LYNX Beetleweight

[mrsam]

Hi all, i've decided that i'm going to start designing a beetleweight version of Hatchet called LYNX, why LYNX? because in America LYNX deodorant is called AXE and i thought that was a cool coincidence. I'm hoping to build this alongside Hatchet 2 and have it ready for the end of this year/beginning of next year. I'll also be trying a Brushless motor for the axe, i realise that this means i'll have to gear it down quite heavily but hopefully i'll be able to get some advice on the best way to do that.

The specs so far (likely to change but it's a start)

HDPE for the chassis, what thickness do people usually go for?
1 -1.5mm Aluminium baseplate
2 1000rpm Ebay gearmotors
Brushless motor for the axe, geared down heavily
Mini Hatchet style axe ( of course)
3s 11.1v Lipo battery

[mrsam]

Just a quick question, i may depending on how difficult it would be build an overhead bar spinner beetleweight like Massacre or Hazard. Are the rules regarding removable links the same as in feathers? i.e a hollow shaft with the link accessible through the top?

[Niels - Team K.a.L.M.]

I would think so, though the slaughterhouse is known to bend the rules here and there.

[swanaldo]

Yes Sam.

[harry hills]

Shouldn't be too hard to do. I'm more than happy to make you a smaller version of the Massacre shaft. I have a beetleweight Massy designed up somewhere too but I won't build it I don't think. Message me if you are interested.

[mrsam]

Right so, Putting the mini hatchet on hold for a while and i'm going to be designing an overhead bar spinner, an extremely stupid overhead spinner i might add. Basically whilst looking through some old bits and bobs i found a whacking great big lawnmower blade that looks perfect, 350mm long, 45mm wide and about 4mm thick weighting roughly 400g. The idea is to have a Hazard/massacre type chassis made from 10mm nylon about 200mm by 180mm and the blade on top sitting about 40-50mm high spinning at roughly 4000rpm. I am under no illusions that this is a good idea and i expect it to send itself flying on more than one occasion but still it should be fun.

[Ellis]

That's a long bar! Overall dimensions and weight of the weapon sound perfectly plausible. If you needed to make it a little more stable the lawnmower blade could perhaps be shortened, or it'd be fairly straightforward to make one/organise a custom one. Best of luck!

[mrsam]

Cheers Ellis hopefully i can get it working properly, my biggest worry is the motor not being able to spin up the very long blade quick enough but only time will tell. The blade in question

[harry hills]

Great stuff. I approve lol. That bar is perfect.

[Ellis]

Does look perfect! Great find!

[PJ-27]

I made a BW with a lawn mower blade a while back, exactly the same as that. Struggled with weight and a good fixing on the blade. though.
New one uses a smaller SS bar.

[Niels - Team K.a.L.M.]

You might want to rotate the bar. The way your holding it now will generate lift

[mrsam]

Cheers guys, it was an awesome find and it does at least look the part, PJ is that Spinza that you were referring too? i'll be going the same route as harry went for Massacre for the mounting the bar i.e a hollow shaft with the link out the top and the blade mounted to a pulley with a bearing in. The only problem i can see at the moment is the motor, i don't see the point of trying to fit a right angle gearbox in a robot of this size/weight so i'll have to try and find a motor that 1) is lower than 50mm and 2) is powerful enough to spin the blade up quickly. This looks ideal but not sure about how good they actually are http://www.hobbyking.com/hobbyking/s...arehouse_.html

[Mega Masher]

Erm......it's out of stock
Unless you go for another one like that
Is it an inrunner

[mrsam]

I won't be buying it any time soon just looking atm, and no it's an outrunner it just has a very narrow can