Hello, im new here
Ive been working on this concept for a hexapod design, and I need to know whether the parts in the kits are identical to Tetrix. From all of the pics i have seen, it appears to be, but i just need to confirm that. This is important, because I want to make the legs fold up and compact in a very specific way. In addition to this, I hope to get it to hover… thats right, in the air. I would like to know where I can get high thrust capability fans.
Any advice will be appreciated.
They might be. Horn patterns for Hitec servos would be the same. Get a part, measure the hole circle diameter, etc. The LM part drawings are available on the LM website.
I like this wheel about 72mm Dia!
A lot of the parts look very familiar.
http://www.active-robots.com/products/mindstorms4schools/tetrix/tetrixomniwheel-250.jpg
Alan KM6VV
For my next project (a terminator hunter-killer r/c drone ) I will use EDF brushless fan jet.
http://www.filmschoolrejects.com/images/terminator05-hunterkiller.jpg
I plan to buy them from Hobbyking :
You can have up to 4 pounds of thrust.
Or here :
hobbypartz.com/rclander-ledf120-1a83-830kv.html
Up to 12 pounds of thrust (but for 420 $ 
)
But you don’t need such power for gliding (could be cool to have a flying hexapod :mrgreen: ).
There is one with up to 5 kg Thrust (~11 pounds).
hobbycity.com/hobbycity/stor … oduct=4235
(without Motor)
Kool thanx for the info. BTW, does anyone know how heevy the hexapods are on average?
With Hexapods it is like with humans: the older, the fatter
An Average value should be 2,5 kg.
Greetings
Daniel
Hi,
I have a couple of duckted fan planes.
Don’t think you will be able to do that… it’s barely enough to make a plane fly.
You need to have some speed to be efficient.
Only my opinion
Eric Nantel
Qc Canada
He doesn’t need to have speed, he just wants his hexapod to hover, so it should be enough no ?
If the hexa weighs 2.5 kg, you need to have a little more (3 kg ?, depends on the real specs of the EDF) thrust at full trhottle to make it take off.
After that, you put the throttle to 2.5kg and it just hover.
I mean you need to gain speed to have something efficent.
Don’t think you can lift that much weight since you need to carry battery…
It’s barely usable for plane…
Again it’s my oppinion, i would like to see it working…
For the truly psychotic (and wealthy) you could bypass electric ducted fan jets, and just go straight to …
Jetcat!
jetcatusa.com/
I really don’t think this could ever be a workable design, but that never stopped me before! Um, but the cost of this one would definitely stop me.
This probably wouldn’t even generate enough thrust to get it airborne an inch, especially with fuel. But you’d have the loudest, baddest, and most expensive non-working bot around!
A quick review of the specs… y’know, this just might be do-able, with twin jets you could develop quite a bit of thrust, depending on model. We might be talking 'bout a NASA-size budget though. These are real jet engines, and rather dangerous.
But what a realization of a concept!
Yes those Jet engine are amazing…
That would work for sure… But at witch price… lol
i suggest more something like that…
Easy to build and cheap too. All electronics can be buy at Hobby King and the gyro
system is proven to work great.
rcexplorer.se/projects/tricopter/tricopter.html
Eric Nantel
Qc Canada
Yeah, cool mini jet engines ! 
I was just saying it could work because of the newtionan mechanics laws.
Fthrust - Fweight = Mass * Acceleration
So, if you can have a 2.5 kg complete hexa (should be possible, or use a quad ) and a 3kg thruster, you have :
29.43 - 24.525 = 4.905 N = 2.5 [kg]*1.962 [m/s²]
Should set it fly past your head in less than a second (after the take off).
Is “Jetman” wearing 4 Jetcats? He truly is a daring individual. Um, maybe foolhardy?
Lets call it what it is: monumentally stupid.
Any slight problem and he is a flying fireball at best, or a slightly dirty expanding cloud of burning fuel and debris at worst.
At 5000 feet altitude.
Not a prospect that fills me with confidence.
Isn’t confining this to ‘robotics’ enough? If that screws up, well, back to the drawing board.
But as for cost… say, 10,000 for twin motors and some associated gear (100 lbs thrust, maybe 25 lbs), another 5 to 10,000 for rest of robot (computers, RF gear, telemetry, arms/legs/landing gear, sensor array, 40 lbs), maybe another 5000 in misc. costs, another 10 lbs …
For the cost of a new car, you could build a robot like the picture that weighs 50 to 75 lbs.
Now, getting all these pieces to play together nicely requires… a bigger brain than I have. But I think it is within a well-heeled hobbyists’ budget. Material costs only. The time and skill levels needed to get it up must be a team effort. It is just too many specialized areas to be best at all of them.
Back on topic. A hex that can fly, if not hover. Foldable wings? Dragonfly?
And if the slightest thing goes wrong, the fireball or cloud of debris doesn’t include me. 
You need to add the weight of the ducted fan and battery.
As for myself i would consider the tricopter thing… can be integrated in the exapod body.
And i have see a lot of people carying dslr camera with those… so weight should’not be a problem
Again my oppinion
Actually, whatever I use for lift, I was planning on having one for each leg. Based on what you guys are telling me, just one will be plenty. If I had six… well, wieght should not be much of a problem (considering I would probably need a lot to counter the thrust). Since I was wanting to design my own custom ultra slim thrusters (which will look similar to a computer fan) , I needed some alternative ideas, should it fail.
My project was to build a small scale EDF powered (not a jet powered one).
Was saying 2.5 kg for the all.
Did you check the specs, only one consume around 25 Amp !!
This is the big drawback of my project, the battery pack will be discharged in a matter of minutes.
Seconds… lol
