Wednesday, August 15, 2018

IoT Platform Weight 250 Grams Breakdown

Sorted by the weight of the components

Tattu 1000mah 25C lipo battery set - 79 grams

2 x 39.5 = 79 

GNB 650mah 60C lipo battery set - 61.6 grams


61.7 - 0.4x18/40 tape  = 61.5 grams = 62.9 - 0.7 xt30 - 0.7 wires 

Worst case original packs weighs 0.1 gram extra . 61.5+0.1=61.6 grams.


Crazepony 650mah 50C lipo battery set - 57 grams


 57.7 - 0.7 velcro - 0.4x18/40 tape =  56.8 grams = 58.4 - 0.7 xt30 - 0.9wires


EMAX 2808 660KV Motor - 53.8 grams

The stater weighs 28.7 - 29.6 grams with thinned wires, 29.7-30.6 with original wires; the bell weighs 23.2  grams. Worst case 30.6 + 23.2 = 53.8  grams.

   

T-Motor 4004 kv400 motor - 47.9 grams









The weight of the bell is between 17.3-2.4=14.9 and 17.6-2.5=15.1 grams. The lighter blank stater produces 32.2-3g stater. Worst case with the heavier bell and 0.5g heavier stater is 32.3+15.1+0.5=47.9 grams.

Blade 230 main frame - 23.1 grams

The main frame comes between 26.1 grams and 26.3 grams. The hardware screws weigh 1.3 grams. Cleaning the frame reduces 4.5 grams maximum resulting in between 21.6 and 21.8. So the installation is between 21.6+1.3=22.9 and 23.1 , worst case 23.1 grams

E-Flight BSR main frame - 21.6 grams

The main frame comes between 20.5 grams and 21.4 grams. The hardware screws weigh 1.1 grams. Cleaning the frame reduces 0.9 grams maximum resulting in between 19.6 and 20.5. So the installation is between 19.6 +1.1=20.9 and 21.6 , worst case 21.6 grams.


Oxy2 210mm main blade with carbon set - 17 grams



Turnigy MX-95E digital servo set  - 14.7 grams

Per unit is 9.8 / 2 = 4.9 grams. 3 units per craft is 4.9 x 3 = 14.7 grams

Oxy2 210mm main blade set - 14.6 grams.


Caddx Turtle camera - 12.6 grams

Harness needs trimming out the caddx joystick cables. 12.1 + 0.5(harness) = 12.6 grams .

Favorite Little Bee 20A ESC - 9.7 grams


Raspberry Pi Zero W - 8.9 grams


Oxy2 Sport main grip - 5.9 grams

The newer batches are heavier. 5.9 grams worst case.



BeeMotor 1105 4500kv - 6.1 grams






CC3D Atom flight controller - 4.7 grams




Lynx Blade 230 carbon fiber tail boom -  4.8 grams



GOQOTOMO FPV camera - 4.6 grams


Blade 230 swash plate - 4.4 grams


Blade 230 landing skid set - 3.1 grams

Acrylic 2mm sheet -2.4 grams


E-Flight BSR servo push rod set - 2.2 grams

The original set on sale is shown as 2.0 grams. The 1 extra ball link pair with rod needed to connect to DFC pin is shown as 0.4 grams. The long rod's non-threaded part to be trimmed out is 0.6 - 0.4 = 0.2 grams. So the 4 links total is 2.0 - 0.2 + 0.4 = 2.2 grams.



The long rod, after cutting out the center, non-threaded area, has 2 short segments, each for 1 rear servo rod. One of the original rear rod is used for the front rod. The second original rear rod is used as one of the DFC rod. The extra ball link pair from a second purchase of this item has 1 rod for the second DFC link. The extra ball link pair from the second purchase of this item has 2 ball sockets for the 2 DFC links.

JST-XH charging plug and cable - 2.1 grams


T-Rex 250 landing skid - 2.0 grams a set


Microheli Blade 230 main shaft - 1.8 grams


Velcro tie 3/4 inch with adhesive - 1.7 grams per 17 cm

0.8g / 8cm = 0.1 grams per cm . 5cm for each of the top and bottom attachment for battery. 7cm for battery itself.


Blade 180 CFX main rotor hub - 1.6 grams

XT30 connector -  0.9-1.6 grams




Gemfan 4025 propeller - 1.5 grams




Blade 180 CFX feathering shaft - 1.4 grams



M1.5 x 6mm self-tapping screw - 1.3 grams per 16 pcs

The scale is calibrated with the small bag. 2 screws for each of the 2 custom servo brackets, 2 screws to fasten each of the 2 rear servos, 1 screw for the front server lower tab, 4 screws for landing skids, and 1 screw for each of the 3 servo arms. 2x2 + 2x2 + 4 + 1 + 1x3 = 16pcs. The front servo needs thicker fastener to fit the original larger bores. 

AKK IPEX 5.8GHz antenna - 1.2 grams


Oxy2 Sport DFC pins - 1.2 grams


FrSky XM+ RC receiver - 1.2 grams


TBS Crossfire Nano - 1.2 grams

Runcam camera bracket - 1.1 grams


FrSky R9 Micro receiver - 1.1 grams



E-Flight BSR anti-rotation bracket - 1.0 gram



4x8x3mm bearing set - 1.0 grams


Standoff M2x3x3 - 0.9 grams 9pcs


Wolfwhoop 5V 3A buck converter - 0.9 grams


CHENYANG Ultra Mini DM Micro USB 5pin OTG Adapter - 0.7 grams per pair



Clear mounting tape - 0.7 grams per square inch

The CC3D board's width of 19mm is 75% of a inch for each of the 4 8mm. strips The strip on the row of pins uses half the height of the remaining 25%, resulting in the strip on the pins taking another 25% / 2 x 5 / 8 = 8% weight of the square inch. Totally 75% x 32 / 25.4 + 8% = 102.5% weight of the square inch.

M2x10 fasteners - 0.7 grams 3 pcs


ABS 4x4mm struts - 0.6 grams 4.4cm

Each of the 2 pieces is 2.2cm long. Servos spaced 1.8cm from fastener to fastener. Total width is 2.6cm, but the 0.8cm ends are tapered off. Counting the ends at the centers of the slopes. 1.8cm+0.4cm = 2.2cm .

M1.7 screws - 0.6 grams 4 pcs

Either taken from landing skid set or M1.7x8 screws weigh the same

Mounting inch squares - 0.3 to 0.6 grams per 1 to 2 squares




Blade 230 anti-rotation bracket - 0.6 grams

Zip tie 2mm trimmed - 0.6 grams per 5 pcs


0.4 x 5 / 3 = 0.66 . But the 2 ties for tail are smaller in diameter. 

Enameled 28 AWG wires - 0.6 grams per 111cm


Solder - 0.5 grams per 28-30 points

The 4-8 soldering points adds 0.1 grams, average 6 points. The wires in the first picture have not been pre-tinned in at the cuts. The reading oscillates between 3.6 and 3.7 in the second picture with 4 soldering points, and it settles at 3.7 in the third picture with 8 soldering points.


The solder is a tin-lead alloy and the density is about 9 times that of water. It can be reasoned that each solder job has 1mm cube pre-tin on each side of the wires then joined. So, 2mm cube per job, and the weight is 0.1cm x 0.1cm x 0.2cm x 9g/cc x 6 = 0.1 gram.

28-30 points of added solder are 6 tail motor wire joins, 3 main motor joins, 6 joins for the battery build, 2 for battery plug, 2 for power distribution point, 2 for CC3D power tapping.Then, either 6 points on the caddex turtle or 8 points on the raspberry pi wires. The ESC build uses its own residual solder.

Packaging tape 3/4cm width- 0.4 grams per 40cm

0.3 x 40 / 30 = 0.4 . Battery pack needs 2 9cm taping. ESC build needs 2 9cm taping and 4cm tie. 



Velcro tie 5/8 inch without adhesive - 0.4 grams per 10cm


AWG30 silicon wire - 0.4 grams 30cm

Wires are taken from CC3D accessories. 

M2x6 fasteners - 0.3 grams 2 pcs

The longer 10mm bolts were measured at 0.7 grams previously. 1.0-0.7=0.3 .


Molex Picoblade 1.25mm 2-pin connector - 0.3 grams

Each half is 0.6/2 = 0.3 grams. CC3D uses the socket side.


Oxy2 Sport DFC rod set - 0.3 grams

Previous weighing of Blade 180 CFX main hub had 1.4 grams. The DFC rod set is hence 1.7-1.4=0.3 grams.


M2x4 fasteners - 0.2 grams 2pcs

The longer bolts were measured at 1.0 grams previously. 1.2-1.0 = 0.2 .

Molex Picoblade 1.25mm 2-pin Y-split connector - 0.2 grams

0.5 grams set - 0.3 grams socket conenctor = 0.2 grams y-cable


Heat Shrink Tube 2.5mm - 0.2 grams per 7cm

0.6 grams x 7cm / 24cm = 0.18 grams ~= 0.2 grams


Gardening wire - 0.2 grams per 10cm

0.6 grams x 10cm / 30cm = 0.2 grams

SanDisk 32GB SD card - 0.2 grams


Heat Shrink Tube 1.5mm - 0.2 grams per 10cm


Heat Shrink Tube 0.8mm - 0.1 grams per 7cm

0.4 grams x 7cm / 44cm = 0.06 grams ~= 0.1 grams




Pinion Gear .5 Mod 081.5A - 0.1 gram

1.2 / 19 = 0.063 = 0.1 rounded to nearest tenth of a gram.










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