#garfield Logs

Mar 28 2022

12:12 AM rue_mohr: ok I figured out where the new numbers go, now I just have to re-sum everyting
12:32 AM rue_bed2: I wonder if I built a life thats bigger than I am....
12:32 AM rue_bed2: if I were living on a space station, as a machine, wondering what I'd be doing if I were an organic on a planet
12:33 AM rue_bed2: I think I'd presume I'd be building a robot army to take over the universe
12:33 AM rue_bed2: a bit here, a bit there
12:33 AM rue_bed2: so rue?
12:33 AM rue_bed2: where is the army?
12:34 AM rue_bed2: there are like 7 printers on the deck I still need to strip down
04:50 AM Tom_L: morning
08:23 AM rue_bed2: up with the alarm again
07:12 PM rue_mohr: bakc
07:14 PM Tom_L: .
08:13 PM rue_mohr: ok, uh
08:13 PM rue_mohr: taxes, sprayers, invoices, clean deck
08:14 PM Tom_L: i thought taxes and sprayers were done
08:15 PM rue_mohr: no, all I worked out with the taxes was where to put the two nuimbers, I have to recalculate the whole thing
08:15 PM rue_mohr: and the sprayers need serial numbers and to be packed up
08:16 PM Tom_L: i should measure the sewer pipe so i can find some ends for it
08:17 PM rue_mohr: 4"
08:17 PM Tom_L: i think so
08:17 PM rue_mohr: or 3"
08:17 PM Tom_L: but there is some 3" also
08:17 PM Tom_L: i think this looked like 4
08:17 PM rue_mohr: do you want a chart to know what size it officially is?
08:18 PM rue_mohr: they aren't the trade size
08:18 PM Tom_L: i'll put a cleanout on one end and cap the other
08:18 PM Tom_L: naw, i've got a piece i plan to use
08:18 PM Tom_L: should be able to pick up ends pretty easy
08:19 PM rue_mohr: their less than 1lb
08:19 PM rue_mohr: }:]
08:19 PM Tom_L: i'm not as stout as i used to be
08:19 PM rue_mohr: heh
08:19 PM Tom_L: i found that out yesterday
08:19 PM Tom_L: trying to get some dead branches out of the tree
08:21 PM Tom_L: https://www.lowes.com/pd/PVC-4-in-dia-PVC-Cap-Fitting/3133139
08:21 PM Tom_L: https://www.lowes.com/pd/PVC-Hub-Adapter-Fitting/3133119
08:21 PM Tom_L: one of each
08:22 PM Tom_L: i thought i might have at least one of those but i didn't
08:23 PM Tom_L: i have one more box i can look in..
08:24 PM Tom_L: the plan is to glue/screw a couple paddles inside to disrupt the contents
08:43 PM Tom_L: so, large or small wheels?
08:43 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Tumbler/Tumbler_base1.jpg
08:43 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Tumbler/Tumbler_base2.jpg
08:44 PM Tom_L: i should send that scrap pile for you to melt too :)
08:45 PM rue_mohr: hah its ok
08:45 PM Tom_L: if i had a belt to wrap around the tube i could let the motor hang underneath it
08:45 PM rue_mohr: I have aluminum flowing out my ears
08:45 PM Tom_L: should be enough weight to turn maybe?
08:45 PM Tom_L: :)
08:45 PM rue_mohr: drive the wheels
08:45 PM rue_mohr: where is mine...
08:45 PM Tom_L: dunno if i can get them slow enough
08:45 PM rue_mohr: just beware the threads may lock up on you
08:45 PM Tom_L: if i did that i'd probably use the big ones
08:45 PM rue_mohr: I used a big wheel
08:46 PM rue_mohr: where did mine go
08:46 PM Tom_L: threads?
08:46 PM Tom_L: on the end cap?
08:46 PM rue_mohr: for the cap
08:46 PM rue_mohr: the sand gets in 'em
08:46 PM Tom_L: i know
08:46 PM rue_mohr: where did mine go?
08:47 PM Tom_L: i found that tube i didn't know i had
08:47 PM Tom_L: the other one is outside and i think 3"
08:48 PM Tom_L: didn't check cause i found that one
08:48 PM Tom_L: i could get a brass cap too
08:48 PM Tom_L: i put one of those on the sewer because the plastic stuck like you said
08:51 PM rue_mohr: I cant find it anywhere I need it for grinding kitty litter for the casting sand
08:51 PM rue_mohr: where the hell did my tumber go
08:52 PM Tom_L: buried
08:52 PM Tom_L: did you use steel balls to smash the kitty litter?
09:06 PM rue_mohr: under the sand blaster
09:07 PM Tom_itx: https://www.harborfreight.com/dual-drum-rotary-rock-tumbler-67632.html?utm_source=go&utm_medium=social&utm_campaign=shortener&cid=go_social
09:16 PM Tom_itx: they don't have the vibratumblers in stock
09:16 PM rue_mohr: 1 min
09:16 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1230268.jpg
09:16 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1230269.jpg
09:16 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1230270.jpg
09:16 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1230271.jpg
09:16 PM rue_mohr: so, the motor is missing, its a mid-sized dc motor that I loaned to antoher project
09:16 PM Tom_L: well i have the motor but that's about it
09:17 PM rue_mohr: it still needs work
09:19 PM rue_mohr: so yea, I think those wheels are great
09:19 PM rue_mohr: use all 4
09:19 PM rue_mohr: 2 on one shaft, 2 on the other
09:19 PM rue_mohr: drive with the smaller ones
09:19 PM rue_mohr: space 'em good to keep the drum in
09:19 PM Tom_L: oh, i've got buckets of both :)
09:20 PM Tom_L: most with the bearings
09:21 PM rue_mohr: yea, skip the bearings
10:03 PM Tom_L: i gotta evaluate storage room and decide if it's important enough
10:03 PM Tom_L: very limited on space
10:03 PM rue_mohr: thats a tiny tumber
10:03 PM Tom_L: i know
10:04 PM rue_mohr: I could send you one, but that would be silly
10:04 PM Tom_L: i should clean out crap i no longer will use
10:04 PM Tom_L: but that's a hard thing to do
10:04 PM rue_mohr: :S
10:04 PM Tom_L: you know about that?
10:04 PM rue_mohr: I should have stripped down an inkjet printer today
10:05 PM rue_mohr: the pressure to get stuff done has me too stressed out to work on anything
10:05 PM Tom_L: i'm not as energetic as i used to be
10:06 PM rue_mohr: me either
10:06 PM rue_mohr: I should have been welding up a steam engine when I got home
10:06 PM Tom_L: i like to take on small things i know i can finish
10:06 PM rue_mohr: I work on 500000 things at once, knowing I will finish large lumps of them at the same time
10:06 PM rue_mohr: its statistically impossable not to
10:07 PM Tom_L: my brain won't allow that anymore
10:07 PM rue_mohr: my brain isn't
10:07 PM Tom_L: i'm sure covid messed with it
10:07 PM rue_mohr: I spend lots of the day going "Oh! I'll do that!"
10:07 PM Tom_L: and muscles
10:07 PM rue_mohr: mmm I need a robot body
10:08 PM rue_mohr: so a few months ago doing a fire inpsection, we had to shut off a water supply fave
10:08 PM rue_mohr: valve
10:08 PM Tom_L: i can't tell if it's joint or muscle pain but my arms ache all the time anymore
10:08 PM rue_mohr: OS&Y valve
10:08 PM rue_mohr: it took two of us heaving as hard as we could on the handle to get it to shut off
10:08 PM Tom_L: rusted?
10:08 PM rue_mohr: in the process, I pulled a muscle in my hand,
10:09 PM rue_mohr: related to cupping my hand when its tipped back
10:09 PM Tom_L: yeah i know about that
10:09 PM rue_mohr: it keeps comming back up
10:09 PM rue_mohr: and when it trips it HURTS
10:10 PM rue_mohr: I still cant completely reproduce the pain-point
10:10 PM Tom_L: if i turn my arm the right way, i can't hold a coffee cup without it hurting
10:10 PM rue_mohr: but I'm getting annoyed as every time I think its ok, it comes back up again
10:10 PM rue_mohr: oof
10:10 PM Tom_L: was never like that before
10:10 PM rue_mohr: something with covid?
10:10 PM Tom_L: i'm sure of it
10:11 PM rue_mohr: it messes up nerves
10:11 PM Tom_L: i know i'm aging but this is different
10:11 PM rue_mohr: there is a nerve test thing, but thats probably a lot of $$$ down there
10:11 PM Tom_L: not much i can do so meh
10:16 PM Tom_L: is that like a gate valve?
10:17 PM rue_mohr: ...
10:18 PM rue_mohr: https://files.avkvalves.com/images150/2546redp_55297582-d9e6-48db-b97b-d7cd01e68449.jpg
10:19 PM rue_mohr: 2 of us with everything we could put into it to make the damn thing seal
10:19 PM rue_mohr: there is a wrench you can get for them, I better get one in the next year or I'm gonna really hurt myself
10:24 PM Tom_L: yeah
10:24 PM Tom_L: they probably don't get turned but once a year or so
10:26 PM rue_shop4: by me :/
10:27 PM rue_mohr: there have been a few times they would NOT seal
10:27 PM rue_mohr: part of testing the backflow valves
10:29 PM Tom_L: gate valves don't seal as well as ball valves
10:29 PM rue_mohr: heh, were talking 6" pipes :)
10:29 PM Tom_L: i know
10:33 PM rue_mohr: ok, I'll turn on the tv for ya
10:33 PM rue_mohr: all
10:33 PM * rue_mohr looks at the growing list
10:33 PM rue_mohr: so, I want 8hp on the test steam engine
10:33 PM rue_mohr: at 1800rpm
10:33 PM rue_mohr: I have two cylinders
10:34 PM rue_mohr: the crank I got is 25mm radius
10:34 PM rue_mohr: 8hp/1800rpm is 129kg on a 25mm crank
10:34 PM rue_mohr: I'm planning to run at 200psi
10:34 PM Tom_L: V or opposing?
10:35 PM Tom_L: or inline
10:35 PM rue_mohr: 90 degree offset on the crank
10:35 PM rue_mohr: the cylinders are double acting
10:35 PM rue_mohr: (its 180 on the crank, so I have to V the engine)
10:35 PM Tom_L: modified from what?
10:35 PM rue_mohr: motorcycle
10:35 PM Tom_L: or purpose made
10:35 PM Tom_L: ok
10:36 PM rue_mohr: I cant do that fancy machining, so I'll get premade stuff
10:36 PM rue_mohr: the crank, bearings, conn rods, and piston pins are all reused
10:36 PM Tom_L: will the rods be long enough for double acting?
10:37 PM rue_mohr: so, at 200psi, needing 129kg force, I need a piston with an area 9.17cm^2
10:37 PM rue_mohr: Tom_L, no, it'll have to be a double connector rod
10:37 PM rue_mohr: straight shaft out the cylinder, going to the orig piston pin
10:37 PM Tom_L: oh ok
10:38 PM rue_mohr: so, the piston diameter would be 3.42cm
10:38 PM rue_mohr: AREN'T THESE THINGS CRAZY!?
10:38 PM rue_mohr: thats my miniumum piston size
10:38 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine4.jpg
10:38 PM Tom_L: rod arrangement like that?
10:39 PM rue_mohr: yup
10:39 PM rue_mohr: wjem dod upi dp tjat
10:39 PM rue_mohr: ?
10:39 PM rue_mohr: when did you do that?
10:39 PM Tom_L: my grandfather made that for me as a kid
10:39 PM rue_mohr: nice!
10:39 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine2.jpg
10:39 PM Tom_L: i tried one :/
10:40 PM rue_mohr: looks like he had a method, how many did he make!
10:40 PM Tom_L: a bit rusty but it did run
10:40 PM Tom_L: One for me
10:40 PM rue_mohr: wow nice
10:40 PM rue_mohr: oilers and everything
10:40 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine5.jpg
10:40 PM rue_mohr: is that brazed?
10:40 PM Tom_L: he put alot of time in it
10:40 PM Tom_L: solder?
10:41 PM Tom_L: i'm not sure
10:41 PM rue_mohr: yours, the crank, brazed?
10:41 PM Tom_L: oh
10:41 PM Tom_L: yeah i think so
10:41 PM rue_mohr: thats pretty good to get something that small all aligned like that
10:41 PM Tom_L: that or silver solder
10:41 PM Tom_L: i think it was brazed
10:42 PM Tom_L: i wasn't very old then
10:42 PM rue_mohr: yea thats what I mean
10:42 PM rue_mohr: even just aligning the shaft ends in those blocks is a fight
10:43 PM rue_mohr: not siezed is it?
10:43 PM Tom_L: i dunno
10:43 PM Tom_L: it's up in the attic
10:43 PM Tom_L: i just got it down to take pics when you started talking about steam engines
10:43 PM rue_mohr: did he help you out on the design?
10:43 PM Tom_L: no
10:43 PM Tom_L: i looked his over though
10:43 PM rue_mohr: wow
10:44 PM rue_mohr: heh, is there a pulley on the backside of the flywheel on image 2 there?
10:44 PM Tom_L: probably
10:44 PM rue_mohr: heh
10:44 PM rue_mohr: string belt then for that :)
10:45 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine1.jpg
10:45 PM rue_mohr: watch the knot go 'round ;)
10:45 PM rue_mohr: spool valve?
10:45 PM rue_mohr: or sled?
10:45 PM Tom_L: i don't remember much about it now
10:46 PM Tom_L: i was surprised to find it in the box with the other one
10:46 PM rue_mohr: so, 8HP, 3.4cm diameter piston...
10:48 PM Tom_L: that's a small piston
10:48 PM rue_mohr: 8 hp
10:48 PM rue_mohr: _8_
10:48 PM rue_mohr: *blink*
10:48 PM Tom_L: you sure it's gonna be that efficient?
10:48 PM rue_mohr: the HP/cc on steam engines is crazy
10:48 PM rue_mohr: no
10:49 PM rue_mohr: so I'll make the piston larger
10:49 PM rue_mohr: 4cm?
10:49 PM Tom_L: dunno
10:49 PM Tom_L: but
10:49 PM Tom_L: if i can make one i'm sure you can
10:49 PM rue_mohr: ok, let me run the calcs in reverse
10:49 PM rue_mohr: lets say 4cm dia
10:50 PM rue_mohr: 4cm piston, 50mm stroke
10:50 PM rue_mohr: Area is : 12.566371
10:51 PM rue_mohr: 62.83cc
10:51 PM rue_mohr: times 2 cylinders
10:51 PM Tom_L: that's the same size as my boat engines were
10:51 PM Tom_L: 65
10:51 PM Tom_L: and they put out ~20hp
10:52 PM rue_mohr: well, I think I have an error
10:52 PM Tom_L: tuned pipe with nitro fuel
10:52 PM Tom_L: i still have an old cylinder from one i think
10:52 PM rue_mohr: see, with those calcs, I get 1.4x force peak
10:52 PM Tom_L: and a crank
10:53 PM Tom_L: they used a rotary valve
10:53 PM rue_mohr: so the torque is actually higher, but I dont want to work out the average right now
10:53 PM rue_mohr: a gas engine with a rotary valve?
10:53 PM Tom_L: 2 stroke
10:53 PM rue_mohr: yea
10:53 PM rue_mohr: at that hp/cc it would have to be
10:54 PM rue_mohr: so...
10:54 PM Tom_L: https://www.worthpoint.com/worthopedia/ops-65-boat-marine-model-engine-motor-407501688
10:55 PM * rue_mohr swirls his finger around on the note paper..
10:55 PM rue_mohr: want to build steam engines?
10:55 PM Tom_L: no
10:55 PM rue_mohr: ugh
10:55 PM rue_mohr: 1 rev is 4 strokes
10:56 PM rue_mohr: 251.32cc
10:56 PM rue_mohr: at 200psi
10:56 PM rue_mohr: oh, time
10:57 PM rue_mohr: 0.03333 sec/rev
10:58 PM Tom_L: ok i'm goin to sleep
10:58 PM Tom_L: you'd better eat
10:58 PM Tom_L: gnite :)
10:59 PM rue_mohr: machine might be done
10:59 PM rue_mohr: 7.5L/sec of steam
10:59 PM rue_mohr: at 200psi
10:59 PM rue_mohr: is 13.87hp
11:00 PM rue_mohr: which is ok, I bumped up the piston size
11:02 PM rue_mohr: it looks like I still have about 2hp un-accounted for tho
11:03 PM rue_mohr: I'm gonna assume its design mismatch
11:08 PM rue_mohr: the gas engine we did last year has siezed
11:08 PM rue_mohr: ;)
11:08 PM rue_mohr: see if I can work it loose