3.5" cinewhoop or 5" cinematic? Choosing your first cinematic FPV build in the UK

"Which one should I build first?" is the most common question we get. For cinematic flying the honest answer comes down to two sizes: a 3.5" cinewhoop or a 5" cinematic quad. The 7" long-range builds are brilliant, but they're a second or third quad, not a first.

This guide is written for UK pilots, which matters more than you'd think. UK rules, UK weather and the kind of places you can legally fly all push the decision in particular directions.

What each size is for

3.5" cinewhoop. Ducted props, compact and relatively gentle. It's built for close-proximity shots: through doorways, around cars, along a hedge line a metre off the ground. The ducts mean a light brush with something often doesn't end the flight. It gives smooth, controlled footage rather than big sweeping moves.

5" cinematic. The all-rounder. It's fast enough for sweeping reveals and chasing cars, heavy enough to cope with wind, and it carries a better camera. Most of the FPV footage you've admired was shot on a 5". It needs more space and more respect: exposed props at speed are a real hazard.

The UK rules angle

Both sizes weigh over 100g, so both need a Flyer ID and an Operator ID. With the battery fitted, a 3.5" on 4S usually lands above 250g too, so in practice both fly in the A3 subcategory: far from people and 150m from built-up and recreational areas. Weigh your own quad ready to fly before assuming otherwise.

If flying closer to people really matters to you, a dedicated sub-250g build is a different conversation, with its own trade-offs in wind and image quality. Our guide to UK FPV drone laws explains the categories in full.

Where you'll actually fly

UK pilots mostly fly over farmland, at club fields and on private land with permission (see where to fly FPV in the UK). That's open ground with wind and space, which suits a 5".

If your realistic filming locations are a friend's venue, a yard, an industrial unit or a car meet with the owner's permission, the cinewhoop suits them better. It's also the better choice indoors, where the Open category outdoor rules don't apply in the same way. You still need the building owner's permission and everyone inside needs to be happy with it.

Running costs

The kit price is the smaller part of the story. You'll get through props, batteries and small hardware steadily, especially in your first months. Props for a 5" are cheap and plentiful but you'll break more of them. A cinewhoop's ducts protect props but take knocks themselves.

Our breakdown of the real cost of a 5" build in the UK covers where the money goes. The consumables subscription exists precisely so you never have to guess which props and screws fit your quad.

Before you buy anything

• Buy the radio first and learn in a simulator (Liftoff, Uncrashed or VelociDrone). 10–20 hours of sim time saves a lot of broken parts.
• Pick your goggle ecosystem, DJI or Walksnail, because the quad's video system has to match. Our comparison helps.
• Get your Flyer ID and Operator ID while you wait for your kit.
• Join FPV UK or the BMFA for insurance and to find people to fly with.

Our recommendation

If you're not sure, start with a 5". Our 5" Cinematic kit is the most versatile first build for UK conditions and it teaches you skills that carry across to every other size. Choose the 3.5" Cinewhoop if you already know most of your filming will be close in, around buildings or indoors.

Still undecided? Compare every kit side by side on the kits page, or ask us through the contact form on the about page.