blakep82
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| posted on 30/5/09 at 06:42 PM |
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Roton engine heads
has anyone else heard of these? they look pretty awesome. can't think why no one has thought of these as an alternative to valves and valve
springs before.
as far as i can tell, you've got a cam, but instead of lobes, its just full of hole to allow air to flow through.
http://www.rotonusa.com/animations.html
http://www.blitzworld.co.uk/content.php?categoryId=122
i'd like to see a full range of these to cover all the popular engines
god i sound like a salesman, they're nothing to do with me obviously, they look really good to me though
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IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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zilspeed
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| posted on 30/5/09 at 06:51 PM |
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quote:
Originally posted by blakep82
has anyone else heard of these? they look pretty awesome. can't think why no one has thought of these as an alternative to valves and valve
springs before.
as far as i can tell, you've got a cam, but instead of lobes, its just full of hole to allow air to flow through.
http://www.rotonusa.com/animations.html
http://www.blitzworld.co.uk/content.php?categoryId=122
i'd like to see a full range of these to cover all the popular engines
god i sound like a salesman, they're nothing to do with me obviously, they look really good to me though
I remember reading an article a long time ago about an engine called a Bonner which had rotary valves.
Valves were very very similar.
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Rod Ends
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| posted on 30/5/09 at 06:55 PM |
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Just a variation on rotary valves. They've been around forever.
99.9999% (guess) of (4-stroke) i.c. engines use poppet valves - there's probably a reason for that. 
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blakep82
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| posted on 30/5/09 at 06:56 PM |
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i've never come across them before
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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CaptainJosh
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| posted on 31/5/09 at 09:16 AM |
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At Swansea uni they have a ford 302 running with twin rotary valve heads.
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gazza285
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| posted on 31/5/09 at 10:06 AM |
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Having built similar engines for use in the Shell Eco-Marathon we ran into several problems, main one being that the rotating shaft takes lots of
power to rotate due to having the combustion force acting upon it. Other problems included sealing, differing expansion to the head and concequent
siezing/wearing and the costs involved in the precision manufacturing. Rotary valves are good in high flow, low pressure applications.
DO NOT PUT ON KNOB OR BOLLOCKS!
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