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Burnmafingers

Stuart Turner compressor -- painted

Ok, so its not strictly steam but it could be driven by a decent engine. These don't seem to come up very often and information seems to be equally scarce.
Its in tidy enough condition but there are paint issues around the unit that could do with sorting and its painted all one colour which irks me somewhat. In its normal enviroment this would be put to work so paint finish is not an issue but now its mine I'll see if I can make it a bit prettier  






Turned by hand you can feel that it has good compression, reckon a Mamod Minor may struggle to run this!
Stripped it down to parts (pistons came out later) bar the end cap holding the crank bearing on one end. Tried 'persuading' it to come off but it was reluctant so for fear of damaging the bearings it stayed as it was.




Stripped off the paint, ready for derusting.


classixs

Very nice Monty

Looking forward to see it build pressure, am certain it will work a treat...
St. Paul steam

Good job Mate, you sure stripped t down to the Brass tacks, looks professionally done .
calypso

Yes, very nice indeed.

You could run it off a steam engine and use the air to power a water pump or another engine.
MrMamod

Nice one Monty and one of the Stuarts i have longed for and di come quite close to a cheap one a few years back as it belonged to a friend and i saw it when i went to see him to then be told sorry mate it has just been SOLD on Ebay     ..
STEAMPROPULSION

For sake of originality, my Stuart compressor, ex-works, is painted black.
MrMamod

STEAMPROPULSION wrote:
For sake of originality, my Stuart compressor, ex-works, is painted black.


Yes the one my friend HAD was also painted/sprayed Black     ..
Burnmafingers

STEAMPROPULSION wrote:
For sake of originality, my Stuart compressor, ex-works, is painted black.


Ooh, part of mine will be black but the rest will be  green that will be an attempt to match it colourwise with my Stuart No.9. I fear it may be a little too bright and lairy  

I don't suppose you know the various thread sizes on this compressor Giovanni?
STEAMPROPULSION

Burnmafingers wrote:
STEAMPROPULSION wrote:
For sake of originality, my Stuart compressor, ex-works, is painted black.


Ooh, part of mine will be black but the rest will be  green that will be an attempt to match it colourwise with my Stuart No.9. I fear it may be a little too bright and lairy  

I don't suppose you know the various thread sizes on this compressor Giovanni?

I succeeded running the compressor using a toothed belt drive coupled to a washing machine big electric engine. I doubt that the N°9 will be able to do a decent job with this compressor, unless yours is a pretty tired one.
I remember having had a hard time sorting out the threads (but I succeeded; but that was a long time ago). There is no trace of the Compressor in the Stuart engines thread chart.
Burnmafingers

STEAMPROPULSION wrote:
Burnmafingers wrote:
STEAMPROPULSION wrote:
For sake of originality, my Stuart compressor, ex-works, is painted black.


Ooh, part of mine will be black but the rest will be  green that will be an attempt to match it colourwise with my Stuart No.9. I fear it may be a little too bright and lairy  

I don't suppose you know the various thread sizes on this compressor Giovanni?

I succeeded running the compressor using a toothed belt drive coupled to a washing machine big electric engine. I doubt that the N°9 will be able to do a decent job with this compressor, unless yours is a pretty tired one.
I remember having had a hard time sorting out the threads (but I succeeded; but that was a long time ago). There is no trace of the Compressor in the Stuart engines thread chart.


Ok, thanks for that.
I must admit, you are probably right about the No.9 struggling to run it.

Think I read somewhere that the compressor supplies 2200 cubic inches of air per minute at 1700 Rpm, could be wrong though, information seems hard to find.
STEAMPROPULSION

Burnmafingers wrote:
STEAMPROPULSION wrote:
Burnmafingers wrote:
STEAMPROPULSION wrote:
For sake of originality, my Stuart compressor, ex-works, is painted black.


Ooh, part of mine will be black but the rest will be  green that will be an attempt to match it colourwise with my Stuart No.9. I fear it may be a little too bright and lairy  

I don't suppose you know the various thread sizes on this compressor Giovanni?

I succeeded running the compressor using a toothed belt drive coupled to a washing machine big electric engine. I doubt that the N°9 will be able to do a decent job with this compressor, unless yours is a pretty tired one.
I remember having had a hard time sorting out the threads (but I succeeded; but that was a long time ago). There is no trace of the Compressor in the Stuart engines thread chart.


Ok, thanks for that.
I must admit, you are probably right about the No.9 struggling to run it.

Think I read somewhere that the compressor supplies 2200 cubic inches of air per minute at 1700 Rpm, could be wrong though, information seems hard to find.

According to the 1978 Stuart Catalogue it is rated at 2200 cu. in. @ 1400 r.p.m., for pressures up o 60 lb.
..."for electric drive 1/4 h.p. motor is generally used".
Burnmafingers

Thanks for clarifying that ^^^  
Burnmafingers

A picture of the valve arrangement which is quite simple really.
Just a couple of springs with discs sitting on the end that cover the  holes in the plate that sits atop the bores. the springs then sit in recesses in the top housing which are also the ports for thecompressed air to exit.







The piston, rod and bearing assemblies.
Note the extensions on the lower bearing cap to promote lubrication through splashing in the oil bath in the base of the unit. The slots and the etching on the bearing faces all help the cause also.



Had a bit of an incident with the pistons when taking to pieces. The bearing caps were undone and the head was off and like a fool I pushed the pistons down the bores, just to see how tight a fit they were. As the pistons were already halfway in the bores, the lower piston rings soon exited the bores and need recompressing to get them back in.
Problem was, the crank was still in place right in the way and was impossible to remove because where ever I put them (bearing in mind they were still fitted) the crank webs fouled the con-rods or upper bearing half.
Luckily, over a couple of evenings, I managed to compress the rings with the crank in the way and get the pistons back up the bores and out through the top.

Lesson learned there.
kno3

Nice compressor. Thanks for posting the detailed pictures of the valves, I had been wondering what they looked like.

I saw a couple of these compressors on Ebay and thought they would look nice converted to a steam engine. I believe a simple pin could be added to each piston top to open the valves from below (just like the CO2 plane engines) and perhaps change the thin plate valves to more substantial ones.
doug

WOW!!!!!!!!!!!!
Burnmafingers

A bit more progress, paintwork.
Etch primered followed by a couple of coats of regular primer.



Colour coats in enamel.




Mating surfaces cleaned up then oiled and flywheel part polished. A few bits of overspray to sort out  and a small area under the bottom cylinder cooling vane to be touched in as it was hard to blow the paint in there with out causing runs.
The parts will be left to dry for a couple of weeks before re-assembly.
The green does seem rather bright as suspected and have not as yet sat the parts next to the Stuart #9 engine to see how close the match is.
loose nut 45

Looking really great, nice resto thread on an interesting item      
Burnmafingers

Staurt Turner compressor - Completed.

Got this finished eventually.









Weighing in at nearly 3 1/4 kilos, it will make a fine paperweight if nothing else  
kno3

Looks nice. What were these used for, they seem rather large for a model?
Les

That does look very smart indeed.    
redryder

Great piece, Monty !!!!

Gil
Roly Williams

kno3 wrote:
Looks nice. What were these used for, they seem rather large for a model?

It was probably intended as a general purpose workshop air compressor. I don't know what sort of pressure it's capable of but I'm sure it's suitable for jobs like inflating tyres etc.
ozsteamdemon

Just wondering Bore and Stroke of this machine , and maybe a pic next to a Coke can for scale .

Good work on the paint job there Monty !  
Maxwell

Original Factory Built is Green

My Original Factory Built Stuart Air Conpressor like that one is painted in Stuart green and not black.
Burnmafingers

ozsteamdemon wrote:
Just wondering Bore and Stroke of this machine , and maybe a pic next to a Coke can for scale .

Good work on the paint job there Monty !  


Sorry for the delay in replying.

I beleive the bore and stroke are both one inch.

Picture for scale

ozsteamdemon

Thanks Monty !    Looking at the pics , i would have sworn the B & S to be much bigger .
It has certainly come up a treat in its new coat of paint . Good work !
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