Drosophila 80mm nano toothpick frame by Mard0

Last crawled date: 2 years, 10 months ago

Update 27-05-21
v3 is a compromise between v2a and v2b. It has some motor protection, but not as much as v2b. It's weight is roughly 3,7 gram which is 0,6 gram heavier than v1 and only 0,1 gram heavier than v2a.
Update 25-05-21
After many crashes I was able to break a frame. An arm broke near the motor mount after a hard crash on concrete. I've made 2 new versions with extra reinforcements at this place. v2a has the reinforced arms, v2b has the reinforced arms and motor protection. I would rather break a frame then a motor(shaft), version v1 could still be useful for that.
Background
This is a 80mm frame that can be printed using ordinary plastics that can be used to transform tiny whoop parts into quiet nano toothpick. The frame is designed to be as light as possible with the least amount of material under the props to block airflow.
It's definitely not as powerful as a larger quad, but due to it small size and quietness it's perfect for parks and playgrounds.
Maiden flight:https://youtu.be/il0f0DEt6-U
As for my build: I'm using the innards of a mobula6 19000kv. I've flipped the board to be able to access the USB port. The props are the HQ 40mm bi-blades. The 2 "rubber bands" used to hold the battery are actually the beginning of a balloon. This, on it's own, holds the battery okay. I've later added liquid electrical tape to the cross section at the bottom to grip the battery a little bit better. I've flown using 300mah batteries and 550mah batteries. 300mah is a lot lighter but the flight time is "only" about 3min. The flight time of the 550mah is about 6min, but it is a lot heavier. A 450mah (which I do not have) is probably the perfect compromise.
I've remixed this canopy to be used as a lightweight alternative for this build.https://www.thingiverse.com/thing:4868238
My PIDs are a ballpark. They work okay for my build, but they may need more work. I'm using 24khz bluejay ESC firmware. I've enabled RPM filtering and changed the dynamic filter accordingly, but other then that my filters are at the stock 1.0 value.