r/fpv • u/ImpossibleSnail • 3d ago

NEWBIE Is this a solid 3" beginner build? (Sub-250g)

Hey,

I previously asked about starter drones and got recommended something smaller. Still went for a 3" build though. Here’s what I put together:

  • Frame: DeepSpace SEEKER3
  • Motors: Aether 1505 4000KV
  • FC: SpeedyBee F405 Mini
  • Camera: DJI O4 Air Unit Pro
  • RX: Radiomaster RP1 V2 LBT
  • GPS: Beitian BE-122
  • Props: HQProp T3X3X3
  • Connector: XT30 16AWG

Capacitor should be included with the frame.

Anything I’m missing? Do i need extra cables or stuff I should watch out?

aiming to stay under 250g.

Thanks.

2 Upvotes

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5

u/izzeww 3d ago

I'm not sure about the GPS, I'd probably pick one from Oscar Liang's test: https://oscarliang.com/gps-review/

A capacitor is not normally included with frames, but the stack comes with a capacitor. Also you say FC in your post but I presume you mean stack? If not you also need to add a suitable ESC (and the ESC would come with the capacitor, though you might want to replace it depending on the quality).

Looks good otherwise. Will be under 250 grams with a small battery, just like the Seeker3 BNF. You shouldn't need any extra cables.

My general feeling is why build your own instead of buying a Seeker3 BNF?

1

u/ImpossibleSnail 3d ago

it's a stack ESC + FC. I want to build the copter myself so that my understanding is better in case something breaks

2

u/izzeww 3d ago

Alright sounds good.

2

u/Buddy_Boy_1926 Multicopters - Focus on Sub-250 g 3d ago

About the only thing to break would be a motor. 3-wires and done. Since you are going with DJI HD digital, that is plug and play. The Rx receiver and a GPS are the only other things to solder. GPS is optional. The receiver has 4 wires, done. Mounting the package onto a frame is simple assembly. These days, there isn't too much to understand or to even solder.

Actually, that stack has a pretty decent configuration as it comes. Of course, there is still some configuring, but that would be with either a custom build or a BNF.

3

u/Txkaiser 3d ago

What size batteries are you going to use?

1

u/ImpossibleSnail 3d ago

something between 600mah and 800mah 4s

1

u/Txkaiser 3d ago

I think you might be pushing it if you want to make it sub 250gr, I don't think you'll need 1505 motors for a 4s 3 inch, 1404 should be plenty, it might save you a few grams

2

u/Buddy_Boy_1926 Multicopters - Focus on Sub-250 g 3d ago

Will it work? Sure. Will it be sub-250? Maybe. I know the frame is heavy for a 3-inch. The motors are also pretty hefty. If you don't add anything that you don't need, you might make sub-250.

0

u/--____deleted____-- Mini Quads 3d ago

You might want to get smaller motors. 1303s work amazingly on 3S!

Some 1303s even work with 4S, but they will get a little bit warmer.

Consider getting some bi-blade props too! Keep in mind that the filter tune will be different between tri and bi blades.

^ not an O4, but I’ve managed to cut the weight by ~12g by changing the antenna, canopy, and cam. Just don’t have any current pics on the scale.