Strange twin row 8 cylinder radial engine

[MiloMorai]

 

Was this used in an actual engine?

[6./ZG26_Klaus_Mann]

It most likely isn't practical, as it requires extremely tight Tolerances and lots of Moving Mass. I doubt something like that would run for very long. 

Edited January 26, 2019 by 6./ZG26_Klaus_Mann

[ZachariasX]

21 minutes ago, MiloMorai said:

Was this used in an actual engine?

Somebody had a good time with LEGO parts...

[AndyJWest]

An engine of this configuration was  certainly built and tested. It isn't entirely clear whether the Marchetti Cam Engine was ever flown. 

https://oldmachinepress.com/2014/09/28/marchetti-cam-action-engines/

 

[DD_Arthur]

56 minutes ago, 6./ZG26_Klaus_Mann said:

It most likely isn't practical, as it requires extremely tight Tolerances and lots of Moving Mass. I doubt something like that would run for very long. 

 

Isn't that a description of the Napier-Sabre engine? 

[II/JG17_HerrMurf]

 Not an engine guy by any stretch but doesn’t this firing order essentially make it a very exotic four cylinder? Also, I thought there was an engineering reason for odd numbers of cylinders on a given row for radial engines.

 

(Cleaned up my double post)

Edited January 27, 2019 by II/JG17_HerrMurf
Clarity

[6./ZG26_Klaus_Mann]

 

 

 

The Italians always did that Cam-Stuff. This is a Springless Valvetrain, with Cams operating opening and Closing of Valves. 

[DD_Arthur]

Oh dear Klaus.  You've just reminded me of the 1978 Ducati Darmah I once owned. 

 

It was my pride and joy for approx. 2 months until a circlip in the gearbox broke.  The rebuild - which involved splitting the crankcases - cost more than what I'd payed for the bloody thing in the first place.

 

 

[Ehret]

1 hour ago, II/JG17_HerrMurf said:

 Or an engine guy by any stretch but doesn’t this firing order essentially make it a very exotic four cylinder? Also, I thought there was an engineering reason for odd numbers of cylinders on a given row for radial engines.

 

That's not a radial engine... more like a very fancy boxer, imho.

[Bremspropeller]

First we had the boxer engine, now we have a brawl engine.

 

I wonder what's next.