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I sould think that would be OK

Thanks Jim I'm sorry to miss you at Harrogate this year I usualy go, but family commitments make it dificult this year, unless their is a change I won't be able to make it. On Friday I took delivery of a 7" flywheel casting from RDG. Good quality a few blow holes on the rim but nothing that...

I built an engine based on the Cygnet Royal same cylinder dia and stroke but different crank and con rod arrangement and external appearance. Only thing I can add is that on an air pressure of 60psi it does 2200 rpm Another point of interest is that if you reverse the air flow in through the...

I've got my chair pulled up Stew

Thought I'd better update the build log 1st making the cast iron cylinder. Turning to size after drilling off set hole The trepanning a groove for some packing, seems to work ok without packing tough, still nice to have the option. Shaft assembly using same method as for the PTFE...

Bugger got that wrong:--- sorry Guys :big: :big: Stew

Thanks Guys Still not 100% happy with it, I took the end play out of the fly wheel spindle to try and get rid of the wobble, and its made it more air hungry, strange but it seems very sensitive to the fly wheel, for some reason it will turn over ok by hand with the fly wheel off put the fly...

Thanks for all you're interest and kind comments Chaps Yes it does look better at slower speed as it bedded in it will run slower at lower psi and that wobbly flywheel will certainly have to be sorted. Ron:- Its such a balls aching job setting the cranks that once I got it running I didn't...

Well:- I thinks I've got this sorted now. I made a new piston from cast Iron, I also re sculptured the base to gain better access. I can now get it ticking over at 5psi and and full pressure of 60 psi it does 850 rpm http://www.youtube.com/watch?v=WmSIJhs8Vgo&feature=youtu.be Stew

Hi Jenesie With mine it took about 20 psi it now runs at about 5 psi. It took me some time to get in running any tight spot will cause problem you just have to chase them out. Good luck Stew

Hi Pete Just read you're thread through great work ? I'm now the proud owner of a 90% complete supper Simplex So its of particluar interest. Cheers Stew

No its as supper Simplex with the Belpair boiler and larger dia cylinders. Stew

Got myself a little project Its a 5" Gauge 0-6-0 Tank Engine to the Simplex design of Nigel Evans. The engine is about 90% complete it was built by a Guy who due to age and Ill health couldn't complete it. Work remaining is the:- plumbing, boiler feed pump, injector, lubricator, bunker...

Hi Jonesie The eccentric is 90 deg infront of to top dead centre. The first thing you have to do is centralise the slide valve travel:- at top dead centre set the eccentric so the front port is just cracking open, wind it to back dead centre and note where the valve is, screw the valve stem in...

Has any one got a copy of Martin Evans' book building the Simplex 0-6-0 Tank or copies of the Model Engineer volume 133 to 134 and Volumes 162 to 163 that covered the build, or a set of drawings that they would like to sell. Thanks Stew

Thanks for you're interest and comments Guys I think you don't realy start to understand an engine untill you start to assemble it and try and get it to run, with this one i'm going through a steep learning curve, I've stripped it down and started to fettle one or two issues with it, the big...

Cheers Jim/Brian Still a bit along the learning curve to go with this engine. To days lesson:- I made the piston from PTFE it seemed a good idea at the time, I know PTFE has some strange properties and that it has a high figure of coefficient of linear expansion, but I though that shouldn't...

Thanks John and Jim Well its getting better with a bit of fettling I can get a couple of minutes out of it when the pressure drops to about 40 psi it stops Hi John:- I'll be round latter in the week with a bit of luck we can have a play with it then, I've spotted one or two things that can be...

Nice one Peter I could hear lots of chuckles on the vid looks a lot of fun. :big: :big: :big: :big: Stew

http://www.youtube.com/watch?v=0KZoRF8AhRU I think I may have run up against the limitation of the design it will only run for a few seconds with my small compressor before it runs out of wind. After all they only ever made two of them i guess thats why. Stew Edited link - Arnold