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V4

picoQuadcopter

After the construction of the first quadrocopter with directly mounted motors and the resulting vibrations that affected to the readings of the IMU and make this Quadcopter difficult to control, for the other structures, a new, but still simple, absorbing motor mount was sought.
Inspired by the so-called vibrationreducer of model helicopters I searched in this the area of implementing rubbers for a suitable solution. Canopy grommets may be used for very small motor diameter. From 4mm to 10mm normal small implementing rubbers can be used. This gets you all on the Internet.
And so I found the canopy grommets MSH51054 for Protos500 helicopter as perfectly appropriate suspension damping for Hextronik 2g brushless motors. For the other engines I use tiny implementing gums, which I bought as I said on the internet.

Canopy grommets

all used grommets

Of course, the holes have to be somewhat bigger for the motor installation. Well, it proves useful that was somewhat higher in laying out the framework for the motors :-). The following table shows the required dimensions fot the motors:

motors	diameter motor mount	diameter for grommets
X-Twin	6.0mm	7.5mm
Hubsan/Ladybird	7.0mm	8.5mm
Hextronik 2g	3.5mm	5.0mm
HP02T	5.5mm	7.0mm

Since the Ladybird feet, mounted directly on the engine, can no longer be used and for the other engines anyway a generic solution is needed, I searched for 'any' best variant of lightweight plastic.
   By chance I found in a hardware store "Knotenbänder (node bands ?)" of which represent short segments the perfect solution - flexible yet stable enough. Pasted in the holes, which were intended for the feet or a protective frame, they meet the exact requirements.

Knotenbänder (node tapes ?)

Knotenbänder (node tapes ?) singles

For the propeller I was looking for an alternative to the Silverlit X-Twin sets. However propeller under 50mm are not typical. For Amax and the Blade Nano QX I found one with 46mm propeller.

Propeller sets

Propeller singles

And so it comes to the construction of the planned combination of motor and receiver...

2. buildup	X-Twin/Bluetooth	Hextronik/DSM	HP02T/Bluetooth
motor mount	motor mount	motor mount	motor mount
on the scale without accu	on the scale without accu	on the scale without accu	on the scale without accu
on the scale with 250mAh accu	on the scale with 250mAh accu	on the scale with 250mAh accu	on the scale with 250mAh accu

The motors of the second building's sitting with Hubsan motors & DSM2-receiver intentionally so high. This structure should be the first option on which the 5.8GHz camera is to be tested as a FPV. Certainly the scheme must be trimmed again - after all, the added cam brings a additional weight of more than 4gram with it.

5.8GHz camera TE60A	picoQuadcopter with camera	TE60A on the scale
without accu on the scale	camera at work	with 250mAh accu on the scale

And also with the Hextronik 2g brushless motors a good FPV version can be realized. These motors are (in this case positive) high enough to mount the 5.8GHz camera.

brushless with camera

brushless with camera at work

with 300mAh accu on the scale

So I'll now have enough material, which have to learn the stable fly :-)
As a small pause filler, in between times when I may not see the PID control variables, I also work at a very small variant of a DSM2 Transmitter/Controller ...