[NSRCA-discussion] a picture for you

[GEORGE KENNIE]

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Hi Guys,

Just thought I'd let everyone know what I've been up to. I'm sure that most everyone thinks of me as the Blucor guy
and I guess that's what I've become.

Well I decided that I would try to go a little further and see what I could do with a little more sophistication and hopefully
somewhat conceal the obvious by a little paint, a little rounding of the corners, a little fairing of the nose section (not easy)
maybe a canalyzer, pants, and a touch of graphics.

As many of you know, it's extremely difficult to make paint stick to the mylar film on this stuff, so I decided I'd do a little 
experimenting. We've been using an RC-56 type adhesive for many of the necessary join operations which really does stick
to this stuff and being a white substance, I decided to mix in some color and see how that would work. Well the first exper-
iment seemed to be pretty effective at 50% of each so I decided to cut back to about 1/3rd glue and that was still not that 
great, but I decided to use that ratio anyway. The thing I noticed about this paint/glue mix was that even after a couple of 
days of drying the thing still felt sticky. If you picked up the plane you couldn't put the buggar down,.....kaaaaah.  I ended
up painting up to a masked line, then painting a different color up to the other side of the tape then pulling the tape and filling
the tape gap with film (monokote).

I decided to try something different as regards the force arrangement. My experience thus far has seemed to indicate that 
stuff with wheel pants (fixed gear) appears to contribute to the dreaded pitch to the belly in K.E. so I decided that I would 
attempt to address the anomoly by placing the engine thrust line below the center line of the wing and act as an up pendulum
force pulling to the canopy.

The cheeks are just plastic spoons. There's one under the chin, open at the front, for additional cooling and the leading edges
have straws, cut in half longitudinally, and glued in place for a constant radius, stab included. The fin is cut as one piece with 
the fuse side, so there's no seam where there would normally be an attachment point. The T-Can, so far, is a press fit so that 
adjustments can be made as needed, but it seems pretty close, as when I hold it in my hand vertically and advance the throttle
it gives the sensation that it wants to hover hands-off. None of my other stuff has done that.

Well it's been done for a while and I've kinda been waiting for a relatively calm day and today was IT, so I ambled off around noon
to the local field for a go.  Did my range check and eye-balled the surfaces one last time b/4 christening this new baby. The 
Soccer field grass was too high for take-off so I advanced the throttle 'til I felt it getting light and gave it a soft toss and it went up
without a hitch. I'd done set-up a few weeks ago so I just flew a few passes to see what trims were going to be required and I 
ended up with one click of aileron (trim step rate set at one) and that was it. I was not able to sense any roll or pitch couple in 
both directions, so I was more than satisfied with that, Buuuuuuuuuuut, for about the first 4 minutes or so I flew this thing very 
slowly. Somewhere right around that time I think I did a loop and coming down the back side of the loop the ailerons began to 
flutter. I made a few more slow passes and tried a Stall Turn. The thing fluttered on the downline with no throttle applied. This 
thing flutters more than a Hummingbird. I'm contemplating putting out some sugar-water for it !!!!!!

Now, I've built lots and lots of foamys and have never had this problem before. What's even more aggravating is that I was very
meticulous about the surface joints on this bird and can see nothing obvious that would differentiate this ship from all those that
have gone before.

The only difference I can think of is that the ailerons on this model are about 1/2 the area of my previous models as I was intending
this plane to have a more precise feel and less of a 3D type craft. Of course the tip fences were not used B/4 and I'm wondering if
theres a build-up of turbulance at the outermost portion of the surface? 
The flutter is a very high rate and if not checked will undoubtedly become destructive.

Any solutions offered will be gratefully received.

Thanks 

Georgie
























































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