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Old Feb 14, 2012, 01:11 PM
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My 1900mm skywalker showed up today from bevrc. I will post some pictures later today.
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Old Feb 14, 2012, 01:19 PM
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Quote:
Originally Posted by Coyote64 View Post
We will have to agree to disagree Ian. Your saying the high sided fuse of the skywalker doesnt have any difference to the curved aerodymanic shape of the X8 or any other wing ?? Please, put a flat sided object and an egg shaped object in a wind tunnel, which one does the wind pass over the best ?

I dont think your coming across as trying to talk anyone out of the X8, just debating opinions

Dont get me wrong, im not trying to talk anyone into buying either, but for me, the X8 will do everything my walker can, but much better than the walker can at the same time
Your mistake is thinking the wind "blows against" the plane...

The airplane actually does not present itself to be blown against.

A fixed object on the ground the wind can "blow against".... but an airplane in the sky? No.
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Old Feb 14, 2012, 02:35 PM
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Of course the plane presents itself to be blown against. Air hitting it at 90 degrees to its flight patch "hits" and pushes the plane sideways

Extreme crosswind landing-amazing pilot!!! (0 min 59 sec)


See the jet here off the ground, but presenting itself to be blown against. And thats some weight to push. Foamies like the skywalker with its high flat sides stands no chance in cross winds. The more aerodynamic the side profile the lesser effect it has
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Old Feb 14, 2012, 02:57 PM
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Quote:
Originally Posted by galaxiex View Post
Your mistake is thinking the wind "blows against" the plane...

The airplane actually does not present itself to be blown against.

A fixed object on the ground the wind can "blow against".... but an airplane in the sky? No.
yes it does, it's called a crosswind.
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Old Feb 14, 2012, 03:06 PM
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The only time there is wind "blowing against the side" of that plane, is when he kicks the rudder
over hard just before touchdown. The rest of the time the plane is flying dead straight into
the apparent wind (combination of wind vector and its own forward airspeed vector)
which does not match the direction of travel over the ground.

A big flying wing, in the same high crosswind landing would crab at the exact same angle
as the jet above, but would have a much harder time aligning itself with the runway
at time of landing (due to no rudder).

Note there is a distinction between a steady crosswind, and crosswind gusts.
A gust changes the angle of the apparent wind and hits various surfaces (include the fuse)
unevenly. It is true that the Skywalker fuse will see crosswind gusts more than
a wing, but the effect is minimal compared to the effect a gust has on the vertical stab
and what it does to any plane with dihedral or polyhedral (the Skywalker has a lot of effective polyedral).
If the Skywalker had no effective dihedral (a low straight wing, in line with its CG), you'd see very
little effect from crosswind gusts, in spite of the large fat fuse.

Keep in mind, I'm a slope sailplane pilot. We fly in "crosswinds" *all the time*.

ian
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Old Feb 14, 2012, 03:07 PM
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Quote:
Originally Posted by gundamnitpete View Post
yes it does, it's called a crosswind.
No. A "crosswind" is only meaningful when you're trying to line a plane up with
something on the ground. The air flow lines over a plane are always parallel to the fuse
unless you kick it sideways with the rudder.

ian
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Old Feb 14, 2012, 03:56 PM
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Quote:
Originally Posted by Coyote64 View Post
Of course the plane presents itself to be blown against. Air hitting it at 90 degrees to its flight patch "hits" and pushes the plane sideways

http://www.youtube.com/watch?v=jfB4x...eature=related

See the jet here off the ground, but presenting itself to be blown against. And thats some weight to push. Foamies like the skywalker with its high flat sides stands no chance in cross winds. The more aerodynamic the side profile the lesser effect it has
Quote:
Originally Posted by gundamnitpete View Post
yes it does, it's called a crosswind.
Sorry guys but that is just wrong...

Read the book "Stick and Rudder" to get a real understanding of how an airplane really flys... and what really happens when the "wind" blows "against" the airplane.

I will state again... the airplane does NOT present itself to be "blown against" by the wind.

Only objects fixed to the ground can be "blown against" by the wind.

An object in the air is not "fixed' to anything...

It moves WITH the wind.
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Old Feb 14, 2012, 05:07 PM
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Here are some pictures of the new wing. The fuselage looks the same as V5.
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Old Feb 14, 2012, 05:32 PM
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Only the one spar ? I thought they were supposed to be two.

Still, they look pretty good
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Old Feb 14, 2012, 06:41 PM
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Just the one. Nothing embedded either. I plan to glue the two half's together with the CF strips like we do with the original wing.
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Old Feb 15, 2012, 12:25 AM
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I wonder if it's using the same joiner rod as the X8, which is significantly sturdier
than the original Skywalker joiner (no idea how it compares to the V5 joiner).

ian
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Old Feb 15, 2012, 02:41 AM
ScratchCrasher
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Originally Posted by cabster101 View Post
Here are some pictures of the new wing. The fuselage looks the same as V5.
Can you please also post a pic of the end of one wing half, where it is joined with the other wing, looking along the wing? This is to let us get a feel of the airfoil used.
I attach a pic of an earlier version wing to show you what I mean.

Thank you.
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Old Feb 15, 2012, 04:41 AM
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Quote:
Originally Posted by cabster101 View Post
Here are some pictures of the new wing. The fuselage looks the same as V5.
Those pictures say all you need to know. The original SW had a flat bottomed wing. The new one is a drastically different section with undercamber as well as being much larger. Can anyone with an education on wing section comment? Not really my field, but it looks like the new wing will be oriented towards slow flight, lots of lift = big payload for batteries. Much like a loitering for hours kind of wing.
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Old Feb 15, 2012, 04:53 AM
Foam Snow
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Originally Posted by cabster101 View Post
Here are some pictures of the new wing. The fuselage looks the same as V5.
Fantastic pics thanks cabster!! At last we know the facts
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Old Feb 15, 2012, 05:52 AM
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Is the fucelage the same as V5 or have some modifications to accomodate the new wing ?
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