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

Office of Steam ~GLOBAL POWER-UP~ virtual engine show => ENGINEERS HALL at Our First Global Power-Up => Topic started by: gbritnell on February 29, 2020, 10:06:11 am

Title: Re: gbritnell's table
Post by: Stoker on March 03, 2020, 09:40:11 am: George, I must say that I have worked extensively around machining operations my whole life. From shipbuilding sized shops that were huge "bays" nearly half a mile long with heavy overhead tracked cranes to move workpieces around, to a custom injection molding house where the moldmaker's were creating hyper-precision tools with the tiniest of details, so I'm well versed in the concepts, practices and skills of the machinist, having known many at the upper levels of the art.

I can say without hesitation, that you are most certainly in that exalted Pantheon of Master Practitioners!

Sadly, though I have deep background, exposure and association, I was always on the engineering related side of the equation, and never apprenticed to the craft. Thus my personal skills at moving metal are mediocre at best, but I certainly know enough to judge what I see.

Thank you for sharing your awesome talent with us here. It is to be hope you will continue to do so on a regular basis, so that we may all see what can be, when heart and mind come together to guide the hands of a Master!!!
Title: Re: gbritnell's table
Post by: gbritnell on March 03, 2020, 07:43:21 am: I would like to thank all who have watched, appreciated and commented on my table. I get great pleasure working with my tools and building the wide variety of models that I have in my collection but more-so I enjoy sharing with others of like mind. At shows when I exhibit I get many comments from all ages and genders but it's the fellows that build and work with these things that really understand the time and effort that goes into them.
In my opinion it's a wonderful hobby and I hope to continue doing it until I can't lift my 8" rotary table onto the mill table any longer. Seems to be getting close. I do have a smaller 6" but it's not quite as nice as the larger one.
gbritnell
Title: Re: gbritnell's table
Post by: gbritnell on March 03, 2020, 07:36:03 am: As the tables are still open I thought I would post these last 3 videos. The original design drawings were posted on another of the model engineering forums and many of them were built. The basic shape was that of a water-cooled type hit and miss engine but without the hit and miss function. Along the line one of the builders created the parts to make his a true hit and miss. I had conversations with him and he sent me some of the extra parts he has made (CNC) I used the flywheel weights but didn't care for the overall design of his lock-out mechanism so I designed my own to more replicate a conventional hit and miss engine.
That is the first video.
I did make some modifications to the design mainly by adding ball bearings to the crankshaft. I also changed the spark plug size and the entry angle as the original plug liked to arc to the valve rocker arm.
The second engine is an extension of the first meaning it uses all the same parts but has an air cooled cylinder.
As an aside, the original engines without governors would run quite fast and therefore would heat up quickly. With the governor set-up the engines will run all day without making much heat at all. This air cooled one barely gets warm to the touch.
The third engine, a vertical, uses some of the basic pieces but with a different base and cylinder arrangement. This also constituted a different fuel tank setup.
The final iteration is a side shaft version of the original. The only original parts were the base, cylinder, flywheels and rod and piston. The head, governor and all other bits and pieces are unique to this engine. For the video I was able to get it to run about it's best. There is a spring on the governor which returns the weight, much like a common governor setup. There is another spring on the speed over-ride lever which will adjust the engine speed while it's running. This spring is minuscule (.008 wire diameter and about .100 long) and is the one element in the whole design that is almost to hard to regulate. I have wound at least 6 different springs with different numbers of coils but with the small size, length constant) it's really hard to get one that totally works.
Enjoy
https://youtu.be/xJ7JRRNpJ6c
https://youtu.be/mbiM_qRLj8M
https://youtu.be/BGt--bS8aao
https://youtu.be/aTVtN9fXcjY
Title: Re: gbritnell's table
Post by: oilfield_steam on March 01, 2020, 08:09:12 am: Quote from: MasonvilleEngines on February 29, 2020, 10:23:30 am
Legendary builds!

Ditto!

Thanks George.
Title: Re: gbritnell's table
Post by: Junkologist on March 01, 2020, 08:02:22 am: Quote from: Nick on February 29, 2020, 11:32:13 am
George, your work is the best and I am lucky enough to have seen it in person :)

Ditto!
Just mind-blowing!
Title: Re: gbritnell's table
Post by: Alan on March 01, 2020, 06:45:34 am: Hy George,
Fantastic work !
Greetings form Switzerland.
Alan
Title: Re: gbritnell's table
Post by: Dr.Rev.DelmarMacReady on February 29, 2020, 03:40:00 pm: I'm just gobsmacked by your work.
Title: Re: gbritnell's table
Post by: Steamloco on February 29, 2020, 02:41:53 pm: Simply amazing!
Title: Re: gbritnell's table
Post by: Nick on February 29, 2020, 11:32:13 am: George, your work is the best and I am lucky enough to have seen it in person :)
Title: Re: gbritnell's table
Post by: Woe is me on February 29, 2020, 10:51:44 am: I have to go with what they all said. You definitely have the WOW factor.
Title: Re: gbritnell's table
Post by: RedRyder on February 29, 2020, 10:45:17 am: Quote from: Stoker on February 29, 2020, 10:21:15 am
The quality and diversity of your CRAFTSMANSHIP, is far beyond the comprehension of us mere mortals!

NOTHING LESS THAN SPECTACULAR!!!

Hi George, I am 100% with Daniel on this.
You have accomplished some of the finest contriving I have ever seen!

Thank you so much for showing here.

Gil
Title: Re: gbritnell's table
Post by: txlabman on February 29, 2020, 10:40:47 am: I never tire of viewing your exquisite work George.

Looking forward to visiting with you at NAMES 2020.

Thank you for participating in GPU 2020! 🤠
Title: Re: gbritnell's table
Post by: AirSpyder on February 29, 2020, 10:37:20 am: Absolute works of art.
Super nice.
Title: Re: gbritnell's table
Post by: MasonvilleEngines on February 29, 2020, 10:23:30 am: Legendary builds!
Title: Re: gbritnell's table
Post by: Stoker on February 29, 2020, 10:21:15 am: The quality and diversity of your CRAFTSMANSHIP, is far beyond the comprehension of us mere mortals!

NOTHING LESS THAN SPECTACULAR!!!
Title: gbritnell's table
Post by: gbritnell on February 29, 2020, 10:06:11 am: These are posted on Youtube but for those of you that haven't seen them may I present some of my mechanical contrivances.
https://youtu.be/fRVYYtdhG_8
https://youtu.be/5QM-SBzFv9c
https://youtu.be/FTtyO_voUU0
https://youtu.be/lfTGrYdp_BI
https://youtu.be/3FKiJnQyzn4
https://youtu.be/x3FOHkT5Z9o
https://youtu.be/694CKZlDyzg
https://youtu.be/V8SDqPE4kZA
https://youtu.be/Sn4t5bsMXyQ
https://youtu.be/bmBgGAN-7aE