micro rc gear

23 July 2024

Available for gym indoor flyer.

Not exactly equivalent, for pack includes charger and transmitter (about USD 18, retailing individually at USD 35.96).

Let's say 5g and an AUW of 10g. 412 thrust is 6-7.2g.

Gemini said it would be challenging.

23 July 2024

Good for general sport plane, not as gym flyer.

The brushed electronic pack included 2 servos, 1 battery, 1 charger.

I will save 1/3 by getting the brushed electronic set?

No appreciable weight savings with AIO receiver. Maybe the separate servos will actually be 20g and so the difference is only 3g.

If AUW is 40g (only 2 servos and using 260mah), then the motor thrust is 1.5 times. The thrust is powerful, not enough for 3D which would require at least 2 times.  

Here's a spectrum to consider:

• 1.0 - 1.2: Ideal for beginners in precision aerobatics, offering good control and longer flight times.
• 1.2 - 1.5: A sweet spot for many precision aerobatic planes, balancing agility with power for maneuvers.
• 1.5+: Excellent for experienced pilots who prioritize fast maneuvers and recovery from mistakes, but might sacrifice some flight time.

Anyway, flying aerobatic full-house will require 3 servos, and I can't imagine a single puny servo to work large control surfaces.

From MinimuRC, the product specifications:

High Speed 816 Brushed Motor Set, Motor+gearbox+prop, with 1.27 plug

USD 7.48

6.37g, 107mm prop, 1.5mm shaft dia, 816 brushed motor with 1.27 plug, 3.7-4.2v, maximum 67g thrust

Brushed Electrics Pack

USD33.29

receiver, 2 servos, 260mah, charger

3rd Generation Micro 5CH receiver with battery & motor sockets (for 1S aircraft)

USD 34.98

1g weight, 1.0 JST connector, 3.7v, 

5CH AIO receiver

USD 42.98

3.2g, 24x24, 5 channels, 3.7v, 1.0 jst

1.7 gram micro servo

USD 6.33

1.0 jst, wire length 110mm

3.7v 60mah Lipo

USD5.98

27x13x4 excluding plug, 1.25mm JST, 1.55g

180mah 3.7v 30c Lipo

USD4.98

3.7-4.2v, 180mAh, 30C, 4.66g, 45.7*12.5mm, 1.25mm JST (Molex 1.25)

3.85-4.35v 260mah 20c Lipo

USD 4.98

1.25jst

19 July 2024

Magnetic actuators, <10gm, gym flyer, 220mm wingspan

Minimum RC?

Transmitter, receiver, motor+prop, actuators, 60mah lipo, low charger =$100?

7 June 2024

Differential thrust, use RC quadcopters? 

6 June 2024

Differential thrust is the lightest, the less powerful motors and gear can be used for indoor flyers.

Being able to move the rudder, elevator and ailerons gives much more control, but they are a greater investment then differential thrust rc planes. We have had experience with 8.5mm geared motor driven RC plane, we flew that outdoor and they are just like the normal RC planes that we know, except they are shorter range, smaller, lower performance, and more susceptible to wind and gusts. 

Everybody likes the idea of a living room flyer, but that's where things get tougher.

Basically they are the backyard and gym types.

Backyard flyers AUW 50 gm. Uses servos, geared or direct brushed 7mm dia motors for backyard. 1s 150mah-260mah, will need pushrods.

Gym flyers AUW 10 gm. Uses magnetic actuators, geared or direct brushed 4mm dia motors for Gyms indoors. 1s 50mah-100mah, may not need any pushrods, you only get to make perhaps 300mm wingspan models which doesn't fly slow.

Receiver is about the same weight, but the 0.22gm per actuator vs. 1.7gm per servo is obvious and so are the motor, battery.

Even after the use of connectors, actuator's fine wires are short and can break easily and the battery dies easily.

For durability and easier installation, use servos type.

The wing loading has to be kept down for indoor flyers. 1gm per sq inch may sound to be very light, especially if you have been thinking about 8 oz/sq ft floater with "normal" RC gear, and it won't handle gusts well, but the flying speed is still fast for tight spaces. e.g. 50gm auw for 50 sq inches is too fast for small indoor venue or relaxed flying. Half the wing loading and half the flying speed.

1.27 2 pin motor

1.25 jst battery

1.00 jst servo