Recent Posts

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Engines / Re: Another Galloway 1/6 scale comes to life
« Last post by jeff l on Today at 02:51:33 AM »
nice running engine.
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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by crueby on Today at 02:27:01 AM »
Actually looking forward to seeing the dentist again Friday.

Ah the consequences of mint chocolate chip cookies.

That, or payback from some higher being.  ;D
Probably a plot by the elves to get more of the cookies for themselves!
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From Kits/Castings / Re: Strictly.... Hot Air
« Last post by Mcgyver on Today at 02:14:44 AM »

As this is an open thread please post any Hot Air Engine related builds or pictures of your engines here.

Lots of hot air here, just ask my wife.

I didn't see any Rider Ericsson models, so thought I'd put some up of one I made, probably 10 years ago now.  Its great runner, pumps water well.  A few deviations from the drawings, the power cylinder I machined and then lapped the bore.  For the piston I shrunk some bronze rings on the AL piston and turned them in situ.  My thinking was to get good performance it needed minimal clearance, minimal contact area between the cylinder and piston (rings) and both should be very round, straight and smooth





















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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by zeeprogrammer on Today at 02:04:55 AM »
Actually looking forward to seeing the dentist again Friday.

Ah the consequences of mint chocolate chip cookies.

That, or payback from some higher being.  ;D
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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by crueby on Today at 01:57:49 AM »
Hi Chris,   just a quick thought...should the props turn in different directions to stop the turtle turning turtle ? or do the tubes prevent this happening ? or is the weight distribution avoiding that ? just pondering...torque reaction and all that (that i have no knowledge of).......
willy
Hi Willy,
Normally I would set them up for counter rotation, especially on a fixed prop or a high speed surface penetrating prop, but for this model its not important enough to justify the extra mechanisms. The steerable nozzles help prevent prop walk and torque steer, plus this is a low speed model. That said, we'll see how it behaves! I'd have it ready to go by now, if I wasn't fighting this #@$-*\+ tooth! Keep having to take breaks, more aspirin... Actually looking forward to seeing the dentist again Friday.
Chris
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Vehicles & Models / Re: Shay Locomotive
« Last post by Dan Rowe on Today at 01:37:17 AM »
Chris, I thought a boogie was a dance... I really hope my Shay does not start dancing down the track.

Per yes we call a bogie a truck on this side of the pond.

I have to do the brake hangers again I was not looking at the detail drawing. I used the assembly drawing which I did not update after I found the detail part.

I made a brake shoe key today photos tomorrow.

Cheers Dan
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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by steam guy willy on Today at 01:34:37 AM »
Hi Chris,   just a quick thought...should the props turn in different directions to stop the turtle turning turtle ? or do the tubes prevent this happening ? or is the weight distribution avoiding that ? just pondering...torque reaction and all that (that i have no knowledge of).......
willy
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From Kits/Castings / Re: RLE questions!
« Last post by rick41 on Today at 01:19:59 AM »
Perhaps Phosphor Bronze?  Just a guess!
Rick
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From Plans / Re: Brian does Ridders flame eater
« Last post by Brian Rupnow on Today at 12:14:52 AM »
My three bearings came in today. They cost $23.00 total and have seals on them. I'm not going to rush to take the seals out at least until I am set up to do some comparative tests to see how easily they spin. The key issue is that they fit the crankshaft and con rod pin properly. Tomorrow I will put the counterbores in the bearing supports and maybe build a con rod. I am still a bit undecided what material to use for pistons. Jan Ridders drawings indicate that you can use graphite OR cast iron. Nobody in Barrie sells machinable graphite, and I already have some cast iron left over from other projects. I may go with cast iron and if it don't work I can switch to machinable graphite after the fact.
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Chatterbox / Re: Talking Thermodynamics
« Last post by steam guy willy on February 21, 2018, 11:45:00 PM »
HI MJM, still looking in......Does your meths burner give you the most amount of heat possible as i have seen drawings where the meths is heated and evaporated ,then ignited under pressure into the boiler ?? these are ideas from 1901 though !! also is the short letter about aluminium true and if so when you heat the AL and Antimony to the lowish temperature  to melt ,how do the get to the higher temp ?? or do the two metals freeze on contact ?
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