Tuesday, November 30, 2010

I forgot to title my previous post... Silly me

Well, as you can see from the lack of pics, I didn't get to test my snowmobile outside yet...
Instead, I made more modifications.

FIRSTLY: Originally, the treads were powered by a six tooth sprocket, which rotates at 80 rpm (powered by a 400 rpm motor) and that translates to 480 tread pieces a minute speed, and since each tread piece is about 12mm long, that translates to...
5760 mm a minute...
...
96mm/s
...
0.096m/s
...
...
...
0.345km/h...
It was so SLOW!!!

SECONDLY: The six tooth sprocket was quite low down, almost in line with two other sprockets on the tread (well, actually it was at about 160°), and so could slip if under enough pressure

THIRDLY: The sheer torque of the treads were well powerful enough (save for the slippage mentioned earlier) to overcome any obstacle it may encounter, unless it could not grip the surface (very unlikely in the snow)

Taking into account all of these things, I changed the shape of the tread slightly to changed the overall vehicle's performance.

First, I switched the 6 tooth sprocket for the only other available sprocket size, a 10 tooth, meaning it goes nearly twice the speed.

(Ok, ok, it still only goes at 0.575km/h, but still, better than before.)

Second, I changed the distance the front sprocket was away from the chassis (There's a diagram to explain it coming up in a second), bringing it much closer, and therefore reducing the the angle at the driving gear down to about 110°, giving the sprocket much more surface area on the tread, and so stopping the annoying slipping that had been occurring.

And finally, the third thing sort of doesn't matter, that the torque reduced, but it doesn't really matter as it still has well enough torque to overcome most obstacles (unless, as I said before, the grip fails).

I think it's about time for that diagram.


This may be a bit hard to understand, so let me explain it.

Firstly, the vehicle would be pointing to the Right

Secondly, the green shows how it used to be, with the smaller sprocket and further out front sprocket, and the red and orange being the current set up.
As you can see, the smaller green sprocket used to be it's driver, but it had to little grip on the tread, and so was replaced with the orange larger sprocket.

Thirdly, I must make a note that this is not accurate
It is only a diagram

However, if I can, I will be testing it tomorrow, and will take pics.


Ps. Just a heads up, my next big project is most likely to be a large model of the all terrain vehicle from the Halo™ series of games for the Xbox™ (which rocks), the Warthog, and may take a long time to build (aka. a month or two), which gives me a great opportunity to blag about it, day to day updates and all that.

Disputatio tibi posterius.

Monday, November 29, 2010

Oh dear... I haven't posted in a while.... Ah well

I woke up on Saturday [at 8:00am[dunno why so early]] and look out the window to see WHITE EVERYWHERE

I then see my dog sniffing the snow [he had no clue what it was] and circling the house, admiring the blanket of pure white that lay all around

I, however, took to this weather slightly differently

Depriving myself of any food for hours, I send a text to my friend saying "Lego snowmobile competition, GOGOGO"

Damn right.

I set down to design my first model.

Original snowmobile design, thick tank-like tread at the back, steering ski'like things at the front;
It fails miserably.

I start on a new project, three powered back wheels,normal steering at the front;
Again, this fails miserably

I try a more basic approach.~
I build a simple tank with two powered tread, skid steering, with pins galore sticking out of the treads.....
Success!


-ish....

It does... alright, but isn't geared down enough, and fails at much more than 10 degree slopes... but if it does manage to climb up a slope, it topples over backwards...
The treads are also a bit unstable and tend to jump around the sprockets...

I then go over to my friend's house, and see he already has his prototype done, same as my first, but with better done steering, and a smaller back tread...

He tests it out for the first time...
The back tread starts to spin...
and sinks down into the snow.

I lol'd.

He is currently now making more surface area for the back tread.

I however, continued to upgrade...

I make wheels hanging from the back with shock absorbers, to stop it toppling;
I make the motor to sprocket speed ratio even lower, going from 5:3 to 5:1;
I make the run around the sprockets much more smooth, as well as making the gripping surface area much larger;
And just for show, I make a second pair of treads without the pins galore for smoother surfaces than snow...
I'll be testing it tomorrow, to see how well it goes, Pics will follow soon, once I find the webcam...

ohh it's midnight... zero o'clock...
always found that sorta scary... as if time doesn't exist any mo... oh, wait, it's one minute past.

Never mind

Disputatio tibi posterius.

Saturday, November 13, 2010

He's Gone...

Frank has left, leaving me, Ogden, to continue this blog. To many found out about the blog, and he couldn't risk the infamy. He has a death sentence on twelve systems.

I hope I don't bore you....
I bore most people....
In my Boring ways...
Like limestone...

The new Harry Potter movie is coming out soon. However, I don't like typing about things that will pass in a while.
Aka. In three months, no-one will find this interesting because they've all seen the Harry Potter movie...

Oh My GOD blogger doesn't recognise movie as a word! It doesn't even recognise blogger as a word!

That's just sad.

And the squiggly red lines are really....

Wait...

It recognises SQUIGGLY as a word....

But not movie...


Seriously?

Oh dear, I appear to be posting about the post I am subsequently going to post...

Am I still sane?

Ah, who cares?
No-one.
That's who cares.
People just say to themselves, 'If I don't think about him, he doesn't exist.'

Well, you're... Actually I have no idea if you're right or wrong.

However, if they are right then I don't exist...

But by thinking that, I just proved I do exist...
(Cogito ergo sum)

Yay for logic!


...

What was I typing about?

Probably something that no-one will find important.

No-one ever finds anything I have to say important.

It's quite frustrating.

My dad says I spend too much time on the computer.
He's probably correct from his own point of view.
Because it's all a matter of opinion...

Well, to me it is...

Tuesday, November 9, 2010

About That...

There is something I should probably make clear to you by now... I am not your average sentient being.
I have been living on the head of a irish secondary school student for the past while, disguising myself as hair.

So...

This student found out about my blog.
He may end up telling the world about me. This cannot happen.

However;
Though I cannot risk anyone finding this page, only one person would be smart enough to find it.
This one person is more of a threat than all of the others combined.
He has made SIX foolproof plans to find this page.

I may not be back for a long while.

Goodbye for now,

Frank

Friday, November 5, 2010

Quarks

So yeah, I've started my technology project. Basically, I have to make a rough terrain toy vehicle controlled by the user via wires/infra red/bluetooth, and I'm probably using infra red.
It's easy enough to wire up, and it's wireless, with a range of about 3-5 metres.

I really want to learn the piano part from Rhapsody in Blue. It's almost impossible, but I don't care. I'm going to learn it anyway. Nya!

Here's a scary thought - Base INFINITY. 10 would be infinity!
therefore ten minus one should be a definable number... And so infinity AND infinity minus one would both be definable!
Ghaa!

Yeah... I'm going to go now. Been real good talking to you. Typing to you. Typing. Ish. Or something...


Ps. Check out this song on subatomic particles. It's awesome!