Iris Details: #2 Injection molded arms and Legs


Here are some close-ups of the arms and legs. They are made from DuPont Zytel®, very strong and resilient in a wide range of temperatures.

Guillermo had some break force testing done, the results were impressive:

In the center it takes 204 lb (92.5 kg),  and at the tip  772 lb  (350 kg).

Sliding dovetail and set-screw retains the legs, allowing for easy replacement if needed. Picatinny rail mounting system integrated into the bottom of the arms provides endless mounting options for accessories. 

Motor wires are protected, but not buried. Quick release clips keep things tidy.

Views: 4389

Comment by Alexsey Novik on August 23, 2013 at 1:15pm


Seems like legs are DJI compatible? 

Comment by Jack Crossfire on August 23, 2013 at 1:27pm

Plastic is always going to put carbon fiber out of business, once the volume of manufacturing is high enough to justify the molding.

Comment by Stephen Zidek on August 23, 2013 at 1:32pm

Very polished and professional looking.  Is that a new prop mounting system I spy?  I say that because I spy no collet.

Where do the motor wires go, through that channel on the underside?  

Comment by Joshua Ott on August 23, 2013 at 2:40pm


No these are not compatible with the DJI products.


We are using these prop mounts because they are lighter and run true. 

Comment by Evgeniy on August 23, 2013 at 3:11pm

ledges on the bottom of the beam is not added strength but increase the weight

Comment by Joshua Ott on August 23, 2013 at 3:50pm


The ridges on the bottom of the arm are part of the quick release rail system, they are not there to increase strength.

Comment by Earl on August 23, 2013 at 3:58pm

Is the body and arms going to be available for us that have APM's and would like a snazzy body ?


Comment by mP1 on August 23, 2013 at 8:19pm

Do they come with a place to insert some anti vibration material under the motors ?

Comment by Dany Thivierge on August 23, 2013 at 9:58pm

Sad that they limit up to use "small" motors... would have be cool to have more mounting options. 

How do they react on tip crash (with a motor inserted)?  do they protect the motor enough to save a bent shaft or do they deform enough to still break the motors?  

I am asking because if the shell around the motor is just for look we need to know, they will also maybe affect motor temperature... 


Comment by Joshua Ott on August 23, 2013 at 10:55pm


Alan designed the arms specifically to protect the motors, cooling air flow was definitely taken into account with the design. I have personally crashed Iris on more than one occasion. I broke a prop or two, and a leg one time, all easily replaced. We have a test mule that has been through a lot of abuse including a drop onto pavement from around 7 meters up. It is still flying today, after about only ten minutes of replacing parts!


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