Wednesday, August 15, 2018

IoT Platform Weight 250 Grams Breakdown

Sorted by the weight of the components

GensAce 900mah 25C lipo battery set - 75.4 grams

3 cells of one pack 56.5-56.7 grams. One is 0.2 grams heavier.
When the 2 packs are trimmed, they weigh 75.2 grams combined. 
Worst case both packs are the heavier pack adds 0.2 grams combined, 75.4 grams.

GNB 650mah 60C lipo battery pack - 60.3 grams

The pack comes with very short wires. It needs patch work with 3/4 inch scrap wires as shown here.



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



Emax 9051 servo set  - 13.5-14.7 grams

For Mateo, 4.5g x 3= 13.5g. For CC3D, 4.9g x 3 = 14.7g.




Oxy2 210mm main blade set - 14.6 grams.

GEPRC 1404 2750kv motor - 9.4 grams







Caddx Turtle camera - 9.2 grams

Raspberry Pi Zero W - 8.9 grams

Happymodel 1404 2750kv motor - 7.8 grams

Favorite Little Bee 20A ESC - 8 grams



Beitian BN-180 GPS - 5.6 grams









Oxy2 Sport main grip - 5.9 grams

The newer batches are heavier. 5.9 grams worst case.
 


Lynx Blade 230 carbon fiber tail boom -  4.8 grams





Blade 230 swash plate - 4.4 grams


Blade 230 landing skid set - 3.1 grams


HGLRC FD411 - 2.9 grams




16A ESC - 4.6 grams per pair
the tab weighs 0.2g


AKK 5.8GHz video transmitter x5 - 2.4 grams


Kydex 1.5mm sheet - 2.2 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 - 2.4 grams


Velcro tie 3/4 inch with adhesive - 1.9 grams per 19 cm

0.8g / 8cm = 0.1 grams per cm . 3cm for bottom attachment for battery. 5cm for top attachment for battery. 7cm for battery itself. 4cm for GPS, split between the frame on top of servos and GPS itself. 


T-Rex 250 landing skid - 2.0 grams a set


Microheli Blade 230 main shaft - 1.8 grams




XT30 connector -  0.9-1.7 grams





Blade 180 CFX main rotor hub - 1.6 grams


Gemfan 4025 propeller - 1.5 grams




Blade 180 CFX feathering shaft - 1.4 grams



M1.5 x 6mm self-tapping screw - 1.4 grams per 18 pcs

The scale is calibrated with the small bag. 2 screws for each of the 2 custom servo brackets, 2 screws for each of the 3 servos' tabs, 1 screw for the front server lower tab, 4 screws for landing skids, and 1 screw for each of the 3 servo arms. 2x2 + 2x3 + 4 + 1 + 1x3 = 18pcs. 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



E-Flight BSR anti-rotation bracket - 1.0 gram



4x8x3mm bearing set - 1.0 grams


Wolfwhoop 5V 3A buck converter - 0.8 grams


24 AWG enameled wire - 0.8 grams per 45cm
7.5cm for 2 power input of each of the 2 ESCs. 5cm for each of the 3 main motor poles. 

Solder - 0.7-1.3 grams per 35-62 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. For joining the 22 AWG, wire lead is 3mm in length,  0.4mm cross section area pre-tin on each side of the wires then joined. So, 2.4mm cube per job, and the weight is 0.1cm x 0.1cm x 0.1cm x 9g/cc x 2.4 = 0.021 gram.

Original build has 3 main motor joins, 9 tail motor joins, 2 power distribution points, 2 battery plug points, 2 power tapping on the buck converter, 2 power tapping far end, 8 points on raspberry pi, 3 points on receiver, GPS 4 points. 35 points.

Adrenaline diving build relocates raspberry pi's points to camera and VTX, then 3 servos needs 3 points each, 2 ESCs needs 2 points each. 35+13=48.

Endurance build needs extra 7 points for ESC build and 9 points for battery build. 48+16=64.

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




JST SH 1.0mm 4-wire connector -

0.9 grams per set

JST SH 1.0mm 3-wire connector - 

0.7 grams per set 




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.


 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 - 0.3 grams 2 pcs

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

Mounting inch squares - 0.5 grams per 1.75 squares



Blade 230 anti-rotation bracket - 0.6 grams

Zip tie 2mm trimmed - 0.7 grams per 5 pcs


Enameled 28 AWG wires - 0.6 grams per 111cm


M2x4 bolts with nuts set - 0.5 grams


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. 


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.


M2x10mm bolt - 0.3 grams


Packaging tape 3/4cm width- 0.2-0.3 grams per 22-26cm

2-cell batteres needs 2 11cm ties. Endurance battery needs 2 8cm ties for cells and 2 2.5cm wraps and a 5cm wrap for the charging wires.


M2x2 fasteners - 0.2 grams 2pcs

The M2x4 with nuts set were previously measured at 0.5 grams




SanDisk 32GB SD card - 0.2 grams


Heat Shrink Tube 1.5mm - 0.2 grams per 10cm



Pinion Gear .5 Mod 081.5A - 0.1 gram

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


Gardening wire - 0.2 grams per 8cm

0.6 grams x 8cm / 30cm = 0.16 grams




Heat Shrink Tube 2.5mm - 0.3 grams per 10cm

0.6 grams x 10cm / 24cm = 0.25 grams 










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