Author Topic: Mills 1.3  (Read 4021 times)

Offline RReid

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Re: Mills 1.3
« Reply #15 on: January 08, 2023, 03:56:44 PM »
Outstanding work! I really like the satin look of the cases contrasted with the shiny fins. :ThumbsUp:
Regards,
Ron

Offline Ghosty

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Re: Mills 1.3
« Reply #16 on: January 09, 2023, 03:58:15 AM »
Hi All,
Started on the crankshaft today, machined the crankshaft bearings from bronze and installed in cases, then reamed to size.
Machined and tapped the nut from 7/16" hex bar.
Centre drilled the crank blank, and then machined the end down for the threaded end as per plans.
Then machined crank down to suite the bearings, then machined taper on shaft.
Machined the prop drive hub, cut slots to drive hub instead of using drive pins as plans.
Cut groves with tool on side, 15thou deep.
Cheers
Andrew

Offline Ghosty

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Re: Mills 1.3
« Reply #17 on: January 09, 2023, 03:59:13 AM »
And a couple more.

Online Kim

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Re: Mills 1.3
« Reply #18 on: January 09, 2023, 05:08:16 AM »
Wow! Your engines are looking fantastic!  And they're really coming along quicly. You work at Chris's speed  :Lol:

You didn't happen to pick up any of Chris's shop elves did you?   :ROFL:

Kim

Offline Ghosty

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Re: Mills 1.3
« Reply #19 on: January 09, 2023, 08:34:58 AM »

You didn't happen to pick up any of Chris's shop elves did you?   :ROFL:

Kim
Kim,
No elves, it has just been basic machining so far, the major time will be when I get to the piston and contra piston, fitting to cylinder.
Cheers
Andrew

Offline Ghosty

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Re: Mills 1.3
« Reply #20 on: January 10, 2023, 04:17:37 AM »
Hi All,
Started on the fuel tank/venturi today.
Machined the tank body from Perspex and alloy.
Machined needle valve from 1214, machined venturi/needle/jet in two pieces. Machined nut(5/16) from 10mm round bar.
Assembled needle/jet/ fuel tank top/venturi with loctite, when set drilled through and then cleaned out jet and needle threads.
Cut fuel tube piece and assembled fuel tank.
Cheers
Andrew

Offline Admiral_dk

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Re: Mills 1.3
« Reply #21 on: January 10, 2023, 11:23:57 AM »
That was a very quick build and the result looks Great  :praise2:

They appear to be ready for first Pop  :cheers:

Do you have Props, fuel and experience running and breaking in CI (Compression Ignition) Engines ?
If not - you should do a bit of reading on Adrians Great page :https://adriansmodelaeroengines.com/
See about Fuel, Break in :https://adriansmodelaeroengines.com/catalog/main.php?cat_id=3

Hope to see a Video of them running  ;)

Per                       :cheers:

Offline Ghosty

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Re: Mills 1.3
« Reply #22 on: January 10, 2023, 07:47:33 PM »
That was a very quick build and the result looks Great  :praise2:

They appear to be ready for first Pop  :cheers:

Do you have Props, fuel and experience running and breaking in CI (Compression Ignition) Engines ?
If not - you should do a bit of reading on Adrians Great page :https://adriansmodelaeroengines.com/
See about Fuel, Break in :https://adriansmodelaeroengines.com/catalog/main.php?cat_id=3

Hope to see a Video of them running  ;)

Per                       :cheers:
No piston, and the crank is not finished yet. So far it is only basic machining, nothing to hard. I hope to get the conrods done today.  I have been involved with model aircraft for over 45 years, yes I have all the stuff. Building these because the originals are very hard to get and I have a couple of aircraft I would like to build.
Cheers
Andrew

Offline Admiral_dk

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Re: Mills 1.3
« Reply #23 on: January 10, 2023, 09:06:58 PM »
Ups - I forgot that I haven't seen you do those  :facepalm:

45 years of experience should defenitely do it - so no reason for me to think about show and tell  :embarassed:

Per

Offline Ghosty

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Re: Mills 1.3
« Reply #24 on: January 11, 2023, 02:50:14 AM »
Hi All,
Started with conrod machining today.
Used a piece of 7075 10mm alloy plate, cut a 10mm slice off and squared up.
Marked out and drilled and reamed big and little ends to size.
Then machined to thickness, then machined centre section to thickness.
With the use of a 1mm(big end) and a 1.5mm(little end) drill bits I machined the outer sides to size.
Then machined the outer big, and little ends.
Still have the final finishing to do.
Cheers
Andrew

Offline Ghosty

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Re: Mills 1.3
« Reply #25 on: January 11, 2023, 02:50:59 AM »
And some more

Offline bent

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Re: Mills 1.3
« Reply #26 on: January 11, 2023, 05:30:26 PM »
Wow, miss a few days and Andrew bangs out a nearly complete engine!

Agree with others, the grit blast finish makes a lovely contrast with the machinined areas.   :ThumbsUp: :popcorn:

Offline Ghosty

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Re: Mills 1.3
« Reply #27 on: January 11, 2023, 07:56:48 PM »
Wow, miss a few days and Andrew bangs out a nearly complete engine!

Agree with others, the grit blast finish makes a lovely contrast with the machinined areas.   :ThumbsUp: :popcorn:
Thanks for the vote of quality of finish.
So far it is only straight up machining, just following the plans, things may slow down when it comes to the piston/contra piston, as the fit have to be exceptional, I have the tooling to check cylinder bore/taper. So I hope every thing goes well, I will just be taking my time.
Cheers
Andrew

Offline vtsteam

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Re: Mills 1.3
« Reply #28 on: January 12, 2023, 02:12:40 AM »
I very much like your method for shaping the connecting rods, and the crankcases look wonderful!  :ThumbsUp: :ThumbsUp: :popcorn: :popcorn:

Why do the connecting rods look gray in the middle. Is that tape?
Steve

Offline jcge

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Re: Mills 1.3
« Reply #29 on: January 12, 2023, 02:59:09 AM »
Andrew - lovely engines and some clever workholding well illustrated !!
Regards
John

 

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