Page 128 of 132

New Servos and Rails for CNC upgrade

Back in October-November Surpluscenter was 'giving away' brand new servos at 40usd/servo when the cost for new ones can be 1000+usd/servo ! So we just had to get these for our next cnc upgrade. Here are some 400 W Sanyo Denki P5 100VAC brushless servos. The bigger servo, third from the right is a 1 kW model. The catch is that these servos need an advanced servo amplifier/drive to operate. There are several amateur/open-source efforts which aim to produce such a drive cheaply or DIY:

To finance the amplifier development/purchase and the rest of the upgrade, I am selling three of the 400W servos.

Below some IKO LWL 15 rails which will also be used:

Futaba strikes back !

One of the most exciting things for a while now in the R/C world has been the 'no crystall' radios operating on 2.4 GHz from both Nomadio and Spektrum

Now it appears that the big players are entering the game. These pics of an upcoming Futaba product were just posted to the IOMICA forum:

The Rx on the right supposedly has two internal antennas (no wire antenna exiting the Rx) and weighs only 14g !

These images were found at and
but otherwise there seems to be very little information available...

If anyone knows more about this system please post a comment below !

Mapping the IOM World

Using Frappr, Frank Vella has created an online interactive map for all IOM sailors.

If you own an IOM, go to
and register !

WordPress 2.0

I have upgraded the site to WordPress 2.0, mainly because of the much improved 'Write Post' interface, now a WYSIWYG editor called tinymce.

The upgrade has broken my theme and some of my plugins so it will take a few days before everything is working again...

Update: The theme is now somehow working again and I have installed a cool flash plugin (flashfader) that cycles banner images at the top.

Results analysis

There's been discussion on the IOMICA Forum about simulating radiosailing races in order to study the effects of different heat racing systems. Specifically, it has been suggested that a bigger number of boats should be promoted/relegated from each heat (currently 4, using HMS).

In order for the simulation to be realistic each in-silico skipper's performance should be varied randomly around some mean performance index. To anchor the simulation in reality, I've here taken the results from the last three international events (2003 Vancouver, 2004 Arcos, 2005 Mooloolaba) and calculated the standard deviation of each skippers score during the series.

There's a clear correlation between standard deviation and final placing indicating that the top skippers perform more consistently than others. I also find it interesting that the datasets from different events are broadly speaking identical.

Update: Along these lines, Lester Gilber has worked on an Event Simulator, with perhaps the aim of figuring out the most optimal heat management system.

The Glasshouse Mountains, Queensland, Australia

During the lay-day of the 2005 IOM Worlds in Mooloolaba I had the chance to visit the Glasshouse mountains [1] [2] [3], a set of volcanic peaks named by James Cook.

Perhaps the most spectacular of the peaks, Mt Coonowrin, is now closed for climbers due to safety reasons.

2005 IOM Worlds, Mooloolaba, Austalia

Better late than never - some of my own pictures and comments from the event.

Continue reading

Animal macros from 2003

Had these macros of small animals on my homepage for a while during 2003, but then took them away for some reason. Here they are again:

Continue reading

Rudder design for Noux IOM

Finally decided to make some proper rudder moulds for the Noux. This design, based on the rudder a number of Noux boats have been using for 1-2 season, was chosen. It's a simple(based on a Marblehead rudder by Bob Sterne actually) moderately deep rudder with a fairly thin section (just enough to accomodate a 4 mm rudder stock).

Below some pictures from the CNC milling of aluminium moulds.
Continue reading

Motor mount for new Opti motor

Spent today milling a new motor mount for the ABB motor we are planning on putting on the Opti.
Here's the raw material, a 120x20 mm aluminium bar. The 6-flute 6 mm endmill we used is visible in the left upper corner.
Continue reading

© 2018

Theme by Anders NorénUp ↑