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  #1 (permalink)  
Old 27 Jul 2003, 07:27 am
Gabriel Afana
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Default square pistons heads?

I was just wondering.....has any company ever considered using square piston
heads? I can't seem to think of any reason why not. They could get more
internal volume with a small engine block size.....

[ ] [ ] [ ] => Utilizes more volume in same space
O O O

The audio company Kicker did this for sub-woofers a few years back and it
was a hit. Instead of putting round speakers next to eachother and waisting
the corner spaces....they made square speakers that could be placed right up
against eachother.....

So...any reason this hasn't/can't be done (has it?)

Gabe


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  #2 (permalink)  
Old 27 Jul 2003, 05:20 pm
Jafir Elkurd
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Default Re: square pistons heads?

I've seen motorcycle engines with oval pistons.

"Gabriel Afana" <adtomi@adelphia.net> wrote in message
news:MyPUa.7357$Ad4.3140839@news3.news.adelphia.ne t...
> I was just wondering.....has any company ever considered using square

piston
> heads? I can't seem to think of any reason why not. They could get more
> internal volume with a small engine block size.....
>
> [ ] [ ] [ ] => Utilizes more volume in same space
> O O O
>
> The audio company Kicker did this for sub-woofers a few years back and it
> was a hit. Instead of putting round speakers next to eachother and

waisting
> the corner spaces....they made square speakers that could be placed right

up
> against eachother.....
>
> So...any reason this hasn't/can't be done (has it?)
>
> Gabe
>
>



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  #3 (permalink)  
Old 27 Jul 2003, 05:49 pm
Jim Yanik
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Posts: n/a
Default Re: square pistons heads?

"Dave" <spencerde@fuse.net> wrote in
news:3f241776$0$4747$a0465688@nnrp.fuse.net:

> There was a show on TV just a few weeks ago where they were
> demonstrating a prototype motorcycle engine with square pistons at the
> end of a lever like assembly. Definitely looked like it had a lot of
> positive features.
>
> Dave
> "Gabriel Afana" <adtomi@adelphia.net> wrote in message
> news:MyPUa.7357$Ad4.3140839@news3.news.adelphia.ne t...
>> I was just wondering.....has any company ever considered using square

> piston
>> heads? I can't seem to think of any reason why not. They could get
>> more internal volume with a small engine block size.....




How do they hone the bores? Or seal the pistons? Can't use rings!
(rings being circular)B-)
Just machining square bores would be difficult and expensive.

Seems like you'd get a lot of blowby.

--
Jim Yanik,NRA member
remove null to contact me
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  #4 (permalink)  
Old 27 Jul 2003, 05:49 pm
Acura God
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Default Re: square pistons heads?

RC51 has oval pistons doesn't it?

David Short
Acura God

"Jafir Elkurd" <jafir@nospam.no.spam.hotpop.com> wrote in message
news:vi8k0uafk695df@corp.supernews.com...
> I've seen motorcycle engines with oval pistons.
>
> "Gabriel Afana" <adtomi@adelphia.net> wrote in message
> news:MyPUa.7357$Ad4.3140839@news3.news.adelphia.ne t...
> > I was just wondering.....has any company ever considered using square

> piston
> > heads? I can't seem to think of any reason why not. They could get

more
> > internal volume with a small engine block size.....
> >
> > [ ] [ ] [ ] => Utilizes more volume in same space
> > O O O
> >
> > The audio company Kicker did this for sub-woofers a few years back and

it
> > was a hit. Instead of putting round speakers next to eachother and

> waisting
> > the corner spaces....they made square speakers that could be placed

right
> up
> > against eachother.....
> >
> > So...any reason this hasn't/can't be done (has it?)
> >
> > Gabe
> >
> >

>
>



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  #5 (permalink)  
Old 27 Jul 2003, 07:38 pm
Dave
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Posts: n/a
Default Re: square pistons heads?

Check out http://www.pivotalengine.com/Brochure.pdf
I think this is the one I saw on TV.

Dave

"Dave" <spencerde@fuse.net> wrote in message
news:3f241776$0$4747$a0465688@nnrp.fuse.net...
> There was a show on TV just a few weeks ago where they were demonstrating

a
> prototype motorcycle engine with square pistons at the end of a lever like
> assembly. Definitely looked like it had a lot of positive features.
>
> Dave
> "Gabriel Afana" <adtomi@adelphia.net> wrote in message
> news:MyPUa.7357$Ad4.3140839@news3.news.adelphia.ne t...
> > I was just wondering.....has any company ever considered using square

> piston
> > heads? I can't seem to think of any reason why not. They could get

more
> > internal volume with a small engine block size.....
> >
> > [ ] [ ] [ ] => Utilizes more volume in same space
> > O O O
> >
> > The audio company Kicker did this for sub-woofers a few years back and

it
> > was a hit. Instead of putting round speakers next to eachother and

> waisting
> > the corner spaces....they made square speakers that could be placed

right
> up
> > against eachother.....
> >
> > So...any reason this hasn't/can't be done (has it?)
> >
> > Gabe
> >
> >

>
>



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  #6 (permalink)  
Old 27 Jul 2003, 08:50 pm
Pahsons - Somnolent
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Posts: n/a
Default Re: square pistons heads?

Falling asleep through Acura God's post...

> RC51 has oval pistons doesn't it?


Even oval has much better potential for complete swirl and burn. I see
those four corners as dead spots

--
"If you can't change a tire, you're not allowed to have a beard. It's the
most basic part of a car: If you don't know that much about a car, you
really shouldn't be driving, should you?" - Jimmy Kimmel

Dan**** (10:38:51 PM): I have more respect for you than ever before
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  #7 (permalink)  
Old 27 Jul 2003, 09:29 pm
ctsbillc
Guest
 
Posts: n/a
Default Re: square pistons heads?

The seals of the Wankel were quite challenging apparently, but this was
achieved.

The future probably does not lie with reciprocating pistons though - time to
move on.

HEV's allow us to potentially use a small turbine which can be quite
efficient working at peak load to drive
an electrical storage medium, probably Ultracapacitors

Still a few years before you trade your Acura in for one though :-)

Bill C.

"Pahsons - Somnolent" <pahsons@juno.com> wrote in message
news:Xns93C5DE3A8C70Bwyrmshutup@130.133.1.4...
> Falling asleep through Acura God's post...
>
> > RC51 has oval pistons doesn't it?

>
> Even oval has much better potential for complete swirl and burn. I see
> those four corners as dead spots
>
> --
> "If you can't change a tire, you're not allowed to have a beard. It's the
> most basic part of a car: If you don't know that much about a car, you
> really shouldn't be driving, should you?" - Jimmy Kimmel
>
> Dan**** (10:38:51 PM): I have more respect for you than ever before



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  #8 (permalink)  
Old 27 Jul 2003, 11:11 pm
Gabriel Afana
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Posts: n/a
Default Re: square pistons heads?


"Gabriel Afana" <adtomi@adelphia.net> wrote in message
news:MyPUa.7357$Ad4.3140839@news3.news.adelphia.ne t...
> I was just wondering.....has any company ever considered using square

piston
> heads? I can't seem to think of any reason why not. They could get more
> internal volume with a small engine block size.....
>
> [ ] [ ] [ ] => Utilizes more volume in same space
> O O O
>
> The audio company Kicker did this for sub-woofers a few years back and it
> was a hit. Instead of putting round speakers next to eachother and

waisting
> the corner spaces....they made square speakers that could be placed right

up
> against eachother.....
>
> So...any reason this hasn't/can't be done (has it?)
>
> Gabe
>
>




Even burn and piston rings are not enough to make this an implausible idea.
If we can make damn space ships that fly to other planets, im sure square
piston rings are not impossible. As for an even burn, that is just in the
experimenting. When the first engines were made, im sure they didn't have
the best designs...but they were a start. Im sure there is some kind of
radical design (designed for square pistons) that could produce a strong
even burn without hot spots. Where there is a will there is a way

Gabe

P.S. NOT falling asleap through my post!!




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  #9 (permalink)  
Old 27 Jul 2003, 11:41 pm
Robert Cooney
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Posts: n/a
Default Re: square pistons heads?


"Jafir Elkurd" <jafir@nospam.no.spam.hotpop.com> wrote in message
news:vi8k0uafk695df@corp.supernews.com...
> I've seen motorcycle engines with oval pistons.


Most pistons are slightly oval-shaped, so they have room to expand when the
engine heats up.

Rob


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  #10 (permalink)  
Old 28 Jul 2003, 11:11 am
Jim Yanik
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Posts: n/a
Default Re: square pistons heads?

"Gabriel Afana" <adtomi@adelphia.net> wrote in
news:Cn1Va.7471$Ad4.3320504@news3.news.adelphia.ne t:

>
> "Gabriel Afana" <adtomi@adelphia.net> wrote in message
> news:MyPUa.7357$Ad4.3140839@news3.news.adelphia.ne t...
>> I was just wondering.....has any company ever considered using square

> piston
>> heads? I can't seem to think of any reason why not. They could get
>> more internal volume with a small engine block size.....
>>
>> [ ] [ ] [ ] => Utilizes more volume in same space
>> O O O
>>
>> The audio company Kicker did this for sub-woofers a few years back
>> and it was a hit. Instead of putting round speakers next to
>> eachother and

> waisting
>> the corner spaces....they made square speakers that could be placed
>> right

> up
>> against eachother.....
>>
>> So...any reason this hasn't/can't be done (has it?)
>>
>> Gabe
>>
>>

>
>
>
> Even burn and piston rings are not enough to make this an implausible
> idea. If we can make damn space ships that fly to other planets, im
> sure square piston rings are not impossible. As for an even burn,
> that is just in the experimenting. When the first engines were made,
> im sure they didn't have the best designs...but they were a start. Im
> sure there is some kind of radical design (designed for square
> pistons) that could produce a strong even burn without hot spots.
> Where there is a will there is a way
>
> Gabe
>
> P.S. NOT falling asleap through my post!!
>
>
>
>
>


BUT,do the advantages outweigh the costs?

--
Jim Yanik,NRA member
remove null to contact me
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