Subject:
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Re: Radial Engine (and V8 crankshaft)
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Newsgroups:
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lugnet.technic
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Date:
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Sun, 20 Feb 2005 22:04:35 GMT
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Viewed:
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3704 times
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In lugnet.technic, Nathan Bell wrote:
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In lugnet.technic, Ross Crawford wrote:
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In lugnet.technic, Nathan Bell wrote:
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Now if someone can figure out a way to arrange a
(Lego) V8 crankshaft to bend 4 directions instead of 2, I will repent from
the sin of butchering Legos!
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Here is my V8 with 5 bearings. It has standard small block chev firing
order, and uses the FOS system to simulate spark plugs/injectors. The only
downside is that using the Technic mounts means it doesn’t have the correct
90 degree angle between cylinder heads.
I’ve also found the friction is somewhat greater than normal, this may be
because the crankshaft pieces force a width slightly greater than 2 studs,
but I haven’t tested that theory yet. I built it for use in another project
which has been on the backburner for a while.
(Links to folder when moderated)
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Good design Ross!
I was actually talking about the crankshaft; not the firing order. To
clarify more, I meant that if someone can make a crankshaft that goes 4
directions and also fits into TLC’s modern cylinder-piston design (while also
not changing their tight “V” design), I will implement their design and quit
butchering legos. Whenever we get a new camera cartridge, I’ll post a
picture of my butchered 4-directioned V8 crankshaft.
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It’s hard to see in those pics, but the crankshaft DOES go in 4 directions to
get the correct firing order, big ends 1&4 are 180 degrees apart, and 2&3 are
also 180 degrees from each other and 90 degrees from 1&4 (see below). The extra
stud between each big end, as well as allowing a bearing, also allows the use of
#2 axles to get the 90 & 180 degree offsets. It makes the engine longer (meaning
the “spark plug cable” to the farthest cylinder is actually a bit of a stretch),
but I was happy with the compromise.
Cylinders:
1-2
3-4
5-6
7-8
Crankshaft:
Firing order: 1-8-4-3-6-5-7-2
ROSCO
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Message has 1 Reply:
 | | Re: Radial Engine (and V8 crankshaft)
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| (...) UH OH! I forgot to specify the length. Oh well, Rosco wins. Any butchered legos I have will stay where they are, but NO MORE BUTCHERING LEGOS! (future tense) I'll post some pictures of the 3 butchered crankshafts I have as soon as I can. (...) (20 years ago, 21-Feb-05, to lugnet.technic, FTX)
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Message is in Reply To:
| | Re: Radial Engine (and V8 crankshaft)
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| (...) Good design Ross! I was actually talking about the crankshaft; not the firing order. To clarify more, I meant that if someone can make a crankshaft that goes 4 directions and also fits into TLC's modern cylinder-piston design (while also not (...) (20 years ago, 20-Feb-05, to lugnet.technic, FTX)
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