Construction and set-up manual released

-
The set-up manual is finished (you'll find it at the top right of this blog). I tried to address all potential questions & difficulties, but I am sure I missed some. The manual will be improved when I get some feedback from you.

Comments

  1. Anonymous15 December 2009 at 18:06

    Looks excellent - I have bought the parts and will be building during the Christmas Holiday. I will let you know how I get on.

    I would like to use an ATMega32 that I have already - if I change the def file name is the software likely to compile and work ok?

    regards Peter

    ReplyDelete
  2. William Th.15 December 2009 at 19:31

    Hi Peter,
    you can most likely use an Atmega32, but I would nevertheless recommend an arduino mini pro. It's cheap, small, light and handy. I assume that you know how to change the circuit and that you have Bascom + an ISP programmer? Because otherwise it will be complicated for you if I release new firmware.
    So my recommendation is: Pay some 14 Euros extra and get an Arduino.

    ReplyDelete
  3. Anonymous16 December 2009 at 16:13

    Thanks William.

    I have built a number of projects using processors from an ATMega16 to a 644P and BASCOM so I would not have any probelms (I hope) replacing the Arduino with a processor, crystal, etc. and programming using the ISP port.

    regards Peter

    ReplyDelete
  4. Anonymous17 December 2009 at 00:50

    dalla svizzera LUGANO

    Grazie william per il set-up manual lo aspettavo con inpazienza molto ben descritto
    la costruzione del cubbo.
    ciao e scusa per litaliano.

    ReplyDelete

Post a Comment

Popular posts from this blog

Part 1/3: Side Force Generators (SFGs) in FPV Racing

-
Image
Summary: FPV racing multirotors with side force generators (SFGs), will drift less during turns, making them potentially faster on race tracks (watch the video comparison here). But the SFGs need the be carefully placed and dimensioned, so that aerodynamic centre and centre of mass are at the same position. Otherwise it will not work. 
Introduction Recently, I was thinking about how to improve the handling of racing copters. I noticed since quite a long time, that different copters behave quite differently in fast turns: Some drift quite a lot (especially when they carry a larger battery or an action cam), others drift less. I was always preferring copters that drift as little as  possible. That is also why I am trying to reduce the weight of my copters as much as feasible.
The amount of drift depends on the weight of the copter and the lift and drag of the fuselage for sideways air streams (side-slip). The larger the lift and drag, the more side force the fuselage produces at a given…
Read more

In-flight propulsion system test!

-
Image
Idea Ever wondered what propeller or what motor performs best for your needs? Here is a simple way to determine the performance of different propellers (or motors) directly in flight, using your multirotor, the blackbox and some math. In the past, a lot of static thrust tests have been done to determine the current, thrust and efficiency of multirotor propulsion systems. However, they don't tell you anything about the propeller or motor performance in fast forward flight. Aerodynamics in forward flight and with a non-uniform inflow of the air are very different from static measurements.
My questions were:
What propeller has the better acceleration?(acceleration performance of propellers is theoretically closely linked to the 'grip' during turns. Because turning is also just an acceleration, see this post)What propeller will reach the higher top speed? And which one decelerates better when throttle is cut?

Method My idea was to mount one kind of propellers on the left side…
Read more

Part 2/3: Side force generators - Forces and turning

-
Image
About a month ago, I was presenting an idea to make drones faster on race tracks: The so called ‘side force generators’ (SFGs) enable racing drones to drift less during turns, making them potentially faster. The placement of the ‘wings’ is very critical and mentioned in more detail in my earlier post on SFGs. Some people tested the SFGs and confirmed the enhanced flight characteristics. Other people didn’t try and didn’t believe that SFGs could help. I must agree that the concept of the SFGs is not so easy to understand. That is why I will explain it in more detail here.



Let’s start with something that everyone knows (figure 1). When you are going through a fast turn with your car, then your car needs to provide two forces to stay on the track (grey line): The ‘thrust’ (green) of your car needs to equal its aerodynamic and friction drag (yellow). When the car turns, then there needs to be a constant force towards the centre of the turn, called ‘centripetal force’ (red). This force is …
Read more

Aerodynamics in racing multirotors!

-
Image
Why future racing copters really should look different. by Dr. William Thielicke aka Willa aka Shrediquette
ABSTRACT In this article I try to demonstrate why FPV racing multirotors need to look different. Some small modifications to the frame would (in theory…!) result in 70 % higher top speed! All that needs to be done is to align the arms parallel to the propeller flow, and to tilt the main body of the copter by about 40 degrees. I am presenting a very simple and robust racing copter design that incorporates these ideas. Furthermore, I am calculating the aerodynamic drag of different copter concepts using basic equations. The aim of this article is to make you realize the importance of aerodynamics and to stimulate people to design more innovative racing frames.
INTRODUCTION Until recently, multirotors were mainly used as a “hovering device” and the top speed of these copters did hardly matter. Now, multirotor racing has become popular and all competitors are seeking for very fast…
Read more

Aerodynamics in racing multirotors! Part 2.

-
Image
Introduction In part 1 of this article on multirotor aerodynamics, some ideas on how to reduce the aerodynamic drag of racing multirotors was presented. I was also designing a tilted-body racing quadrotor called "Shrediquette DERBE". There were not yet any flow measurements of multirotors flying at high speeds. Therefore, I had to make quite a number of assumptions on the aerodynamics of a racing copter. This time, I am presenting some flow measurements, along with some potential optimizations for the next version of the "Shrediquette DERBE"
Methods Recently, I had the opportunity to do some flow visualizations in a large wind tunnel at the Bremen university of Applied Sciences / Dept. of biomimetics (which is the place where I worked one year ago). I brought the Shrediquette DERBE and mounted it inside the wind tunnel. Prior to the measurements, I did some tests to determine a realistic flight speed and the appropriate pitch angle.
The measurements were performed…
Read more