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hugo
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Posted: Tue Aug 5th, 2008 01:47 pm |
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All will become clear in the September issue…
The ‘Knight sleeves’ were still no match for the poppet valve engine but then came the Burt sleeve-valve. The double, telescoping sleeves were activated by two cranks and connecting rods but he transposed the crankshaft through 90 degrees, stuck the crank pin in a hole in just one sleeve and, thus, pushed it up and down and twisted it on its axis at the same time producing a nearly circular motion of the outer surface of the sleeve relative to its encasing barrel.
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Frankfurt-Beesa
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Posted: Tue Aug 5th, 2008 03:04 pm |
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That is either very interesting, in the right context, or you have really lost the plot and need some of McNuts special tablets.
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Velton
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Posted: Tue Aug 5th, 2008 03:07 pm |
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Alternatives to the poppet valve engine?
Rotary valves, split singles, stuff like that?
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Frankfurt-Beesa
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Posted: Tue Aug 5th, 2008 03:12 pm |
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Prototype Burt Sleeve-Valve Engine
Not half as daft as I pretend to be
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ClassicMCnut
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Posted: Tue Aug 5th, 2008 05:53 pm |
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Frankfurt-Beesa wrote: Prototype Burt Sleeve-Valve Engine
Not half as daft as I pretend to be
Oh I wouldn't say that FB
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hugo
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Posted: Tue Aug 5th, 2008 08:44 pm |
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That's exactly what we're talking about. Thanks F-B
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Hooli
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Posted: Tue Aug 5th, 2008 09:31 pm |
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Frankfurt-Beesa wrote:
Not half as daft as I pretend to be
i dont believe your pretending
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ScotDuke
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Posted: Fri Aug 8th, 2008 02:51 pm |
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Frankfurt-Beesa wrote: Prototype Burt Sleeve-Valve Engine
Not half as daft as I pretend to be
Sleeve valves were used in the super ugly Voisin cars of the 1930s. These luxury cars were 'aerodynamically inspired' given the Voisin brothers' experience of making aircraft but the engines were easily damaged if revved too hard. I know sleeve valves were also used in various aero engines and British-built radials of the 1920s-1940s in particular. Some of these British radial aero engines with sleeve valves were quite successful - so perhaps they used the Burt system?Last edited on Fri Aug 8th, 2008 02:52 pm by ScotDuke
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Hooli
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Posted: Fri Aug 8th, 2008 06:51 pm |
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typhoons & tempests had sleeve valve engines too. about 2000bhp & a tendancy to explode on startup, but that could have been the coffman starter system.
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sportspecial
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Posted: Sat Aug 9th, 2008 04:53 am |
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hugo wrote: All will become clear in the September issue…
The ‘Knight sleeves’ were still no match for the poppet valve engine but then came the Burt sleeve-valve. The double, telescoping sleeves were activated by two cranks and connecting rods but he transposed the crankshaft through 90 degrees, stuck the crank pin in a hole in just one sleeve and, thus, pushed it up and down and twisted it on its axis at the same time producing a nearly circular motion of the outer surface of the sleeve relative to its encasing barrel.
And they were not a match either, or we would be driving one today.........
The very best mechanical devices are always the most simple designs.
Some fantastic machines have been built, works of complicated art that defeat nature for a while, but they all fall apart under the glare of father time.
It takes energy to forge matter into unatural and complicated shapes. It is one law of thermodynamics that energy always moves towards lower states. In fact the whole universe is moving towards a lower energy state at this time.
The simple things take the least energy to create and it seems they stand up against time better before returning to their base elements.
Complicated things that are put together with great amounts of energy and effort in an attempt to defeat or overcome some part of nature always seem as if they can hardly wait to stop working, get thrown in a corner and oxidize back to whence they came.
Ok I am done now...........
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ScotDuke
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Posted: Sat Aug 9th, 2008 02:46 pm |
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Hooli wrote: typhoons & tempests had sleeve valve engines too. about 2000bhp & a tendancy to explode on startup, but that could have been the coffman starter system.
There is a Typhoon airworthy now I believe. The Napier Sabre engine was notorious.
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NeilD
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Posted: Sat Aug 9th, 2008 05:07 pm |
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ScotDuke wrote:
There is a Typhoon airworthy now I believe. The Napier Sabre engine was notorious.
unfortunately only Typhoon flying currently is the pointy/noisy/plastic one... still some Sea Furys though with their original sleeve-valve Centaurus engines...
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Hooli
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Posted: Wed Aug 20th, 2008 07:33 pm |
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ScotDuke wrote: Hooli wrote: typhoons & tempests had sleeve valve engines too. about 2000bhp & a tendancy to explode on startup, but that could have been the coffman starter system.
There is a Typhoon airworthy now I believe. The Napier Sabre engine was notorious. i've seen something about a project to get one airworthy, i suspect it'll be a while though.
i've got perrie colsterman's book the big show somewhere, excellent story of a frenchman in the RAF during WW2. lots of tempest stuff in the second half of it too.
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ScotDuke
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Posted: Wed Aug 20th, 2008 10:45 pm |
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NeilD wrote: ScotDuke wrote:
There is a Typhoon airworthy now I believe. The Napier Sabre engine was notorious.
unfortunately only Typhoon flying currently is the pointy/noisy/plastic one... still some Sea Furys though with their original sleeve-valve Centaurus engines... I think there are a few Sea Furys competing in the Reno air races. There were at least.
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ScotDuke
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Posted: Wed Aug 20th, 2008 10:47 pm |
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Hooli wrote: ScotDuke wrote: Hooli wrote: typhoons & tempests had sleeve valve engines too. about 2000bhp & a tendancy to explode on startup, but that could have been the coffman starter system.
There is a Typhoon airworthy now I believe. The Napier Sabre engine was notorious. i've seen something about a project to get one airworthy, i suspect it'll be a while though.
i've got perrie colsterman's book the big show somewhere, excellent story of a frenchman in the RAF during WW2. lots of tempest stuff in the second half of it too.
If you like WWII pilot stories I suggest you get hold of Roald Dahl's book about his experiences flying first Gloster Gladiators and then Hurricanes in Greece. I never knew he'd beena WWII fighter pilot until I came across this by accident. it's extremely well written as you'd expect and brings across the emotions he went through in a way few other (of the many) books I've read managed to achieve.
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Velton
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Posted: Thu Aug 21st, 2008 01:36 am |
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What's the title of the book, ScotDuke?
Sounds good! 
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Frankfurt-Beesa
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Posted: Thu Aug 21st, 2008 04:46 am |
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ScotDuke wrote: Hooli wrote: ScotDuke wrote: Hooli wrote: typhoons & tempests had sleeve valve engines too. about 2000bhp & a tendancy to explode on startup, but that could have been the coffman starter system.
There is a Typhoon airworthy now I believe. The Napier Sabre engine was notorious. i've seen something about a project to get one airworthy, i suspect it'll be a while though.
i've got perrie colsterman's book the big show somewhere, excellent story of a frenchman in the RAF during WW2. lots of tempest stuff in the second half of it too.
If you like WWII pilot stories I suggest you get hold of Roald Dahl's book about his experiences flying first Gloster Gladiators and then Hurricanes in Greece. I never knew he'd beena WWII fighter pilot until I came across this by accident. it's extremely well written as you'd expect and brings across the emotions he went through in a way few other (of the many) books I've read managed to achieve.
My dad flew a Typhoon and and it never exploded once, at least not until after he crashed it. He did however break an awful lot bones and stuff, and spent the rest of WWII in a Hospital.
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NeilD
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Posted: Thu Aug 21st, 2008 04:03 pm |
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ScotDuke wrote: : I think there are a few Sea Furys competing in the Reno air races. There were at least.
yep although I think they'r all re-engined with American radials.. theres a couple of Tempests under restoration over here with the original engines, although one has been 'nearly there' for the last couple of years.. the Royal Navy Historic Flight operate a Sea Fury with orig Bristol power, and have just aquired another one..
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