coffee cup Stirling

Hi all have decided to attempt the Jan Ridders coffee cup stirling engine and have downloaded the plans, to study them and work out a material list. more up dates to follow when shed times permit

regards tom b

Good luck with it Tom.

Neil

Looking forward to seeing it Tom, I have the plans but have yet to get 'round2it'... although some one posted me a pic of a 'round2it' last year...

George.

Hi all

have made a start on the coffee cup engine dispacer ends used some 'scrap' aliminium plate marked it out,made a mandrel to clamp rough the plates together and turned to size in lathe.some photos in album but unable to upload to this thread.Any clues please ?

think i,ve got it .picture not in order.why are they upside down ?

Edited By tom bates on 22/01/2016 17:39:42

Looks like you have taken them on a phone which rotated them automatically? This rotation doesn't always actually 'stick' to the file when its uploaded.

Neil

Neil thanks for the prompt reply. I took these photos on my i pad should I be using a seperate camera to upload pics to avoid this problem ?

Hi Tom

I have had similar probs with pics; what I end up doing is to take the pic with camera / phone, save it to 'My pictures' album as JPEG then can alter it with whichever photo editing software you have... crop / rotate etc. I also resize all pics using 'FSResizer' to approx' 640 x 480 then 'save' , then I can use as needed to 'upload' to album, also saves a huge amount of space on your hard drive. Pics can also be resized in the reply box by clicking pic until it shades in blue then click again to get resize squares on the borders, alter accordingly then click again to embed... at least that's the way I do it, others may have different methods.

George.

.... and here's me thinking it was one of those new-fangled machines that Arc came up with - designed for ceiling mounting to save workshop space.

Bandersnatch. if only they did i,d buy the mirror image tools to fit on the floor to double my shed size

Mecman48 I,m doing something very similar to what you suggest,but on the posting i made today in what did you do today I posted 6 photos 2 were inverted and all were in the wrong order maybe i should be using alap/desk top to upload photos, all comment/suggestions welcome

Made the 6 x18 mm spacers for the displacer cylinder today easy turning exercise (really?) only broke 1x2mm tap😢 so only took photo of a assembled displacer

Only problem doing the discs that way, you get a spare hole in the bottom one that you don't really need. A way around that in future, glue (PVA) the plate on a bit of wood, get a small steel disc with a centre hole in it, mount the wood either on a face plate, or a 4 jaw chuck, take the small disc and bring the tail stock up and sandwitch it against the aluminium disc.

Ian S C

Only problem doing the discs that way, you get a spare hole in the bottom one that you don't really need. A way around that in future, glue (PVA) the plate on a bit of wood, get a small steel disc with a centre hole in it, mount the wood either on a face plate, or a 4 jaw chuck, take the small disc and bring the tail stock up and sandwitch it against the aluminium disc.

Ideally the spacers around the displacer chamber should be of an insulating material, some sort of plastic. My LTD motor is held together with 12 x 5 mm Nylon bolts tapped into the top plate.

Ian S C

Ian thanksfor the info, but the reason I did it that way was that my rotary table is too small to fit the displacer disc if I try to fit my 4 or 3 jaw chucks I do not have enough height to fit any tooling

with regard to the spacers I did consider making them from delrin but decided to stick to the plan. Might make delrin at a later date. Cheers Tom b

I made the spacers from hardwood dowels and c/sunk woodscrews into each end. The spacing is not ultra critical and careful marking off should be ok.

Thanks for the idea Gordon.Just an aside I was visiting one one of my companies site where they had to remove a door frame to install some new equipment, came away with lenght of mahogany 4ftx8''x5'' might make the dowels from this!

cheers tom b

p.s its big enough to make the displacer tube.(now theres a thought)

Edited By tom bates on 24/01/2016 18:21:12

Had another idea if i turn the wood to the out side diameter of the displacer plates and machine the top and bottom of the disc to fit in the 2mm anular grove I ,d get a combined spacers and tube in a low heat transfer material,would this this work ? feed back would be appreciated

Started the bearing stand

finished the bearing stand jus t need to trim the thread to length