Questions tagged [performance]

Use in questions asking about the physical capabilities or limitations of a drone/model aircraft.

Filter by
Sorted by
Tagged with
3 votes
1 answer
402 views

Would it be possible to perform a manual flip with my camera drone?

I have a Snaptain SP510 camera drone. I haven't flown in a while, but I'm interested in getting back to it. After seeing some videos, I began to wonder if I'd be able to perform a manual flip. I know ...
Sovereign Inquiry's user avatar
1 vote
1 answer
57 views

I need to find either the relationship between power and lift force in helicopters (RC ones if possible)

My original goal was to investigate the relationship between voltage and lift force in toy helicopters, however I've been advised that it will be easier to find help with the relationship between ...
user avatar
2 votes
2 answers
1k views

How does the Switchblade 300 drone maneuver?

I was wondering how the Switchblade 300 drone (https://www.avinc.com/tms/switchblade) is able to maneuver? On all photos I can find, there is no sign of any ailerons - so does it wiggle the wings at ...
Jørn Wildt's user avatar
1 vote
1 answer
1k views

How to calculate lift for multiple rotors?

So I know that $L = \frac{1}{2}​ρv^2AC_L$, but if I want to find the lift for a three-blade helicopter, do I just multiply by 3 or what? Let's say I have a 700mm rotor at 61mm wide, would it be: $L = ...
leasthollow's user avatar
6 votes
3 answers
117 views

The Effect of Pitching Moment on Aircraft Stability

I'm designing a small RC plane and I'm currently at the first iteration of airfoil selection. I have converged to Clark-Y, NACA-2412, NACA-2415, and S-8036. In comparing the four, I noticed that all ...
user3993's user avatar
4 votes
1 answer
70 views

If AUW is 90 grams, will 4500Kv motors be better than 7500Kv?

I have a build that is 90 grams and runs great with 7600Kv motors. My question is, if everything stays the same and I put on 1204 4500Kv motors on it, would I get more flight time? More power or ...
Billy's user avatar
  • 41
2 votes
1 answer
1k views

How to determine the minimum thrust to weight ratio for a fixed-wing aircraft?

I am considering building a fixed-wing aircraft with foam board, and I'm unsure what the necessary thrust to weight ratio is. With quads, it's easy to determine the necessary thrust. Just find a motor/...
Jacob B's user avatar
  • 5,802
7 votes
1 answer
184 views

How can I run 2207 2450Kv motors on 4S with 7” props?

I’m looking to use some spare motors I have to build a 7” rig. The problem is that they are 2450Kv, and I don’t want to burn out my other components. As I understand it, if I set a motor output limit ...
Drones and Whatnot's user avatar
3 votes
2 answers
49 views

Do propellers at different angles work the same? And do intersecting flows of air work the same?

Say a propeller pushing thrust downwards generates 70 lbs of force. If you tilted the angle of the system to 45 degrees would it generate the same thrust? If you had each rotor angled inwards of a ...
Gabriel Kusiak's user avatar
3 votes
2 answers
488 views

How to reduce propeller tip losses?

I have heard that tip losses in propellers can occur when a propeller is highly loaded (when there is a much higher pressure under the prop blade than above it). This can happen with drones that fly ...
Jacob B's user avatar
  • 5,802
4 votes
1 answer
423 views

Does the sharpness of a propeller blade affect efficiency?

Some of the propellers I have used on drones have sharp edges (sharp enough that they have cut me) and others have comparatively dull edges. Does the sharpness of the leading edge of a propeller ...
Jacob B's user avatar
  • 5,802
18 votes
3 answers
5k views

Why are quadcopters inherently unstable?

I have heard it mentioned that quadcopters are inherently unstable and only become stable due to control. What does inherently unstable mean in this context, and why are quadcopters inherently ...
Jacob B's user avatar
  • 5,802
3 votes
2 answers
428 views

Is there an advantage to having more LiPo cells in a low-power drone?

A major reason that high performance racing or freestyle drones use LiPo batteries with high cell count (6s rather that 3s or 4s) is so that the voltage won't sag as much. This allows high performance ...
Jacob B's user avatar
  • 5,802
2 votes
1 answer
1k views

How do ducted fans impact drone performance?

There are many drones available which use ducted fans as opposed to open propellers. How does a ducted fan quadcopter differ in performance from an open-prop quadcopter? Note: the other question ...
Jacob B's user avatar
  • 5,802
5 votes
1 answer
9k views

How does the center of gravity affect a quadcopter?

I have heard a lot about center of gravity for fixed wings, but very little about the CG in quadcopters. How does moving the CG forward or backward impact the flight characteristics of a quadcopter? ...
Jacob B's user avatar
  • 5,802
6 votes
2 answers
422 views

For custom multirotors, what is the most useful method of collecting flight data?

When it is desirable to know exactly what is happening on a multirotor, such as when flight testing a new multirotor concept or design, what measurement equipment and circuit designs are most useful ...
HansenJC001's user avatar
7 votes
4 answers
2k views

How does frame stiffness affect a quadcopter?

When choosing a frame for a drone, something I hear mentioned occasionally is how flexible the carbon fiber is. It seems that the general opinion is: more flex in a frame is worse. How would having a ...
Jacob B's user avatar
  • 5,802
3 votes
5 answers
313 views

How to determine the largest LiPo I can use in a quadcopter?

Multirotors can usually operate with a larger battery than recommended for longer flight times but slightly less performance. However, there is a point of diminishing returns at which increasing the ...
Jacob B's user avatar
  • 5,802
5 votes
2 answers
1k views

What is the performance difference between a brushless motor with a wider vs taller stator?

In the drone motor industry, there are a lot of variations in the stator sizes of brushless motors. There are several motors that have similar stator volume but one is wider and the other is taller. ...
Jacob B's user avatar
  • 5,802
4 votes
2 answers
1k views

What is the difference between a patch and helical antenna?

I have seen both patch and helical antenna when shopping for video receiver antennae. All I know is that they are both directional antennae. Do these types of antennae have any inherent performance ...
Jacob B's user avatar
  • 5,802
7 votes
3 answers
537 views

What is antenna gain?

As I understand it, generally, a higher gain antenna will result in a longer range and better reception for FPV flying. What is antenna gain? What makes a low-gain patch antenna different that a high-...
Jacob B's user avatar
  • 5,802
3 votes
1 answer
239 views

How does a propeller with more blades create more "grip"

I have heard that the more blades a prop has, the more "grip" it has in the air at the expense of speed. How do more blades create more grip but lose top speed?
Jacob B's user avatar
  • 5,802
3 votes
2 answers
996 views

Does the performance of a brushless motor decrease over time?

The brushes wear out in brushed motors and their performance decreases until they stop working, but brushless motors have fewer parts in contact and thus don't wear out nearly as fast. Does the ...
Jacob B's user avatar
  • 5,802
3 votes
1 answer
375 views

Effect of Deadcat frame on performance?

I've seen a lot of new frames with a Deadcat style because it keeps the props out of view for cinematic videos and such. Does the Deadcat shape of frame have any effects on flight performance?
Jacob B's user avatar
  • 5,802