4 ms·

That's also terrible from a vehicle agility/stability perspective -- generally you want to centralize mass as much as possible to reduce moment of inertia. Addi

by asteli 8y ago

That's also terrible from a vehicle agility/stability perspective -- generally you want to centralize mass as much as possible to reduce moment of inertia. Additionally cylindrical cells waste mass on metal casings -- li-poly pouch cells are a better use of mass.

noobiemcfoob 8y ago
Would you not accept 10x terrible handling for 3x longer flight times?
- cecja 8y ago
  with the newer versions of flight controller you could fly a cow if it had 4 rotors attached. I doubt they will have handling problems.
- ALittleLight 8y ago
  Depends on the purpose of the mission. Flying for fun or to deliver packages agility is probably more important. Flying for surveillance perhaps it would be better to be in the air longer.
  - heavenlyblue 8y ago
    To be fair, what's going to happen to the drone shipping industry is probably the same thing that happened to the naval shipping industry: we will converge somewhere at local minima between super-fast and super-cheap shipping times. So I could see how fitting the batteries everywhere in the drone might just work. But at the same time I don't see why no one is yet shaping the batteries for the frame itself.
- dexen 8y ago
  Quad-/Multi-rotors use tilting [1] for steering - including speeding up and slowing, and maintaining / recovering stability. Increased moment of inertia surely increases energy budget necessary for stability and maneuvers, which means lowered energy for flight. Of course if the weight saving is good enough to offset that, it may still be better off with structural batteries. And the energy budget increase can be calculated pretty well. [1] achieved by differential thrust, achieved by speeding up / slowing down opposing engines
Faaak 8y ago
Tesla thinks otherwise with their new batteries used on model 3 though
- stetrain 8y ago
  They probably aren't optimizaing for mass as much as you would on a flying drone.

by asteli 8y ago

noobiemcfoob 8y ago

Would you not accept 10x terrible handling for 3x longer flight times?

cecja 8y ago
with the newer versions of flight controller you could fly a cow if it had 4 rotors attached. I doubt they will have handling problems.
ALittleLight 8y ago
Depends on the purpose of the mission. Flying for fun or to deliver packages agility is probably more important. Flying for surveillance perhaps it would be better to be in the air longer.
- heavenlyblue 8y ago
  To be fair, what's going to happen to the drone shipping industry is probably the same thing that happened to the naval shipping industry: we will converge somewhere at local minima between super-fast and super-cheap shipping times. So I could see how fitting the batteries everywhere in the drone might just work. But at the same time I don't see why no one is yet shaping the batteries for the frame itself.
dexen 8y ago
Quad-/Multi-rotors use tilting [1] for steering - including speeding up and slowing, and maintaining / recovering stability. Increased moment of inertia surely increases energy budget necessary for stability and maneuvers, which means lowered energy for flight. Of course if the weight saving is good enough to offset that, it may still be better off with structural batteries. And the energy budget increase can be calculated pretty well. [1] achieved by differential thrust, achieved by speeding up / slowing down opposing engines

Faaak 8y ago

Tesla thinks otherwise with their new batteries used on model 3 though

stetrain 8y ago
They probably aren't optimizaing for mass as much as you would on a flying drone.