[Gasification] Fwd: Gasification Digest, Vol 2, Issue 25
kenn johnsen
kennj at webspeed.dk
Thu Aug 17 16:00:39 CDT 2006
> Kevin
>
> Ship engine got something like it, according to MAN - BMW the inline
> motion does that it only wear the cylinder wall about 1 mm per 1000
> hour, otherwise all I know is what Bourke says - claims.
http://people.bath.ac.uk/ccsshb/12cyl/
>
> Kenn
> torsdag 17. aug 2006 kl. 21:53 skrev Kevin Chisholm:
>
>> Dear Kenn
>> ----- Original Message ----- From: "kenn johnsen" <kennj at webspeed.dk>
>> To: <gasification at listserv.repp.org>
>> Sent: Thursday, August 17, 2006 4:14 PM
>> Subject: Re: [Gasification] Fwd: Gasification Digest, Vol 2, Issue 25
>>
>>
>>> Kevin
>>>
>>> Well, it most have something to do with the scotch yoke, a later
>>> timing
>>> so the engine do not work against itself, a longer combustion time, a
>>> better combustion. That is also what they clearly say,
>>
>> There would be slightly different piston motion with teh Scotch Yoke,
>> but nothing really significant. Indeed, if it gave significantly
>> longer effective time around TDC, the engine would probably require a
>> change in spark timing to prevent excessive pressure build-up and
>> possible knocking.
>>
>> it is building
>>> up an incredible heat in the combustion process, something like 1000
>>> C,
>>
>> I don't think that is very much different from a conventional Otto
>> Cycle. If anything, it is lower.
>>
>>> it can do a heck of rpm because of the in line motion, what also
>>> means
>>> a little wear on the cylinder wall.
>>
>> The inline motion would make it a real pig to balance. Horizontal
>> imbalance could be counteracted by a crank weight, but vertical
>> vibration because of the counterweight would tend to cause the engine
>> to jump up and down. If teh engine was bolted down so that tehre was
>> minimal vertical movement, the imbalanced forces would show up as
>> bearing stress.
>>
>> Perhaps I am missing something but I can't see anything in the Burke
>> Engine of significant advantage.
>>
>> Best wishes,
>>
>> Kevin
>>>
>>> Kenn
>>> torsdag 17. aug 2006 kl. 17:36 skrev Kevin Chisholm:
>>>
>>>> Dear Kenn
>>>>
>>>> Can you, or anyone, see anything specific about this engine that
>>>> would
>>>> suggest that there is a rational basis for improved fuel efficiency?
>>>>
>>>> If not, then this would have to be classed as an "unsubstantiated
>>>> claim, with no reason to believe it is true."
>>>>
>>>> Best wishes,
>>>>
>>>> Kevin
>>>>
>>>> ----- Original Message ----- From: "kenn johnsen"
>>>> <kennj at webspeed.dk>
>>>> To: <gasification at listserv.repp.org>
>>>> Sent: Thursday, August 17, 2006 11:19 AM
>>>> Subject: [Gasification] Fwd: Gasification Digest, Vol 2, Issue 25
>>>>
>>>>
>>>>> It is claimed to use 1/4 of a pound off fuel, per horse, and
>>>>> that
>>>>> is
>>>>> with a carburetor, what would happen if the Aussie Orbitel got
>>>>> there
>>>>> hands on it.
>>>>>
>>>>> Kenn
>>>>>>
>>>>>> Hi Drew,
>>>>>>
>>>>>> I mentioned the Bourke because I personally DON'T KNOW. Except
>>>>>> that
>>>>>> Bourke
>>>>>> produced and sold 30cc models of it in the 1950s and others now
>>>>>> make
>>>>>> certain
>>>>>> performance claims for it. Plus one of the websites shows a 30cc
>>>>>> Bourke now
>>>>>> being tested periodically against a 24 KW generator. A 24kw
>>>>>> generator
>>>>>> would normally need 48 shp so that picqued my interest. Whether
>>>>>> he's
>>>>>> able
>>>>>> to run it full load with his Bourke engine, again I don't know.
>>>>>>
>>>>>>>> http://en.wikipedia.org/wiki/Bourke_Engine<<
>>>>>>
>>>>>> The problem with Wikipedia is articles may well be written by
>>>>>> competitors.
>>>>>> In the case of the Bourke Engine, they might be disinformation
>>>>>> written
>>>>>> by GM
>>>>>> or Exxon public relations flacks.
>>>>>>
>>>>>> The most I can say is developments in the tiny Bourke engine field
>>>>>> seem
>>>>>> worth watching given the claims made for the engine's performance.
>>>>>> Conventional theoretical wisdom is often overturned by actual
>>>>>> experimental
>>>>>> results. It might develop into a good gasification engine
>>>>>> someday.
>>>>>> Or it
>>>>>> may always be a spurious crackpot 'invention' always needing more
>>>>>> development funding but never delivering any useful results.
>>>>>> Similar
>>>>>> to
>>>>>> hydrogen fusion and enyzmatic conversion of cellulose to ethanol.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Mark
>>>>>>
>>>>>>
>>>>>>> Date: Tue, 15 Aug 2006 09:13:07 -0700
>>>>>>> From: drew <drew at artforging.com>
>>>>>>> Subject: [Gasification] Bourke Engine and Steves Gassifier
>>>>>>> To: Gasification at listserv.repp.org
>>>>>>> Message-ID: <44E1F293.80907 at artforging.com>
>>>>>>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>>>>>>
>>>>>>> The 1936 patent drawings of the bourke engine are here
>>>>>>>
>>>>>>> http://patimg2.uspto.gov/
>>>>>>> .piw?docid=US002122676&PageNum=2&IDKey=B2AB2A5BECE0&HomeUrl=http:
>>>>>>> //
>>>>>>> patft.uspto.gov/netacgi/nph-
>>>>>>> Parser?Sect2=PTO1%2526Sect2=HITOFF%2526p=1%2526u=%25252Fnetahtml%
>>>>>>> 252
>>>>>>> 5%
>>>>>>> 25252FPTO%2525%25252Fsearch-
>>>>>>> bool.html%2526r=1%2526f=G%2526l=50%2526d=PALL%2526S1=2122676.PN.%
>>>>>>> 252
>>>>>>> 6O
>>>>>>> S=PN/2122676%2526RS=PN/2122676
>>>>>>> <http://patimg2.uspto.gov/
>>>>>>> .piw?docid=US002122676&PageNum=2&IDKey=B2AB2A5BECE0&HomeUrl=http:
>>>>>>> //
>>>>>>> patft.uspto.gov/netacgi/nph-
>>>>>>> Parser?Sect2=PTO1%2526Sect2=HITOFF%2526p=1%2526u=%25252Fnetahtml%
>>>>>>> 252
>>>>>>> 5%
>>>>>>> 25252FPTO%2525%25252Fsearch-
>>>>>>> bool.html%2526r=1%2526f=G%2526l=50%2526d=PALL%2526S1=2122676.PN.%
>>>>>>> 252
>>>>>>> 6O
>>>>>>> S=PN/2122676%2526RS=PN/2122676>
>>>>>>>
>>>>>>> A 1994 patent for a similar engine but fancier scotch yoke
>>>>>>>
>>>>>>> http://patft.uspto.gov/netacgi/nph-
>>>>>>> Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-
>>>>>>> bool.html&r=41&f=G&l=50&co1=AND&d=PTXT&s1=bourke&s2=engine&OS=bou
>>>>>>> rke
>>>>>>> +A
>>>>>>> ND+engine&RS=bourke+AND+engine
>>>>>>> <http://patft.uspto.gov/netacgi/nph-
>>>>>>> Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-
>>>>>>> bool.html&r=41&f=G&l=50&co1=AND&d=PTXT&s1=bourke&s2=engine&OS=bou
>>>>>>> rke
>>>>>>> +A
>>>>>>> ND+engine&RS=bourke+AND+engine>
>>>>>>>
>>>>>>>
>>>>>>> The engine looks interesting, the pause at TDC and BDC are
>>>>>>> supposed
>>>>>>> to
>>>>>>> make the engine run better? I don't know? The true linear
>>>>>>> travel
>>>>>>> pistons look interesting. I am not qualified to judge, and
>>>>>>> especialy
>>>>>>> not from the meager info on thier site, or in the patent. I do
>>>>>>> notice
>>>>>>> that on the website they are selling an "revolutionary electronic
>>>>>>> fuel
>>>>>>> cracker" which gives 15% better fuel rating. This sort of add
>>>>>>> does
>>>>>>> little for thier credibility from my point of view.
>>>>>>>
>>>>>>> The 1994 patent is licenced to Collins motor company in
>>>>>>> Austrailia,
>>>>>>> they
>>>>>>> have an artical on thier engine "soon to be released, after a
>>>>>>> bit of
>>>>>>> testing"
>>>>>>> http://www.findarticles.com/p/articles/mi_m3165/is_n4_v27/
>>>>>>> ai_10615466
>>>>>>>
>>>>>>> The wikipedia page
>>>>>>>
>>>>>>> http://en.wikipedia.org/wiki/Bourke_Engine
>>>>>>>
>>>>>>> Says poor NO emissions are what killed it, same as the wankel I
>>>>>>> suppose,
>>>>>>> as higher combustion efficency is obtained, the seemingly
>>>>>>> inevitable
>>>>>>> higher NO. The scotch yoke mechanism seems like it could be
>>>>>>> (and
>>>>>>> has
>>>>>>> been) quite problematic too, if it was huge and heavy like the
>>>>>>> old
>>>>>>> steam gear, maybe, but in a "high output" low weight engine?
>>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>
>>>>>
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>>>>
>>>
>>>
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>
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