AT A GLANCE
✅ 4-inch unibody frame
✅ Sub-250gr
✅ 15+ minute flight time
✅ Excellent gyro noise performance
✅ Encased electronics
✅ No props in view
✅ Capable of 100 mph
THE STORY
As a professional FPV pilot, and I couldn’t find a sub 250gr drone that actually did what I needed: long flights, clean footage, and reliable FPV streaming.
So I built one.
While working on OnAirLink (yes, shameless plug: onairlink.com), I set out to design a frame specifically for long duration FPV streaming. Over a year of development later, AIRLINK STREAM V1 is the result.
A 4-inch unibody frame that stays under 250gr, flies for 15+ minutes, and keeps the stack electronics fully encased for protection and performance.
Long flight times don’t happen by accident. They come from careful design and very specific component choices.
RECOMMENDED SETUP
This is the configuration used and tested:
DJI O4 Pro Air Unit
FlyFishRC Micro GPS (10mm M10)
RadioMaster RP3 (2.4GHz ELRS, diversity)
470µF 35V capacitor
T-Motor 1404 2900KV motors
Any 25×25 AIO rated for 35A continuous
(Tested with Foxeer Reaper 45A)Gemfan 4024 bi-blade props
WHAT'S IN THE BOX
AIRLINK STREAM V1 frame in T700 Carbon
The only four screws required for the stack
Camera dampening unit
All required 3D-printed parts
Battery strap
No extras. No missing hardware.
WHAT IT'S FOR (and what it isn't)
This frame is designed for professionals, but it also excels at cruising, medium-range flights, and any application where efficiency matters.
This is not a freestyle frame in its stock configuration.
Can you run tri-blade props? Possibly. I haven’t tested it. If you do, drop to 3.5 inch tri-blades, 4-inch tri-blades risk overheating the motors if using 1404.
Being optimized for bi-blade props, prop wash performance isn’t the focus. What you get instead is an incredibly light, floaty feel, smooth dive recoveries, and exceptional efficiency.
This is not a 5-inch replacement. It’s a different class entirely.
Where it shines is long, clean flights, especially when streaming and chasing fast moving subjects.
PRICING (yes, it's expensive)
For a 4 inch frame yes, it’s expensive.
The raw frame alone costs me around £45.
Add all prints, hardware, packaging, and over a year of R&D, and this quickly stops being a budget product.
This frame is aimed at professionals. If the price doesn’t make sense to you, it probably isn’t for you, and that’s fine. Cheaper clones will surely come along.
I make very little money selling this frame. If I take time out of my day to print, pack, and ship one to you, I’d at least like to afford a pint at the pub afterward.
I’ll never recover what I actually spent on this project.
This isn’t a mass market product.
It’s a passion project, built for pilots who know exactly why it exists.
