HQProp Ltd Cine7 (7x4x3) Propeller
Series: HQProp Ltd Propellers for drones
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The HQProp Cine7 (7x4x3) is a three-blade propeller from HQProp Ltd (China) made of glass-fibre-reinforced nylon for 7 in FPV builds made for filming (cinematic) and long-range flights. The designation gives diameter, pitch and blade count: 7 in, 4 in, three blades.
A pitch of 4 in is flat for a 7 in diameter: it keeps the current draw per unit of thrust low and favours smooth flying and flight time over top speed, which makes sense for camera builds. Three blades raise thrust at a limited diameter and cost efficiency. The weight is 10.3 g and the bore 5 mm; the hub measures 13 mm across and 6.8 mm in thickness. The propeller does not fold. Motors with a low KV rating belong with 7 in.
For camera flights two frameworks count: aviation law and data protection. From 250 g take-off mass the operator must register, classes C1 to C3 require direct remote ID, and visual contact remains a condition in the open category, with an observer when goggles are used and a maximum altitude of 120 m. Where identifiable people are filmed, data protection law applies in addition. The propellers themselves carry no class.
Glass-fibre-reinforced nylon is tough and deforms in a crash rather than splintering, but it tires at the blade root and hub when it is loaded often. For steady footage the propeller must run free of imbalance: small nicks or deviations in shape show up as vibration in the video. The set consists of two left- and two right-rotating propellers and is replaced together.
Technical data
Other data
| Blade count | 3correct |
|---|---|
| Diameter (inches) | 7correct |
| Folding | nocorrect |
| Hub bore (mm) | 5correct |
| Material | Glasfaserverstaerktes Nyloncorrect |
| Pitch (inches) | 4correct |
| Weight (g) | 10.3correct |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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