MkII H frame quad now flying.
Frame weighs about 60g less than Mk1 with much more room and accessibility to the nose sections. The arm O rings mounts are more firm than the Mk1 but vibration levels about the same. All RAW x,y,z accel vib about +- 1.5. Its possible to fly without reversed motors but the YAW rate is still much better with them reversed. As the arms are enclosed there is no problem if an O ring brakes and it has been flown with two missing on the same side.
I am now working on an internal nose gopro gimbal.
Comment by eduardo on March 5, 2013 at 8:30am very nice design
Comment by Vince Hogg on March 5, 2013 at 8:37am 
Very interesting design! Way to think outside the box. Or, inside the box, or... whatever. ;)
That is very different. A+ for originality.
To be sure your arm mounting could use some tweaking but like all things different, the solution will make itself clear soon enough.
I think integrated molded vehicles will eventually replace the 'plate and tube' types. Improvements in our fabrication process will get us there. The basis for such already exists. We just need to find the easiest and fastest way to mold, trim, and integrate assembly of parts.
Outstanding effort!
-=Doug
Comment by Drone Savant on March 5, 2013 at 9:41am That is great! are you planning to distribute these or is this just your personal craft? Is there detail in some sort of buildlog?
Comment by Antonie Kruger on March 5, 2013 at 9:44am She is big and a beaut - I love it. The space is awesome. Like a C130 with rotors. I like the look. Did you vacuum bag it around a foam core. How did you do the shape?
Good job. Do you see an drag effect, wind effect?
Antonie
Comment by Leo Hogg on March 5, 2013 at 11:02am The fuselage shell was vacuum bagged around a foam core. The foam was then dug out after the fuselage lid was cut off. The wind effect was similar to the X-frame. We were considering mounting the ESCs on the inside with heatsinks to keep it streamlined, but we considered against it because of RF noise and cooling.
Comment by Eli Cohen on March 5, 2013 at 11:03am I can't imagine this is the lightest configuration... what does creating a shell buy you? even a half inch sq CF tube should be adequate to tie everything together and you can still do a fair amount of vibe reduction. what were the drivers behind creating this fairing?
Comment by Peter Meister on March 5, 2013 at 11:17am Vince,
Awesome design for the fuselage, I really really like it. Well done!
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