Making the wings + attachment?

We finished the fuselage spine (and we cut a few more holes in it to allow for cable management). We've been working on some foam nosecones and underbody to take the landing, but unfortunately a certain someone made a right mess of it. Anyhows, we'll probably be evolving it into an acrylic nosecone for a FPV camera mounting.

As far as the wings ar concerned, the most of the wing ribs have been completed, shaped and sanded to size, but we've still to add weight-saving holes and a hole for the carbon spar to go through. After that it's a case of putting them on the spar and skinning it with some 2mm twinwall. Once that's done, we have the nightmare of attaching it to the fuselage, a problem presented due to the lack of foresight on my part. I was initially hoping for some kind of removable wing attachment, but that dream is long gone...

After that, we've to sort out the control surfaces, and I've got a pretty good of how the ailerons are going to work, as well as the elevators. We've also acquired some new hardware, as our previous electronics were, well, a bit cheap (and they definitely won't be able to cope with the bigger airframe).

Nearly there...

We had all the parts. The equipment was set, and we ventured onto the nearest patch of grass, only to be beset by the fact that after a horrific nosedive after a self launch, it was discovered the antenna had in fact snapped. By the time we had soldered everything back together, there was no more time - and thus, for the second time, we were cheated of our promised maiden flight.

The good news is that the pre-flight checks looked promising. The ESC that arrived needed some modifications before it was fully functional, as we had to replace the seemingly faulty push switch (and it didn't behave as we expected either) with a SPST toggle switch. The battery also had to be modified, as I had to split the power supply (not sure if this is an altogether acceptable thing to do) to power both the receiver and the ESC, but after that, the prop worked wonders, spinning furiously (and at one point coming off and nearly taking someone's eye out), and the elevons responded nicely. The centre of gravity seems to be in the right place, but the motor is a bit loose (but the line of thrust is correct, as we see it).

The maiden flight will have to wait until after the holidays unfortunately, but we will begin phase 2 in January as well (hopefully), after we get the results from flying with the mugi.

The final part

The ESC arrived yesterday, completing the puzzle needed to finish the project. We had to solder in some home-made connections to due esc having a battery connector from Hong Kong that did not fit, and the fact that with only one battery, we had to split the power supply (obviously this would result in reduced flight time, but we hope to obtain another battery soon) - but in the end, it all fitted together nicely.

We were rather surprised by the power of the motor, after its feeble performance a few hours earlier. We did some electronics test, and the servos and the esc worked as they should - the servo jitter is still a nagging problem, but we don't exactly know how to fix it yet.

We were about to launch it for its final test flight, before the battery gave up on us (though checking the centre of gravity and the general aerofoil shape, everything should progress smoothly. Hopefully the battery will be ready to go tomorrow after some charging, and after I fix the slightly off-centred elevon, the Mugi should work like a dream.

Clevis fix

I managed to remember to bring in the clevis today, and after breaking yet another one, we managed to replace the old broken one, thus restoring good control and balance, and synchronisation to the elevons. Now all we need is the ESC, with which we can do some test flights and establish a good aerofoil for the Phase 2 aircraft.