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Discussion: Pity about one control

in: O-ing; O-ing > 2019-10-26

Oct 26, 2019 8:44 PM # 
Is there a reason why they do not make the SiAIR contact field wider than 30 cms? Because you have to get so close I often felt last weekend there was a greater chance of losing control of the bike if I tried the ride by fast technique.
Oct 27, 2019 11:48 PM # 
Apparently it’s because the smaller SI units can’t fit the battery necessary for the bigger contact field. I suggest the different associations should get a set of the bigger boxes with bigger batteries so we can have 1.3 or 1.8m field for MTBO championships.
Oct 28, 2019 12:41 AM # 
Was it a bigger field at act champs last year? I ended up stopping a lot to touch controls this time which i dont remember doing there (i think controls might have been a little closer to paths too).
Oct 28, 2019 12:42 AM # 
Good idea - have you passed on the request to anyone in power? Or perhaps they will read this thread.
Oct 28, 2019 6:45 AM # 
30cm is pretty standard in Aus and that was the case in ACT last year too.

Toph asked me about purchasing a set of new units for bigger ranges but he was concerned he wouldn't make back his outlay by renting them out to state associations for events if they didn't want to use them.
Oct 28, 2019 6:54 AM # 
Must just be my bike skills then! Toph might be right, he'd prob need some agreement beforehand. I guess the Vic series might be interested depending on cost.
Oct 28, 2019 10:17 AM # 
I talked to Craig S and PowA - QLD and NSW are in. All up cost for 30 stations would be $8,295. Kay was keen to get something organised.
Oct 28, 2019 10:40 AM # 
Wonder if there are there any IOF rules around the size of the field that is allowed in international events?
Oct 28, 2019 9:22 PM # 
Yes there is - it has to be 1.5m
Oct 29, 2019 7:46 AM # 
Maybe we should see if we can get an ASC grant. Development, enhancement of the sport, bringing world championship event(s) to Australia.
Is 30 enough? Would probably do one event but how would we go at moving from one event to the next for a multi day event like a world championships.
Oct 30, 2019 12:39 AM # 
30 would not be enough for a typical WC sprint (depending on complexity) or even middle, especially across four different courses. Definitely not enough for mass start - we had 42 controls on our course alone in Denmark (okay some were pivot but you get the idea).
Oct 30, 2019 4:57 AM # 
Other may be aware of this but I asked Aussie O gear for some info on this issue and they got this reply back from Sportident.

SPORTident developed 3 different sizes of Beacon Control Station. First you can configure the BSF7/8 (normal control stations) in Beacon mode. Than you get an Air+ range of approximately 0,3 -0,5 m.
The second Beacon Control Station called BS11-BS we developed according to the requirements of IOF MTBO commission. These have an Air+ range of 1,5 – 1,8m. The third Beacon Control Station ist BS11-BL with a radius of 3m.

The size of the stations is determined by the size of the coil that generates the field. A large electromagnetic field requires a large coil. The battery or battery capacity is of secondary importance.

The price of an BS11-BS (those control stations for MTBO) is about twice the price of a BSF8.
In Germany we organized the World Masters MTBO this year and we used BS11-BS as control station.

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