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Z4K
03-27-2006, 03:13 AM
<span class="ev_code_YELLOW">Name this plane</span>

No, it's not a "recognise the plane and quote the name" thread. Instead I want the creative and inspired people on these boards to give my flying machine a name. It needs one under which to be entered in a competition. Last year I was stuck with "Hand-built hang-glider". Alliterative hyphenations aside, it was pretty uninspiring. I just need something less lame. Even something like "Zero-X" would do (in one of the Thunderbirds, Zero-X flew to Mars. Apparently that made an indelible impression on me).

Here are some CG images of roughly how it'll look:

http://www.5images.com/uploads/9acbf8c901.jpg
-
http://www.5images.com/uploads/5bfb46e5ab.jpg
-
http://www.5images.com/uploads/8d45467f4f.jpg


And here are some piccies of last year:

http://www.5images.com/uploads/e6e45e082d.jpg
-
http://www.5images.com/uploads/e49a251bc5.jpg
-
http://www.5images.com/uploads/325e0adb8d.jpg

Similar style, though the construction philosophy is quite different. The most obvious change is that the wing skin is now sailcloth, instead of clear (un-shrunk, there's a long and fairly unfunny story about that) heat-shrink PVC plastic. The spar's carbon-fibre reinforced styrofoam. Ribs are aluminium alloy (probably 6061-T6, depends what the supplier has and for how much).

Otherwise it's quite similar(-ish) to the pedal-powered Gossamer Condor (ie. light, fragile, lots of ribs - though much smaller span and not pedal-powered).


I owe a lot of my success (failure?) last year to these boards. In this (http://forums.ubi.com/eve/forums/a/tpc/f/23110283/m/950105605/r/950105605#950105605) thread Diomedes33 hooked me up with some syntax for Octave which provided invaluable data. It's a shame the pictures in the thread have been lost to the ether of free image hosting. I should re-upload them.


Possibile seeds for names include:
<span class="ev_code_YELLOW">*:</span> The fact that it's an (the only, I think) Australian entry (the competition is in Bognor Regis, England).;
<span class="ev_code_YELLOW">*:</span> Some play on Gossamer Condor/Albatross/Penguin (Gossamer Emu? );
<span class="ev_code_YELLOW">*:</span> Colours. Likely to be black and yellow, though for the sake of a good name I'd change that (until this weekend when I get the material). Maybe "Bee Brave"?;
<span class="ev_code_YELLOW">*:</span> The fact it was made in my loungeroom;
<span class="ev_code_YELLOW">*:</span> As the competition flights are over (into) water (the Channel), something water-related;
<span class="ev_code_YELLOW">*:</span> Something completely different. Possibly something unpoetic and unfunny like the Howard Hughes style: "H-4". Or in my case, "Z-2".



If anyone wants to know, the competition has a site: http://www.birdman.org.uk/

============================

<span class="ev_code_YELLOW">On a somewhat related note:</span>


Has anyone had any experience using XFoil? Its output is graphs like:

http://www.5images.com/uploads/9bfc396b17.jpg
Hah! Look at the pitching moment on that baby - I must have been mad even to think about it...

What's the third panel about? It looks like two graphs on the one scale. One (Is it cl/xtr, or cl/c?) seems to locate the transition point on the chord. I can't see what the other one is. Separation?

gorillasika
03-27-2006, 04:54 AM
W-OZ'UP (Water Orbiting Zooming Uplift Plane)

Good luck on your venture http://forums.ubi.com/images/smilies/25.gif

jimDG
03-27-2006, 05:39 AM
Kaver

F19_Orheim
03-27-2006, 05:45 AM
Ikaros?

Capt.LoneRanger
03-27-2006, 05:55 AM
Pilot-Killer?

Or better:

Engineered Darvinism http://forums.ubi.com/images/smilies/784.gif

F19_Olli72
03-27-2006, 05:59 AM
I think Mxyzptlk has a nice ring to it.

flakwagen
03-27-2006, 06:05 AM
The HMBAWT Mk. I (Hold My Beer And Watch This!)

Flak

Capt.LoneRanger
03-27-2006, 06:06 AM
The HMBAWT Mk. I (Hold My Beer And Watch This!)

http://forums.ubi.com/images/smilies/88.gif

http://forums.ubi.com/images/smilies/clap.gif

rnzoli
03-27-2006, 06:20 AM
The Big Wing

Breeze147
03-27-2006, 06:26 AM
Put some .50's on it and call it a P-51.

Redwulf 32 - Nis
03-27-2006, 06:35 AM
Z4K, your flying wing needs an airfoil with zero or negative pitching moment - look at hang glider profiles - trailing edge has to have a negative angle wrt the chord i.e. upwards.

The Eppler profile you're using will toss you around like mad given half a chance (think pitching moment).

Good luck - nice to see people experimenting and learning - get that profile right and my money's on you http://forums.ubi.com/groupee_common/emoticons/icon_cool.gif

p-11.cAce
03-27-2006, 06:42 AM
UMMM..why go through all that trouble when you can just buy an ATOS VX? It will spank your design, is tested and certified, and has solved the rigid wing problems of pitch instability by incorporating a low profile v-tail. Unlike your design it also uses spoilers for roll control (how do you achieve this?) and flaps for landing pitch and speed control (again how does your design achieve this?).
http://i25.photobucket.com/albums/c99/acmeaviator/loser37.jpg
http://i25.photobucket.com/albums/c99/acmeaviator/loser30.jpg

major_setback
03-27-2006, 06:58 AM
"SORAKI" (Ikaros in reverse!).

BSS_Goat
03-27-2006, 07:04 AM
I'll help, here are 3 names:

"Instant Death"
"Widow Maker"
"OH SHIIITTTT"

Jaws2002
03-27-2006, 07:44 AM
It will eventually end up in the drink, so call it 'Aussie Splashmaster". http://forums.ubi.com/images/smilies/16x16_smiley-tongue.gif

Deedsundone
03-27-2006, 07:53 AM
Easy,The Wing.

SATAN_23rd
03-27-2006, 07:57 AM
Originally posted by Jaws2002:
It will eventually end up in the drink, so call it 'Aussie Splashmaster". http://forums.ubi.com/images/smilies/16x16_smiley-tongue.gif

HAHAHAHA, I LOFLed. Seriously.

Pirschjaeger
03-27-2006, 08:06 AM
"The RBJ Brow Flyer".

http://forums.ubi.com/images/smilies/winky.gif

Capt.LoneRanger
03-27-2006, 08:09 AM
http://forums.ubi.com/images/smilies/16x16_smiley-very-happy.gif

But it's not hairy enough http://forums.ubi.com/images/smilies/35.gif

TgD Thunderbolt56
03-27-2006, 08:21 AM
in light of the desired color scheme...The Aussie <span class="ev_code_YELLOW">bumblebee</span>. Bumblebees aren't supposed to fly either, but they do. http://forums.ubi.com/images/smilies/shady.gif

TB

eskimo-again
03-27-2006, 09:01 AM
called the ****IATT

"Seemed like a good idea at the time"

or the D-Wimf

"Dude where is my fuselage"

Pirschjaeger
03-27-2006, 09:16 AM
Originally posted by Capt.LoneRanger:
http://forums.ubi.com/images/smilies/16x16_smiley-very-happy.gif

But it's not hairy enough http://forums.ubi.com/images/smilies/35.gif

How about "Can't afford the rest flyer"? http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

or " a wing and a prayer"? http://forums.ubi.com/images/smilies/16x16_smiley-very-happy.gif

djetz
03-27-2006, 10:00 AM
"Barry"

Capt.LoneRanger
03-27-2006, 10:14 AM
http://forums.ubi.com/images/smilies/16x16_smiley-very-happy.gif

What about "B2-Prototype"

or

"The only thing able to outturn a Spit."

And I still think the rudder is seriously undermodelled.

I'd also find "Lawndart" fitting...

Saunders1953
03-27-2006, 10:22 AM
"Dubya"

DaimonSyrius
03-27-2006, 11:02 AM
Originally posted by Z4K:
<span class="ev_code_YELLOW">Name this plane</span>

Possibile seeds for names include:
<span class="ev_code_YELLOW">*:</span> The fact that it's an (the only, I think) Australian entry (the competition is in Bognor Regis, England).;
<span class="ev_code_YELLOW">*:</span> Some play on Gossamer Condor/Albatross/Penguin (Gossamer Emu? );
<span class="ev_code_YELLOW">*:</span> Colours. Likely to be black and yellow, though for the sake of a good name I'd change that (until this weekend when I get the material). Maybe "Bee Brave"?;
<span class="ev_code_YELLOW">*:</span> The fact it was made in my loungeroom;
<span class="ev_code_YELLOW">*:</span> As the competition flights are over (into) water (the Channel), something water-related;
<span class="ev_code_YELLOW">*:</span> Something completely different. Possibly something unpoetic and unfunny like the Howard Hughes style: "H-4". Or in my case, "Z-2".

On your first and third naming seeds:

Southern Black Cross: playing with the 'Southern Cross' constellation idea mixed with the appearance of the flyer being 'crucified' on it (in a cool and eye-pleasing way) in the pics you showed. Additionally, it might have a 'marine navigation' resonance (fitting 5th seed too).

Southern Black Box: On a similar but simpler note, just because it's so strikingly rectangular for a flying device, as (I'm guessing) seen from below. Might sound as a pun on modern hi-tech aircraft equipment http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

Hope you like them. Great work anyway http://forums.ubi.com/images/smilies/25.gif

http://forums.ubi.com/images/smilies/16x16_smiley-happy.gif

Cheers,
S.

P.S.: If you already have settled for yellow-black colours, you could use 'Y-Black' instead of just 'Black' in my proposals, for an additional intriguing sound to the name http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

sobbyoscar
03-27-2006, 11:20 AM
"I want to die while hanging from a wing" or "IWDWHFW"

BfHeFwMe
03-27-2006, 11:29 AM
Kein Geschw√¬§nzter Teufel http://forums.ubi.com/images/smilies/59.gif

ATLAS_DEATH
03-27-2006, 01:53 PM
The Albotross of course.

diomedes33
03-27-2006, 11:30 PM
That's awesome Z4K, glad my post helped you. I'm a bit envious, I haven't had the guts to build and fly anything I've designed yet.

flakwagen's HMBAWT Mk.I, gets my vote http://forums.ubi.com/images/smilies/88.gif

When I used xfoil for classes and labs, I mostly focused on the first two graphs. I would guess Xtr referes to x trip, which as you already guessed is the seperation point for the boundary layer. Xtr/c is just non dimensionalizing it. From the plots it looks like CL, CD and CM are the only variables used. CL is definately one of the sets in the Xtr/c graph. The other one is most probably CM, CD would decrease as Xtr moves towards the trailing edge.

If you haven't found it already, PPAX will let you set the axis dimensions so the curves don't draw into the text.

Good luck in the contest. Let us know how you do.

thefarb2
03-28-2006, 01:51 AM
Scwuggles, Datoid III

Z4K
03-28-2006, 04:22 AM
gorillasika: "W-OZ'UP"
flakwagen: "HMBAWT" - (although it'd be Mk II, because this is my second)
sobbyoscar: "IWDWHFW" - (I still have a scar on my face from last year's "landing")
Jaws2002: "Aussie Splashmaster" - ("eventually" is too generous. My best competition flight was less than 3.1 seconds long http://forums.ubi.com/groupee_common/emoticons/icon_frown.gif )
ATLAS_DEATH: "Albotross"
TgD Thunderbolt56: "Aussie bumblebee" - (though it's the wrong way round: this thing IS supposed to fly, but doesn't http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif )

All great, many thanks! When I settle on one, I'll let you know.


Capt.LoneRanger:

"The only thing able to outturn a Spit."

It doesn't turn at all. Perhaps a better name would be "The only thing a TB-3 is able to outturn" http://forums.ubi.com/groupee_common/emoticons/icon_razz.gif


Redwulf 32 - Nis:

Don't worry. That eppler graph is about 18 months old, from when I was looking at the absolute maximum coefficient of lift obtainable. The airfoil I've used, and will use again has neutral pitch stability, high clmax and high cl/cd. The only problem with it is that there's absolutely no tactile feedback. The wing will let the pilot put it at any angle of attack without resistance - which makes flying it next to impossible (am I near the stall? I have no idea... Should I push up and risk a stall, or pull to recover in case I'm already stalling?). So much so that I've had to build an electronic angle of attack sensor with helmet-mounted display. That's yet to be flight proven, but the prototype's pretty good.


p-11.cAce:

Well, for one - the 42 foot span of the ATOS VX exceeds the competition limit by 12.5 feet. I know it's a far better hang-glider than the thing I'm building, but I don't think it could do the job. It has to start flying with a 90kg (198lb) pilot from a 10 metre (32.8 ft) start, after a short run-up, potentially with a tail-wind. After that, it should -ideally- carry me a total of 100m from the start point.

My plane (to use the term generously) has flaws by the bucketload, but is purpose-built for the task. For one, it's practically unsteerable and has no stability about the vertical axis - by design. The course is a straight line. Last year, despite strong crosswinds (several other competitors judged it better to launch 90 degrees to the course (and therefore into the wind) and turn in flight. My massive beast shrugged off the crosswind (just look at the windsock in the first photo), sideslipped through it and made the straightest flight of the competition. Of course, the spar snapped in flight, but that wasn't unexpected. I can't explain why the wing (which was built with no dihedral nor vertical surfaces) levels itself, but it does. Mine weighs on the order of 16kg (35lb), less than half the ATOS VX.

That said, if I had to strap myself into one over a 20 metre or more drop, the ATOS VX would be my choice without hesitation.


DaimonSyrius:

"Black Box", with dayglo orange skin is appealing. Both for the box shape, and in reference to the flight data recorder. http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif After all, it will certainly have to be recovered by a salvage team.


diomedes33:

I'm glad to hear from you again. Those initial Octave m-files you wrote for me grew into a suite of 19, which together make the world's latest 2D, non real-time, text-based flight simulator http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

Yes, I'm familiar with PPAX and have set the defaults the range I typically use so I don't have to muck around with it every time I start X-foil. I don't really need to know (at least I don't know that I need to know) anything about the third section of the plot, it's just curiosity. I can see the set that plot Cl/xtr, but the other set don't seem to line up with anything. They go outside the range of cm.

As for results, last year I was third in the world! Well, equal third (on points http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif). Apparently I needed a whole lot more practice before the competition. It seems three hops down a hill less than 5 seconds long weren't enough.

I don't know if you saw it, but in the spirit of those propaganda posters I made for that original thread, I made this to show my appreciation for your help:

http://www.5images.com/uploads/e8c1cbac1d.jpg

Finally, when it comes to building and flying your own design - all you need is a ridiculous motive and a healthy failure to appreciate your own mortality http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif Seriously, I eventually want to progress to something I'd be happier to fly higher in than I'm prepared to fall. In the meantime though, these are great fun.

VonKlugermon
03-28-2006, 09:05 AM
How about Dodo? Here's your noseart:

http://www.yorkshiremuseum.org.uk/images/dodo_bird.gif

Willy

Megile_
03-28-2006, 09:09 AM
"My other plane is an LA-7"

Warrington_Wolf
03-28-2006, 02:08 PM
How about T.I.A.B (To infinity and beyond) or the Buzz Lightyear http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

diomedes33
03-29-2006, 12:43 AM
HAHAHA Z4K that's great, I like it. I must have missed it before, first time I've seen it.

I played around with xfoil today and found out what that other line was. In the data file it outputs xtr for the top and bottom. The funny curve is cl vs xtr/c(bottom).

boxduty
03-29-2006, 01:40 PM
Wiwaxia

dugong
03-29-2006, 06:18 PM
How about "Larry."

hally69
04-05-2006, 05:06 PM
X1 Super Melvin

MLudner
04-05-2006, 05:43 PM
Daidalos, the father and the one that did not melt his wings by flying too close to the sun. http://forums.ubi.com/images/smilies/shady.gif

MLudner
04-05-2006, 05:44 PM
Skyfarer.

BaldieJr
04-05-2006, 08:46 PM
It has no hair so call it Baldie3rd