Murray Spoelstra
  • Male
  • Pretoria, Gauteng
  • South Africa
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Latest Activity

Murray Spoelstra replied to Tew Jing An's discussion Budget folding frame for quadcopter
"Thanks Steve, I found that size is able to deal well with typical wind conditions and allows for the large silent props. Still fits in smallish toolbox with controller etc. Selling kits not on my agenda. Would be cheap kits and need large orders to…"
Jul 5
Murray Spoelstra replied to Tew Jing An's discussion Budget folding frame for quadcopter
Jul 5
Glenn Hollowell commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"Yep, I remember and like the 1/2 pool noodle crash plate on the bottom. I have a section of ABS septic line under both ends of my fuselage that I reshaped with a heat gun as landing gear. Springy and unbreakable. Thanks for the response."
Feb 5
Murray Spoelstra commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"Hi Glenn, I haven't changed the design since 2013. It is still in the config as shown on page 12 of this blog. This config is better than the original, because it protects the battery and the half-pool noodle at the bottom gives extra crash…"
Feb 4
Glenn Hollowell commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"Hey, great to hear from you! You are precisely correct w/regards to getting the compass away from electronics/metal to reduce interference. Murray, what are you flying now? I've got a couple of variants of your design on my drawing board now.…"
Feb 2
Murray Spoelstra commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"To Glenn, thanks for the picture, I think it looks great!! I'm curious whether the GPS/Compass? on the pedestal helps to prevent compass drift on long distance auto flights? As I mentioned before, it normally can tend to drift when flying in a…"
Feb 1
Murray Spoelstra commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"First to Zaozhi Gao: Sorry, but somehow I only see your great build now after more than 3 years! Well done, hope you could get your center of gravity sorted and kept the weight down."
Feb 1
Glenn Hollowell commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"Great design with lots of possibilities. Here is my take with white oak, 1/8" aluminum, epoxy and pool noodles. All up wt w/5000mah4s is 2,150g. Have a nice day."
Mar 29, 2018
Si Thu Htaik commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"I am very interest this frame ,wanna setup myself or get existing if available.  "
Jan 6, 2016
Zhaozhi Gao commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"Thanks for sharing such a great build. I have not completed mine yet. But I want to share with you my project based on your design. http://www.thingiverse.com/thing:834267"
Oct 12, 2015
Murray Spoelstra commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"I use center board 198 x 76.2mm to allow for some manufacturing tolerances. Arms lengths are 258mm. On page 12 of this blog you can see more dimensions on drawing done by mdrm. Also picture of the current configuration I am still flying of this…"
Apr 11, 2015
jadwin edison commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"what size of the center board between front and rear ?how long for the arms on the rear and Front ?"Thankyou"
Apr 8, 2015
Nicholas du Toit left a comment for Murray Spoelstra
"Hi Murray, I am new to Multicopters or indeed any type of radio controlled vehicle, but i have developed a keep interest into Multicopters. It just so happens that i am also from Pretoria. I've been looking around but can't seem to locate…"
Apr 10, 2014
Murray Spoelstra commented on Dennis Okeefe's blog post Using my APM as a data logger for a dragster....
"We did something similar recently building a data logger for aircraft.Have a look at http://diydrones.com/profiles/blogs/apm-as-a-flight-data-recorder In short, if you want to log data onboard for extended periods, get a Pixhawk. We also learned a…"
Mar 19, 2014
Kai Gonet commented on Murray Spoelstra's blog post APM as a flight data recorder
"@ AndrewTridgell or other PX4FMU user did anyone of you used the Pixhawk as a stand alone datalogger? Thanks"
Feb 14, 2014
Stephen Gloor commented on Murray Spoelstra's blog post APM as a flight data recorder
"Pixhawk sounds like the easiest plan."
Feb 12, 2014

Profile Information

About Me:
Consulting Aeronautical Engineer with 2year old twin boys
Please tell us a bit about your UAV interest
Interesting hobby with ability to create fun aerial footage
Hometown:
Pretoria

Murray Spoelstra's Blog

APM as a flight data recorder

Posted on February 11, 2014 at 1:00am 23 Comments

We tried using an APM 2.5 as a flight data recorder in a Cessna 208B. It was built into a 3D printed box with own power supply and recording done on a mobile phone.

There is one problem though: When the aircraft is in a steady bank the APM HUD indicates horizontal attitude as the resultant g-load is downwards relative to the APM. The difference between APM indicated…

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Folding Quadcopter for the holidays

Posted on December 20, 2012 at 8:23am 156 Comments



Not much space if you're going on holiday with the family in a Renault Clio. This design fits into a 52cm toolbox with transmitter and all accessories.…

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Comment Wall (5 comments)

At 12:07am on November 26, 2013, Malan Silva said…

Hi Murray, I am a newbie to multirotor stuff. I was wondering if I could buy a frame kit of your folding quad.-Malan 

At 7:39am on November 26, 2013, Murray Spoelstra said…

Hi Malan,

I might be able to put something together. Is it for 15" props? And with the electronics box, foam underneath and removable camera mount?

At 11:33am on November 26, 2013, Malan Silva said…
Hi Murray, 
Thank you! I have a turnigy talon V2 set-up with extended booms (14mm X 320mm), 360kv RC timer motors, and 17.5" props. This set-up although flies longer than 30mins is a pain to transport.
I was hoping to transfer these components to your frame. 
It'll be great if you can make the center plates for me scaled so that there is space to fit hobbyking quattro ESC (70X70mm) between the middle booms. Can you please make that for me? PM me with your details so I can paypal you. 

At 1:29am on December 5, 2013, Murray Spoelstra said…

Hi Malan,

Sorry, I'm a bit busy with year-end rush at the moment, but would still want to help you. My estimate is that I could have it done by around the 16th Dec. It will be with 70mm between middle tubes, but for the motor arms you have two options: 12mm square Aluminium tubes or 10mm carbon tubes with 12mm squares at ends.

Let me know what you prefer. I'm thinking of building one for myself with 17.5" props.

I estimate the cost will be $100 max.

At 9:45am on April 10, 2014, Nicholas du Toit said…

Hi Murray,

I am new to Multicopters or indeed any type of radio controlled vehicle, but i have developed a keep interest into Multicopters. It just so happens that i am also from Pretoria.

I've been looking around but can't seem to locate a store which sells parts locally. Could you please give me the name of the store or website you source from? It really would be a great help

Thank you

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