Newton's Laws.

We finished up our water rocket unit last week and it ended with a bang!  Built about 70 rockets.  The test launch a couple of weeks ago had a lot of failures- but thats why it was a test launch.  We had several rockets over 200 feet, and one even broke 300 feet!

Forgot to bring my camera for the first class, and had one embed itself about 4 inches into the ground. Lotsa fun watching the students scatter!

These are all from the other 2 classes.  Took dozens of pics, most of them were only of a stream of water because I couldn't time it right.

Hard to see, this one has a funnel for a nose cone.  It flew pretty well, but he had a little too much weight so it didn't go very high.  On the bright side-  when it came down the funnel stuck into the ground and the bottle broke off and bounced away. 



This one collapsed the launcher...  Are you sensing the duct tape theme!?



(students commence scattering...)   Not really.  Didn't have any close calls this time, although in the past I thought I was going to have to buy the resource officer a new windshield for his cop car.






And my all time favorite:



 Love this picture!  Sooo many things going on here.  I'll be using this one a lot in the future-  all 3 of Newtons's laws are going on there.

Here's what happened.  The rocket's nose cone was made out of flimsy butcher style paper.  We normally layer them so they are pretty strong- but this student layered it and the stretched it out.  It was really floppy.  Then he added a cup or two of gravel inside the very tip of the cone to move the Center of Gravity up.  When the rocket went off, the nose cone collapsed and the bottle went PAST the tip and cracked itself like a whip!

If you look close, you can see the tip of the nose cone STILL GOING in the right direction!!! (part of Newtons first law-  objects in motion will stay in motion in a straight line)

You will also notice the gravel spraying out of the nose cone, and just for fun, try following the path of the water.

Anyways, got the rockets launched in the nick of time-  its starting to get cold out.  Already started on the Lego Robotics and the rest of our activities we can do in the relative warmth (not really possible at our school because we're "trying to save money") of my classroom.

Onward and upward!

Cookie Dough and Lego Robots.

Well, the cookie dough fundraiser is almost over.  I've been keeping track of my students sales and if they are about average for the rest of the school it looks like I'll be getting a nice bit of money to help update some stuff in the shop.  I have a list of things I'd like to update- and if I were to add everything up I bet there's over $50,000 worth of crap on my wish list.  Ain't gonna get anywhere near that much, but its fun to dream.

In the mean time, one of the top items on my list is new Lego robots.  I've got 12 extremely well used Lego NXT's.  Pulled them out this morning to use in class and two, yes TWO of the 12 screens worked.  Not a big deal, we can work without the screens- just means more headache for everyone involved, and its a common problem with a fairly easy fix.  So I spent my prep, lunch, and a few minutes here and there while students were working trying to get them fixed.




Managed to get all but 3 of them working, and it looks like those three are finally toast.  Might try and find some new resistors and give that a try, but for now they're just going to have to live with it.

Lego came out with a new version- EV3- last year.  I really only need the "brains" and maybe a couple of the new sensors, but by the time you buy the parts individually you're already almost at the price of the complete kit.  Not that I need all the extra legos- we've got boxes and boxes left over from past FLL tournaments and the 12 kits we already have.

The kicker-  the district won't let me surplus the ones I currently have and re-invest the money in my shop.  So, they'll probably end up in some closet somewhere for the next 20 years, and some teacher down the road will toss 'em in the dumpster (along with the table saw and disk sander I "surplussed" a couple years ago).  Great plan guys.  Guess I just have to hope I got enough cookie dough money to upgrade the robots and get the new curriculum from Carnegie Mellon that goes with it.

Counting money tomorrow, so keep your fingers crossed.  Anyone wanna buy some cookie dough!?

Some LEATHER.

Been working on this case for my wife's Ipad in hopes that the next time my boys drop it, I wont have to replace the digitizer... (you may have read about the replacement process a few posts ago).

I had done some 'figurin a year or so ago.  Just think, if I'da built it then I wouldn't have had to replace the screen!  Laid it out and started cutting.





Tried something new- molding the leather by soaking it and keeping it formed to the shape I wanted until it dried out. Had to make an Ipad "blank" to hold the shape but it seems to have worked pretty well!  Also the first time I've ever used a stitching awl.  Pretty sad considering I teach leather working in one of my classes...





All molded and ready for some stain / super sheen.



Viola.  I used Range Tan for the stain and whatever Tandy sells as Super Sheen- Superflow something or other...  *LOVE* how the color turned out, kind of has a distressed look.







Can you see the one thing I forgot to do?!!?





Yup, its missing the hole for the charger.  Oh well... Don't think it will be to hard to pull a few stitches out and cut a hole there.



Might still add a handle and make a few changes but she's going to use it for a while and we'll see how it works.  Almost makes me want to give up the Stainless Steel one I made for mine!  The leather sure is lighter!

The dryer broke.

So I have a couple of days off, and think maybe I can catch up on a few things around the house. Morning started off great, then after lunch the dryer suddenly sounds like it sucked up one of the cats and is slowly ripping its fur off.

Broke.



Nothing serious though, the pulley on the belt tensioner finally wore through and split in half. The belt was just running on the rod and rubbing on part of the pulley making a heck of a racket.





Called around, no one local had one in stock so it would have been Monday before I could fix it AND the pulley would've cost $24!

Hey, I've got a 3D printer!!! Took about 15 minutes to draw it up and about an hour to print.







Installed with the belt not routed quite right.





Well, its in and it's drying. We'll see how long it last! Saved myself about $23 bucks AND I don't have to wait 4 more days for the parts to show up, so I can catch the laundry up!

Student Torture Chamber.

I picked a blast cabinet from Harbor Freight for school. It came in an really teeny little box labeled "some assembly required". After "some" assembly...


Students kept asking me what it was- so kept telling them it was a torture chamber for the obnoxious kids.  They didn't seem to believe me but everyone wanted to climb in anyways!? 

It was almost ready to test. My shop space is extremely limited so one of my goals this year is to make a bunch of the tools mobile. I ALSO picked up a bunch of casters at Harbor Freight.



This is going to be as painless as possible, so quality may be a bit on the low side but it should be totally functional. Cut some bits of metal out and started welding.



Aint purty, but it fits! Yes, I just zapped the casters on there instead of drilling / bolting.  Time is not a luxury I have...



I'll put a board in there and even get an extra shelf out of the deal. Sits level enough and rolls like a dream. All 4 casters lock, so when its time to use it I'm hoping parking it against a wall and locking the wheels will hold it in place.

The plan here is to have my welding students use this instead of the wire wheel for cleaning slag off. I don't have a good spot for them to be using grinders without spraying crap aaaalllllllllll over the shop.

One tool down, I'll do the parts washer next, then I still want to do the pedestal grinder, bandsaw, and drum sander.  If I get ambitious a few of my tables might end up with wheels too so I can move them around to make more space for working on mowers and such.

Now if I could just remember who built the home made Sand Blaster Vortex thingy out of a traffic cone.  Shop Teacher Bob, was that you?  Can't seem to find it anywhere and I have a feeling I'm going to need the reclamation feature for my sand blaster... 

Dan's Chariot #8 - Almost ready for a Maiden Voyage!

Man, this artsy fartsy crap sure tears up the time... Made some patterns for the leg pan sides.



Traced 'em on, cut 'em out, and made some edges. Really getting to love the edge forming machine- Being able to roll hems onto curves is great.



It'll sit something like this.



Made the other side too, and here it is sorta sitting in place.



Still need to put a hole in them for bungee cord attachment and I'll do some "racing stripes" like I did on the fenders.

Leg tie down hole and some decorations / stiffener added to the side pieces.



Think it blends with the fender pretty well. Hope I got the lines straight so everything matches!

A trip to the store for longer rivets, and lotsa holes later, its "done".



Going to sit something like this. I like it!



Drilled a few more holes and bolted it down.



Also picked up a few of these bushings at the hardware store and a bunch of nyloc nuts. Re-installed all of the seat belt hangers like this.



Put the seat, axle, wheels, and fenders back on to get an idea of how its shaping up.







I give it 2 thumbs up!



Obviously, it's a little short for me...

The fenders are just sitting there loose. Still trying to decide on the best way to extend them back just a bit more to be totally safe. Have an idea just having a hard time finding the material I want to make it out of. Soon as I get the new axle threaded for the nuts, I'm going to hook it up to a bike and see how it pulls. Maybe strap 3 or 4 50 lb bags of flour to it and see if I can break anything.

Getting closer! We even get a couple days off next week so hopefully more to follow soon. 

First Lego League 2013- Natures Fury! (NOT furry)

So Lego League is underway again.  We've got a decent mix of students this year and for the first time EVER, I have helpers!  The local community center has offered help both financially and with volunteers, and I've got a couple of Walmart employees that come in to do service and help earn me some extra money!  Hoping it'll be a good year.  The table looks awesome, but there are some really difficult missions. 

Really hoping that with the extra money / help this year, along with our school fundraiser, I'll be able to get a few sets of the new Lego Mindstorms robot- the EV3.  Speaking of fundraising... Anyone wanna buy some cookie dough?!

If wishes were fishes...

Something new: How to repair a cracked Ipad!

A couple of months ago my son managed to shatter the screen of my wife's Ipad.  Ouch.  It still worked but as we continued to use it shards of glass would fall out.  Not cool.  Got to checking and it's rather expensive to have someone fix it for you.  The glass, on the other hand, is pretty cheap!  Hey, I can fix anything, right?!

Did some research, bought some parts, and here's what I came up with.

So here's the kit and the broken Ipad. It came with the glass (digitizer), adhesive, and a pack of tools. Tools actually are pretty solid and came in handy, although I did almost all of the removal work with a putty knife.



Got the whole kit and caboodle from Amazon for $32.00 shipped. Here's the seller: http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1

This kit did NOT come with the plastic rim piece or the foam gasket, and I would have used them if it did. I managed to re-use the plastic rim piece even though it broke while taking it out. I think with some practice you could leave the plastic in place and just pop the glass out, but I'm hoping I don't have to find that out.

New digitizer.



Read through the destructions, and watched this vid a time or two...



Bit by bit, working the glass up with the blow dryer. The heat definitely makes a huge difference. The directions said several times to WEAR SAFETY GLASSES, and I'm glad I did- several times bits of glass shattered and shot me in the face.







Woot!



Removed the 4 screws and tipped up the screen.



If you look close at the bottom left hand corner, you can see the cables that need to be unplugged. Watch the video closely, it explains very well how to get them unhooked.

All out!



Time for cleanup. Spent most of my time getting bits of old adhesive and glass slivers out of the body. Took forever. Blew it out with air, picked some more, blew it out again, wiped the screen down, repeat about 50 times.

Re-assembly wasn't to bad. Hook up the digitizer, then hook up the screen.



Flip the screen over and screw it down. Apply adhesive to the back of the glass.



Did a test fit, and like Mr. Bob said, the goofy cable is pretty hard to get to lay down in it's little slot. Finally got it to fit right, so I peeled off the adhesive backs and stuck it down.

Sweet!



It works! Have it sitting under some weights overnight to make sure the sticky stuff sticks. We'll see how well it worked in the morning. $32 bucks and a couple hours of labor is a heck of a lot better than $250!!!