VKTechnic's "HEHSTV" Can "Crab" & Normal Steer

[DLuders]

On his website, VKTechnic/ sumwunudontknow posted a

of "The Highly Experimental High Speed Tracked Vehicle...an 8-treaded vehicle based on shuttle carriers."

"Datasheet

Completion Date: 8/20/2011

Power Source: Electric (Power Functions 8878 Rechargeable Battery)

Dimensions: 53x39x13 studs

Drive motors: 8 M-Motors (one for each track)

Total motors: 8 M-Motors, 4 XL-Motors

This project came about while I still had one excavator chassis sitting about. After making four of them for fun, they were connected, and the HEHSTV came to be.

The model itself is driven by eight M-Motors, one for each track. This gave sufficient torque to drive the model over carpet and even some small obstacles. Steering was achieved through four XL-Motors, coupled in pairs by switches. By flipping the switches, one could switch from crab to normal steering."

See 7 pictures on his Flickr photostream.

Edited August 29, 2011 by DLuders

[P4trickvH]

Looking pretty good so far, wonder what the final set will look like.

[Sariel]

A MOC that has more torque for steering than it has for drive... interesting.

[GuiliuG]

A MOC that has more torque for steering than it has for drive... interesting.

Indeed, it's not logical to put Xl motors for steering and only M motors for propulsion. But I don't find interesting to put eight M motors to drive it when you can only put one to have the same effect ( and it's more interessting to build this with one motor for propulsion and gear to connect it with the wheels. Same for the steering.

[Jim]

What a coincidence; I am building kind of the same vehicle with two NXT units and 8 Unimog wheels (instead of 8 tracks).

This one looks great!

Indeed, it's not logical to put Xl motors for steering and only M motors for propulsion. But I don't find interesting to put eight M motors to drive it when you can only put one to have the same effect ( and it's more interessting to build this with one motor for propulsion and gear to connect it with the wheels. Same for the steering.

True!

I am experimenting with one (or two) motor for driving, one for steering and one switching steering modes.

[Nazgarot]

I would think 1 battery would be way to little to make this run good. Have you considered running it on several batteries? It should boost the speed a bit.

[Lasse D]

This is a good start if you want to learn about what need to be done in order to control such a vehicle efficiently. I hope that the creator realizes that the diagonal tracks should be turned and driven in parallel, and that using 4 XL motors for steering is overkill... and that the switch isn't very smart when everything else is remote controlled.

Still. Cool proof of concept.

[Burf2000]

This looks wicked however its far from high speed lol

I love the design however I would of used the XL motors for the drive, if you had done direct drive from the motor I believe it would be quite a bit faster (my tank was).

Also how many batteries is this running off as I found for max power for a motor, you don't want more than 2 xl's running off a single battery (so probably 4 mediums)

[Sokratesz]

You should re-do the tracks and give it some sort of suspension so it can actually climb obstacles.

- Sok.