Cuddles's blog archive for May, 2008 - RC Groups
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Archive for May, 2008
Posted by Cuddles | May 27, 2008 @ 10:06 AM | 8,320 Views
No maiden flighy yet for my Apogee, miserable weather again. So yesterday evening i've done that wing fillet you can find on almost all Drela projects: he says that, once installed, the plane is noticeably quieter on fast fly-bys, sure a good thing

On my first Apogee that fillet didn't come out as hoped: it was small, rough and rather brittle and was a lot of work too.
After some head scratching i've devised a simple and effective method.
You need some thin foam (1mm) some scrap 36g/mq kevlar, laminating resin and your filler/thickener of choice (i used some chopped fiberglass).

First you need to print the template, (squares are 4mm)cut it and tack on the thin foam. Then you need to cut the foam with a sharp cutter.
You now have this little half-moon of foam, but before to fit and wrap it on the intersection point you need to put some scotch tape on the wing.
You start with two stripes just outside the front locating pins and then some tape between(top and bottom). Take care not to have any wrinkles.
Rub the taped surface with some vaseline and screw the wing to the pod.
Now you can wrap the foam half-moon by tacking with some foam-safe cyano the inner central part to the pod and wrapping the two points under the wing, wedging the very points between the pod and the wing.
You take the kevlar, lightly mist with repositionable spray glue and put on a piece of baking paper.
With some sharp scissors you then cut the kevlar half-moon slightly oversize
(red line as reference), and respray a little and put on the foam half moon.
You then again wedge the points and tack with FS cyano.
Then you make a first small batch to saturate the kevlar, let harden a little and mix a second batch with your filler to the consistency of silicone using this to add some meat to shape.
Once cured you detach the wing,sand to shape using an half circle file and dissolve the foam with a small brush and nitro.
Lots of words but little work actually
Posted by Cuddles | May 22, 2008 @ 09:58 AM | 7,732 Views
Oh boys, there's a lot of work involved in this...
Josť Bruzual of ECM is really not going to make money with this!

I've read tons of threads about composite construction and molding, all the SG threads, JosŤ's thread about his beta version and so on.

So since i wanted badly that Apogee i had to scratchbuild it cause I am a scratchbuilder but if you don't have time...:

Last year i built the beta version wich was flying well but was a bit overweight
(about 135g...145g after lots of crashes)
With the beta under my belt i could see what to improve or to try.
I changed about everything...kevlar pod instead of FG, core materials, glassed depron tailfeathers instead of balsa, V-mount instead of two parts stab and 0,5mm carbon pushrods instead of dyneema and elastic.
And I struggled to achieve those weights wich are far from perfection anyway
Now that is final assembly time i feel very pleased of my work and i feel very confident about results.
I'm looking forward to post some completed photos and maiden shots as well.

...Continue Reading
Posted by Cuddles | May 20, 2008 @ 10:09 AM | 7,278 Views
I've finally maiden my Stradivari, a competition DLG made in Italy by Claudio Zavagno who is the Icefire designer.
Will be my wind plane.
The wing is molded and made of rohacell, main chord is 19mm.
She's a bit on the porky side @ 320g...but the wing is extremely stiff.
I have balanced her on 80mm from LE with 25g of lead but is nose heavy right now.
She likes to fly with her tail raised because of incidences...stab incidence is positive here i need discover her thermal signaling habits

Here is a video:
Posted by Cuddles | May 16, 2008 @ 09:58 AM | 8,344 Views
I was looking for some updated imagery in Google Earth with Panoramio layer on...
While checking the place where i use to spend holidays, i've found myself in a Panoramio photo!
Now that's very odd to me.... but i suppose it can happen
The place is Costa Dorata, in Sardinia while the photo was taken near the small harbour.
Last year my Apogee was really beaten from thorny bushes and granite masses.
Yes...sailin' and soarin' for 3 weeks in this paradise is fantastic