Sticking Engine M2

[hammer]

Sticking Engine M2. This engine like the last is destined for a model paddle steamer. The design brief is must be self starting & reversible, so twin double acting as before. Paddlers are unstable so low center of gravity, driving by gears 3 to 1 reduction. No castings.
The plans  are in my head and I have made a start. Geoff

[hammer]

I realise my engine is quite simple, especially to you experts, but as I said I am only a learner. Just an old carpenter who thinks 1/16" is a fine measurement. This is not a show engine by any means, it will have to work & work. I will post photos of the progress. Geoff

[Don1966]

Looks interesting to me Geoff. I will be following you on your venture. Just keep the photos coming..       

Don

[steamer]

No Worries Geoff.

No one is born knowing this stuff.  Its a learning process

I've pulled up a chair and I'll be watching!

Dave

[Alan Haisley]

Go to it, Geoff.

[hammer]

Thank you I need a little encouragement. Below the state of play. Geoff

[Stilldrillin]

Watching quietly, Geoff........

Looking good so far! 

David D

[Don1966]

That's very interesting Geoff, a cylinder on each side. The gear is what I don't quite understand. Are you powering the gear with the cylinder?

Don

[hammer]

Thats right don, the cylinder of brass will become the crank arms. Seperated from the engine, to the left. The large gear in first photo will be fixed to the paddle shaft. The ideal ratio is 3to1 reduction, the gears from my scrap box are a little less. Geoff

[hammer]

Crank completed. Note the arm reduced on the inside so the bearing can be incresed.  Only 3/32" but every little helps. Geoff

[steamer]

Looking Good Geoff!

Dave

[Bezalel]

I'm interested and watching too Geoff.


Are the crank pins 90^o apart or some other angle?

its hard to see in the photo

BeZ

[hammer]

Yes squared at 90deg.  Will post more Monday. Geoff

[hammer]

A little progress monday. Made conrods pistons & bigends. Also had a polish to improve the image. Fitted the key to the shaft & gear. I had to change the bolts which hold the crank brakets, as they fowled the arms. Incresed the size & threaded one plate.  The sharp eyes will note one conrod has been ajusted for length the other not, also the pop marks to denote which side is which.  Geoff

[hammer]

Well I messed  up the frame (I have called it frame as opposed to standerd being horizontal). The draw bolt came loose and the slot drill went into the steam passage.    So back to square one.  Made a new one yesterday. Spent all today lapping the pistons & the port faces almost there. Geoff