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.

Views: 11745

Comment by Noth666 on March 5, 2013 at 8:26am
Nice frame! Whats the frame empty weight on this?
Comment by eduardo on March 5, 2013 at 8:30am

very nice design

Comment by Vince Hogg on March 5, 2013 at 8:37am

Thats with a 75g ali block for APM mount which I have now reduced to 42g. No tubes or motors, just the body.


Developer
Comment by Rob_Lefebvre on March 5, 2013 at 8:39am

Very interesting design!  Way to think outside the box.  Or, inside the box, or... whatever. ;)

Comment by R. D. Starwalt on March 5, 2013 at 9:10am

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 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!

Comment by Antonie Kruger on March 5, 2013 at 11:34am

Hi Leo, would you mind sharing some fuselage dimensions. Have you had a look at the vibration in the APM logs - is it worth the effort?

How is the mapping twin boom carbon drone coming along. Have you started mapping yet?

 

Antonie

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