Let's Make Robots!

Trata II - The destruction! (Thanks Jip!)

Moves faster than Trata, on snow and ice

Update: Thank you for asking me to make a jump with this, jip. Now both Trata and my camera are broke. (Last video) - But hey - Snow is melting, who needs Trata any more? Time to rebuild!

PS: Jumps with things that are driven on a high placed force makes ugly jumps!

******

I just wanted to play some with the original Trata, that I made the other day in 2 hours. I picked up some materials, and oops, I made a Trata II instead :)

 

I tested it in the evening, on hard snow, and it was very fast and fun! In winter time we don't get a lot of day/sunshine-time, so it is always a quest to find time to shoot video when it's not too dark (like on Trata I)

Next day / today, I was going to shoot a good video.. but we got like 30 CM of loose powder snow! And it is not made for that, it just falls through and get burried.

So there is only a pre-video for now, I have to wait for the weather to change, or the snow to settle a little..

 

Theory is this:

Below is shown where the point of gravity is. It is supposed to be way back. I want it to allmost stall / have the front very light, so it can take the roughher snow, and lift itself up.

IMG_0018.jpg

If this should be too much, I have placed some sticks at the back to prevent it to flip completely over, and let the propeller hit the snow.

IMG_0021.jpg

(Yes, the propeller is broka enyway on the pictures :) It was a late night test run, and happened because the servo fell off. Not enough hot glue! (And too few wirestrips)

Now, IF it should not lift itself over some pile of snow, I do not want elsectronics to dive in, so this upside-down deck was placed in the middle, as a "sledge". 

IMG_0014.jpg

second.jpg

IMG_0024.jpg

IMG_0044.jpg

 

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Hi Fritsl,

I have been playing arround with prop driven vehicles a little, next one try and make the prop lean backward (from a side view) about 20 degrees. You'll be pleased with the power increase ;)

Greetz, DutchBot

Does this power increase come as a result of the motor lifting the weight to a small extent thus reducing friction?

Yes but it also directs the propwash downwards to the "solid" floor oposite to aiming it straight into a "fluid" sky. This allows for little more presure to build up resulting in more forward momentum.

Oh, does it really?

I sometimes wondered if that was the case!

Helicopters can use a trick similar to this, it's referred to as the 'ground effect' - although there are actually several 'ground effects' that influence aircraft =)

Oh, thanks, interesting!!
Cool! Post soon :)

I don't know if there is already a page with the answer to this question, but how did you get the bot to work with you r/c remote?

Also, those are some bona fied knitting needles!

This is NOT a "robot" - it is posted as "Something else".

If you click the link to more info in the post, you will find the first version of this, and the explanation:

I had an old RC car. I took out the electronics, and put it together like this, with a propellar.

It is essentially the same RC car, I just took away the wheels and chassis, and added some new stuff, like a propellar.

This is just a very simple thing, for fun. Take your old RC, rip the electronics, and put it in use for something else fun, that is what it is about :)

Reminds me of a conversation between a man and a woman on the couch.  ; )