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Old 05-08-2016, 05:23 PM   #1
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Default Making morton m5 engine cylinders

I'm looking for someone to make me some morton m5 engine cylinders from t6 billet aluminum stock.
attached is a print and cad drawings.
need 5 or 7 cylinders.

here are some examples i've found.
http://www.littlelocos.com/littlelocos_web_page_005.htm


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billetm5-1.jpg   billet m5-2.jpg   cylinder billet.jpg   cylinder billet2.jpg   cylinder billet 3.jpg  

morton m5 cylinder.jpg  
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File Type: zip CYLINDER.zip (980.2 KB, 137 views)
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Old 05-17-2016, 02:35 AM   #2
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strange how not one single person has responded or offered to lend me a hand.


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Old 05-17-2016, 08:52 PM   #3
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For a model engine maker to make them for his own use is one thing, to make them for someone else and charge them for the many hours spent making them would not be an option for the end user. The cost would be prohibitive.

Paul.
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Old 05-17-2016, 09:15 PM   #4
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My break even price is about 20 / hour and there will be lots of hours in that job + material + freight.

I can't at present guess at the time required as although I have made plenty of complicated things I have never made anything like that cylinder so for me it would be a make it and see job.

Having had a look at the 3D model there seem to be some bits in the finning around the inlet and exhaust ports that can't be machined as there is no way to get to them. I think if you want the part exactly as modelled then you are looking at lost wax casting.

Where are you?

I believe as Swifty says the cost would be prohibitive.
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Old 05-18-2016, 01:09 AM   #5
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I think nobody replied because of the enormity of the project. As has been stated the time really can't be calculated until the first one is done and this would involve all the fixtures to complete it. The cylinders shown in the link you attached aren't the same as what you show pictures of. On them the rocker posts are screw on pieces. It looks to me like the pictures you posted show that the cylinders were done with a CNC machine. That's not saying that they couldn't be done by hand but here again it's a lot of time.
Let me ask what your intentions are, to build a Morton with them? If so how are you going to machined the other pieces?
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Old 05-18-2016, 11:29 AM   #6
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Many years ago in STRICTLY IC magazine there was a series on building a wax mold for making investment cast M5 cylinders. I think the author was Bruce Satra, but I may have that wrong. I believe after making the mold he did offer castings for sale for a while, but he may have passed on by now. Sorry for my vagueness- I remember the main story but not the details.
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Old 05-18-2016, 11:41 AM   #7
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You're correct Ron. Bruce did have a website where he sold parts for the Morton but sadly he's gone and I haven't heard if it was taken over or not.
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Old 05-18-2016, 05:12 PM   #8
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http://www.rcuniverse.com/forum/gas-...uce-satra.html

Last post on this list was a month ago, they are looking for people interested in building this engine and they have the molds and tooling so MAY be able to help with cylinder castings.

Worth asking them anyway.
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Old 05-18-2016, 06:47 PM   #9
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Quote:
Originally Posted by Richard1 View Post
... they are looking for people interested in building this engine and they have the molds and tooling so MAY be able to help with cylinder castings..
You found the link I was thinking of but couldn't recall where. I would think procuring castings would be significantly less expensive over what is probably a multi-axis CNC job + related fixtures for bar stock equivalent.

Not sure if this is relevant ballpark $$, but these two vendors supply limited pre-made parts relating to their own plans/designs. Your Morton example is even more specialized & complex because its integrated cylinder + head + rocker perch + other features all rolled up into one part vs. separately assembled components.

http://www.engineman.de/?wpsc_product_category=9-zylinder-sternmotor&lang=en
http://www.cad-jung-shop.de/epages/62479729.sf/en_GB/?ObjectPath=/Shops/62479729/Categories/%22Bauteile%20f%C3%BCr%20Modellmotore%22
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Old 05-18-2016, 07:37 PM   #10
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Nice work at cylinders from bar stock of aluminium, but not cheap in electric consumption for home machinist, price of material before create to a product, an a lot hours of working.

There are two thing to think if the engine is used in the model airplane:
1. Cylinder made of aluminium bar stock is more strong against crash.
2. Cast cylinder of aluminium is brittle and knock off if crashed.

To be honest, i never seen the model airplane with Morton M5.


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