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Old 23-10-2012, 13:58   #16
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Re: Article On New Diesel Technology

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Fairbanks Morse 10 cylinder opposed piston engines were used in Submarines and other applications.
The idea was also used in a variety of Napier engines such as the Deltic and in a series of engines pioneered by Hugo Junkers in 1928. Of course the new explorations with new technologies into old ideas can be very worthwhile.
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Old 24-10-2012, 13:13   #17
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Re: Article On New Diesel Technology

The Napier Deltic was a fascinating engine, particularly the ones that were put into fast torpedo boats.

Another interesting diesel was the German Junkers 205, which was used in aircraft...yep... in the 1930s.

A limited number of aircraft diesels are used today in small passenger aircraft:

Thielert Centurion - Wikipedia, the free encyclopedia

Even though I'm currently installing a typical (if cleaner and leaner) marine diesel, I always welcome learning about new technologies in this line.
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Old 24-10-2012, 13:50   #18
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Re: Article On New Diesel Technology

Like all new unproven "new" technologies that someone is hollering is the best thing since sliced bread, it's better to let others be the guinea pigs.
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Old 24-10-2012, 13:57   #19
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Re: Article On New Diesel Technology

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Originally Posted by S/V Alchemy View Post
The Napier Deltic was a fascinating engine, particularly the ones that were put into fast torpedo boats.
When I was a Sea Scout leader we got a fast boat (PTF-26) with two Napier Deltics donated to our program. My brother and I rode aboard it while we had it towed up the coast from Port Hueneme to the SF Bay. After we started digging around, we found one engine was broken with no chance of getting it fixed and the other engine we got working a few times before it self-destructed. Boy was it fun getting that engine up an running. I think it was something like 3000 horsepower. It had this huge turbine that spun up making it sound like a jet engine. It was so loud you had to wear foam ear plugs and Mickey Mouse ear muffs. It's a shame we never got the boat up to its full speed...but what fun it was while it lasted. We ended up replacing the the Napiers with four Detroits, which made a hell of a lot more sense for a Sea Scout unit. I am not involved with the boat anymore. It is being ran by a different Sea Scout unit out of Sacramento.



http://www.hnsa.org/ships/img/ptf26-1.jpg
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Old 24-10-2012, 14:05   #20
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Re: Article On New Diesel Technology

I like this. I hope it will work and develop into better, lighter engines for us!

b.
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Old 24-10-2012, 14:47   #21
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Re: Article On New Diesel Technology

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When I was a Sea Scout leader we got a fast boat (PTF-26) with two Napier Deltics donated to our program. My brother and I rode aboard it while we had it towed up the coast from Port Hueneme to the SF Bay. After we started digging around, we found one engine was broken with no chance of getting it fixed and the other engine we got working a few times before it self-destructed. Boy was it fun getting that engine up an running. I think it was something like 3000 horsepower. It had this huge turbine that spun up making it sound like a jet engine. It was so loud you had to wear foam ear plugs and Mickey Mouse ear muffs. It's a shame we never got the boat up to its full speed...but what fun it was while it lasted. We ended up replacing the the Napiers with four Detroits, which made a hell of a lot more sense for a Sea Scout unit. I am not involved with the boat anymore. It is being ran by a different Sea Scout unit out of Sacramento.



http://www.hnsa.org/ships/img/ptf26-1.jpg
Fun, indeed! Sounds like you had the Napier Deltic turbo variant, which was used on US Navy boats based on Norwegian designs, of all things.

There's a page on your old boat here.
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Old 24-10-2012, 15:17   #22
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Re: Article On New Diesel Technology

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The reasons that the Wankel has not done well in the automotive sector are mostly related to the particular demands of the automotive sector, specifically the need to develop high power in the low RPM range, without that an engine will not perform adequately in normal stop and go traffic around town.

There have also been advances in fuel economy such that the wankel is now comparable to Gas and diesel automotive engines.

For boat use the engine generally run continuously at medium to high power putting the engine in a regime it can work well in.

The Wankel also has a big advantage on reciprocating engines in the areas of reliability, weight and physical size.

From reading about different engine cycles, it appears the liquidpiston has adopted aspects of the Adkinson cycle to increase efficiency.

Technology marches on and it appears that the wankel may come around again.
If you've ever driven a Wankel Mazda... they aren't lacking out of the hole! Maybe it's a HP/to weight thing... but they come out Fast!
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Old 24-10-2012, 15:37   #23
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Re: Article On New Diesel Technology

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If you've ever driven a Wankel Mazda... they aren't lacking out of the hole! Maybe it's a HP/to weight thing... but they come out Fast!
Did you have a later version high perf 3 rotor engine? Our family had a 1972 2 rotor Mazda. Punch the gas pedal and you ever so slowly accelerated until you hit around 4000 rpm, then it took off. Reminded me alot of my friends Kawasaki 2 stroke motorcycle, it had no omph until 5000 rpm then all the sudden it felt like you were going to be left behind the bike.

John
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Old 24-10-2012, 15:38   #24
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Re: Article On New Diesel Technology

in sports car racing, a nice mazda wankel would leave the rest of its class in the dust. the pro mazda series that was initiated in 1984 at long beach grand prix was originally the baby of a friend of mine--that was the day of the rotary engine--there was pro mazda series that jim russell school took over, and there were group 3 race cars with rotary engines--all doing well. very fast. reliable--we didnt have to rebuild any engines first year--kind unheard of--there was one pro mazda engine we had didnt have rebuild or freshening for 4 yrs--ran great and won race most of that season.
those of you with racing cars know that doesnt happen.
so, who nixed the deal with rotary engines--it was not because of poor performance. wasnt usa still kinda making cars that could not compete withthat technology?? isnt that the real reason they disappeared????

if technology were truly to make a wankel diesel--i would volunteer for being a guinea pig as long as the installation and maintenance schedule was covered by the installing ompany ...and if it went south, repower at their expense, wherever i might be ...
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Old 24-10-2012, 16:06   #25
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Re: Article On New Diesel Technology

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Originally Posted by cal40john View Post
Did you have a later version high perf 3 rotor engine? Our family had a 1972 2 rotor Mazda. Punch the gas pedal and you ever so slowly accelerated until you hit around 4000 rpm, then it took off. Reminded me alot of my friends Kawasaki 2 stroke motorcycle, it had no omph until 5000 rpm then all the sudden it felt like you were going to be left behind the bike.

John
My buddy had an RX7 sports car for years. then another friend had the last model they made... RX9? Geez those things were fast and smooooth. Totally differnt feel than a piston engine... more like an electric hybrid... pretty sure most were 3 rotor. Yeah, the original rx2 or whatever it was was reputed to be a loser.
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Old 24-10-2012, 16:41   #26
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Re: Article On New Diesel Technology

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so, who nixed the deal with rotary engines--it was not because of poor performance. wasnt usa still kinda making cars that could not compete withthat technology?? isnt that the real reason they disappeared????

They were dirtier and less efficient.
From: Wankel engine - Wikipedia, the free encyclopedia

Comparison tests have shown that the Mazda rotary powered RX-8 uses more fuel than a heavier vehicle powered by larger displacement V-8 engine for similar performance results.
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Old 24-10-2012, 16:41   #27
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Re: Article On New Diesel Technology

maza rotary engine series 12a was slow. 12b was ok-went fast with reliability.... i dont know about the newer ones....13 was the newer one...

rx8 was a heavy car--not light as the rx7. unfair comparison to rate a hard laboring engine against one not working as hard. place the engine from the rx 8 into a lighter car then see how bad it is. i bet you have better numbers. there was a performance issue with 13 that i do not remember....wasnt that it was dirty or overworked, was a nice, oblique reason.
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Old 24-10-2012, 18:55   #28
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Re: Article On New Diesel Technology

so, who nixed the deal with rotary engines--it was not because of poor performance. wasnt usa still kinda making cars that could not compete withthat technology?? isnt that the real reason they disappeared????

I think they were not that fuel efficient, also heard that the Wipers (equivalent of rings ) wore out faster than a conventional engine.... although supposedly easier to replace.
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Old 24-10-2012, 21:40   #29
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Quote:
Originally Posted by bstreep
I won't buy one for JUST this reason alone "...with 10 times fewer parts...". How, is that possible? 1 times fewer parts is 0 total parts. So, does it have negative parts?

This assertion that products are "X times less..." is just stupid - and impossible.
Ten times fewer parts than a current production truck engine would be very possible. If the 50% numbers are correct. The emissions parts on a new vehicle is amazing high
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Old 24-10-2012, 21:42   #30
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The navy is sitting on an engine from the 70's that uses no fuel. Documentary on you tube convinced me.





Nitinol - A New Free Energy System
by kinglake1

Additional information

Prize winning 1982 CNN report by science editor Kevin Sanders:
His follow-up articles on Nitinol in Science Digest are here:
http://www.colorsproject.com/nitinol...82_sanders.pdf
Recovered last page
http://opinion.coffeecup.com/recover...page%20001.jpg
Sanders bio:
http://www.warpeace.org/staticpages/index.php/sanders
German
https://www.dropbox.com/s/bul77jht6u...ranslation.pdf

Japan Times
https://www.dropbox.com/s/3bpwl8c4pc...e%20Award.docx

UPDATE REPORTS & ARTICLES:

Review of sensational new book on Nitinol-Roswell links:
http://www.ufodigest.com/article/ros...ufo-crash-1947
Norway 2012 study intrigued - Report on nitinol by J. S. Olsen
http://www.sciencedirect.com/science...20768312001436

(not to be confused with G.B Olsen, author of the extraordinary report on
the martensitic effect in "Martensite and Life"
http://jphyscol.journaldephysique.org/index.php?
option=com_article&access=doi&doi=10.1051/jphyscol:19824140&Itemid=129&lang=en

US Navy Report Nitinol Heat Engines - 1980
http://www.dtic.mil/dtic/tr/fulltext/u2/a084950.pdf

New Nitinol Heat Engine Design (PDF report)
http://scholar.lib.vt.edu/theses/ava...ricted/ETD.pdf

Nitinol Heat engine blogs/discussions
http://www.overunityresearch.com/index.php?
topic=1400.msg22321;topicseen

Update article on Nitinol Engines by Ridgeway Banks:
http://www.winstonbrill.com/bril001/...le12_body.html

Unavailable US Navel patent on Nitinol production
http://www.stormingmedia.us/05/0517/D051700.html

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