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Archive for December, 2010
Posted by GoatZilla | Dec 13, 2010 @ 09:33 PM | 7,146 Views
Took my Stryker out for its first flight with the GoPro HD Hero yesterday. The camera was originally purchased for scuba use, but I figured I might as well throw it on a plane as well since it's only 3.3oz and takes pretty good video.

I should really retire this Stryker (it's still my first Stryker frame), but its replacement isn't built yet so it's still going to get some action. This plane is all about the no-frills-get-the-job-done approach.





A couple of still frames from the 1080p video:

...Continue Reading
Posted by GoatZilla | Dec 03, 2010 @ 10:17 PM | 8,731 Views
I've come to the realization that what I've been intuitively experiencing is a real phenomenon as opposed to my imagination, and not only that, but it's a fact that's been overlooked by RC modelers for a very long time.

I've been maintaining a light built flying wing, like a Stryker, is a perfectly good plane for a beginner. Conversely, the conventional "trainer" designs (that is, anything labeled as "trainer") are actually garbage.

Usually the first two counter-arguments are "you need to have dihedral or be high wing for [insert some vague notion of centering]". This is because most of these trainers at least have a high-wing design, and some also have a dihedral/polyhedral.

But a light Stryker seems to be pretty stable and has something similar to this [vague notion of centering] without being high-wing or having a dihedral. What's going on?

As it turns out, if you spend 5 minutes looking at "dihedral effect", you'll find that it affects the "sideslip" of a wing. And you'll find that many other factors affect this same thing...

... including wing sweep (backward).

So assuming similar wing loadings, which plane would you rather hand to a beginner? It's important that beginners actually get out and get stick time. Well, what grounds beginners more than anything else?

Wind.

What design presents more problems in wind? A plane with a dihedral in the wings and a big clunky fuselage hanging under it, along with a...Continue Reading