Inspire 2 Top Speed

Viper Pilot · Mar 19, 2017

Well, after several flight tests with the new F/W, I'm almost 100% certain that the I2 top speed has been further reduced. Didn't notice anything about that in the F/W notes and the DJI I2 site info doesn't list and change. Wonder what's going on?

NickU · Mar 19, 2017

With the new firmware, I've still had it in high 50's and early 60's (mph), so I've not seen any reductions.

Viper Pilot · Mar 19, 2017

Very interesting! Perhaps the conditions I was flying in were not conducive to max speed test. The location was the same as I flew at when I did my testing before the F/W change and I reached 58-60 mph at that time.

NickU · Mar 19, 2017

I've had it around 71mph with .240, but that was with a definite tailwind. The high 50's runs were without any noticeable surface winds and in various directions (i.e. The wind wasn't particularly assisting or resisting those

)

Casey53 · Mar 19, 2017

I would not reply on GO for the speed. I don't trust its numbers at all. Even the DNG EXIF data is stamped with insane altitudes at times where I know I was under 30 feet and it shows over 100 feet in the EXIF data on the DNG file. Might be better to time it with a radar gun or speed against a car or something else. Even a cheap paintball radar gun is probably more accurate and can be had for maybe $80 or less.

Viper Pilot · Mar 19, 2017

I've read that before that the Go 4 app may not give reliable speed numbers. I guess if it indicated the speed was 100 mph I would believe it but if it indicated the max speed was 50 mph I'd question its accuracy. LOL Oh well, it's still faster then I can run!

Viper Pilot · Mar 19, 2017

NickU said:
With the new firmware, I've still had it in high 50's and early 60's (mph), so I've not seen any reductions.

Was your top speed measured with a camera attached or just the airframe with no camera?

NickU · Mar 19, 2017

I Always fly with the payload camera attached - I can guarantee that if I left the camera off, then that would have been the flight I could have got a 4K video of the Loch Ness Monster with Elvis

low_budget · Mar 19, 2017

I updated to the new firmware and thought there was a top speed reduction at first.

I was getting top speeds around 46-50mph in sport mode with low winds. Then I later tried atti mode and got the advertised 57mph in low wind and 70 mph once with the help of a tailwind. Had the X5S attached.

The Go app was not displaying speed correctly in MPH before a recent update fixed that. So I don't really know the Inspire 2's top speed before updating firmware.

Viper Pilot · Mar 19, 2017

ha! ha! So very true. A fellow on the DJI forum says his top speed measured was using the ATTI mode as opposed to S mode. I'll have to try ATTI tomorrow to compare to S mode.

The Editor · Mar 20, 2017

NickU said:
I Always fly with the payload camera attached - I can guarantee that if I left the camera off, then that would have been the flight I could have got a 4K video of the Loch Ness Monster with Elvis

With Lord Lucan Riding Shergar in the background!

Meta4 · Mar 22, 2017

Casey53 said:
Even the DNG EXIF data is stamped with insane altitudes at times where I know I was under 30 feet and it shows over 100 feet in the EXIF data on the DNG file.

That's because DJI (for a reason no-one understands), use GPS altitude data for the exif info.
GPS is woefully inaccurate for altitude and is commonly 100-200 feet out and shifts over small time frames.

Steelej · Mar 22, 2017

Viper Pilot said:
ha! ha! So very true. A fellow on the DJI forum says his top speed measured was using the ATTI mode as opposed to S mode. I'll have to try ATTI tomorrow to compare to S mode.

You should be getting top speed in sport mode.

John

Viper Pilot · Mar 22, 2017

That was my thinking as well. If you look at the specs it indicates that in Sport mode the pitch angle is up to 40 degrees I believe. In ATTI it's limited to 35 degrees. I would thing that more pitch would result in higher speed.

fefe · Mar 23, 2017

i just tried today in sport mode 80kmh and in ATTI mode 98kmh

Viper Pilot · Mar 23, 2017

Interesting!

Nick H. · Mar 24, 2017

You know, one of the things I was looking forward to was seeing this faster speed. I just got my I2 2 days ago and it is screaming at me to update the firmware. I haven't yet considering the complaints I read here. Problem is, I must have the slowest I2 out there. Mine only goes 34mph. Other than its stability, it looks no different than my I1. I was very disappointed. It climbs a lot faster, but that's it. It is slow, especially on acceleration. I've only tried sport mode. Haven't tried atti yet.

Spy · Mar 25, 2017

Based on my history log the highest Top speed that I was able to achieve was 77 when I recieved my I2 in January. It was indicating in the 70's regardeless of wind direction even with the X5S attached when ever I took it out. After a few firmware "DOWNGRADES" I have not been able to get it over 52. The I2 will probably be the last Inspire that I buy. What I have now is not what I purchased in January as it relates to performance.

Spy · Mar 25, 2017

Viper Pilot said:
Interesting!

I just hit an indicated 72mph in ATTI mode with a tail wind and the I2 was fully loaded.... it's the fastest I've seen since the last firmware upload. I had the X5S equipped with a OLY 45 and two Lume Cube's attached. I was totally shocked by the numbers. I'm really confused now.