"Wes" wrote in message
...
Nick Mueller wrote:

About 4 years ago, I have built this stationary 4 stroke with 87 ccm. It
was
my second IC-engine I've built.
With "todays modern technology" like video and YouTube (Nick, wake up!) I
was able ...


That was nice but http://www.youtube.com/watch?v=3Pa7K287VlU is really
nice.

Wes

How about this one!
http://www.youtube.com/watch?v=mutb7KgA9NM
Greg

"Greg O" wrote in message
. ..
"Wes" wrote in message
...
Nick Mueller wrote:

About 4 years ago, I have built this stationary 4 stroke with 87 ccm. It
was
my second IC-engine I've built.
With "todays modern technology" like video and YouTube (Nick, wake up!) I
was able ...


That was nice but http://www.youtube.com/watch?v=3Pa7K287VlU is really
nice.

Wes

How about this one!
http://www.youtube.com/watch?v=mutb7KgA9NM
Greg

Or this one,
http://www.youtube.com/watch?v=-Ef3GnP9wTI

I wonder what purpose they serve?? ;-)
Greg

"Greg O" wrote:

"Greg O" wrote in message
...
"Wes" wrote in message
...
Nick Mueller wrote:

About 4 years ago, I have built this stationary 4 stroke with 87 ccm. It
was
my second IC-engine I've built.
With "todays modern technology" like video and YouTube (Nick, wake up!) I
was able ...


That was nice but http://www.youtube.com/watch?v=3Pa7K287VlU is really
nice.

Wes

How about this one!
http://www.youtube.com/watch?v=mutb7KgA9NM
Greg

Or this one,
http://www.youtube.com/watch?v=-Ef3GnP9wTI

I wonder what purpose they serve?? ;-)
Greg

My link was to another of Nick's engines, a diesel which is rather
impressive.

As to the purpose, it keeps a guy busy and out of trouble, provides real
world machining problems to solve, and provides a end item that lets one
display their skills. Plus they are really cool to be able to crank up and
run.

I wish I could find a casting kit for a United hit and miss. Uncle has an
original. http://wess.freeshell.org/UncleGene/United/

Wes

Nick Mueller wrote:
Christopher Tidy wrote:


Have you ever thought of building a Wankel engine?


Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

Chris

Christopher Tidy wrote:
Nick Mueller wrote:
Christopher Tidy wrote:


Have you ever thought of building a Wankel engine?


Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

I don't know the answer to your question.

OTOH, I think Nick meant that *he* couldn't
build it without a CNC. Early Wankels could
have been built without CNC and with purpose-
built mills and grinders.

On Fri, 18 Jan 2008 20:51:08 GMT, "Greg O"
wrote:

"William Noble" wrote in message
. ..
could I humbly point out to the group that however useless you think the
other guy's stuff is, the preceeding flame war is even more useless? How
about if you each admire what is good in the other and not worry about the
bad for a while?



No kidding!
As the saying goes, "One man's junk is another man's treasure!"
I have a couple engines in the garage that have pretty much no value, except
to me. I also have a $20,000+ motorcycle that I am sure some don't see any
value in owning. Same as some that own boats, snowmobiles, collector cars,
or shops full of "hobby" tools! How many here have a few thousand dollars
tied up in lathes, mills, shapers, whatever, that will never turn enough
income from them to even pay for the electricity to run them?? Strictly
hobby, just got them to keep some sanity?! I work with a fellow that just
spent $4000 for a turning lathe. His justification? Sick and tired of
driving ONE mile and paying someone else to do the work! Consider in the
last 3-4 years I doubt he has had needed lathe work more the 5 times, at a
total cost of less then $200! Break even runs in the 75 year range! ;-)
We all have our vices, different as they may be!
Greg
Yeahbut it's MINE
Gerry :-)}
London, Canada

Christopher Tidy wrote:

Nick Mueller wrote:
Christopher Tidy wrote:


Have you ever thought of building a Wankel engine?


Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

Chris

I don't think so in 1957. http://en.wikipedia.org/wiki/Wankel_engine

As far as doable, that is more a matter of time and treasure using non cnc
equipment.

Wes

"Christopher Tidy" wrote in message
...
Nick Mueller wrote:
Christopher Tidy wrote:


Have you ever thought of building a Wankel engine?


Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

Chris

No. They used a mechanical generator to generate epitrochoidal shapes. I've
seen the generator mechanism used by NSU to make the first Wankel engines
for cars. Don't try this at home. g

--
Ed Huntress

Ed Huntress wrote:
"Christopher Tidy" wrote in message
...

Nick Mueller wrote:

Christopher Tidy wrote:



Have you ever thought of building a Wankel engine?


Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

Chris


No. They used a mechanical generator to generate epitrochoidal shapes. I've
seen the generator mechanism used by NSU to make the first Wankel engines
for cars. Don't try this at home. g

--
Ed Huntress


I never owned one to take it apart, but the Model Airplane Engine side
of the Japanese company OS Max, made a .30 cu. in. Wankel.

I wonder if they made a scaled down generating apparatus for them.

I had a Mazda RX2, with a 13B rotary transplanted into it. Pass
anything but a gas station. Handled like a pig on stilts, though.

Cheers
Trevor Jones

"Trevor Jones" wrote in message
news:2nfkj.7415$yQ1.898@edtnps89...
Ed Huntress wrote:
"Christopher Tidy" wrote in message
...

Nick Mueller wrote:

Christopher Tidy wrote:



Have you ever thought of building a Wankel engine?


Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

Chris


No. They used a mechanical generator to generate epitrochoidal shapes.
I've seen the generator mechanism used by NSU to make the first Wankel
engines for cars. Don't try this at home. g

--
Ed Huntress
I never owned one to take it apart, but the Model Airplane Engine side of
the Japanese company OS Max, made a .30 cu. in. Wankel.

Yes, I bought one in Osaka in 1981 for my uncle, who used to make model
engines himself. It entertained him for months.


I wonder if they made a scaled down generating apparatus for them.

I don't know how OS made them. I saw the NSU machine at a machine tool show
in Germany, back in the '70s. It was a pretty fancy generating machine. OS
surely had CNC by the time they made the Wankel models, but I don't know if
that's how they cut the chambers.


I had a Mazda RX2, with a 13B rotary transplanted into it. Pass anything
but a gas station. Handled like a pig on stilts, though.

Cheers
Trevor Jones


--
Ed Huntress

Ed Huntress wrote:

No. They used a mechanical generator to generate epitrochoidal shapes.
I've seen the generator mechanism used by NSU to make the first Wankel
engines for cars. Don't try this at home. g

Ah! Thanks! I didn't know that.
But then, a CNC would be cheaper and simpler. G

Nick
--
The lowcost-DRO:
http://www.yadro.de

Wes wrote:

Only doable with CNC. No such thing here.

Did they have CNC when they built the first Wankel engines?

I don't think so in 1957. Â*http://en.wikipedia.org/wiki/Wankel_engine


There does exist an approximation with some circles. But I think I lost the
formula.

Nick
--
The lowcost-DRO:
http://www.yadro.de

Greg O wrote:

How about this one!
http://www.youtube.com/watch?v=mutb7KgA9NM

Seen this one before. Certainly a damned aggressive sound and nice work!
And it also is useful! :-))

Nick
--
The lowcost-DRO:
http://www.yadro.de

"Nick Mueller" wrote in message
...
Ed Huntress wrote:

No. They used a mechanical generator to generate epitrochoidal shapes.
I've seen the generator mechanism used by NSU to make the first Wankel
engines for cars. Don't try this at home. g

Ah! Thanks! I didn't know that.
But then, a CNC would be cheaper and simpler. G

Nick
--
The lowcost-DRO:
http://www.yadro.de

That's how they did production, but I've often wondered how Wankel made his
prototypes. The math isn't very complicated, actually, and I remember
thinking about how you could cut the chamber and piston without a generating
machine or CNC. But I forget what I thought about it. There's another piece
of memory shot to hell.

--
Ed Huntress

On Sat, 19 Jan 2008 09:16:41 -0500, "Ed Huntress"
wrote:



That's how they did production, but I've often wondered how Wankel made his
prototypes. The math isn't very complicated, actually, and I remember
thinking about how you could cut the chamber and piston without a generating
machine or CNC. But I forget what I thought about it. There's another piece
of memory shot to hell.
They say the memory is the second thing to go!
Gerry :-)}
London, Canada