The speed limit - FPV and Racing Quad Style - Discussion

General Drone Discussion
1

Went out this afternoon with my iFlight Titan DC2 4S and I think I might have a new entry for the leaderboard…

36.34m/s, or 81.29mph :slight_smile:

Conditions were a light wind ( UAV Forecast reckoned about 13mph ) blowing from the East, so the speed runs were done from E to W. Not sure if just oldish batteries, or because it’s the first time they’ve been fully charged this year, but had pretty bad voltage sag ( down to 13V ) and they didn’t last very long at all - but they are just 0.450mah :smiley:

GPS speed data logged by Betaflight Blackbox, converted to .csv and .gpx using blackbox_decode.

Pic of the drone

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Screenshot of gpx data dragged and dropped into Google Earth

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Screenshot of the relevant .csv data

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If anyone wishes to verify the data, the original Blackbox logfile is available at http://martins-models.co.uk/martin/BTFL_BLACKBOX_LOG_Titan_DC2_20220301_161317.BBL . The fastest run was on flight #2.

Interestingly, with a logging frequency of 500kHz the total of approx 8 minutes of flight today took up 6MB of Blackbox memory - handy as the FC in the DC2 only has 8MB available :slight_smile:

2

Wow, well done Martin. However, just reading the log file. I can clearly see here …

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… that the drone actually returned. For that reason, your entry is disqualified :laughing::man_running::dash:

3

Next break in the weather ( possibly Friday ) I might try it again with some slightly more aggressive props fitted…

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1 Like
4

You’ll need to educate us non-FPV’ers please @MartG1960

Is the iFlight Titan a BNF type drone that warrants its own slot on the leaderboard? Much like Jez @Earwig 's baby croc was?

Can @group-fpv confirm they’re happy? (@MartG1960 you can’t vote/confirm :rofl: )

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5

I bought it in BNF form ( it was my first FPV ) though it is available in kit form, so the distinction between BNF and self-build could get a bit blurred here :confused:

Is there only one entry allowed on the leaderboard for self build ? If so it seems a tad unfair to be have a 2" 4S drone up against a 6S 7" or larger…

6

We’ve long debated splitting the leaderboard in to two completely separate leaderboards / threads.

One for the “high street” drones (the DJIs, Autels, Yuneecs, etc, of the world) and one for the FPV’ers.

I think the time for that split is fast approaching us :blush:

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7

Also worth noting that the #1 spot on the board is held by an iFlight Nazgul…which is also available as BNF or in airframe only form…

Perhaps, to avoid the board filling up with a plethora of various FPVs, a single entry per frame size and battery size ? My DC2 would then fall into the 2" 4S category, while my Evoque would drop into 5" 6S IYSWIM

3 Likes
8

That would be so hard to control tho. So maybe the two categories should be
High Street Vs Custom/BNF/PNP etc FPV
Then custom FPV broken down into
2S
3S
4S
6S?
not too many will have GPS tho to record speed.

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9

That’s OK - an audio recorder will prove when Mach1 is reached. :wink:

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10

I agree to splitting this up. But in the fpv category, no models. Just name and speed? Maybe split into 2. Wing and quad.

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11

Why no models ? There’s a big difference between the capabilities of a 2" quad and a 7" one, so the model would be needed to differentiate

12

Good point. So prop size?

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13

I’d go for prop size and battery size ( 4S, 6S ) as commonly available items - excluding the weird homebuilt 12S etc. monsters

14

Ground-based audio recorder would suffice

15

Would my bespoke self build, home made FC drone be allowed now?

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16

I think forget about frame models or bnf/pnp/custom.
Spit into prop size and battery size. Doesnt mater if its bnf or custom build everyone is on an even footing

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17

Ummmmm yeah - that’s what I meant - you don’t hear the sonic boom onboard - or there would have been a shit load of high profile Concorde passengers suing for loss of hearing. :wink:

18

Splitting to battery size would expand things a little too much? Dunno. A thread needs testing.

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19

If we we’re going for a separate ranking from high-street/gps/camera drones, and going by prop/frame size only, then there’d be few entries as there just aren’t that many distinct sizes in common use ( 7 ? ) so splitting into 4S/6S ( and 5S if anyone wants that too ) would give more people a shot at it I think

1 Like
20

I agree and also each prop size would only be relevant to certain battery sizes anyway if that makes sense? Lol