How to Launch a 15-Pound UAV: Air Pressure or Bungee?

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Discussion Overview

The discussion revolves around methods for launching a 15-pound UAV, specifically comparing air pressure launching to bungee launching. Participants explore the feasibility, requirements, and complexities of each method, as well as the necessary launch speed and thrust for the UAV.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions whether air pressure launching is superior to bungee launching and seeks alternative ideas.
  • Another participant inquires about the required speed for the UAV to achieve flight and its thrust capabilities.
  • A participant notes the drawback of compressed air requiring a compressor or manual pumping, suggesting that bungee launching may be simpler and less complex to set up.
  • There is mention of a target launch speed of around 35 knots (65 km/hr) and a force of about 9g, with a participant expressing confusion over the ease of air pumping compared to setting up a bungee launch.
  • A question is raised regarding whether the UAV will be a glider or if it will have an onboard power supply.

Areas of Agreement / Disagreement

Participants express differing views on the practicality and complexity of air pressure versus bungee launching, indicating that there is no consensus on the best method. The discussion remains unresolved regarding the optimal launching technique.

Contextual Notes

Participants have not fully addressed the assumptions regarding the UAV's design and operational requirements, such as the specific thrust needed for flight and the implications of using compressed air versus bungee launching.

nomorevishnu
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Launching a UAV...

Hey guys...

Can someone help me to come up with some ideas on how to launch a UAV...

Is air pressure launching a better idea than bungee launch?

The aircraft weighs around 15 pounds. Is there a better idea?

If its pressure launched...woudnt it be air that's used as the gas??

I m totally at sea...
 
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How fast does the UAV need to be going to fly and how much thrust does it have?
 
The drawback to compressed air is that you need something to do the compression. That means either man power to operate a hand pump of somekind and low pressures, or a compressor that can do high pressures.

Depending on how many times you would launch it, you could look into compressed air bottles from an industrial gas supplier. Honeslty the bungee/slingshot is the easiest in terms of set up and lowest complexity.
 
We are looking at a launch speed of around 35 knotts(65km/hr) at about 9g...

And isn't pumpin air an easier job than tyin a bungee some 90 meters away??

i m confused...atleast can u guys provide me some links that'd help me?

thnx!
 
Is this going to be a glider or does it have some sort of on board power supply
 

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