Categories
Martial Arts

Leg Bar

So normally when I think of leg locks I either am thinking of an Achilles lock or an ankle lock. Last Wednesday’s class was a little weird at the end. One of the brown belts showed the 3-sided choke, and that lead to a round of “have you seen this one”. Well we started in an arm bars and Sensei showed a leg bar – which is just weird – you basically end up with your weight on your shoulders and your chin buried in your navel.

Sensei did not teach the move – just showed us (on me) twice. However I think this is what was happening. It felt like he stepped over my leg, hooked the ankle and sat back pretty much like you would setting an arm bar. Just like you need to be careful sitting into the technique with an arm bar so you don’t blow the elbow, Sensei was similarly carful to keep things loose enough while sitting into so  he did not blow my knee.  He could have easily torqued against my knee and blown it any time he wanted to, but the bar seems to be a pin pulling straight down the V formed by your thighs. The result is stacking the pinned person on their shoulders.

 

Categories
Koei-Kan Martial Arts

Learning a new choke

Wednesday I nearly didn’t train. It is not my regular night, I just went to the dojo since I needed to clear out the cobwebs. It turned out to be an amazing night. It was just sensei and three of us training – so lots of 1 on 1 training time.

One of the people there showed this cool choke I had not seen before.

You start working up a collar. In the picture you grab with the lower right hand and slide the left hand up the collar. Then bring the right hand up. This leads into a bunch of things. This choke is used if the person on top bobs their head down, which if they are posting to pin the person on ground is not too uncommon. The choke gets set when the person on bottom, without letting go, pops their top hand over the head. This crosses the arms setting up the scissor choke.

Sensei pointed out that it is fairly easy to counter the setup for this choke by just pressing into the shoulder. I drew the picture with the top person pinning with their forearm – but seisei showed the counter with the left hand of the top person pressing into the GH joint of the shoulder.

Categories
Photos and Events

Missing grad school

Just ran across a bunch of old photos from back in grad school. Not sure what I miss more about grad school – dumpster diving with my friends to get parts to build insane things, or having an advisor who’s response to “Hey, are those your students out there dumpster diving behind the physics building” was “Yes, get a camera”.

 

Categories
Koei-Kan

A typical night in the dojo

So on the way out the door I looked up from the water cooler and saw this – pretty much sums it up. The person in the picture is Sensei Robles, the plastic box is the first aid kit – which was out like the ibuprofen and aspirin, because it had been used.

A typical night in the dojo
A typical night in the dojo
Categories
Photos and Events

How you know when it is time to upgrade your phone….

How do you know when it is time to upgrade your cell phone? When you go to the computer history museum and find that your model phone is one of the exhibits. *cough* Guess I should upgrade more often than once ever five years.

In my defense – I said I would use the iPhone 1 one until it died and the thing just would not die no matter how badly I treated it. I did everything to that phone but accidentally slam it in a car door and it just took it.
Categories
Projects

Brutus’s Gecko schematics…

So I realized that I have exactly *one* copy of the circuit I am using for the Gecko drivers. Normally I live out of my engineering notebooks but in this case they were unavailable when I put this circuit together. I am posting the circuit here as I want a backup and I am about to overhaul the electronics for my mill to add a bunch of additional safety features.

Circuit for gecko motors driving the big mill
Circuit for gecko motors driving the big mill
Categories
Toolboxes

And the glue dries….

It seems I spend more time on this project waiting for glue to dry than on anything else.

Here you can see the tool well before I add the holders for the different pliers and wire cutters.

Need to permanently add the pliers tool well
Need to permanently add the pliers tool well

Despite a frustrating number of measurements and test fits I somehow still had the tools protruding higher than I would like. To drop all the tool heights by another 1/8 th of an inch I ended up cutting a hole through the support base and then gluing in side supports. Grrr.

And this is what going too heavy on the glue looks like
And this is what going too heavy on the glue looks like

I guess I went heavy on the glue here. Once it dries I am scraping the excess and adding more support pieces – so this first round of gluing was fairly fast and dirty.

Categories
Logic

The pearl merchant

Testing out another problem for my book. This is really just my trying to re-word a centuries old classic. So let me know if the wording is acceptable here:

On his twentieth year working for a pearl merchant Isaac was offered a reward. He was presented with three vases. He was told that each vase contains an equal number of pearls however the vases contain different types of pearls. One vase is labeled as containing white pearls, one vase is labeled as containing black pearls, and the remaining vase is labeled as contain an equal mixture of black and white pearls. The vases are opaque and have long throats the drawer has no way of seeing what the vases contain or the color of the pearl they have chosen until the pearl is removed from the vase.

The merchant tells Isaac that each vase is labeled inaccurately. The merchant suggests that they take turns drawing pearls from the vases in an effort to correctly re-label them.

As a reward for faithful service he tells Isaac that if he can identify how to correctly label each vase first – he can keep any pearls he has drawn. However if the merchant can correctly re-label the jars first Isaac has to return any pearls he has drawn.

The merchant offers Isaac the chance to draw first, should he accept?

Categories
Martial Arts

Going to the dojo is a bizarre experience

I think one of the weirdest parts of going to the dojo is that from the moment you step in the door you senses start winding up. When you first walk in the door it is just like walking in any room with some muffled noise coming from the next room. Then some time before getting both your shoes off you realize it is positively noisy.

The muted noise from the next room has become a bunch of distinct noises; a regular thump – thump – thump coming from someone working the heavy bag, the shuffle of sliding feet from practicing Kata, and the especially distinctive noises of people sparring. People moving, falling, dodging, and striking – they all make distinctive noises. From the moment you walk into your brain starts pulling the initial swirl of noise into its distinctive and components.

Meaningful training requires being able to put the rest of your life and the outside world aside while you train. It is difficult at first, but the longer you train the easier it is to put the rest of your life on a shelf while you train. Eventually when you walk into the dojo you just automatically start shifting gears and getting ready to train. Before you hit the mat training is all you are thinking about – at least on the good days.

Today it just hit me, this bizarre combination – just as my senses were revving up and the number of inputs my brain was starting to track was exploding – my overall clarity was increasing.I only had a moment where I could observe the whole process from the outside – but it hit me with almost physical force.

It is the kind of thing that makes me sad that so few people train in any kind of martial arts. It is an amazing experience.

Categories
Toolboxes

My grandfathers tool chest – right side test fit

Front view
Front view

So the test fit is a big load off. Everything seems to fit exactly as expected. Not looking forward to making all the little dividers and boxes for the left side of the tool chest.

Right side test fit
Right side test fit

Contents of the box as things stand now only have 22 things. I decided to not pack so much into the toolbox. It contains fewer tools but I can carry it farther. Right now the box contains:

1. Folding wood ruler

2. Zippo lighter

3. Razor knife

4. Back saw – crosscut

5. 12oz hammer

6. Impact hammer

7. Small lineman’s dike

8. Wire cutters

9. Needle nose pliers

10. Locking pliers

11. Two 1 inch chisels

12. 1/4 inch chisel

13. 6 inch pry bar

14. Try square

15. Speed square

16. Adjustable square

17. Coping saw

18. Hack saw

19. Panel saw – rip

20. Panel saw – crosscut

21. Metal tape measurer

22. Wrecking bar

There are a whole pile of other tools I still need to make holders for – but that is what is in the box so far. Now that I have the tool wells glued up I can check clearance and make the mounts for the lid mounted level.