SEL Steam Launch Unit

[Jasonb]

Another Little one completed. This time it's a replica of the SEL "Steam Launch Unit" Actually made by Midland Models in the 1950s.



As usual redrawn in metric using Alibre with a bor eof 11mm and stroke of 13mm.



Made on manual machines. I won't go into build details as I will probably write this one up for ME&W.





Seems to run nicely, jump to about 1:40 if you don't want to hear it drumming on the bench!

<a href="https://www.youtube.com/watch?v=ja2KSbXFutw" target="_blank">http://www.youtube.com/watch?v=ja2KSbXFutw</a>

[Sanjay F]

Nice job, pretty much a straight copy of the original and runs sweetly

I must build myself an oscillator ....... maybe next project......

[CI]

 

[Michael S.]

I wear glasses, but I still have to look three times to distinguish the real object from the CAD simulation.

Excellent workmanship 👍

Michael

[PaulR]

Very nice.

Is there a grub screw through one of those bosses on the flywheel or are they just decorative/filling up the space within the frame?

[Jasonb]

Yes, the boss nearest the crank is a larger diameter and drilled for an M3 grubscrew. The original had a slotted grub screw in the same location.

That same boss locates on the back of the bearing that the crank arm is against so stops the crankshaft moving lengthways. Th eother does not really do anything but was a feature on the original.

[PaulR]

Yes, the boss nearest the crank is a larger diameter and drilled for an M3 grubscrew. The original had a slotted grub screw in the same location.

That same boss locates on the back of the bearing that the crank arm is against so stops the crankshaft moving lengthways. Th eother does not really do anything but was a feature on the original.

I can see why they did two bosses on the original, looks much better than having a gap. I need to make a widget for slotted grub screws, they always feel more positive to me than Allen sockets.