Author Topic: Huff & Puff  (Read 2040 times)

Offline Doc

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Huff & Puff
« on: April 03, 2019, 03:34:00 PM »
Well I picked my next engine build.

Offline Ye-Ole Steam Dude

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Re: Huff & Puff
« Reply #1 on: April 03, 2019, 03:57:20 PM »
Hello Doc,

This will be an interesting build to follow.

Have a great day,
Thomas

Offline Jasonb

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Re: Huff & Puff
« Reply #2 on: April 03, 2019, 04:11:46 PM »
I hope you will have enough puff ;)

Offline b.lindsey

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Re: Huff & Puff
« Reply #3 on: April 03, 2019, 04:55:00 PM »
I love it Doc. Great project for small lathe and mill as well. Where are the plans available for it? One of the Duclos books from Vintage Press?

Bill

Offline mklotz

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Re: Huff & Puff
« Reply #4 on: April 03, 2019, 05:38:57 PM »
Some inspiration for you.  This is one of my most popular models.  At the grade school presentations I do I let the kids power the engine and they love it.  While walking around engine shows, pull it out of your shirt pocket and impress the guys building stuff with valves bigger than your engine.





I suggest you make a longer blowpipe (mine is six inches) so you can see the engine operating when blowing it yourself.  I've never found an oil light enough and so lubricate it with kerosene which, upon evaporation, leaves behind the mere hint of an oily surface.  (Old timers lubricated their pocket watches by putting a drop of kero on the inside of the back cover.)

Don't forget to add the power takeoff pulley as I did on mine.  I've led several people down the path convincing them that I actually power miniature machines with that pulley. :-)
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Offline kvom

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Re: Huff & Puff
« Reply #5 on: April 03, 2019, 06:06:30 PM »
George will be along to shrink it any minute.   ;D

Offline Roger B

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Re: Huff & Puff
« Reply #6 on: April 03, 2019, 06:25:28 PM »
Excellent Marv, are the drawings available?
Best regards

Roger

Offline Doc

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Re: Huff & Puff
« Reply #7 on: April 03, 2019, 06:33:50 PM »
They are available here.
Shop Wisdom Of Philip Duclos

Offline Doc

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Re: Huff & Puff
« Reply #8 on: April 03, 2019, 10:11:20 PM »
Well here is what I have so far today
I have the cylinder done and the cylinder head.
Also got a goo start on the base.

Offline b.lindsey

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Re: Huff & Puff
« Reply #9 on: April 03, 2019, 10:47:08 PM »
Nice start Doc. I take it you are making two of them.

Bill

Offline yogi

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Re: Huff & Puff
« Reply #10 on: April 03, 2019, 11:27:40 PM »
Very cool Doc!
I'm looking forward to see it come together.  :popcorn: :popcorn: :popcorn:

Offline Doc

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Re: Huff & Puff
« Reply #11 on: April 04, 2019, 12:07:26 AM »
Yes making 2 and am not going to use the NC for any of it. I need to brush up on my manual skills. LOL
Just wanted to try and make it through this build and do it only on the lathe and conventional mill. So far so good on that account. One I am going to try and make a cylinder with a weighted piston that you can pull up and gravity and the weighted piston will supply the air. That one will go to my Father in law at 97 I don't think I want him trying to blow hard enough to run it. LOL Anyway thats the plan right now.

Online crueby

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Re: Huff & Puff
« Reply #12 on: April 04, 2019, 12:10:27 AM »
Cool idea for the gravity 'boiler' on one!


 :popcorn:

Offline gbritnell

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Re: Huff & Puff
« Reply #13 on: April 04, 2019, 11:54:19 AM »
I've seen quite a few oscillators that size but I don't think I've seen a valved engine that small. Nice work so far Doc.
gbritnell
Talent unshared is talent wasted.

Offline jadge

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Re: Huff & Puff
« Reply #14 on: April 04, 2019, 12:05:15 PM »
Looking great, but not what I was expecting! To me huff and puff is a technique for stabilising an LC oscillator to give close to phase locked loop (PLL) performance without the complexity. It was invented by a Dutch amateur radio enthusiast in the 1970s. Of course that was long before digital PLLs became available on a single chip.

Andrew

Offline Doc

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Re: Huff & Puff
« Reply #15 on: April 04, 2019, 10:56:39 PM »
Ok didn't get a whole lot done.
I squared up 2 blocks and drilled the connecting rod hole.
From there I put it in a 4 jaw on the lathe and turned up the little boss.
Then went back to the mill drilled the 2 0-80 screw clearance holes and proceeded to mill the block to what you see now. 
What is left is the crank hole, radius's and general clean up.
Hope to get them done before the weather gets to nice to stay indoors  ;)
Been trying to take pic along with video when I remember.

Offline b.lindsey

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Re: Huff & Puff
« Reply #16 on: April 05, 2019, 01:50:41 AM »
Coming along well Doc. I am fascinated by this one.

Bill

Offline Roger B

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Re: Huff & Puff
« Reply #17 on: April 05, 2019, 05:00:09 PM »
Excellent progress  :ThumbsUp:  :ThumbsUp:  :wine1:

I think I will have ago at one however I will have to convert it to metric  ::) Marv's picture shows a square cylinder is this a different engine or just modified for easier manufacture?
Best regards

Roger

Offline mklotz

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Re: Huff & Puff
« Reply #18 on: April 05, 2019, 05:35:46 PM »
Excellent progress  :ThumbsUp:  :ThumbsUp:  :wine1:

I think I will have ago at one however I will have to convert it to metric  ::) Marv's picture shows a square cylinder is this a different engine or just modified for easier manufacture?

The latter.
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Offline Doc

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Re: Huff & Puff
« Reply #19 on: April 05, 2019, 09:52:44 PM »
Ok finished up the frame or base still needs some hand work though.
Got the flywheels also done.
Then I got distracted and played with my V-8 engines a bit. LOL

Offline b.lindsey

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Re: Huff & Puff
« Reply #20 on: April 05, 2019, 10:37:34 PM »
Nice progress Doc. Looks like the cylinder is facing the wrong way though unless you are modifying the design. Going to have to build one of these when time allows, cute little buggers.

Bill

Offline Doc

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Re: Huff & Puff
« Reply #21 on: April 05, 2019, 10:40:47 PM »
No not modifying just wasn't paying attention LOL
It can be mounted actually either way.

Offline gbritnell

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Re: Huff & Puff
« Reply #22 on: April 06, 2019, 08:59:26 PM »
Hi Doc,
I'm building a "Tiny' version of the Huff and Puff. For the piston/piston rod part I made the piston a screw on piece. The reason being, where the rod connects to the connecting rod it's a round cross section and I wanted to make it square. Doing it this way won't allow the rod to go through the hole in the base so I threaded the end, screwed the piston on then turned the piston to size with it mounted. To assemble it I stick the rod through the base, tighten the piston then mount the cylinder.
You might have a look at modifying that part.
gbritnell
Talent unshared is talent wasted.

Online crueby

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Re: Huff & Puff
« Reply #23 on: April 06, 2019, 09:30:18 PM »
Hi Doc,
I'm building a "Tiny' version of the Huff and Puff. For the piston/piston rod part I made the piston a screw on piece. The reason being, where the rod connects to the connecting rod it's a round cross section and I wanted to make it square. Doing it this way won't allow the rod to go through the hole in the base so I threaded the end, screwed the piston on then turned the piston to size with it mounted. To assemble it I stick the rod through the base, tighten the piston then mount the cylinder.
You might have a look at modifying that part.
gbritnell
The Tiny version is so your shop elves can use it?   :Lol:

Offline Doc

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Re: Huff & Puff
« Reply #24 on: April 07, 2019, 12:01:54 AM »
Well got a little done today between going and getting my pepper seeds and tomato seeds and starting soil. Tomorrow I plan on getting them planted in the starting tray.

  So anyway I did get the crank done
also the slide valve and piston.


Offline b.lindsey

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Re: Huff & Puff
« Reply #25 on: April 07, 2019, 12:38:20 AM »
The dime and dollar show the size well Doc. A small thing it is too. Nice progress.

Bill

Offline Ye-Ole Steam Dude

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Re: Huff & Puff
« Reply #26 on: April 07, 2019, 09:23:19 AM »
Hello Doc,

What Bill stated. And cool :ThumbsUp:

Have a great day,
Thomas

Offline Doc

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Re: Huff & Puff
« Reply #27 on: April 11, 2019, 03:29:43 AM »
Thanks guys did get the last parts done still need to powder coat then start thinking about the air supply unit

<a href="http://www.youtube.com/watch?v=nBE4iftSqto" target="_blank">http://www.youtube.com/watch?v=nBE4iftSqto</a>

Offline Jasonb

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Re: Huff & Puff
« Reply #28 on: April 11, 2019, 07:18:26 AM »
Runs well DOC



Looking great, but not what I was expecting! To me huff and puff is a technique..................................

You never heard of the "Big Bad Wolf" ?  ;)

Offline b.lindsey

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Re: Huff & Puff
« Reply #29 on: April 11, 2019, 02:25:17 PM »
Well done Doc :ThumbsUp: Going to have to make one of these for myself now :)

Bill

Offline Doc

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Re: Huff & Puff
« Reply #30 on: April 12, 2019, 05:21:26 AM »
<a href="http://www.youtube.com/watch?v=F6h1pgOfY0E" target="_blank">http://www.youtube.com/watch?v=F6h1pgOfY0E</a>

Offline Jasonb

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Re: Huff & Puff
« Reply #31 on: April 12, 2019, 07:08:48 AM »
You could use your fuel tank as a vapour one. It should work fine like that, the incoming air makes the fuel bubble and the outlet draws off the air/vapour mix.