#garfield Logs

Nov 06 2013

10:53 katsmeow-afk if you are removing posts from a forum, are you engaged in deposturization?
11:10 katsmeow-afk http://www.ebay.com/itm/19V-4-74A-90W-AC-Adaptor-Charger-Acer-TravelMate-6593-Aspire-8930-8920-8730-/200979295149 $7.32 free s&h
12:21 rue_house why are you circling over adapters anyhow kat?
15:29 katsmeow-afk just fascinated by the price variations
15:29 katsmeow-afk $6.89 from one seller, is $14 from someone else
15:30 katsmeow-afk humans will buy 99 cents + $11 s&h, instead of $3 + $6 s&h , or even $9 + free s&h
15:30 katsmeow-afk it's wierd
15:57 Tom_itx rue_house, i wound up having to get a new blower motor. apparently the bushings were worn enough to cause the stator / rotor to bind or come close enough to cause it to stall on startup occasionally
15:57 Tom_itx they checked the run cap and it was good
15:57 Tom_itx it was a rather random problem i've been having for a few weeks
16:06 rue_house :) did you ever oil it?
16:06 rue_house did you hear it rubbing!? something sounds suspicious
16:10 Tom_itx i oiled it yes
16:11 Tom_itx i also checked it by hand
16:11 Tom_itx i could turn it and it would start
16:53 katsmeow-afk Tom, i think rue means "oil it every 6 months since the day you got it"
16:53 katsmeow-afk it's already dark outside :-(
16:55 katsmeow-afk found a problem with the bandsaw: sawing pvc, the swarf builds up under the table and above the guide bearings, until it builds up, breaks off, and jams the blade solidly stopped in the guide bearings
16:56 katsmeow-afk this happens about every 8 - 10 inches, and then the drive wheel tends to throw the blade off
17:06 rue_bed add brush
17:06 rue_bed tom, still have the old motor?
17:06 rue_bed I'm suspicious
17:08 rue_bed I replaced the shaft on a small fan motor recently due to the brass bushing wearing into it
17:09 katsmeow-afk what would be a proper part number of an industry sprocket made to take bike chain?
17:10 katsmeow-afk for instance, it's not 40B8
17:10 rue_bed bike chain dos't have an official numer does it?
17:10 rue_bed there are two guages
17:11 rue_bed widths
17:11 katsmeow-afk right, at least 2 , "normal" and "skinny deraleur"
17:11 katsmeow-afk Chains come in either 11/128", 3/32", 1/8", 5/32", or 3/16" roller widths, the internal width between the inner plates.
17:12 katsmeow-afk but i see no numbers to buy a 8 or 10 tooth bike sprokect of any flavor
17:13 Tom_itx the new one doesn't have oil holes
17:13 rue_bed you just replace it
17:13 Tom_itx they did tell me to orient it in a certain way so the place where they should be would face up
17:13 katsmeow-afk replace what?
17:13 Tom_itx apparently there is a wick inside but not accessable
17:14 Tom_itx i still have the old one yes
17:14 katsmeow-afk Tom, a wick in some of the starter motors too, dried totally out in months
17:14 Tom_itx i may find bushings for it and replace them for a spare
17:14 katsmeow-afk make ball bearing mounts for it ;-)
17:14 Tom_itx i told them i was gonna drill them out and they didn't like that
17:14 katsmeow-afk heh
17:16 Tom_itx i can't afford to mail your stuff
17:16 katsmeow-afk ?
17:16 tsmeow-afk had offered pay
17:17 katsmeow-afk seems silly to make the parts and then throw them away
17:17 Tom_itx also had to get a laptop battery today
17:17 Tom_itx oh and apparently find new insurance
17:18 Tom_itx at least they haven't shut the power off yet
17:19 tsmeow-afk doesn't understand why they w
17:21 katsmeow-afk <cough>
17:21 katsmeow-afk so do you have a paypal acct?
17:22 Tom_itx when i get a chance i'll make another 'good' other endbell (1st one) then send both
17:23 Tom_itx i have pp yes
17:23 katsmeow-afk i can pp you the fees you charge for this sorta service
17:23 Tom_itx i'll donate time
17:23 Tom_itx the actual out of pocket is all i require
17:23 katsmeow-afk :-)
17:23 katsmeow-afk ok
17:24 katsmeow-afk lemme know
17:24 Tom_itx the hunk of aluminum was 10 and i can get a few more from it
17:24 Tom_itx you know what postage is
17:24 Tom_itx i don't remember
17:24 katsmeow-afk i didn't look
17:26 katsmeow-afk can't look, it's upstairs atm
17:32 katsmeow-afk got it
17:34 Tom_itx i'm in no rush really. just having a bad day
17:35 tsmeow-afk does not seem to have your email
17:36 Tom_itx pp is tlight9 at cox dot net
17:39 katsmeow-afk <ding> you have email <ding>
17:42 Tom_itx shipping wasn't _that_ much
17:43 katsmeow-afk right, it was $3.65
17:43 katsmeow-afk times 2
17:43 katsmeow-afk plus materials and expendables
17:43 Tom_itx i'm expendable?
17:44 katsmeow-afk no, i meant the electricity, cutting tip, beer, etc
17:44 katsmeow-afk shop heat
17:44 Tom_itx the machines provide that
17:45 katsmeow-afk you never gave me a number, so i guessed
17:46 katsmeow-afk i am just bloody lucky you are donating time to a proof of concept
17:48 Tom_itx well thanks
17:50 katsmeow-afk praps once the design is settled, (and there's two or 3 different brush holder end bells), you can put together a kit on ebay for upgrading these motors
17:50 Tom_itx i'm not sure that would be worth the time it takes for what they would pay
17:51 Tom_itx if i had a cnc lathe it may be a different story
17:51 katsmeow-afk they pay $65 and up for small drill motors for battle bots
17:53 katsmeow-afk http://www.ebay.com/sch/i.html?_sacat=0&_from=R40&_nkw=motor+battle+bot&_sop=3
17:54 katsmeow-afk not quite sure how to search for something i have no interest in
18:04 tsmeow-afk wonders, on Star Trek, when they need more hp from the engines, they don't use the replicators to make more eng
18:05 katsmeow-afk they can't make fuel that way, but they could get mor power immeadiatly from the available fuel
18:39 rue_house replicators cant do complex molecules
18:40 katsmeow-afk yeas they can, they do protiens and acrbs in the food they eat
18:40 katsmeow-afk and vitamins and amino acids
18:42 rue_house but they grow stuff cause the replicators aren't as good
18:42 katsmeow-afk oh
18:43 rue_house or so I'v been lead to beleive
18:45 tsmeow-afk has never seen a garden on the Enterp
18:51 rue_house voyager does
18:51 rue_house technically the enterprise only has 1 bathroom too
18:51 rue_house must be quite a lineup
18:52 katsmeow-afk i noticed something on the new Enterprice, the forstone with the new Spock and Nemoy, the turbolift off the bridge is also part of the corridor to the same set of bridge doors
18:53 katsmeow-afk first one
18:53 katsmeow-afk in one scene, there front and back door of the elevator are both open, and you cansee down the corridore
18:54 katsmeow-afk they couldn't afford two doors
18:54 katsmeow-afk one for the turbolift, and one for the corredore
18:54 katsmeow-afk door
18:54 katsmeow-afk corridor door
18:55 katsmeow-afk dart it, dinner is getting cold again
18:56 rue_house http://upload.wikimedia.org/wikipedia/en/5/5d/Royer_oscillator.gif
18:56 rue_house is it me, or are those waveforms wrong
19:45 katsmeow-afk just a tip: do not replace the green stuff on the kids' halloween candy with wasbi sauce
19:45 Tom_itx ok at least i've got them drawn up in cad with proper dimensions now
19:46 katsmeow-afk rue, they won't be sine waveforms, i don't expect, unless you are near the core's freq and saturation limits
19:54 katsmeow-afk today has been such a drain, does anyone know why?
19:57 rue_house kat did you know about them hiding two cylinders on the inside of the frame for steam locomotives?
19:58 rue_house blooming 4 cylinder engies and you cant tell
19:59 katsmeow-afk some have them, some do not
20:00 katsmeow-afk it wasn't common because it put the crank throw so far from the wheels, pushed the boiler up high
20:01 rue_house ah
20:01 katsmeow-afk Tiggr prolly has 20 gigabytes on trains
20:02 rue_house I'm a locophile :)
20:02 katsmeow-afk there were so many issues in steam engines, it wasn't often that more than 3 were made of each model
20:02 Tom_itx are you turning into flyback?
20:02 rue_house hell no
20:02 katsmeow-afk my step-grandfather worked the railroads this whole life
20:02 Tom_itx he likes locomotives as well
20:02 rue_house I wonder if the royal hudson is still doing its run
20:03 Tom_itx my uncle worked for them
20:03 rue_house kat, from the video I saw (I could tell the facts were mixed up) the fireboxes were sometimes copper?
20:03 rue_house I'm pretty sure the boiler tubes were copper
20:03 katsmeow-afk copper lined, trying to save weight and keep the flames off the steel
20:03 katsmeow-afk no, steel
20:04 rue_house ah, corrosion resistance
20:04 rue_house the boiler tubes were steel?
20:04 katsmeow-afk firebrick tended to getheavy and wear fast
20:04 tsmeow-afk
20:04 katsmeow-afk and boiler tube explosions were common
20:04 rue_house why are they always stolen out of old boilers?
20:04 katsmeow-afk keeping them sloped to shed sludge was a big problem when going up/down mountains
20:05 rue_house maybe I should ask you design points for felt-sealed pistons
20:06 Tom_itx leather
20:06 katsmeow-afk i lost count, bu there were prolly a dozen locomotives built at a slope so the boiler was level (and the firetubes sloped appropriately) when going up/down mountains
20:06 rue_house I think you use two peices, cupped in opposite directions?
20:06 katsmeow-afk leather
20:06 rue_house oh
20:06 katsmeow-afk or a tube, center-clamped
20:06 rue_house leather is an important difference
20:07 katsmeow-afk leather is air-tight, stuff gets blown thru felt
20:07 rue_house Tom_itx, how do you know... why am I the odd one out
20:08 katsmeow-afk also, when the fibers get puleld out of the felt, it gets turned into rope and jambs things
20:08 Tom_itx leather was used for alot of things back then
20:08 e_house wonders how you seam a leather tub
20:08 rue_house and how to connect it to a piston
20:08 tsmeow-afk shows rue a bike
20:09 rue_house hmm
20:09 e_house does some 3d manipulations and dosn't like the tolera
20:09 katsmeow-afk the center of the tube doesn't need to be airtight, the edges are what's sealing
20:09 rue_house but it would shift back and forth
20:09 Tom_itx the piston seal would be leather with metal on each side to hold it in place
20:09 katsmeow-afk not in a piston groove
20:09 Tom_itx like 2 flat washers on a bolt
20:09 katsmeow-afk shifting is ok, there's not much shifting
20:10 Tom_itx with leather inbetween
20:10 rue_house oh, its efffectivly shrink wrapped around the piston
20:10 katsmeow-afk there's clearance in all piston rings, specially when cold, they move freely
20:10 katsmeow-afk you know how boats were caulked with moss, rope, felt, etc?
20:10 rue_house ok I have ideas
20:10 Tom_itx i forget how much now..
20:10 Tom_itx maybe .020?
20:11 rue_house damn thats thin leather
20:11 Tom_itx no silly
20:11 Tom_itx ring clearance
20:11 rue_house even my welding gloves are thicker than that
20:11 rue_house ah
20:11 katsmeow-afk i dunno the dimensions on the steal engines, but car engines is just a few thou
20:11 Tom_itx i always staggered them as i'm sure everyone else does
20:12 katsmeow-afk the point of the tube was so you can nsert a rib and bolt the rib down over the leather edges inside at the bottom of the piston groove, and not have boltholes around the edges where you want sealing
20:13 katsmeow-afk but in 250 yrs, everything was tried at least once, till it killed an engineer or two
20:17 rue_house kat, could I bother you to draw that for me?
20:17 katsmeow-afk http://upload.wikimedia.org/wikipedia/commons/1/1d/1830s_beam_engine_piston_with_rope_seal,_Coalbrookdale_Museum_of_Iron.jpg
20:17 Tom_itx rue_house are you making a steam powered something?
20:18 rue_house that has to be one hell a sloppy seal
20:18 rue_house Tom_itx, I'm getting closer
20:19 katsmeow-afk not really, it's inches across, and wound tightly, then oiled while running, very little steam would get by the rope
20:19 rue_house that piston looks completely made out of wood...
20:19 Tom_itx it would also swell with the steam and heat
20:19 rue_house hmm
20:19 Tom_itx it's made just like i described above
20:20 Tom_itx stack several layers of leather inbetween some steel washers
20:20 rue_house too bad they dont have more of the engine :)
20:20 rue_house have to find some leather tho
20:20 rue_house speaking, of, where are my cats...
20:21 katsmeow-afk you know how air pressure keep s abike tire forced out against the rim?
20:21 Tom_itx you should join #linuxcnc and ask, several of the guys there work on or help maintain steam engines from way back
20:21 Tom_itx across the pond
20:21 katsmeow-afk now imagine you had a thin wedge insert you bolted down inside the tire to hold the tire against the rim
20:21 Tom_itx for pumps etc
20:21 katsmeow-afk now instead of a wheel rim it was just the flat bottom og a piston ring vroove
20:22 rue_house I'll gather more questions first
20:24 Tom_itx i got a little steam engine in the attic
20:24 katsmeow-afk http://www.practicalmachinist.com/vb/attachments/f19/39686d1320084533-cylinder-repair-dsc00477small.jpg
20:24 Tom_itx my grandfather made it for me when i was somewhat younger
20:25 rue_house I have one in the livingroom
20:25 rue_house mine was bought
20:26 rue_house kat, borrring :)
20:27 katsmeow-afk lol : http://upload.wikimedia.org/wikipedia/commons/d/d8/Macduff,_High_and_dry_-_geograph.org.uk_-_1374026.jpg
20:27 rue_house I love the way they just slung belts everywhere
20:28 rue_house from the waterline you wolnd't expect 4 decks
20:30 katsmeow-afk the boat is tall as it is long
20:30 katsmeow-afk i got a tour of one of these yrs ago : http://www.stirlingengines.org.uk/gifs/sunpower/mcd.gif
20:30 katsmeow-afk the fan in them is pretty darnedloud
20:33 katsmeow-afk in the olden daze, you could also get a lead rope to make seals with, plumbers used them to pound into the olde cast iron drain pipes
20:37 Tom_itx or rope them and pour hot lead in the seam
20:39 katsmeow-afk http://www.cruquiusmuseum.nl/statusreport/cruqstat_files/image010.gif
20:39 katsmeow-afk Chamber of central piston. The one-piece junk ring was broken, and had been repaired with iron strips bolted to the top. The gasket type varied, more or less as in the outermost chamber, and much of it was difficult to remove. Surprisingly, the two layers behind the bottom ring were in fairly good condition; the narrow bottom layer consisted of twisted rope instead of plaited sinnet.
20:40 katsmeow-afk A few pieces of flat sinnet, obviously saturated with graphited grease, were solidified to a hard and brittle mass. This packing was, of course, exposed to fresh boiler steam. This may also have been a reason to make the bottom ring of bronze, and to fit it quite accurately.
20:40 katsmeow-afk There is no appreciable gap between the four segments. It is not known whether this bronze ring is original. The gap below the chamber is about 7-10 mm wide. A sawblade was passed all around all the same, to make certain the gap is open.
20:40 katsmeow-afk Bootsgezel writes in [13] : The engine could work seven full days with one set of packings. In years past a kind of spun yarn packing boiled in tallow with black lead was used of rectangular cross section of 80x80 mm , but he gives no source for this statement. The size appears on the large side, and the many different layers found would seem to indicate a practice of just adding a layer or two when the junk ring could not be tightened furthe
20:40 katsmeow-afk and to (wholly or in part) renew only if unavoidable. A seven day period seems more likely as a tightening interval than as the total life of a set of packings. Findings of Middelkoop [14] and repair notes [2] confirm that packing maintenance was a major activity.
20:42 katsmeow-afk i should point out, rue, that a vertical pistons life was much longer than horizontal piston movement
20:42 katsmeow-afk simply because there was no weight on the rinks
20:42 katsmeow-afk rings
20:42 katsmeow-afk cylinders lasted forever too
20:43 rue_house yea
20:43 rue_house they look cool too
20:43 rue_house what rpm do you think I could use for a 4kw engine
20:43 katsmeow-afk Once good alignment has been achieved by carefully positioning the initial narrow coils of hemp behind the segmented ring, the remainder of the task would be easier. Another effect of these segments would be to prevent the packing material from working down into the gap.
20:44 katsmeow-afk depends on the piston size, you need to make hp, not rpm, gears or pulleys can make up the rpm for you
20:44 rue_house your fibergalss seal worked great on the submarine test
20:44 katsmeow-afk <curtsey>
20:44 katsmeow-afk i didn't know you actually built it
20:44 rue_house well, 3600 rpm would be most easy to use, 1800 would be ok
20:45 rue_house I have working peices in a bucket
20:45 katsmeow-afk 1800 would be a very high end rpm
20:45 rue_house (for the sub)
20:45 rue_house yea
20:45 rue_house think I could pull off a 3600rpm steam engine?
20:45 rue_house small flywheel ;)
20:45 katsmeow-afk the lighter the moving parts are, the faster it will spin
20:46 rue_house now apply to a verticle engine
20:46 katsmeow-afk yeas, but you'll need very high pressure steam
20:46 rue_house use a condensor to create exhaust vacuum
20:46 rue_house double acting cylinders
20:46 katsmeow-afk there weere 200hp steam engines at ran on 160C steam and 50psi, but at only 10 rpm
20:46 rue_house :)
20:47 rue_house yea
20:47 rue_house I think 3600 would be a feat and a half
20:47 katsmeow-afk Mercedes, a few yrs ago, made a steam engine for a car that reved 6000rpm, iirc, but it was like 1000psi
20:48 katsmeow-afk if the steam hasto chase the piston down the cylinder, you are losing efficency just making pressure
20:48 rue_house its only 4kw, I suspect small throw
20:48 rue_house it can have large ports
20:49 rue_house ok, say, 100psi, 4000kw, 3600rpm
20:49 rue_house where does that put the rest of it...
20:49 katsmeow-afk holy shit, 4000kw?!?
20:50 rue_house yea
20:50 rue_house no
20:50 rue_house sorry
20:50 rue_house k slipped in there
20:50 katsmeow-afk <blink>
20:50 rue_house haha
20:50 rue_house 4kw
20:50 rue_house not trying to power the god damn town
20:50 katsmeow-afk ok
20:50 rue_house :)
20:50 katsmeow-afk heh
20:51 rue_house 5.364 hp
20:51 katsmeow-afk here's some working numbers you can scale:
20:51 katsmeow-afk stroke rate 10 per minute rated, but usually 5-6 per minute.
20:51 katsmeow-afk power c.220 kW (300 hp), later up to 350 kW (500 hp).
20:51 katsmeow-afk boilers:
20:51 katsmeow-afk 1849 six Cornish, rated at 2.4 bar (34 psi),
20:51 rue_house 7.83 foot-lbs
20:51 katsmeow-afk 500hp @ 35psi
20:52 rue_house 100psi, 4kw, 3600rpm -> 7.83 foot-lbs
20:52 katsmeow-afk remember with steam you don't start getting power back until the water is boiling, all the energy you put into the water up till 250C is unuseable
20:53 rue_house say, 4 cylinder
20:53 katsmeow-afk yeas, but at 3600 rpm your steam hasto be moving so fast, it's rather mindblowing
20:53 katsmeow-afk plus the steam valves etc
20:54 katsmeow-afk get an olde car engine, toy with it
20:54 rue_house 100psi, 4kw, 3600rpm 4cyl -> 7.83 foot-lbs, crank throw of _____ inches, piston of ____ in^2
20:55 rue_house in a 4 cyl, you woul have 2 pistons acting at the same time usually yes? or would they be staggered 90 degrees?
20:55 katsmeow-afk The rated pressure of 2,4 bar working on a piston area 3,6 m2 could lift about 860 kN, i.e. statically raise a weight of about 86 t if no vacuum present (startup conditions). <<== 86tons on the piston rod to the crank throw
20:55 rue_house that would be 2 acting at once
20:55 katsmeow-afk stager 90
20:55 katsmeow-afk you more need one working at all times than 2 working at once
20:56 katsmeow-afk with one working at all times, it will self-start rotating
20:56 rue_house so each piston is adding 3.92 foot-lbs of towque
20:56 rue_house but thats averaged
20:56 rue_house if you have double acting cylinders tho
20:56 rue_house I might think you offset te crank 45
20:57 katsmeow-afk figure the center 50% of the crank throw/revolution is power per piston on 4 double-acting pistons 90o apart
20:57 katsmeow-afk piston arrangement : +
20:57 katsmeow-afk or, make them inline and offset a throw 90 on the crank
20:57 rue_house but then you have 2 cylinders working togethor all the time
20:58 katsmeow-afk no
20:58 rue_house if they are double acting...
20:58 rue_house this one pushing down -> + <- that one pulling up
20:58 katsmeow-afk oh,, i am thinking of something else
20:58 katsmeow-afk yeas
20:58 rue_house so you would half the angle...
20:59 katsmeow-afk okk , 90 offset and 45 offset
20:59 katsmeow-afk er
20:59 rue_house 0degrees, 45 degrees, 90 degrees....
20:59 rue_house uh
21:00 rue_house 135 degrees?
21:00 rue_house k
21:00 katsmeow-afk it's amind game, it's like moding a 4-cyl mind to work like a 8cly
21:00 rue_house I think I'd hav to draw that
21:01 rue_house yea, 0, 45, 90, 135
21:01 rue_house dont know how the hell you balance that crank, but ok
21:01 rue_house "carefully"
21:01 katsmeow-afk something wrong with that
21:01 rue_house all the power strokes are happening on the same 180 degree side
21:02 katsmeow-afk no, the double-acting will *pull* on the other 180
21:02 katsmeow-afk the gotcha is the pull is always less than the push
21:02 rue_house but its all happening on the same side
21:02 rue_house but the cylinder are push-push
21:03 rue_house push down, push up
21:03 rue_house with pushing and pulling at the same time
21:03 katsmeow-afk make a 2-cyl that runs evenly, then bolt it to another 2 that runs evenly
21:03 rue_house opposite piston sides
21:03 katsmeow-afk i know
21:03 rue_house ok, 2 fylinder
21:03 rue_house it would be 90 degrees, right?
21:04 rue_house by that, 45 degrees is right for a 4 cyl...
21:04 katsmeow-afk on the same crank throw you can put two double-acting cyl if the cyl are 90o to each other, and get 4 power pulse per revolution
21:04 rue_house yup
21:05 rue_house ok, I still dont know how to go from foot-lbs torque to force/cylinder
21:05 katsmeow-afk to get another 4 pulses, you offset anotehr crank throw 45o
21:05 rue_house but I can start to see a torque waveform that dosn't dip to 0 anywhere
21:05 katsmeow-afk ft-lbs is crank throw x pressure on the piston
21:06 rue_house but that at 90 degrees
21:06 katsmeow-afk yeas, steam engines are like the series wound diesel engine :-)
21:06 rue_house heh
21:06 katsmeow-afk you can get full engine torque at no rpm
21:07 katsmeow-afk take a diesel torque curve and turn it around so the peak is at low rpm
21:07 rue_house 4 cranks
21:07 rue_house 0, 45, 90, and 135.
21:07 katsmeow-afk 4 cranks will get pricey
21:07 rue_house the 90 is pressure * crank len
21:08 katsmeow-afk oh, 4 throws?
21:08 rue_house the 0 is useless
21:08 rue_house the 45 and 135 are at (I think) .707 presure * crank len
21:08 katsmeow-afk no more pressure and hp than you need, i'd use a car crank and two pistons per throw
21:09 rue_house what are the offsets on an inline car engine?
21:09 rue_house I thought they use 0 and 90 cause they have one cylinder compession stroke while its opposite is power
21:10 katsmeow-afk and for an inline they cannot possibly use but one cyl per throw
21:11 rue_house so I think that a car engine crank would be out for doign a doubleacting steam
21:11 katsmeow-afk car engines are power on every other down stroke, with double-actng steam you get 4x the power per cyl: 2 power strokes per revolution
21:11 rue_house (ok it would work, I'm saying might not be completely ideal)
21:12 katsmeow-afk i think it would be ideal if you needed the power and that many throws, or found an arrangeent you could saw in half
21:13 katsmeow-afk i suspect if you got a crank from an opposed-4 car engine, and ran 2 steam cyl in 2 banks 90 apart, you'd be all set
21:13 rue_house or buck two cranks short that have plates you can bolt togethor at 45 offset
21:13 katsmeow-afk yeas
21:13 rue_house how many holes are in the end of a typical crank shaft?
21:13 katsmeow-afk holes?
21:13 rue_house 8?...
21:14 katsmeow-afk oh, for mounting the flywheel? 6 or more
21:14 rue_house dont engines usually have a flange on the end of the crank?
21:14 katsmeow-afk some do, some have splines and a bolt-on flange
21:17 rue_house ok I get the force of the 3 cylinders acting at once is pressure *single-cylinder-area*2.414
21:18 rue_house 100psi, 4kw, 3600rpm 4cyl -> 7.83 foot-lbs, crank throw of _____ inches, piston of ____ in^2
21:18 rue_house 100psi
21:18 rue_house oh, I need a crank throw
21:19 rue_house 100psi and 7.83 foot-lbs
21:19 rue_house maybe a 3 inch crank?
21:19 rue_house would be...
21:19 katsmeow-afk car engine
21:19 rue_house I'm gonna play wiht this...
21:20 rue_house 7.83foot-lbs
21:20 katsmeow-afk 351/350 , iirc, was 3.5" throw
21:20 rue_house times 4
21:20 katsmeow-afk 289/260 was 3" throw, iirc
21:20 rue_house 31.32 lbs on a 3" crank
21:20 rue_house er
21:21 katsmeow-afk i think you won't like the high temperatures and high pressures needed to reach 3600 rpm
21:21 rue_house it can be done at 100psi
21:21 rue_house by numbers anyhow
21:21 katsmeow-afk you'll have much higher pistons sliding in the cylinders
21:21 rue_house I'm trying to work out the piston size
21:21 katsmeow-afk ok
21:23 katsmeow-afk 3" crank trow is 6" piston stroke, i do not see how you will get a mere 100psi to fill 1/2 inch of the cyl at start of power stroke, when you haveto do it 60x per second to hit 3600 rpm
21:23 rue_house 100psi, 3 inch crank, 7.83foot-lbs torque, 31.32lbs/2.414,
21:23 rue_house maybe its a 1" piston :)
21:23 rue_house wait, lets take it from the steam point of view
21:24 rue_house 4kw, 100psi, how many gpm?
21:26 katsmeow-afk it's been a long day, my brian is shutitng off early
21:26 katsmeow-afk i can hardly say Haarlemmermeer
21:26 rue_house You have: 4kW
21:26 rue_house You want: hp
21:26 rue_house * 5.3640884
21:28 rue_house zippo:/etc/modprobe.d# calc "(1714*5.364)/100"
21:28 rue_house (1714*5.364)/100 -->> 91.938960
21:28 rue_house 92 gpm
21:29 rue_house 12.3 feet^3/min
21:30 rue_house dosn't sound tooo bad
21:33 Tom_itx steam turbine
21:33 rue_house I think at 100psi water has to be at 200c
21:34 rue_house 330F
21:34 Tom_itx i got burned good once with a pressure cooker
21:34 rue_house 166c, np for my boiler
21:35 rue_house putting in a superheater coil would be easy
21:36 rue_house hmm
21:36 rue_house have the boiler do electricity while its heating
21:36 Tom_itx you do any more work on your cnc?
21:37 rue_house keep it working hard!
21:37 rue_house no, I was home ill allmost all day
21:37 katsmeow-afk http://www.youtube.com/playlist?list=PL781E43FD5E400845
21:40 katsmeow-afk http://www.youtube.com/watch?v=CNgpPcyvrXU&list=PL781E43FD5E400845&index=8
21:42 rue_house I'm working on getting the vaccuum test motor togethor
21:42 rue_house I worked out what I'm gonna assemble
21:42 rue_house how to drive the shaft with that pulley was the hard part
21:42 rue_house I dont have stuff to just key it
21:42 Tom_itx you got a file don't you?
21:43 rue_house and the driv shaft?
21:43 Tom_itx grinder
21:43 Tom_itx cutoff wheel
21:43 Tom_itx or such
21:43 katsmeow-afk dremel
21:44 rue_house my idea is to jab a pin thru the ahaft and use a "slotted plate" to lock it ot the pulley
21:45 Tom_itx another idea..
21:45 Tom_itx put the pulley on the shaft
21:45 katsmeow-afk you can always put the pulley on the shaft, then drill a hole where the square key goes, and insert a roll pin
21:45 Tom_itx drill a hole twixed the two and tap it
21:45 katsmeow-afk lol
21:45 Tom_itx then insert a bolt in the end
21:45 katsmeow-afk that too
21:45 katsmeow-afk a looooooong grub screw
21:45 Tom_itx or roll pin
21:46 rue_house its in the "middle" of the shaft
21:46 rue_house bearing on either end
21:46 Tom_itx better suited for a grinder wheel
21:46 rue_house which, come to thik of it, is a stupid idea
21:46 rue_house how would one change hte belt
21:46 rue_house hmm
21:46 Tom_itx i got one that way
21:46 e_house reth
21:47 Tom_itx it's a pita but doesn't happen often enough to bother me
21:47 rue_house I have enough things that are hard ot maintain, dont need more
21:47 katsmeow-afk so put the pullet on the shaft, use a thin zip disc to cut a slice thru the shaft and into the pulley, then hammer in a piece of 14 guage sheet
21:47 katsmeow-afk i hate drilling holes thru the middle of shafts, seem then break after that
21:48 katsmeow-afk you can get tapered collets that bolt into the pulley, and seriously clamp the crap out of the shaft
21:48 katsmeow-afk good as a keyway
21:51 rue_house I was thinking that cause its a 15mm hole and I want a 1/2" shaft, but I dont have any 1/2" bearings
21:51 rue_house but I do have 15mm bearings
21:51 rue_house and I can turn down the end for the 1/2" I need
21:51 tsmeow-afk looks tired and conf
21:51 rue_house ======--
21:51 rue_house ^ 15mm ^ 1/2"
21:52 rue_house the 15mm would fit the pulley perfectly, and the two bearings Ihave
21:52 rue_house the 1/2 is to go to the output pulley
21:52 tsmeow-afk
21:58 tsmeow-afk is in slomo all daytoday and getting sllloo oo o o o w
22:08 katsmeow-afk cats are liquids : http://imgur.com/gallery/j9vAH
22:12 rue_house haha
22:15 rue_house the roommate is playing a multi-player online game, I heard him say "you guys go over there" so I shouted "its a scuicide mission!" a few times
22:25 katsmeow-afk http://imgur.com/gallery/7HoWN8W
22:26 rue_house hahaha
22:57 katsmeow-afk http://31.media.tumblr.com/8ce5ba11bdc0121b23130fa1e4cc2824/tumblr_mv35mtu2J81sh2ypgo1_250.gif
23:03 rue_house pretty good
23:05 katsmeow-afk http://www.youtube.com/watch?v=R6pPwP3s7s4