| #1 Nick_P
||Aug 05, 2012 08:17 PM
Lets Build a DIY FPV Spider Quad Together
Let me present the Let’s Build series of video tutorials. These videos chronicle my small journey as I build, redesign, build, fly, and FPV a Spider Quad.
A small introduction may or may not be necessary, but here is mine. My name is Nick, and I am currently a middle-aged, college engineering student. I have completed the first two years of coursework, and as a reward for doing oh so well, I decided to get back into radio controlled flight. A few months of research later, and multi-rotor FPV was my chosen reward. The DIY aspect of both FPV and multi-rotors drew my attention. I could also appreciate the need to research each hobby individually as they are both semi complex for the beginner. I dove into FPV first. I felt FPV would be the biggest challenge and wanted a working system that could be transferred into a multi-rotor platform.
After reading multiple threads on the different frequencies a person could utilize and on the down falls of each, I came to a very easy conclusion. I wanted to use 2.4ghz control and 5.8ghz video. I understood the range issue and predicted brown outs that have become associated with 2.4ghz control; however, I planned to use the Turnigy 9x with a Frsky module. The reports I had read all indicated this was a solid control setup for a small amount of coin. The Turnigy/Frksy combo without amplifier was giving ranges in the miles.
After locking in on a control system, I decided to look into HobbyKing’s new 5.8ghz setup. For less than a night out with the wife, I could purchase a 5.8ghz transmitter and receiver. I spent a few nights reading as much as there was on the 5.8 system. Reports ranged from excellent to awful. The majority of complaints were dedicated to range and the channel selection. These issues seemed to be remedied by reading the fawking manual and by building circular polarized antennas. IB_Crazy has created two excellent tutorials on building antennas for all frequencies using circular polarized techniques. Using these antennas truly opened the door to high performance video on 5.8ghz without a high price.
With video transmission out of the way, I needed to find a suitable camera and viewing device. I spent more time reading about cameras than anything else. I did not want a horrible view that could potentially turn me off FPV. I watched countless videos of live outs, trying to find the best camera. This all lead me to a remarkable discovery; the TBS69 had a live out so crisp and clean it looked HD. However, I was not willing to spend $170.00 for a board camera. I ended up settling on the next best camera; the Sony 600tvl ccd from Securitycam2000.
For full immersion, I went with a set of Fatshark Base goggles, and the goggles have proven to be worth every penny spent on them. I ended up modding the goggles to include a 5.8ghz receiver, which gives me the freedom of not being tied to a ground station.
When I started researching multi-rotors, I was blasted with large amounts of information that at the time did not make any sense. I should note that all the information needed to get started with multi-rotors is available; it just did not seem to be available in a single package. The Megalink Archive is a great resource once you understand what you need to know, but for someone just arriving at the info landfill, I can understand how a newbie could be overwhelmed with knowledge.
I waded through the data and tried to develop a parts list along the way. I looked for setups people ran reliably and made note of the different motor/esc/battery combos they ran. I started to get an understanding about the relationships of mass, motor size, kv, and prop size. I ran into a lot of opinion presented as fact, but in the end, I was comfortable enough to pick a control board, motor, esc, and frame.
I built a small quad to start using a KK board from Hobbyking, along with Emaxx 2822 motors spinning 8x4.5 props powered by F-30a SimonK flashed esc getting juice from geforce 2200mah 3s lipo. All up mass including FPV gear was 800grams. I learned to fly LOS and FPV on this tiny quad. I crashed it more times than I can count, and I went through at least $100.00 in props.
Now that I have my feet wet, I would like to build a larger more powerful ship. I especially enjoy the looks of spider quads; therefore, I drew a design in Solidworks and created a Spider Quad for myself.
What I have done is document the build process as well as outline the parts I selected. My goal is to possibly shed some light on what can feel like an overwhelming task. I have created a series of videos that documents my process, includes commentary, and takes you from beginning to flying FPV. I will include a downloadable packet that contains all the drawing needed to copy and build this quad. I invite whomever decides to follow along and build one for themselves. I would love to see the progress made and hope to answer any questions that may come up. I would also be open to design changes and suggestions.
Without further ado let me present the Lets Build video series. Below are a set of links that include a downloadable packet containing the plans and parts list as well as links to the videos of the build.