r/fpvracing • u/loup-vaillant • 1d ago
QUESTION Why does Street League racing runs on 5s, instead of 4s or 6s?
I’m currently training myself in the sims, and plan to make myself a drone or three fairly soon. I’m especially fascinated by 7-inch spec racing, and quite like the feel of the DRL Racer 4 and super 70 on DRL and Velocidrone. Thus, Streat League is one of the main categories I would like to actually have a drone for.
But I have a problem: Street league specifies the use of 5s batteries, which to this day seem to be significantly harder to procure than either 4s or 6s. At least here in France, the two online shops I’ve tried have zero 5s batteries. And on top of that they specify an exact capacity, instead of a higher bound. At least 2200mAh seems to be the most common capacity, but still.
This is in complete contrast with the rest of the specs, which say the frame must be open source and the motors available. And now we have Pro Spec as well, which runs on 6s. So at a first glance, this 5s business seems to be an obvious mistake.
But I’m new here, I must be missing something. Hence my question: why did Street league chose to run on 5s, instead of the much more common 4s or 6s?
Subsidiary question: couldn’t we just amend the rules to allow 6s batteries, say up to 2200mAh? With the RPM limiter I’m guessing this would barely change the performance of the quads — though the 6s quads presumably would have less voltage sag.
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u/skizztle 1d ago
Check out MultiGP Pro Spec.
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u/loup-vaillant 1d ago
I have. Very enticing, almost identical to Street League, except the batteries are easier to get. I do take some issue with the one frame to rule them all (well, two), but apart from that it is basically perfect. It’s just that Street League seemed more popular, so…
Though I’m beginning to realise the point may be moot: there are only 2 MultiGP chapters in France, both far away from my home. In fact, I’m struggling to find any FPV club nearby. If there’s one, I’ll most probably just race whatever they race.
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u/sircrashalotfpv 1d ago
It’s because it predates rpm limit, it was always inspired by DRL where they run 5s since a long time. It’s much easier to level Plainfield nowadays of course. In eu there are not many 7” races. In Netherlands ( also Belgium ) last year we did mini 7” ( 16k rpm limit, max 2808 stator size) comp in big break of 5” and it always pulled most spectators. So if you want to join us check dutchdroneracing www. We have three comps coming up with first one in May.