Author Topic: 1/2 Size KyKo Hot Air Engines  (Read 40333 times)

Online crueby

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #165 on: October 25, 2025, 11:25:09 PM »
Fantastic!

Offline pirmin

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #166 on: October 25, 2025, 11:58:29 PM »
Wow, incredible work dave.  your UPt looks fantastic by the way ""

Offline RReid

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #167 on: October 26, 2025, 12:49:14 AM »
Everything you make is always so beautifully finished, Dave! Lovely to look at and an inspiration.
Regards,
Ron

Offline uuu

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #168 on: October 26, 2025, 07:38:57 AM »
It's not just the work that is lovely.  All your machinery seems to be polished!

Wilf

Online Sanjay F

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #169 on: October 26, 2025, 05:13:25 PM »
I don't really know what to say ...... the way it was designed, to the machining and the final finish are astonishing. I can't find suitable superlatives, but here's one .......AWESOME!  :ThumbsUp: :ThumbsUp:
Best regards

Sanjay

Offline Dave Otto

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #170 on: October 26, 2025, 10:44:13 PM »
Thanks Everyone for all the wonderful comments, as always they are much appreciated!

Dave

Offline SteamR

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #171 on: October 27, 2025, 11:42:18 AM »
Very nice model and great workmanship, Dave.

Offline Dave Otto

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #172 on: November 01, 2025, 04:20:16 PM »
Thanks SteamR

Dave

Offline Dave Otto

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #173 on: November 01, 2025, 04:45:04 PM »
Hi Guys

The next small item to check off the list is the carrying handle. This is a twisted wire affair with a simple wood handle.


I purchased some galvanized .047” wire from McMaster Carr which is half size of the original. Not only did it have a pretty good curve from being on a coil it was lumpy too.


I was able to grab it in two Jacobs chuck and give it a good stretch which straightened it out pretty well.


The lathe was turned by hand and the tail stock left unclamped to add the proper number of twists. I did a test part to determine the proper length of the wire initially.


The little wood handle was turned from some African Black Wood that I had left over from oiler knobs on the Pacific engine. The original was painted black but this is dark enough I will just leave it as is.


The handle was slid into place and the legs bent, also the start of the mounting loops formed. I used some gun blue on the wire and gave it a light polish with some Scotch-Brite to get rid of the new look.


I made a dummy of the engine top plate to help form the loops in the wire ends. This kept me from scratching up the top of the engine. Also, it is much easier to clamp things in place using some small parallel machinist clamps.


Here it is mounted on the engine, on my original fan the handle was mounted using round head screws as I have done here. They will eventually be nickel plated along with all the other hardware.


It is a little bow legged as is the original, this is to clear the displacer connecting rod as it swings around.

All for now, thanks for checking in and more to follow.
Dave

Online Kim

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #174 on: November 01, 2025, 05:04:01 PM »
The handle looks very nice, Dave.   :popcorn: :popcorn:

I understand the reason for the bowing out, but wouldn't that deform inward over time, as you carry the fan around by the handle?  Guess you can bend it back out again if it starts getting hit by things!  :Lol:

Kim

Offline Dave Otto

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #175 on: November 01, 2025, 05:13:52 PM »
Thanks Kim!
The answer is the handle is much stronger than the weight of the fan. Even on the big fan which is quite heavy the handle does not deform at all when the fan is lifted. My little fan is surprisingly very light.

Dave

Offline Michael S.

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #176 on: November 01, 2025, 06:07:20 PM »
Hi Dave, the Stirling engine looks very elegant!   :ThumbsUp:

Michael

Offline Dave Otto

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #177 on: November 01, 2025, 11:02:40 PM »
Thanks Michael!

Dave

Offline Roger B

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Re: 1/2 Size KyKo Hot Air Engines
« Reply #178 on: November 07, 2025, 10:54:08 AM »
Excellent  :praise2:  :praise2: I do like the handle  :)  :wine1:
Best regards

Roger

 

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