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Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 12:36 pm
by JAFO
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Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 12:48 pm
by nallen
T6Harvard wrote:In that vane, a few of my favourite amazing, as in HOW did they think of THAT, inventions are probably first and foremost GEARS, but others include simple things such as the Vernier gauge, and jubilee clips.


And before the gears, think about the wheel plus axle -- something that has no counterpart in nature. (And of course the vital decision as to what colour the wheel should be.)

PS: "In that vein…" (vane being something else that attaches to a wheel). :wink:

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 12:51 pm
by Morten
There was an ad for Lynx which showed how the axle was invented, I believe. It was used for spinning around...

Correction - it was Volvic:

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 1:00 pm
by akg1486
T6Harvard wrote:I like to say I lack the imagination, rather than being thick (although I may well be) :lol:

Every time I open the cowling to check the oil I see the Lycoming boxer engine. At no point have I thought "Hey, why not turn the pistons around so one can get rid of the cylinder heads?". From now on, I don't think I can look at a boxer engine without thinking that. So imagination definitely plays a big part!

(Not that I would have been able to design an engine even with such a flash of insight. :D )

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 1:25 pm
by Iceman
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Iceman 8)

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 1:26 pm
by Iceman
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Iceman 8)

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 1:37 pm
by Dave W
Except that if they use Yodel you'll be unsullied but at least your cat and wheelie bin will be COVID-secure.

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 4:45 pm
by Paul_Sengupta
akg1486 wrote:Every time I open the cowling to check the oil I see the Lycoming boxer engine. At no point have I thought "Hey, why not turn the pistons around so one can get rid of the cylinder heads?". From now on, I don't think I can look at a boxer engine without thinking that. So imagination definitely plays a big part!


The opposed piston engine had been around since 1882 as the Atkinson differential engine.

https://en.wikipedia.org/wiki/Opposed-piston_engine
https://en.wikipedia.org/wiki/Atkinson_cycle#Atkinson_%22Differential_Engine%22
https://en.wikipedia.org/wiki/James_Atkinson_(inventor)

If you started with a four stroke and thought of turning it around, you'd immediately think about how to sort out the valve issue! There was a four stroke version but it wasn't the norm.

There's a modern opposed piston diesel engine for light aircraft, but I haven't heard much about it in recent years. It was one of a handful of aero diesel engines announced all around the same time, some years ago, but hasn't seem to have taken off, so to speak.

https://en.wikipedia.org/wiki/Diesel_Air_Dair_100

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 4:50 pm
by akg1486
My background is in physiccs/electronics (from school) and IT/telecom (from work) and I know next to nothing about engines. Glad to learn, though! :thumleft:

The animation showed well why two-stroke seems to fit best.

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Wed Jan 06, 2021 5:03 pm
by Charles Hunt
We have people here so young they grew up with reliable car engines?

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Thu Jan 07, 2021 10:30 am
by Iceman
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Iceman 8)

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Thu Jan 07, 2021 10:30 am
by Iceman
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Iceman 8)

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Thu Jan 07, 2021 11:16 am
by eltonioni
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Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Thu Jan 07, 2021 12:16 pm
by Boxkite
Wrong thread? Is there a connection there to jokes and comedy about the virus?

Re: Covid19 - Lockdown Entertainment (not serious thread!)

PostPosted:Thu Jan 07, 2021 12:48 pm
by Bill McCarthy
Opposed piston engine - two heavy crankshafts - and you have to gang them together - more weight.