RC ERA C186 Helicopter: BO105 Mini Heli Specs and Tips
The RC ERA C186 is a small 4-channel single-rotor helicopter styled after the MBB BO105, at 1:48 scale. It has a 25.6 cm main rotor, a 23.5 cm length, a flybarless head with 6-axis gyro stabilisation, barometric altitude hold, one-key take-off and landing, three speed levels and a front LED. It runs on a 7.4 V 350 mAh battery charged by USB in about 40 minutes, with quoted flight times around 15 minutes. Versions like the C186 Pro and C186 MAX add features such as optical-flow positioning on some models.
By Kyle HilsonUpdated: October 20263 min read
Specifications
| Item | Value |
|---|---|
| Scale | 1:48 (BO105 style) |
| Rotor | 25.6 cm |
| Length / height | 23.5 / 8 cm |
| Channels | 4 |
| Stabilisation | 6-axis gyro, altitude hold |
| Battery | 7.4 V 350 mAh |
| Flight time | About 15 min (quoted) |
| Range | About 80–100 m |
| Remote | Mode 2, 4×AA |
From RC ERA and retailer listings, checked October 2026; versions differ.
Why it’s popular
The C186 offers a real single-rotor flybarless layout at toy price, with stabilisation that makes it easy to hover. Altitude hold means you don’t have to manage throttle constantly, so beginners can focus on direction. It’s a good bridge between coaxial toys and hobby helicopters. Types are compared in micro RC helicopters.
Binding
- Install AA batteries in the remote and charge the heli battery.
- Switch on the helicopter on a flat surface, then the remote.
- Follow the manual’s pairing step (often moving the left stick).
- Wait for the lights to go solid and the gyro to initialise.
Some pilots bind C186-type helicopters to multi-protocol radios; check compatibility before trying.
Flying tips
- Use the lowest speed setting at first.
- Fly indoors in a large room or calm outdoor spaces.
- Practise hovering tail-in, then side-in.
- Use one-key landing if you get disoriented.
- Land when the low-battery warning shows.
Next steps
When you’re comfortable, try a 6-channel collective-pitch helicopter for more control and aerobatics. Options are compared in best remote control helicopters for adults.
Care and parts
Spare main blades, tail rotor, batteries and canopies are sold for popular versions. Check blades after crashes, keep the motor free of hair and dust, and store the battery partly charged.
How it differs from a coaxial toy
Many cheap indoor helicopters are coaxial: two rotors stacked on one shaft, spinning in opposite directions. They are very stable but can’t really fly forward quickly and are easily pushed around by a draught. The C186 uses a single main rotor and a tail rotor, like a full-size helicopter, so it moves in all directions more like the real thing and handles a light breeze better. The gyro and altitude hold do much of the stabilising work, but the pilot still has to manage direction and orientation, which is the core skill for flying any helicopter. That makes it useful practice before stepping up, and its low price means a crash costs a set of blades rather than an expensive repair.
Limits to know
It’s still a small, light helicopter: wind beyond a gentle breeze pushes it around, the toy-grade remote has limited range and adjustment, and battery life drops as cells age. Treat the quoted flight time and range as best-case figures.
Battery care
Buy one or two spare batteries for longer sessions, let them cool before charging, and never leave them charging unattended.
FAQ
What is the C186 helicopter?
A 1:48 BO105-style 4-channel flybarless mini helicopter from RC ERA.
How long does it fly?
About 15 minutes quoted.
Does it have altitude hold?
Yes.
Can it fly outdoors?
In calm weather.
More on this topic: the complete RC Helicopters guide covers the basics behind this article.
About 20 years in RC. Mostly boats in the NAVIGA Mini Eco Expert class, with many self-made parts; also a King Motor Baja 5B, a home-built electric plane, home-built nitro planes he has flown, and an RC helicopter. More about SwellRC
