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Thread: Oddball engines and prototypes

  1. #181
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    Quote Originally Posted by pete376403 View Post
    I'll see your nuclear aircraft engine and raise you a nuclear rocket engine http://en.wikipedia.org/wiki/Project_Rover
    Named Kiwi
    The first phase of Project Rover, Kiwi, was named after the small flightless bird. It consisted of a series of non-flyable test nuclear engines, with primary focus on improving the technology of hydrogen-cooled reactors. Between 1959 and 1964, a total of eight reactors were built and tested. After conclusion of these experiments in 1964, further efforts were concentrated towards larger and more powerful Phoebus reactors.[4] Kiwi was considered successful proof that nuclear rockets could be considered not only feasible but highly reliable and advantageous for space travel.
    http://www.lanl.gov/science/NSS/issu...ory4full.shtml
    Are you sure it wasn't after William Pickering. Either way Rutherford would be chuffed as well.

    I had heard about this wasn't sure how small it was I understood someone died during its decommioning but I can find nothing about it on the Net

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    US experience of small light water reactors (LWRs) has been of very small military power plants, such as the 11 MWt, 1.5 MWe (net) PM-3A reactor which operated at McMurdo Sound in Antarctica 1962-72, generating a total of 78 million kWh. It was refueled once, in 1970. There was also an Army program for small reactor development, most recently the DEER (deployable electric energy reactor) concept which was being commercialised by Radix Power & Energy. DEER would be portable and sealed, able to operate in the range 3 to 10 MWe, for forward military bases.
    It was nickmaned NUKY POO on account of its frequent breakdowns and leaks
    A US naval report issued upon its decommissioning (downloadable to the right) indicated the reactor experienced 438 malfunctions – nearly 56 a year – in its operational lifetime, including leaking water surrounding the reactor and hairline cracks in the reactor lining.
    Nuclear power 1962-1972 McMurdo Base

    On March 3, 1962, operators activated a nuclear power plant at the station. The plant, like nearby Scott's Discovery Hut, was prefabricated in modules. Engineers designed the components to weigh no more than 30,000 pounds (14,000 kg) each and to measure no more than 8 ft 8 inches by 8 ft 8 inches by thirty feet (2.6 × 2.6 × 9.1 m). A single core no larger than an oil drum served as the heart of the nuclear reactor. These size and weight restrictions were intended to allow the reactor to be delivered in an LC-130 Hercules aircraft. However, the components were actually delivered by vessel. The reactor generated 1.8 MW of electrical power[5] and reportedly replaced the need for 1,500 US gallons (5,700 l) of oil daily.[6] Engineers applied the reactor's power, for instance, in producing steam for the salt water distillation plant. As a result of continuing safety issues, the U.S. Navy Nuclear Power Program decommissioned the plant in 1972. After the nuclear power station was no longer operational, conventional diesel generators were used. There were a number of 500 kW diesel generators in a central powerhouse providing electric power. A conventionally fueled water desalination plant provided fresh water

    20 minutes in.
    One of the videos I watched had a 25mm space gun the Russian test fired on a Defunct satellite, no air in space so would that mean it would go superfast on and on if it missed.

    http://www.world-nuclear.org/info/Co...ar-Power/#FNPP
    http://bellona.org/news/nuclear-issu...as-fnpp-fetish
    http://en.wikipedia.org/wiki/McMurdo_Station
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  2. #182
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    Fig. 3. Robert Hanrahan stands between the Kiwi-A (left) and Phoebus-1 (right). Phoebus-1 is now at the Atomic Testing Museum in Las Vegas, Nevada. Hanrahan is now director of the Office of Nuclear Experiments for the National Nuclear Security Administration. Archival photo courtesy of Robert Hanrahan.
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    it's not a bad thing till you throw a KLR into the mix.
    those cheap ass bitches can do anything with ductape.
    (PostalDave on ADVrider)

  3. #183
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    Quote Originally Posted by pete376403 View Post
    Fig. 3. Robert Hanrahan stands between the Kiwi-A (left) and Phoebus-1 (right). Phoebus-1 is now at the Atomic Testing Museum in Las Vegas, Nevada. Hanrahan is now director of the Office of Nuclear Experiments for the National Nuclear Security Administration. Archival photo courtesy of Robert Hanrahan.
    I think the reactor core at Mcmurdo was meant to be the size of a 44 Gallon Drum.
    Question is where and how the heck were they going to store all that water or was it not water? Sodium maybe......
    The pre 3 mile 3 mile island.... be a good system though it the sealing could be fixed
    http://en.wikipedia.org/wiki/Sodium_Reactor_Experiment

    Scratch that he bothers to read the links lol its a nuclear rocket..........
    I was thinking an outer space propulsion engine
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  4. #184
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    I was googling scotch crank two stroke and came up with this.http://ecomodder.com/forum/showthrea...ring-5114.html

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    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  5. #185
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    Quote Originally Posted by husaberg View Post
    I was googling scotch crank two stroke and came up with this.
    The Scotch Yoke has been around a long time but the good old conrod won through. Apparently the scotch Yoke (with normal straight slot) gives even dwell duration at TDC and BDC and this wouldn't be right for two strokes, whereas the conrod gives a longer dwell at BDC.
    There are several ways of changing the dwell, one example being given here, but none seem to have worked out well on IC engines.
    Got nothing to verify this at the moment though, but I remember reading it somewhere a long time ago.

    I first learnt about the Scotch yoke when I found that our little grey Ferguson Tractor used one as a hydraulic pump, - it was very successful innovation then, ie. way back in the nineteen fifties.

  6. #186
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    Quote Originally Posted by WilDun View Post
    The Scotch Yoke has been around a long time but the good old conrod won through. Apparently the scotch Yoke (with normal straight slot) gives even dwell duration at TDC and BDC and this wouldn't be right for two strokes, whereas the conrod gives a longer dwell at BDC.
    There are several ways of changing the dwell, one example being given here, but none seem to have worked out well on IC engines.
    Got nothing to verify this at the moment though, but I remember reading it somewhere a long time ago.

    I first learnt about the Scotch yoke when I found that our little grey Ferguson Tractor used one as a hydraulic pump, - it was very successful innovation then, ie. way back in the nineteen fifties.
    I scotch crank should have a higher potential rev sealing less friction and exert more leverage on the crankshaft at mid stroke.
    I had a TEA until recently I thought it was a plunger pump I guess it was both. The little Fergy had poor flow but awesome pressure. It could dead lift near 1 tonne.
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  7. #187
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    Quote Originally Posted by husaberg View Post
    I scotch crank should have a higher potential rev sealing less friction and exert more leverage on the crankshaft at mid stroke.
    There would be much less stress on the piston with side thrust removed (or nearly removed).
    I think there would probably be a little sidethrust on the piston when the whole thing tried to tilt, ie. around mid stroke. That could be prevented by a deeper"crosshead" I guess, but there would be a lot more weight of course.
    Probably the conrod wins at least in high speed operation like an engine.

    Most farmers had no interest whatever in maintenance when I was a kid, they never topped up the oil in the hydraulics on the TEA and the the arms used to bob up and down with each stroke of the pump - bloody savages! all they cared about was how many acres they had ploughed that day and how big their milk cheque was!
    The mighty little TEA still survived it all though.

  8. #188
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    Quote Originally Posted by WilDun View Post
    There would be much less stress on the piston with side thrust removed (or nearly removed).
    I think there would probably be a little sidethrust on the piston when the whole thing tried to tilt, ie. around mid stroke. That could be prevented by a deeper"crosshead" I guess, but there would be a lot more weight of course.
    Probably the conrod wins at least in high speed operation like an engine.

    Most farmers had no interest whatever in maintenance when I was a kid, they never topped up the oil in the hydraulics on the TEA and the the arms used to bob up and down with each stroke of the pump - bloody savages! all they cared about was how many acres they had ploughed that day and how big their milk cheque was!
    The mighty little TEA still survived it all though.
    The Fergy had very touchy hydraulics at least on mine they were, either up or down nothing in between.

    I will scan the pros and cons of the scotch yoke but I think it has definate advantages the big factor against it is it small area to breath from as the area below the seal is not part of the crankcase.

    As for the asymmetrical timing with the scotch yoke have a look at this.
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    I have a bit of an idea forming based on another oddball engine that likely never seen production along the idea of Frits FOS but the way I see it the exhaust would be at the bottom of the cylinder.
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  9. #189
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    Bourke Engine
    http://bourke-engine.com/vlb/
    http://bourke-engine.com/
    30-50:1 air ratio engine
    One stroke like a gun.
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    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  10. #190
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    Quote Originally Posted by husaberg View Post
    The Fergy had very touchy hydraulics at least on mine they were, either up or down nothing in between.

    I will scan the pros and cons of the scotch yoke but I think it has definate advantages the big factor against it is it small area to breath from as the area below the seal is not part of the crankcase.
    The engine wouldn't necessarily need to have a crankcase seperated from the cylinder/piston, but I must say that the whole assembly would make for a lot of reciprocating weight!
    Also if you make a convoluted slot to get rid of the symmetrcal movement you would probably be stressing things a little and have some problems at high revs! - not to mention balance problems!

    See what I mean! - in the second picture the whole bloody thing is out of control!!

    As I always say, try it anyway and then you'll know whether I'm right or wrong (cos I don't).

    Your Fergie may have had some issues with the control lever (ie.valve) but again, just a guess.

  11. #191
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    Quote Originally Posted by WilDun View Post
    The engine wouldn't necessarily need to have a crankcase seperated from the cylinder/piston, but I must say that the whole assembly would make for a lot of reciprocating weight!
    Also if you make a convoluted slot to get rid of the symmetrcal movement you would probably be stressing things a little and have some problems at high revs! - not to mention balance problems!

    See what I mean! - in the second picture the whole bloody thing is out of control!!

    As I always say, try it anyway and then you'll know whether I'm right or wrong (cos I don't).

    Your Fergie may have had some issues with the control lever (ie.valve) but again, just a guess.
    There is slipper wear granted but if it is an opposed cylinder design it has less inertia stress. it is cushioned at tdc and bdc.
    It also only has linear movement so less friction.
    Plus yes with separate stokes it will have imbalance but I don't see it as a huge issue.
    Likely because it will never happen LOL
    15000prm is achievable.
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  12. #192
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    Quote Originally Posted by husaberg View Post
    There is slipper wear granted but if it is an opposed cylinder design it has less inertia stress. it is cushioned at tdc and bdc.
    It also only has linear movement so less friction.
    Plus yes with separate stokes it will have imbalance but I don't see it as a huge issue.
    Likely because it will never happen LOL
    15000prm is achievable.
    Yes, it's cushioned ok but with two pistons and a strong heavy crosshead (slipper) all going one way and then reversing? ........
    I always liked the concept though and maybe I could try it after I get the foundry stuff in operation, sort out my dividing head, build a toolpost grinder, sheetmetal rolls, a press, rebuild a little lathe and do numerous odd jobs for others etc.etc. then i'll get on to it.
    Hopefully everything will be finished and ready to give to some lucky person when I finally expire!

    15000rpm ? .........In your dreams.

  13. #193
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    Quote Originally Posted by WilDun View Post
    15000rpm ? .........In your dreams.
    The rpm figure came from KG Draper a two stroke design engineer.
    In a book written when 10000 rpm was a lot.
    The reasoning given is the centrifugal forces are only acting on the slipper.
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  14. #194
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    Quote Originally Posted by husaberg View Post
    The rpm figure came from KG Draper a two stroke design engineer.
    In a book written when 10000 rpm was a lot.
    The reasoning given is the centrifugal forces are only acting on the slipper.
    I think I may have that book somewhere and remember something about the Scotch yoke in it - must try and dig it up.
    The difference between Draper and Dr Gordon Blair is that Draper was around at a time when not much (two stroke at least) development work was being done - his work seemed to be all theory, never really building much, (but I may be wrong), whereas Blair had the best of both worlds being backed by Queen's University and using their facilities and a team of enthusiasts to produce actual successful one off racing machines and do development work for others, (Yamaha being one, he did a lot of development work for them).

    I guess Draper was born at the wrong time!, I would imagine that the time between the wars and just after WW2 was not a good time to do this sort of work, but maybe I just hadn't heard about some of the other stuff he may have done.

  15. #195
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    Everything odd and quite a few that are not great site with animations and annotations as well.

    http://www.3d-meier.de/tut16/Seite0.html
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

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