Quick Answer
The Sub250 OasisFly range comes in three sizes (2.5, 3, and 3.5 inches). After flying all three, the OasisFly35 with DJI O4 Pro is the pick for most pilots wanting near-5-inch handling in a sub-250g package. The OasisFly25 is the one if pocketability matters more than raw power.
Why the OasisFly Range Caught Our Attention
We first saw the OasisFly25 at a trade show last year and dismissed it as "another 2.5-inch BNF." Then Nick from our team reviewed the OasisFly35 and came back surprised. The 3.5-inch wheelbase hits a sweet spot: enough prop authority to pull out of dives, small enough to stay under the CAA's 250g A1 threshold. We published full flight-time and handling data on our main blog because the numbers genuinely surprised us.
The whole range shares the same DNA. Side-plate frames, Redfox AIO flight controllers tuned out of the box, and ELRS 2.4GHz as standard. Differences come down to prop size, motor choice, and camera gear.
The Three Sizes Head-to-Head
| OasisFly25 | OasisFly30 | OasisFly35 | |
|---|---|---|---|
| Props | 2.5 inch | 3 inch | 3.5 inch |
| Wheelbase | 135 mm | 150 mm | 175 mm |
| Motor | 1404 4500KV | 1404 4500KV | 1804 3450KV |
| Dry weight | ~170 g | ~175 g | 162-213 g |
| Ready-to-fly (4S) | ~210 g | ~215 g | ~245 g |
| Sub-250g? | Easily | Yes, with care | Yes, barely |
The 25 and 30 share 1404 motors but spin different props. The 35 steps up to 1804 motors with lower KV, giving more thrust. On a 4S 530mAh pack, the 35 hovers around 245g, right at the sub-250g line. The 25 sits closer to 210g with plenty of headroom.
Which Size Actually Flies Better?
In our workshop flights, the OasisFly35 O4 Pro felt the most composed through prop wash and fast transitions. The 3.5-inch props carry more momentum, so recovery from aggressive moves is smoother. Nick's review called it "near-5-inch efficiency in a compact frame."
The OasisFly25 is the agility pick. Smaller props mean less rotational inertia, so it snaps into rolls faster. Our OasisFly25 review found it handled prop wash better than the 30. If you fly tight spaces or want something that fits in a jacket pocket, this is the one.
The OasisFly30 is the hardest to recommend. Same motors as the 25 with the weight penalty of a bigger frame. Unless you have a drawer full of 3-inch props, we would go either smaller or larger.
Analog vs O4 Pro vs WTFPV
The analog OasisFly35 starts around £190 with a Send T1600 VTX at 600mW on 5.8GHz. The O4 Pro GPS version sits around £370, with the gap almost entirely the DJI air unit. If you own DJI Goggles 3 or N3, go O4 Pro.
The WTFPV GPS variant ships without an air unit but with GPS fitted. At around £150, it is the budget path in. Add your own video system later.
What You Need to Get Flying
Every OasisFly BNF ships with ELRS 2.4GHz installed. We use the RadioMaster TX16S MK3. For analogue video you need 5.8GHz goggles. DJI O4 Pro pilots need Goggles 3 or N3. See our DJI O4 setup guide for compatibility.
All three sizes run 4S LiPo via XT30. We use 530mAh for the 25 and 30, and 530-730mAh for the 35 depending how close to 250g you want to sit.
Our Picks
All-rounder: OasisFly35 O4 Pro GPS. Near-5-inch flight feel, sub-250g, digital HD, and GPS in one package.
Budget: Analog OasisFly35 at £190. One of the best-value BNF quads we have flown this year.
Portable: OasisFly25 for pilots who value pocketability and indoor capability over outdoor punch.
FAQ
Q: Is the OasisFly35 really sub-250g?
A: The analog version is 200g without battery. With a 4S 530mAh pack, around 215g. The O4 Pro GPS variant is tighter at ~245g. Legal, but no margin for extras.
Q: What is the difference between PNP and BNF?
A: PNP ships without a receiver. BNF/ELRS includes an ExpressLRS receiver already bound. If you have an ELRS radio, go BNF.
Q: How does it compare to a 5-inch freestyle quad?
A: Not a replacement. A 5-inch on 6S has more authority and handles wind better. But the OasisFly35 gives you 80% of the experience at half the weight, and the A1 category is more flexible for where you can fly. See our 5-inch build guide for the full-fat alternative.
Q: Do I need a CAA licence to fly these?
A: Since January 2026, drones between 100g and 250g with a camera need both an Operator ID (£12.34/year from the CAA) and a Flyer ID (free online theory test). The OasisFly range falls in this bracket. Full details in our UK drone laws guide.
Q: Which receiver should I choose?
A: The ELRS 2.4GHz receiver fitted to BNF models works with any ELRS radio. If you use TBS Crossfire, choose the PNP version and fit your own receiver. See our ELRS receiver guide for the full breakdown.