mm
mm
429g
This is the H4 Alien 680mm frame with all of the original parts, no substitutions or modifications.
This assembled frame does not include the optional end plates or GPS mounting plate. It also does not include the landing gear that came with the kit. I wanted to focus on the basic frame itself, without any accessories.
Also, I have to say I was really pleased the total weights matched up. I wasn't expecting it to be so close. The actual tubing that comes with the H4 Alien frame is not in the database so I used the 16mm tubing from Hobby King because the wall thickness, and overall finish are identical. The problem with the Hobby Kind tubing is that if you order 8 pieces, chances are that all of them will have a slightly different outside diameter. Each piece I measured varied by as much as 0.15mm. I used the average weight/cm in the database so apparently it works out. For this example, if the total was off by 4g, it would still be 99% accurate.
Next, I'll be making copies of this project to see how I can reduce the weight, without having to purchase or cut any materials. Right away, I can eliminate some of the parts I don't need. For example I could get rid of 4 motor plates since I'm building a quadcopter, not an X8. That will also reduce the number of bolts by 16.
Stay tuned!
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M3 x 20mm steel socket head
These are used for the motor mounts, 4 per mount, and for the tubing end clamps, 1 per motor arm
23.0g
M3 x 6mm steel button head socket
Used to attach frame plates to aluminum spacers and motor mount plates to motor mount halves.
22.7g
M3 x 6mm steel allen head w/1.5mm shank
Used to attach the Tarot tube clamps and end clamps to the frame. They are slightly smaller and lighter than the regular M3 x 6mm steel bolts.
12.8g
Tarot 16mm tube folding clamp
These are used to clamp the motor tubes in either their open or closed positions
44.0g
228mm long
16.0mm OD Carbon Fiber tubing
Over a 400mm length, there is +/-2g difference between the tubing that comes in the H4 Alien kit and the Hobby King tubing listed here.
32.5g
216mm long
16.0mm OD Carbon Fiber tubing
Over a 400mm length, there is +/-2g difference between the tubing that comes in the H4 Alien kit and the Hobby King tubing listed here.
30.8g
Motor mount plate, carbon fiber
The frame comes with 8 plates in case you want to build an X8.
23.2g
Standoff, 20mm aluminum
Spacers that go between the main top and bottom plates
8.8g
Tarot 16mm tubing end clamp
These attach to the end of each tube and provide the pivot point for each arm to fold.
27.4g
Irregular Shape
1.5mm carbon fiber plate
This attaches underneath the main bottom plate with four short aluminum spacers. It has slots for battery straps
16.0g
Irregular Shape
1.5mm carbon fiber plate
This piece covers the large, rectangular hole in the main top plate
9.0g
Irregular Shape
1.5mm carbon fiber plate
These fit into slots in the main top and bottom plates to stiffen the frame
8.0g
