Some observations about Phantom max payload - RC Groups
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Apr 13, 2013, 11:31 PM
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Discussion

Some observations about Phantom max payload


Just a small test I've ran tonight; DJI claims the overall fly weight should be kept below 1kg, which leaves around 200g for payload.

After some testing, using a water bottle mounted underneath (difficult payload as the water mass shifts all the time), it appears that it flies reasonably well with 320g (1130g AUW). It's sluggish and I think it doesn't hold position as well (in part because of the liquid payload, I'm sure), but it's definitely workable if you're a decent flyer and doing AP work using a quality gimbal.

We then tried 380g (1190g AUW) payload, which was considerably more difficult on the quad. The climbout was there but very slow (approximately 1m/second), and the motors could be heard fluttering during direction changes. Again it is workable for a good flyer doing AP, and I managed to fly pretty tight and complicated patterns in a park between trees with it, but you're on the absolute limit of what the stock quad can do and you can forget about fast flying.

The conclusion here was that looking from an AP perspective and ignoring flight times, I'd easily mount up to 300g on my stock Phantom.
I may repeat this test with 9x4 Zinger props.
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Apr 14, 2013, 02:09 AM
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Why is the Phantom's max weight 1000 grams, and the F330's maximum weight 1200 grams? Both have the same motors and props.
Apr 14, 2013, 03:14 AM
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I have no idea, maybe DJI is being cautious considering the target audience for this quad (no previous experience, etc).
Apr 14, 2013, 06:19 AM
Perhaps the different ESCs
Apr 15, 2013, 01:06 AM
HGT
HGT
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Quote:
Originally Posted by Bad_Wolf
Why is the Phantom's max weight 1000 grams, and the F330's maximum weight 1200 grams? Both have the same motors and props.
The F330 is a lot lighter. Other than that, it is using equivalent components.
Apr 15, 2013, 01:30 AM
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Quote:
Originally Posted by flitelab
Perhaps the different ESCs
Both have 18A ESC's. ???
Apr 15, 2013, 01:46 AM
Mmmmmmm!
WiseDuck's Avatar
The regular DJI Opto ESCs can take 4S. 4S makes a HUGE difference so I always use 4S on all my FXXX frames. It's a shame the Phantom can't take that. Well, it can, someone tried, but for how long? It isn't really rated for 4S.
Apr 15, 2013, 03:54 AM
HGT
HGT
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Quote:
Originally Posted by Bad_Wolf
Both have 18A ESC's. ???
The DJI Phantom is using the following Alpha and Omega MOSFETS.

4430 N-CH 30V 18A 8-SOIC
4407 P-CH 30V 12A 8-SOIC

I haven't dissected an 18amp OPTO to see if both the P & N channel MOSFET's are 18 amps.
Apr 15, 2013, 11:08 AM
Registered User
Payload capacity is rated on motors and props....You always use an ESC that is suitable for the given motor and props.....Some people do this backwards limiting their choice for certain changes that could be made like prop size and voltage of batteries...


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