Author Topic: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine  (Read 8379 times)

Offline bent

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #150 on: April 20, 2020, 04:27:40 PM »
Good job Jo!

Online Jo

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #151 on: April 22, 2020, 04:14:08 PM »
One last little tap before adding the copper feed pipe for the pump... This is the cylinder drain cock most of it was done free hand with a graver, the taper used an existing taper reamer I have and I set over the top slide to match it on the taper plug  ;)


It might be time to start negotiating another set of castings it might need to be quick before someone finds out I have turned down a set of Stuart 600 castings  :thinking:

Jo
Enjoyment is more important than achievement.

Online Jo

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #152 on: April 23, 2020, 02:15:31 PM »
The pump is now painted and the piping is in place to feed from the barrel into the engine and a drop which will have a piece of clear tubing feeding back to the barrel when in use and left off for normal display purposes. I have noted that the air chambers are not fitted to most engines so until I find a suitable piece of something to make two out of I have blanked off the two mountings for them.

So I am calling that done  :wine1:

Jo
Enjoyment is more important than achievement.

Online Bluechip

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #153 on: April 23, 2020, 02:22:08 PM »
 :ThumbsUp:

Nice .... mmmmm   :)

Did you get the bit of broken bung out of the barrel thingy ??

(Just stopped for a pot of slurp here  :DrinkPint: . Just finished some potting on in the greenhouse .... 39oC )

Dave

Offline Johnmcc69

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #154 on: April 23, 2020, 02:39:11 PM »
 :ThumbsUp:
 Nice work Jo!

 John

Online Jo

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #155 on: April 23, 2020, 03:06:24 PM »
Thanks Dave and John  :) ,

Did you get the bit of broken bung out of the barrel thingy ??

. Just finished some potting on in the greenhouse .... 39oC

Yes all out.

Some of my Cues have just decided to move out to the greenhouse  ::)

Jo
Enjoyment is more important than achievement.

Offline Admiral_dk

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #156 on: April 23, 2020, 08:16:11 PM »
Really great result Jo  :praise2:   :cheers:

I also like the "Barrel thingy" - though it is both fitting and kind of a distraction  8)

Online scc

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #157 on: April 23, 2020, 09:55:46 PM »
Lovely engine Jo..
i have enjoyed the build.  Thank you for your usual detail. :cheers:     Terry

Online MJM460

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #158 on: April 23, 2020, 11:40:00 PM »
Hi Jo, that engine has come out very nicely.  A great job of a beautiful finish.

Those air chambers are for pulsation dampening and also to reduce cavitation damage due to the low pressure at the inlet due to acceleration losses.  With such small pipes, there is not much mass, and with slow speed engines, the pulsation forces are generally low enough to ignore.  They are easily added later when you have the material without any issues.

A larger engine, with a long inlet or discharge pipe can be a different matter, and those pulsation are quite capable of damaging piping and even engines.

I am still admiring those pictures and learning some of the features you have included to achieve such great appearance.

MJM460

The more I learn, the more I find that I still have to learn!

Online Jo

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #159 on: April 24, 2020, 07:42:51 AM »
Thanks Guys  :)

I also like the "Barrel thingy" - though it is both fitting and kind of a distraction  8)
Blame Dave for that, he is the Scotch drinker  :cheers:



Someone has left a set of castings on the Dining room table. :thinking:

Jo
Enjoyment is more important than achievement.

Online Bluechip

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Re: Camden 3" scale Rider-Ericsson Hot Air Pumping Engine
« Reply #160 on: April 24, 2020, 09:04:59 AM »

Blame Dave for that, he is the Scotch drinker  :cheers:

     ;D