Good day to all members
We are a group of mechanical engineering students from Newcastle University International Singapore doing our Final year project on Quadrotor.
Our project requirements
- a 3 kg Hybrid Quadrotor
- the hybrid part is to swap between crash cage of 10 m and terrestrial drive to save 50% of the battery use
- which is able carry additional 3kg of payload
- maximum distance between propeller tip is 1 m
- minimum fight time is 15 min
Do visit us at http://newcastlequadcopter.blogspot.sg/
Right about now we understand that we have to jump start our selection of parts by
1. estimating the overall weight, propeller speed and diameter
2. using power equations from Abbott equation or Bob Boucher's electric motor handbook equation
3. relate it with propeller momentum theory
4. using the propeller coefficients
5. choosing battery that can give a flight time of 15min
So people the questions will be
a) is there other methods rather than "guessing" the propeller speed and size?
b) are there power equations you all have tried and proven correct or even trying out your own equation?
c) Which of these 2 equation on Momentum Theory about propeller is the correct one? Please explain.
Personally I think this project was a bit ambitious given the weight, payload and flight. We did some draft calculation and had tried using the famous xcopterCalc - Multicopter Calculator; it seem like we cannot even get it to fly.
4 x motor 1.2 kg
2 x battery 1.6 kg
We like to call out to everyone and anyone there who are more experience, interested and kind in this forum to provide us with your ideas and advice.
Thank and Regards