Author Topic: Pattern making for a model IC engine  (Read 5294 times)

Offline Bezalel

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Pattern making for a model IC engine
« on: November 04, 2012, 10:57:16 AM »




Since patterns are the common starting point of most sand castings, I thought it may be beneficial to provide a link to a build log that describes the methods I used for making the patterns to cast my


Model Engine for LMS 1831 (AKA Wallaby)


A 2 Cylinder 30cc petrol IC engine designed by Edgar Westbury in the 1940s


I hope you enjoy





Queensland - wet one day, humid the next

Offline Don1966

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Re: Pattern making for a model IC engine
« Reply #1 on: November 14, 2012, 03:56:06 AM »
Those are nice patterns Bez. One thing I need practice at. I do want to start one day, but I have myself spread thin now. Once I decid to retire I my have more time. Right now time is limited.

Don

Offline Bezalel

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Re: Pattern making for a model IC engine
« Reply #2 on: November 14, 2012, 07:13:35 AM »
Thanks Don
 
I had a lot of fun making them.
 
Its a real buzz seeing a little working donk reving away from castings made in the back yard, thats for sure.    :cheers:
 
Bez 
Queensland - wet one day, humid the next

Online Jo

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Re: Pattern making for a model IC engine
« Reply #3 on: November 14, 2012, 07:32:14 AM »
Very nice set of patterns :ThumbsUp:. I see that they have been nicely rounded, smoothed and varnished (?), very necessary to stop the sand sticking. In my experience (I have only cast once :embarassed:) a well finished pattern helps discourage flashing on the casting.

Jo
Usus est optimum magister

Offline steamer

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Re: Pattern making for a model IC engine
« Reply #4 on: November 14, 2012, 10:15:51 AM »
I got the chair and the popcorn!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

fcheslop

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Re: Pattern making for a model IC engine
« Reply #5 on: November 14, 2012, 10:55:36 PM »
Thanks for posting this .Chair pulled and ready to start learning :ThumbsUp:
Many thanks
frazer

Offline Pete49

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Re: Pattern making for a model IC engine
« Reply #6 on: November 15, 2012, 02:42:45 AM »
Don when you retire you will have even less time than you have now :lolb: Ask anyone who has retired how big the list becomes
Pete
I used to have a friend.....but the rope broke and he ran away :(

Offline Don1966

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Re: Pattern making for a model IC engine
« Reply #7 on: November 15, 2012, 04:25:01 AM »
Yea Pete, my buddy Jim has been retired for years and has less time now then before. So I get what you mean.

Don

Offline Meldonmech

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Re: Pattern making for a model IC engine
« Reply #8 on: November 18, 2012, 09:47:09 AM »
Hi Bez,
           Nice to see projects where constructors are using their own castings, I have found it much more rewarding. Have just made the patterns for a beam engine and am waiting for a nice sunny day to do some casting.

              Cheers David

Offline Bezalel

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Re: Pattern making for a model IC engine
« Reply #9 on: November 18, 2012, 11:09:04 AM »
Well  :hi: to the forum David.


I'd like to see your beam engine,  are you going to publish a build log?


Bez
Queensland - wet one day, humid the next