Quest for the 100MPH Plane

I feel the need,  the need for speed.  I am currently working on a 100+ MPH HobbyKing radjet.  I am not quite there yet,  but feel I am well on the way.  Here is the current state of things.  Below is a video from FPV Fest where I clocked it at about 75MPH..


How am I going to break 100MPH?  Bigger motors and bigger batteries of course!


First off,  some data (click the chart to open a larger version)...

 The data in orange is what I was running in the video you just watched,  the data in yellow is what I plan on running.  Notice nearly twice the thrust! 


Here is a better comparison of the two options...

Notice a few things...

  • nearly 3 times the amp draw
  • the prop speed is up to 164MPH from 97MPH
  • applying my actual losses I estimate the plane will go 125MPH

 of course, I figure that losses probably are logrithmic not linear, so the diminishing returns from actual losses due to more weight might be a bit more,  however I still feel pretty confident I can break 100.  The batteries are going to take some punishment.  I am going to need to run a 50C 1600MAH with an 80AMP ESC.  Stay Tuned!


CSIT-211 Final Project.

For my Final Project in CSIT-211 (Group Project),  I decided to implement my version of the classic game "Snake".  The snake uses Linked Queues to track the positions of all the snake segments, and uses a linear search for collision detection.  For more information, please download the .zip which contains the Theory of Operation paper as well as the power point and the code itself.


Click here for a .zip containing the compiled .jar, as well as the source and documentation.


Java Graphics & Input polling based on:


Camera mount for the ZMR-250

The sony mini FPV cameras are great, but they are difficult to mount.  I have designed a 3D printable mount to fit the ZMR-250 blackout clone quadcopter.


The design can be downloaded from thingiverse here..

You can shoot from a straight forward mount to a tilt mount from 0-30 degrees in 5 degree increments based upon your racing preferences.  I am going to start with 15degrees and see how well that works for me.

These are the cameras I am currently using.

Here are some photos of the 15degree up tilt design..



2014 Flying Retrospective

Sorry I haven't been terribly active in 2014,  I've been doing a lot building and flying and less documenting my projects.  Here is a video I made which is a retrospective for 2014 of what I have been up to with my group of friends who all fly together...



Building a Travel Quad.

I am on the quest for the Holy Grail, or at least my version of it.  I am looking to visit some friends in Hawaii sometime next year and I am looking for the perfect drone to take with me to capture video of some of the more scenic areas there.   My requirements are as follows...

  • Must be as small as possible for travel
  • Must get decent battery life (10mins is the goal)
  • Must be able to carry a Go-Pro camera
  • Must have smooth video
  • Must be stable in the air and fly well

This quad which I have named the "Aloha Quad" aims to fit that bill.  It is based on the Flite-Test rotorbones knuckles which I have outfitted with my own custom modifications.

To reduce vibration,  I will use the necessary evil (Weight) that I must carry to my advantage.  There is no getting around it,  I must carry a battery, camera, flight electronics, etc, but where I choose to place them might work to help eliminate vibration.

Taking a cue from the QAV 500, it seems that having a vibrationally "dirty" section where your motors, and props are isolated from the "clean" section where the electronics and camera reside might offer the best solution.

Here I present the first version RevA

OK, so what's going on here?  First I created a plate out of acrylic which I cut on the laser cutter down at Baltimore Hackerspace.  The idea is the plate will carry the weight of everything I can mount on to it which will provide inertial resistance.

This plate will be isolated from the rest of the frame using vibration dampeners.  I have a variety of different hardness dampeners to experiment with to determine which offers the best solution...

Ultimately this design failed.  As it turns out, the CG was too high which caused the drone to become quite unstable in flight.  See the following video for an example.


My idea to correct this is to relocate the plate to the bottom.  I am still putting the finishing touches on the design, once I have it finished, I will update my progress on this page.  Here is a render of what I have so far....