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mc71's blog
Posted by mc71 | Dec 13, 2011 @ 04:45 PM | 1,482 Views
Close to finishing the first iteration of this design. Time for a little rendering fun

Matt
Posted by mc71 | Dec 12, 2011 @ 02:15 PM | 1,616 Views
All new design folding asymmetric quad for AP. Motors are hung up high to clear the props from the field of view.

Motors are DT750's, with a Wii motion plus for gyros, Nunchuck accelerometers for auto stabilisation and an Arduino Nano V3 running Multiwii 1.9

Matt
Posted by mc71 | Oct 09, 2008 @ 01:08 AM | 3,128 Views
I put together a quicky flat plate depron version to test the overall aerodynamic balance of the plane before spending some time and money cutting EPP.

Although it was built over two months ago I've only had 5 flights on it so far. What suprised me the most was how fast the roll rate was and how axial it rolled right from the first flight. The control surfaces are all completely slop free using the hobycity horns and clevis's. The motor and controller were surprisingly excellent (both were about $10 fom hobbycity). The only gripe is that the integral prop adaptor on the motor is too small and the GWS props dont feel like they lock on securely.

I've added a small subfin to help with the knife edge and I might look at some more drastic measures to eliminate the knife edge elevator coupling if I can't get rid of it through CG changes.

Matt
Posted by mc71 | Jun 29, 2008 @ 07:56 AM | 3,758 Views
I've made some more progress on the design, it's pretty close to being final now. The motor and servos have been put into the 3D model so that I cn get accurate CG and weight estimates before we begin cutting foam.

The design has been changed to take advantage of available 10mm EPP sheet. The fuselage is now assembled from three pieces, the main fuselage and the two doublers to stiffen up the motor mount and the rear of the fuselage. I picked up some of those "pool-noodle" boads. It is very resilliant material, about the same thickness of the EPP I plan to use but it's realy cheap, so thats what the first flying prototypes will be constructed from.

The wingspan has been reduced so that it now fits cleanly thrugh a standard door (something important for a plane designed to be flown in the house) and the chord has been increased to maintain the 200sq in wing area target.

Matt
Posted by mc71 | Jun 04, 2008 @ 05:03 AM | 3,643 Views
I got bored and spent a few minutes tweaking the design.

I updated the fuse profile, vertical fin and rudder. The fuse area has been dramatically increased, with plenty forward of the CG to help maintain Knife Edge flight.

Matt
Posted by mc71 | Jun 04, 2008 @ 03:04 AM | 3,518 Views
First blog, (god that sounds painful... )

Just some images of a new EPP front yard flyer I'm working on...This one is 'kinda semi scale Extra--ish'. It's only had two hours on spent on the design so far, so expect it to change a fair bit before it becomes a reality. I'll post as much of the design process as I can so everyone can see it evolve.

Matt