Author Topic: Brayton Readymotor.  (Read 8544 times)

Offline Jasonb

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Re: Brayton Readymotor.
« Reply #30 on: August 01, 2020, 01:16:29 PM »
Very nice Jason, but I have to say on seeing it my first thought was of a beautiful mermaid! :NotWorthy:
John

I think you have been in lockdown for two long, next thing you will be telling us you have seen a unicorn ;) But it certainly make it easy to produce curvy shapes that would be difficult and time consuming on manual machines. The limit now is really what can be drawn, I would have liked a bit more "flair" where the spoke joins the hub but my cad had other ideas though a bit of body filler on the pattern should make up for any shortcomings.

At least I can cut at whatever speed I fancy here :LittleDevil:

Offline kvom

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Re: Brayton Readymotor.
« Reply #31 on: August 01, 2020, 05:12:09 PM »
Don't you have to machine a mirror image piece for the reverse side?

Offline Jasonb

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Re: Brayton Readymotor.
« Reply #32 on: August 01, 2020, 05:26:09 PM »
Yes, 6 of each type needed due to curve of spokes as mentioned in post #8

Offline Alyn Foundry

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Re: Brayton Readymotor.
« Reply #33 on: August 01, 2020, 07:14:04 PM »
Jason.

I was really impressed watching the video and by the finish,  beautiful to look at but I'm a little daunted by the rim.

Let's hold on for the moment whilst I wait for some quotes to come back.

Cheers Graham.

Offline Jasonb

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Re: Brayton Readymotor.
« Reply #34 on: August 01, 2020, 07:20:51 PM »
I could do the rim

Offline Alyn Foundry

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Re: Brayton Readymotor.
« Reply #35 on: May 14, 2022, 12:45:02 PM »
Progress….

With some amazing work and help from Jason Ballamy, many thanks.

The greatest challenge was the weight of the base casting @ nearly 30 Kgs then the height of 18”….

Offline Jasonb

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Re: Brayton Readymotor.
« Reply #36 on: May 14, 2022, 01:26:41 PM »
Happy to have helped.

You will soon have a bit of a dilemma what with castings for three different engines all vying for your attention, At least you won't have to fight off any elephants to get to them

Any more thoughts on the crosshead?

Offline Alyn Foundry

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Re: Brayton Readymotor.
« Reply #37 on: May 14, 2022, 02:17:09 PM »
Indeed Jason.   ;)

We managed to marry the machined beam yoke to the main bed yesterday evening and just in time…. The Knight can now have its 6” capacity machine vice back. We have an engine to complete before June….

Showing some of the cleaning up process, and remarkably good finish considering the machine was pushed to its limits.

For those that might be interested to know in greater detail what’s been going on lately, please feel free to join in at….

https://www.facebook.com/groups/ALYNFOUNDRYMODELS/

 :cheers: Graham.

Offline Roger B

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Re: Brayton Readymotor.
« Reply #38 on: May 14, 2022, 05:09:37 PM »
That looks quite a beast  :)  :)  :) Excellent team work  :ThumbsUp:  :ThumbsUp:  :wine1:
Best regards

Roger

Offline Jo

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Re: Brayton Readymotor.
« Reply #39 on: May 14, 2022, 05:41:36 PM »
For those that might be interested to know in greater detail what’s been going on lately, please feel free to join in at….

https://www.facebook.com/groups/ALYNFOUNDRYMODELS/


Sadly that is a private group on farcebook which is only visible to members. Many forum members here are not members of Farcebook.

Personally I will not join as I understand the implications of the types cookies employed by Farcebook and I make sure to clear down all cookies every time I go anywhere near it  :paranoia:

Jo
Enjoyment is more important than achievement.

Offline Jasonb

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Re: Brayton Readymotor.
« Reply #40 on: May 14, 2022, 06:43:40 PM »
Though it does seem to be the way the online hobby is going with some forums seeing less activity while the more focused FB groups and similar get plenty of traffic from likeminded users.

There is no doubt a lot of rubbish on there but the closed groups can keep a lot of that out and are easy enough to join for those that want to see what they may be missing out on. I'm only a member of a few but they do cover what I'm interested in or are run by people whose workshop activity I enjoy following such as the likes of Wayne Grennings.

From postings yesterday and today we may have found another subject to model :cartwheel:

Offline Admiral_dk

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Re: Brayton Readymotor.
« Reply #41 on: May 14, 2022, 09:22:25 PM »
Looks fantastic - but it's huge  :o

Per

Offline Alyn Foundry

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Re: Brayton Readymotor.
« Reply #42 on: May 18, 2023, 12:00:29 PM »
I’m now on a bit of a mission….

We are going to have the UK’s first dedicated small power engine rally to be held at the Anson engine museum this coming July. I thought that the Brayton Ready-Motor might be a nice exhibit. Having already chosen a size of 3/4” diameter for the crankshaft can anyone recommend a supplier of true to size round bar please? Silver Steel is way too expensive at this time.

Photo of Brass bearing shells and crankshaft webs.

 :cheers:  Graham.

Offline Jasonb

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Re: Brayton Readymotor.
« Reply #43 on: May 18, 2023, 12:19:59 PM »
Precision ground mild steel is about 1/3rd cheaper for 3/4" or half the cost if you go to 20mm

 https://www.m-machine-metals.co.uk/downloads/Metals%20catalogue.pdf

Offline Alyn Foundry

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Re: Brayton Readymotor.
« Reply #44 on: May 18, 2023, 01:30:37 PM »
Precision ground mild steel is about 1/3rd cheaper for 3/4" or half the cost if you go to 20mm

 https://www.m-machine-metals.co.uk/downloads/Metals%20catalogue.pdf

Thanks Jason.

Having spent a fortune on an extra long 3/4” machine reamer for the mains I shall have to stick with the Imperial diameter. Just spoken with a lovely lady at the firm and managed to source some 3/8” Steel tube for the air and fuel lines, absolute bonus….

 :cheers:  Graham.

 

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