sabre

**typhoon_driver** · 26th January 2010, 00:35

Finally decided on the name of my next featherweight and spent some time working on the CAD side of things.

For those that don't know I bought the frame and disc off kenny for the vert spinner he was building. Quick spec below,

- 3.6kg tool steel vertical disc, going at roughly 4500rpm
- powered by two brushless motors with a combined output of around 9hp (give or take)
- 10 cell lipos
- bosch 35s for drive
- full titanium chassis

Spent this evening reverse engineering the current frame and disc assembly into pro engineer allowing me to now go on and design the chassis and other parts into the design.

**RogueTwoRobots** · 26th January 2010, 13:50

The disc is only 3.6kg? Wow, for some reason I thought Kenny had made it something mad like 5kg+
Not that being 1.4kg lighter is a bad thing, because it's still going to pack a punch.

Best of luck with the build Gary. Any idea if you're going to incorporate self-righting into it or do you intend to smash up the opposition before they get a chance to flip you? (or is that a silly question?

)

**dgr** · 26th January 2010, 14:30

I remember this from the champs in Newcastle. Brilliantly engineered thing, going to definately pack a punch.

**Kenny** · 26th January 2010, 17:07

you should of said gary i have the cad's for it

**typhoon_driver** · 26th January 2010, 21:23

No worries mate, I've never found drawings from other programs to easily import into pro engineer. Just you worry about sorting out that disc for me

**typhoon_driver** · 11th February 2010, 21:29

Been indirectly doing more work on the robot. For a uni project using ansys to carry out a finite element analysis I decided to carry out an analysis on sabre's disc. The following shows some of the pics of the results,

In each analysis the disc was completely fixed in the center, ie on a solid shaft and the disc was stopped from full speed to a stop within a 30 degree angle. Two rather large assumptions but they get me going on the analysis. Curiously if this was to happen the disc would experience forces of the order of 450kN plus. The first analysis was carried out with the force being applied to a tooth, ie me hitting someone else, and the second with a large force acting at the edge of the disc, ie someone hitting me.

Of course all of this creates these nice colourful pictures which is the bit that everyone's always interested in

**typhoon_driver** · 8th March 2010, 07:18

Spent a bit more time on the CAD for sabre. Now that I have a job for the summer I should be able to afford to throw it all together and use these expensive parts that i've had sitting around for over a year!