Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Model & Toy Steam Engines – Stirling Cycle – Flame Lickers – Small Antique Originals => Topic started by: gbritnell on April 09, 2019, 06:29:53 pm

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: Jim on May 06, 2019, 10:50:16 pm

George your machining skills are just incredible. Do you magnifying aids when you are machining your miniatures?

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: Roscoe on May 06, 2019, 10:46:36 pm

Miniature engines always amaze me, nice job.

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: txlabman on April 26, 2019, 09:09:25 pm

Awesome George.

Gil mentioned that you may be exhibiting one or both of these tomorrow.

Looking forward to meeting you tomorrow at NAMES.

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: gbritnell on April 21, 2019, 06:15:25 am

Yes, there is a center groove for the intake that aligns with one or the other of the ports. At the ends there is a flat that uncovers the opposite port for the exhaust cycle.
gbritnell

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: KNO3 on April 21, 2019, 02:32:02 am

The upright engine looks very scale. Where is the exhaust, through the piston valve?

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: Stoker on April 20, 2019, 09:12:00 am

What I'd like to know is where in the heck did you find such a large penny?!?!   ;c)

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: gbritnell on April 20, 2019, 08:02:20 am

I made the horizontal so that just begged for a vertical. The same dimensions for all the parts except the base, lower cylinder head and uprights. The uprights are threaded M1.2 x .25 at the top and tapped the same size at the bottom. They are held from underneath by screws.

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: classixs on April 11, 2019, 09:09:28 am

Quote from: Nick on April 09, 2019, 10:34:58 pm

This is Awesome!

Couldn´t word it better, what an amazing job you did there (https://emoji.tapatalk-cdn.com/emoji7.png)

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: MasonvilleEngines on April 11, 2019, 04:20:14 am

Saw it running on YouTube, Nice!

Len.

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: RON on April 10, 2019, 03:54:36 am

That is fantastic really wish i could make something like that just hard to believe excellent

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: Swift Fox on April 10, 2019, 03:34:35 am

Wow George you certainly have a flair for the miniature stuff!, one of those would sit very well among my other tiny engines.  ;)

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: SlowArrow on April 09, 2019, 11:06:22 pm

Nice little engine.

Title: Re: Huff and Puff steam engine (very Tiny)
Post by: Nick on April 09, 2019, 10:34:58 pm

This is Awesome!  8)

Title: Huff and Puff steam engine (very Tiny)
Post by: gbritnell on April 09, 2019, 06:29:53 pm

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Huff and Puff (Tiny)
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Gentlemen,
While I was waiting for aluminum to be delivered I needed something to keep my hands occupied. When the thread about the Huff and Puff steam engine was started by Doc I went to the link to have a look at the original that Phillip Duclos created. I took all the dimensions and as has become my habit I scaled them down to 3/4 of the actual dimensions. That gave a bore and stroke of .1875 x .094. The small hex bolts that hold the front head and the cylinder to the base are M1.0 x .25 and the bolts that connect the rod and valve strap are M.08 x .20 (.032 diameter) The base is .785 long and overall it's 1.25 long.
I built everything to the drawings and it would barely run so I had a look at the valve and changed the timing on it. [attachimg=1][attachimg=2][attachimg=3][attachimg=4][attachimg=5][attachimg=6][attachimg=7][attach=8][attachimg=9][attachimg=10][attachimg=11][attachimg=12][attachimg=13][attachimg=14]
It will run by breath but just barely although I had it well oiled for running on the video.
gbritnell