Wednesday, February 27, 2013

I-Lap Timing Systems to Release New Micro Transponder


I-Lap Timing Systems is about to release a new "micro" version of its system's transponder units. The new units, pictured above on the right, are said to weigh half as much as the traditional ones (left).

More info available at Mini-Z Racer forums.

Wednesday, November 28, 2012

New Kyosho Mini-Z Racer MR-03VE


Chassis pre-installed with high performance brushless motor!

Next generation MINI-Z introduces even more durability and power!

The next evolution of the MINI-Z Racer now incorporates the latest brushless motor technology into its performance. Never used before on a MINI-Z, this model includes the same-sized ‘Team Orion XSPEED VE’ brushless motor with its characteristic high durability, power, RPM and a flat torque feel. The MINI-Z takes full advantage of the brushless motor’s efficient low friction; non-contact properties that minimize wear and reduce electrical noise to deliver outstanding linear response and smooth acceleration for a sensorless brushless motor that is approved for use in the MINI-Z Cup and other official races. A limit applied to maximum RPM keeps the playing field level for all drivers. In addition, a newly designed circuit board with ICS function connects to a PC (adapter sold separately) for precision setting adjustments. Just download the ‘ICS VE Manager’ software from the Kyosho website to manage the brushless motor settings and remove the RPM limit to extract the full potential from your machine. The newly designed upper cover also allows simple mounting of the optional gyro on top and the chassis is equipped with the MR-03 ball diff that was previously optional. Now the MR-03’s dynamic performance is turbo-charged with brushless motor power to mark a new stage in the evolution of MINI-Z performance and technology.

More information and detailed pictures available at Kyosho website.

Wednesday, March 21, 2012

Another Mini-Z Super Slow Motion Video

This is an edited version of the previously posted super slow motion video of a Kyosho Mini-Z MR03. A few "on-board camera" shots were inserted.

Saturday, March 17, 2012

Mini-Zs Super Slow Motion Video at Haagring

This is a super slow motion (240 fps) video of two Kyosho Mini-Zs MR-03 splitting a corner at the end of Haagring's longest straight.

Saturday, December 17, 2011

Haagring's Formula Mini Cooper

We just started a new Mini Cooper series, with strict stock regulation.

The only allowed mods are: tires, bearings, t-bar (kyosho carbon only), and any body modification that doesn't affect exterior appearance (including modifying the original front body clip).

After some flipping and rolling runs all cars are now manageable and competitive. Lap times are 15 to 20% higher than the track's fastest lap though.

Monday, November 28, 2011

New Venue, New Layout

After being closed for a couple of months, Haagring is now re-open, at a new address and with a new updated layout. Changes were minor, just to adapt to the new space.

Tuesday, August 2, 2011

New Additions to Haagring's Fleet


These are the newest additions to Haagring's fleet: the Weider HSV-010 2010 (MZP218WD) and the Epson HSV-010 2010 (MZP218EP).

Thursday, June 2, 2011

Virtual Wind Tunnel: June 02, 2011 Update

This is a general update on all the recent CFD "virtual wind tunnel" simulations of a Kyosho Mini-Z MR03 Mazda 787b 3D model.

In addition to the configurations tested previously (no wing, flat rear wing, 15, 30, 45 and 60 degree rear wing) three additional ones were considered: broken wing, gurney flap, and scoop wing.

The table below shows drag and down forces for all the different rear wing configurations tested:

Drag (gf)
Down Force (gf)
No Rear Wing
6.2
- 7.8 (lift)
Broken Wing
6.4
- 3.8 (lift)
0o Rear Wing
6.6
- 0.5 (lift)
15o Rear Wing
7.7
4.6
Gurney Flap
7.2
5.7
30o Rear Wing
8.9
8.0
45o Rear Wing
10.1
8.5
60o Rear Wing
10.6
9.3
Scoop Wing
11.7
13.5

A chart showing these results, and the trade off between drag and down forces, is available here.

All values above consider the car "racing" at 10 m/s (36 km/h). Charts showing the results for other speeds (2.5, 5.0, 7.5 in addition to 10 m/s) are available here.

Detailed results and pictures for each of the simulations are posted in the following links:

Virtual Wind Tunnel: 60 Degree Rear Wing
Virtual Wind Tunnel: Scoop Wing

Streamlines, pictures showing the theoretical trajectory of particles flowing around the car are posted here (colored according to pressure coefficient - Cp) and here (colored by air speed).

Videos of vertical plane streamlines, "3D" streamlines and particle tracks are also available.

Once again, all results come from a computer simulation of a Kyosho Mini-Z MR03 3D model, resembling a Mazda 787b car body. None of the results have been validated empirically at a real wind tunnel, so all the typical CFD caveats apply.