Napier Deltic Engine Model
by zefram, published
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We printed this on an Ultimaker 2, using CURA for slicing and Ultimaker's PLA/PHA. Worked fine - beautiful design!
- we had to take care to reorientate the cylinders and pistons - far better to print them sitting on their ends, otherwise they don't come out very circular.
- we printed the bases with 10% fill to save plastic - seemed fine.
- cogs printed without a brim curled up on the cog teeth a bit - better with a brim. Definitely don't use a raft - it's hard to remove without making a mess.
- cams needed a "support to base", which worked well. Same with cylinders, to make the protrusion work.
- double con-rods needed a support everywhere, and were printed flat. They are pretty rough on the undersides - high friction, and need sanding down.
- the cylinder links were best printed the other way up, so the little lugs weren't printed over space. This made them more accurate and fitted better into the cylinders.
We haven't glued any of it together because it works well without, although you have to be careful not to let the cam pins fall out! Otherwise, all settings were on CURA's defaults for Ultimaker/PLA.
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A STEP file and movie are also available in the downloads.
Â Â Â 1 x Base 1
Â Â Â 1 x Base 2
Â Â Â 1 x Base 3
Â Â Â 5 x Plain Gear
Â Â Â 1 x Cam Gear 1
Â Â Â 1 x Cam Gear 2
Â Â Â 1 x Cam Gear 3
Â Â Â 3 x Cam Gear Pin
Â Â Â 5 x Plain Gear Pin
Â Â Â 3 x Cam
Â Â Â 6 x Piston
Â Â Â 6 x Gudgeon Pin
Â Â Â 3 x Single Con Rod
Â Â Â 3 x Dual Con Rod
Â Â Â 1 x Cylinder 1-2 (I found it best to print cylinders vertically)
Â Â Â 1 x Cylinder 2-3
Â Â Â 1 x Cylinder 1-3
Â Â Â 3 x Cylinder Links
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