Maiden Flight of Stephen's Long Endurance Hexa Design

Hi folks,

this is my first post here. I was looking for some UAV for mapping and same as Gerard Toonstra came across Stephen Gienow's great "concept design for a long endurance hexa".

And here it is!

I'll post more details within the next weeks.
Here is a video of the maiden flight(s) of this configuration under windy conditions:

Thanks a lot to Stephen for posting this setup and for his help!


Views: 1639

Comment by Thorsten on September 22, 2013 at 8:39am

It seems I solved the problem! No more CCW yaw! The motors/props need to be mounted really straight. I think it is not a problem of the frame but the  motors and the (size of the) props. I will now replace some props trying to increase overall efficiency. 

Comment by Charles Nock on December 3, 2013 at 10:40am

Hi Thorsten,

I am working on a Tarot 690 based build over the winter, are the full specs of your build listed somewhere? I am curious which motors you elected to use. 


Comment by Thorsten on December 3, 2013 at 11:43am


my current build is based on  Stephen Gienow's "concept design for a long endurance hexa". You'll find all details there. The only difference is the batteries and the ESCs. I am using two 6500mAh 4S ones with 20A Flyduino ESCs. Flight time is about 40 min with one camera and about 35 with two cameras.



Comment by Thorsten on December 3, 2013 at 11:49am

PS: the Tarot frame is too heavy for the RCTimer motors and too small for the 15'' props. 

Comment by Charles Nock on December 3, 2013 at 12:44pm

The Tarot frame weighs in at 600 g; I am wondering how much lighter is your frame including equivalent components like landing gear etc?   Indeed it is too small for 15" but I think 14" are possible

Comment by Thorsten on December 4, 2013 at 1:01am

My current mikrokopter frame is about 275g including landing gear. AUW is 2800g with one camera. So for a heavier frame and depending how you attach everything to the frame the AUW will be easily above 3200g. It will fly but throttle at hover will be at 70+%.

Comment by Thorsten on December 4, 2013 at 2:39am

Sorry, wrong number: The frame is about 340g including landing gear.

Comment by Vineet Singh on December 31, 2013 at 8:43am

Hi Thorsten,

I was little pumped up to make a hex copter of my own on the same concept. However, the hexa frame xl that I see on the mikrokopter has arm length of 355 mm. this means 15 inch propeller which are 380 mm cannot be mounted as the prop will foul with each other considering each arm length forms an equilateral triangle. I think Gerrard toonstra used octo arms.

Comment by Stephen Gienow on December 31, 2013 at 11:57am

You are correct Vineet.  This is covered in my original design concept.

Comment by Vineet Singh on January 2, 2014 at 2:31am

Yes Stephen, I got that in your post. But I was a bit confused because Gerrard Toonstra in his blog ( ) has reported frame weight as 574 g while Thorsten has here reported 340 g which can only be achieved with hexa xl arms ( previous comment to mine). If the 15 inch propellers can be accommodated with hexa xl then we are cutting extra precious grams.


You need to be a member of Ecosynth to add comments!

Join Ecosynth


© 2019   Created by Erle Ellis. Content is made available under CC BY 4.0.   Powered by

Badges  |  Report an Issue  |  Terms of Service