[MOC] Napier Lion Airplane Engine (with variable pitch propeller)

[JoKo]

Hi

You all know I like fake engines with more than just pistons and cylinders. This is my version of the Napier Lion.

The Napier Lion is a british 12-cylinder, 'broad arrow' configuration aircraft engine built by D. Napier & Son from 1917 until the 1930s. A number of advanced features made it the most powerful engine of its day and kept it in production long after other contemporary designs had been superseded. It is particularly well known for its use in a number of racing designs, for aircraft, boats and cars The challenges were to build the three cylinder rows geometry and the triple rods crankshaft. I had to use quite long connecting rods to keeps the cylinder rows far enough from each other.

The engine features double overhead camshafts driven by axles and bevel gears. This kinda hides all the pistons, I should maybe have used transparents cylinders for this one...

Since just camshafts wasn't enough I added a propeller with a variable pitch mechanism using a substractor again (I have a weird soft spot for thoses) The knob low on the right side changes the blades angle between 0° and 90°.

 

[dhc6twinotter]

Neat looking engine!  Subtractors are the way to go when building variable pitch props.  Nice!

[Jurss]

Nice technical build. That propeller add really much to it.

[Paul B Technic]

Very nice build.

[HydroWorld Outlook]

Nice work on this! I really like that propeller design too. 

Edited September 7, 2024 by HydroWorld Outlook
Sorry, I forgot this was an older topic. Milan, please forgive me if I am bumping again. I am so, so sorry.

[JoKo]

 

16 hours ago, HydroWorld Outlook said:

Nice work on this! I really like that propeller design too. 

 I hope it doesn't bother the moderators, but I appreciate nice comments, even about an "old" MOC. Thanks

If you like detailed fake engines I will soon show a new one, with a whole car around. Stay tuned!