Time to ditch the affordaplane.... and design from scratch.

The more I look at the Affordaplane the more i'm upset with it.

First off, allow me to share a resource I've built for it:  http://theaffordaplaneresource.blogspot.com/

I've been collecting data for the airplane for a month now.  And I'm less and less happy with it.  I'm finding that the frame is weak, and heavy.  The plane more or less flies on horsepower versus finesse.  The plane builds up well outside of the part 103 rules, so I'd need to register it with the FAA and do all the experimental plane approval fun-ness I was hopping to avoid. 

To make a plane I'd be happy with out of an affordaplane, I'd need to completely remake the fuselage.  And landing gear.  I could make it come in under part 103 rules.  But at that point, I've essentially designed my own airplane.

OH... Well there's an idea.

Funny that. 

Now I'm developing something of an obsession over the Davis DA-2.  And... that means a pilots license.  I'm taking a discovery flight this weekend.  So we'll see how that goes.

Pretty isn't it?  120mph on 65hp.  And a solid 510lb useful load.

New tool time. An O-silly-scope. - A DSO Nano v1.5

I've got piles of voltmeters. Most of them are hilariously cheap, but when an accuracy of .1v is enough, the $3 voltmeter from harbor freight will do the job.

Voltmeters are grand, but they are very poor at showing you charge and discharge curves, and tell you absolutely jack about waveforms. That's where an oscilloscope comes in to play.

I have been lusting over the pocket oscilloscopes for a long time. And slowly the price has been coming down to the "why the heck not" level. About two weeks ago I decided that a DSO Nano had to be mine. $66 later, and four days of waiting, and it was.


Well there we go. You also get a little felt bag and a USB cable. But those are the big things you get in the package. No documentation at all!

They claim that it will accept 80v peak to peak. And that it has a 12bit DAC. Also they claim that it's got 1Msps.

I figure that means I can reliably look at 100khz signals.

On the subject of signals, it has this nice little test point on it. The test point is adjustable from 500hz to 2000hz.


Here's the DSO checking out it's own test signal. You can see it overshoot and the discharge curve. I wonder where that tail is coming from...

Now I wanted to try it with a really fun. The only thing I could think of that I had that would output a nice signal was my arduino. I loaded up the servo sweep sketch, and checked it out.

The servo signal is a pulse, every 20ms, that's between 1 and 2ms wide. I made a video of it. http://www.youtube.com/watch?v=YlIW7AvBg0Q

I posted on the EEvblog forum, asking for ideas of how to test, and exercise it. http://www.eevblog.com/forum/index.php?topic=4546.0

So it looks like I am going to make a joule theif.

Battletech Starter Box Set

Battletech is one of my favorite ways to completely waste an afternoon.  In it's board game form at least. 

Years ago, I bought the second edition of the Battletech board game.  It came with a 30 page book, a few game peices, two d6, and two paper maps.  I've destroyed, and later lost the box.  The mech models were a goner early on in it's history.

I was out this weekend, and wandered into a gaming store... and while I knew the battletech game was still out there.  I didn't know it was actually at retail again.  (this is it's third time through, FASA at first, then wizkids, and now Topps of all people!?)

The first thing that struck me was how heavy the box was.  It had serious weight.  I was actaully left wondering if it came with metal models in it.  It drove me a little crazy as I didn't have time to unbox the game for almost three days after I bought it.

And here's what I got once I opened the box.  The box top fits really tightly to the bottom.  I suppose you can expect this of a collector card company.  I think Topps wants this to be collectible, and at every turn my $55 seems worth it.

The came is notoriously complex.  It has lookup tables, and hit locations, and all sorts of things You need to resolve to finish a turn.  In the edition I had before, you had one book with everything in it except record sheets.  Topps saw fit to give you a cheat sheet, a quick start guide, a full rulebook, a map of the inner sphere, a nice book of record sheets, and a few things I'm obviously forgetting now. 

That bag of models seems a bit big.  And the two little boxes there are labeled thor and loki.  Last time I opened a basic battletech set there weren't any clan mechs.  This made me smile a bit. 

Seriously, it came with lots of documentation.  The record sheets include battle armor, some vehicles, and sheets for all the mechs that are included in the game.  Infantry, vehicles, were just hinted at in the original box set.  Here you get the rules to use them!  And the sheets to play them.

The original battletech game came with two folded sheets of paper as the maps. That's paper, but it's 1/8" thick cardboard.  You dont' see boards like this when you buy monopoly.  I'm seriously impressed.  This is where most of the weight of the box set came from.  And I'm quite happy for that.

That's a lot of mechs.  The two clan mechs are "premium" and need assembly. 

How many of them can you name?  it's definitely enough.  And they range from light to assault.  And all things in between.

I am quite happy with my purchase.  Now I just need to scrounge up some people and time to play with. 

Blowing Mini-Velo Tubes. Mercier Nano goes flat.

As will become evident.  I like two wheeled things.  I have a few to many bikes in my collection...

My most recent addition is a Mercier Nano from bikesdirect.  I've loved the look of mini velo's ever since I discovered they existed.  Something about the little wheels seems cute, and different to me.

 Not a bad looking bike.  It's a bit heavy though.  It's something like 26lbs.  (I'll get the full specs later)

So the first time I went for an actual ride on the bike, disaster struck..   I got all of 800' before I felt the "thump thump thump" of a flat tire.  Given the unique size of the wheels on the bike, it was a week before I had a new tube in my hands to fix the problem.

It turns out that the tube either wiggled past the rim strip, or just pushed through the rim strip and tore through a spoke hole.  I replaced the stock rubber rims strips with adhesive cotton ones from performance.  And I patched the stock tube. 

And then I got busy.  It wasn't until last week that I took the bike for a real ride.  I say "real" in that it was more than a couple hundred yards, but it was only 5 miles.  The ride was one of my usual middle of the night rides.  The weather was nice.  There really was no traffic to speak of.

Riding a mini velo is really no different from riding a normal bike.  It seems a bit less stable when riding no handed.  My particular bike has wider tires than I'm used to.  (I usually ride 23's, the bike has 32mm tires on it) 

The gearing is to short with the size of wheels it has.  I spent most of the ride in 14-16th gears.  And due to the long head tube, the water bottle is WAAAAY down there.

I'm not going to be selling this bike anytime soon.  I like it.  I expect it will become my new rack-beater bike.

Specs, as per bikesdirect:

Frame	Butted CroMoly Steel, features bottle cage mounts, rear rack mounts and replaceable rear derailleur hanger, 130mm rear spacing (standard road)
Fork	CroMoly Steel Aero StraightBlade with 1 inch steerer tube
Derailleurs	Shimano Sora RD-3400GS rear, SHIMANO FD-2303 DOWN PULL front
Shifters	Shimano SLR400F 16-SP
Brakes/Levers	C. STAR AS2.4D ALLOY SILVER Aluminum/ Aluminum ALLOY SILVER LEVER W/BLACK RUBBER cover
Hubs	ALLOY SILVER W/QR, Forged Aluminum shell
Rims	20"x1.5x32H JALCO DRX4000 DOUBLE WALL, ALLOY SILVER These accept standard 20" BMX size tires
Crank/BB	LSC 42T/52T, 170MM Aluminum arms SILVER / Cartridge SQ taper
Cassette/Chain	SUNRACE CSR8, 12-25T-8 speed Cassette (SATIN) / KMC Z-51 130mm rear spacing (standard road)
Saddle	Velo Ergo-Road (turbo style with comfort channel)
Seatpost/Stem	29.2mm x 300mm ALLOY SILVER Aluminum seatpost and Quill Stem EXT:90MMxLENGTH 200MMx0 DEGREES, ALLOY SILVER
Handlebars/Headset	Road Drop W:400MM ALLOY SILVER NOTE: Bars are road-drop only, NOT bullhorn / Contact-sealed, Cage Ball Bearing
Pedals	Flat pedals (free bonus, as shown)
Tires	20x1.5 BLACK Kenda Kwest K-193, Presta valve These are standard 20" BMX size tires (customers say they can use up to 1.75" BMX slicks but clearance is tight and fitment is not guaranteed)
Color	Black or Orange
Sizes	SM/M or M/L Geometry Chart (sized center of bb to top of seatpost clamp collar - just like most major brands like trek and fuji)

Shoes. Specially the cheap french kind. Feiyue Sneakers

The puns that could come of this are infinite.  So lets try to get this blog going on the right foot.

I own a lot of shoes.  My shoe pile rivals that of many fashion conscious women.  My excuse is that they all have real purposes. 

There's something like 12 pair of shoes there.   There's definitely some redundancy there. 

I suppose I'll post about all of them at some point... and we'll see if you think any of them need to be trashed.  More to the point, I got a new pair of shoes..  I feel like gushing about them a little bit.

For day to day wear, I like as little shoe as I can get.  I can't stand being barefoot, but I like to feel what i'm stepping on.   That combination means I usually like the cheapest shoes I can find.  The sort of shoes with flimsy soles, and sticky rubber on the bottom. 

http://www.feiyue-shoes.com/pages_en/collections_show.cfm?id=b9733f4a-ccd7-8fae-9d26388c2785ce03

They don't look like much; because they really aren't.  They're cheap.  There's no padding. 
They're just plain canvas tops. What makes them special is the insole, and sole.  The soles are very, very sticky. 

When I first got them, they smelled strongly of curing rubber.  I suspect this is the norm for these, and it would explain why the rubber was bordering on tacky.  I've been wearing them for a week now, and the smell has disapated, and now they're just sticky.

I feel like I could walk up walls wearing these things.

My cheap shoe habit also means I go through shoes pretty quickly.  This pair was about $20.  (I can't be entirely sure, someone else bought them for me, yey presents!)  So far, I'd buy another pair.