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Piston reversal.

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Re: Piston reversal.

Postby Punto443 » Fri Dec 24, 2021 4:46 pm

andypdq wrote:The basic engine is what it is, how you fuel it is irrelevant when we're talking about gaining mechanical advantage from engine mods. A gain from mechanical modification will bring benefit however you wish to fuel it.


Sounds more like mechanical compromise than advantage, given my layman's pov.
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Re: Piston reversal.

Postby Mike » Fri Dec 24, 2021 5:22 pm

andypdq wrote: stop your gaslighting

:lol: :lol: You've been reading the Daily mail and misunderstood what that term means, brilliant. :lol: :lol:

Anyway, I can't provide technical drawings to prove what I said anymore than you can provide drawings to disprove it.
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Re: Piston reversal.

Postby andypdq » Fri Dec 24, 2021 6:28 pm

Mike wrote:
andypdq wrote: stop your gaslighting

:lol: :lol: You've been reading the Daily mail and misunderstood what that term means, brilliant. :lol: :lol:

Anyway, I can't provide technical drawings to prove what I said anymore than you can provide drawings to disprove it.

I'm not making the assertion, Mike, it's up to those making the assertion to prove the point. I can't prove Russell's teapot, if you know some philosophy.
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Re: Piston reversal.

Postby andypdq » Fri Dec 24, 2021 6:58 pm

A Merry Christmas to all contributing to this thread. You may enjoy a Christmas carol:

https://www.youtube.com/watch?v=DtZR3lJobjw&t=10s
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Re: Piston reversal.

Postby andypdq » Fri Dec 24, 2021 7:07 pm

andypdq wrote:
Mike wrote:
andypdq wrote: stop your gaslighting

:lol: :lol: You've been reading the Daily mail and misunderstood what that term means, brilliant. :lol: :lol:

Anyway, I can't provide technical drawings to prove what I said anymore than you can provide drawings to disprove it.

I'm not making the assertion, Mike, it's up to those making the assertion to prove the point. I can't prove Russell's teapot, if you know some philosophy.


https://en.wikipedia.org/wiki/Russell%27s_teapot

Maybe a few more of these would make my argument more convincing, I'll only do one because I appreciate restraint. :lol:
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Re: Piston reversal.

Postby Mike » Fri Dec 24, 2021 7:33 pm

Keep digging…
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Re: Piston reversal.

Postby andypdq » Fri Dec 24, 2021 9:14 pm

Lol, the strawman argument, there's no strawman, you make claims without providing evidence, it stops there.
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Re: Piston reversal.

Postby Mike » Fri Dec 24, 2021 9:24 pm

andypdq wrote:Lol, the strawman argument, there's no strawman, you make claims without providing evidence, it stops there.

Ok.
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Re: Piston reversal.

Postby andypdq » Fri Dec 24, 2021 10:46 pm

Three cultured ladies at the pianoforte provide some Yuletide suggestions. Merry Christmas everyone:

https://www.youtube.com/watch?v=56R0TCJXfzQ
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Re: Piston reversal.

Postby andypdq » Sun Dec 26, 2021 4:50 pm

Punto443 wrote:
andypdq wrote:The basic engine is what it is, how you fuel it is irrelevant when we're talking about gaining mechanical advantage from engine mods. A gain from mechanical modification will bring benefit however you wish to fuel it.


Sounds more like mechanical compromise than advantage, given my layman's pov.


Resolve the forces, standard configuration means less horizontal component on compression stroke, but more on the power stroke where cylinder pressures are much higher. Reverse the offset and the opposite is true, leading to less side thrust on the piston and frictional losses overall during it's cycle.
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Re: Piston reversal.

Postby V184 » Mon Dec 27, 2021 2:50 pm

andypdq wrote:
Punto443 wrote:
andypdq wrote:The basic engine is what it is, how you fuel it is irrelevant when we're talking about gaining mechanical advantage from engine mods. A gain from mechanical modification will bring benefit however you wish to fuel it.


Sounds more like mechanical compromise than advantage, given my layman's pov.


Resolve the forces, standard configuration means less horizontal component on compression stroke, but more on the power stroke where cylinder pressures are much higher. Reverse the offset and the opposite is true, leading to less side thrust on the piston and frictional losses overall during it's cycle.



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Re: Piston reversal.

Postby Vegard » Mon Dec 27, 2021 7:45 pm

Mike wrote:
Punto443 wrote:
If you are really that bored, try a jigsaw or airfix kit

I’ve got a couple of A series in build (one offset :lol: ) seems like no one else is actually building and engines, despite their posturing. They can talk the talk… :mrgreen:


These will be my fourth, fifth, sixth and eight A-series I’ve built this year….
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Re: Piston reversal.

Postby Mike » Mon Dec 27, 2021 10:31 pm

Vegard wrote:
These will be my fourth, fifth, sixth and eight A-series I’ve built this year….

And?

[whispers]who’s the newbie?[\whispers]
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Re: Piston reversal.

Postby Vegard » Tue Dec 28, 2021 11:11 am

Mike wrote:
Vegard wrote:
These will be my fourth, fifth, sixth and eight A-series I’ve built this year….

And?



I think I'm entitled to say that the A-series is not offset as you claim.
And proof that I actually build these engines and not only talk the talk.
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Re: Piston reversal.

Postby Mike » Tue Dec 28, 2021 12:02 pm

Vegard wrote:
I think I'm entitled to say that the A-series is not offset as you claim.
And proof that I actually build these engines and not only talk the talk.

:wink: I haven’t seen any proof other than 4 A series blocks on a garage floor. But let’s assume that you’re telling the truth. So you, Matt and I have built engines, only the op hasn’t.

As for the offset, I suppose it depends what you build.
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