03, 2012, 01:23:54 AM »
Nice bit of detective work Dave

A bit like who do you think you are  :D

Now are you going to get it running.

Stew
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Offline Stilldrillin

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Re: Robbo...
« Reply #10 on: May 04, 2012, 02:26:48 AM »
Quote from: sbwhart on May 03, 2012, 01:23:54 AM

Now are you going to get it running.

Stew

Just realised......... I've finally finished (most) of my winter, workshop round tuits. YAY!!!  :D  :D

Time to give it a coat of looking at.  :thumbup:

David D
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Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!
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