Author Topic: Making a Deesil Pattern.  (Read 13346 times)

Offline maury

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Re: Making a Deesil Pattern.
« Reply #15 on: November 30, 2012, 12:52:59 PM »
'396, another question. I ordered a sample kit of Ren Board form Freeman, looking at their site, the number of different grades made it non obvious which one to get. As material goes, it's cheaper than machinable wax, but still a sizable investment for a whole sheet.

Will you use the Ren Board you machined directly as a pattern, or make a rubber mold and use Repro castable urethane? It seems ramming sand around those small fins may cause some breakage. Also, what do you finish the Ren Board with?

Maury
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Offline zeeprogrammer

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Re: Making a Deesil Pattern.
« Reply #16 on: November 30, 2012, 10:00:05 PM »
That was an enjoyable read in that link Steve.
Both interesting and entertaining.
Brought back some memories too.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
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Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #17 on: November 30, 2012, 10:38:42 PM »
'396, another question. I ordered a sample kit of Ren Board form Freeman, looking at their site, the number of different grades made it non obvious which one to get. As material goes, it's cheaper than machinable wax, but still a sizable investment for a whole sheet.

Will you use the Ren Board you machined directly as a pattern, or make a rubber mold and use Repro castable urethane? It seems ramming sand around those small fins may cause some breakage. Also, what do you finish the Ren Board with?

Maury


I'm not sure exactly what type board it is. I get scrap pieces from a friend who uses it alot at work. I could try to find out.

I use it directly as a pattern. I spray it with clear coat to seal it. I don't think there will be a problem with the motor mount ears snapping off. I guess time will tell when we put it to work. If there are problems with it I have a nice piece of maple standing by.
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Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #18 on: December 02, 2012, 12:15:43 AM »
Well I have the pattern completed.You can see on the back side where I screwed it up a little bit. It is
only the runner so I didnt worry about it. The Cases got a little also but that will be machined away.
All that is left is figuring out how to remove it from the sand. I'm not sure what to do. I'll figure out
something. Then 2 coats of clear and done.




The nose pieces are pressed in. I have to ask rick if he wants a radius at the base and if so, what does
he use for a job like that.





These are the rest of the parts. The large piece will form the infeed and the brass pieces will form the boss
on the rear of the case where the fuel system goes.




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Offline DavidF

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Re: Making a Deesil Pattern.
« Reply #19 on: February 05, 2013, 01:52:03 AM »
Any updates??  I would like a look at the castings...

Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #20 on: February 05, 2013, 02:26:03 AM »
It has not been cast yet. The person who will do the casting has had alot going on and has no time to do it. Massive home repairs. I would imagine when the temps here get above freezing he will get the itch. When it happens I will get some pictures posted.
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Online steamer

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Re: Making a Deesil Pattern.
« Reply #21 on: March 17, 2013, 01:02:52 PM »
Hey Steve,

Why not mount that to a match plate?  It will support the pattern and runner and make the whole thing a very strong

All a match plate is , is a piece of heavy plywood.   Pattern and runners on one side.....filler spout on the other.......makes it easier to take from the mold too....

 
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Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #22 on: March 17, 2013, 02:59:32 PM »
Hey Steve,

Why not mount that to a match plate?  It will support the pattern and runner and make the whole thing a very strong

All a match plate is , is a piece of heavy plywood.   Pattern and runners on one side.....filler spout on the other.......makes it easier to take from the mold too....

 


That may very well happen. We were supposed to make some test pours today. We will see if Rick can do it. He has the pattern.
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Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #23 on: March 18, 2013, 12:05:34 AM »
Well the mold was finally used today. Things could have been better. The pattern worked as expected. The shrinkage was exactly what was expected.

The bad part is I machined the thickness of the pattern what the finished casting should be so everything is too thin. I am a moron! Other than that the sand was not bonding very well and there were problems. I am going to make a new pattern and then I have to figure out why the petrobond is a little loose. More to come.



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Online steamer

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Re: Making a Deesil Pattern.
« Reply #24 on: March 18, 2013, 12:29:00 AM »
2 steps forward 1 back....its an old song Steve....You'll get it! 

Don't sweat it bud...

Dave
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Offline swilliams

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Re: Making a Deesil Pattern.
« Reply #25 on: March 18, 2013, 06:34:29 AM »
This is really interesting Steve and nicely done. Hope the slight hiccup doesn't throw you back too far

Steve

Offline ths

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Making a Deesil Pattern.
« Reply #26 on: March 18, 2013, 09:18:35 AM »
That's bad luck, Steve. The curse of Gotham? Any point in making it at 90-95% full size?

Hugh.

Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #27 on: March 19, 2013, 12:51:44 AM »
That's bad luck, Steve. The curse of Gotham? Any point in making it at 90-95% full size?

Hugh.

I guess I could but the whole idea was to make the crankcase and have all the original parts fit. I will make another pattern and it will most likely be a match plate this time.

I also have to fix the sand. It doesn't seem to stick together very well. It is brand new sand so maybe it needs to be used some more. I have no idea. Just seems to flake apart easier than it should.
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Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #28 on: March 24, 2013, 05:09:47 PM »
After reading the story on the deezil it makes me want to build one and see if it runs and for how long. Would make an interesting contest too lol.

Should have enough casting soon. She does have a terrible history.
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Offline stevehuckss396

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Re: Making a Deesil Pattern.
« Reply #29 on: March 24, 2013, 05:10:42 PM »
Well I went out to make a new pattern but I just don't feel well. It will have to wait until I feel better.

Here is some very poor video of the first pattern of the day that went bad. I'll get it!

Do not be like the cat who wanted a fish but was afraid to get his paws wet.