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justthemaid
Nov 21, 2006, 4:54 PM
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The sherpa may have died on the ascent, but if there is an Everest for geeks, my boyfriend was at the summit this morning.
Nevermind that our house is littered with model airplane catalogs and piles of airplane parts. He has now disovered (to my horror) Radio Flyers .com.
A fortified bastion for uber-geeks of the world.
Glancing over his shoulder this morning I read the following...
QUOTE:
"TL54
Thorsten Lutz has developed the airfoil series TL54, TL55 and TL56 using Eppler Code. The airfoile series is already some years old, but has been hardly known in tailless scene. The difficult relations concerning stall behaviour on Tailless using different airfoils does normally not concern to the requirements of competition RC-Models. The potential benefite using different airfoils is minimal due to the flight behavior. Often it is so worse that just Tailless speed models use different airfoils. But even F5D designs normally use just one airfoil because cd optimization means reducing cd where cl requirement is small. And where is cl small? @Wingtip. What means stall @wingtip? Ok, the influence of reduced cd on stall behavior should be quite clear now. RC pilots normally don't like digging their models...
Therefore we do not talk about teamwork performance of this TL series, just about possible application using one airfoil for wingdesign.
The main attention during design phasis aimed for long laminar run on airfoil lower surface at high speed (cl=0.1 .. 0.0). This is the basis to achieve low airfoil drag at highspeed. Inspite of 2,41% camber TL54 reached this design goal. We have here an airfoil that provides a lot of lift (CLmax) despite very low drag at low CL! The direct consequence is an extremely wide area of application! Now the F3B designer should become poorely soundproofed among us, because the secret of the MH-32 is reasonable just this...
Let's talk about something else: the zero lift moment coefficient (cm0) is around cm0 =-0.017 and this is unstable. Some years ago (4mm washout and cm0=0 design airman ) we didn't have the counsciousness to use cm0<0 sections because of high washout. Later on we became more self-confident and noticed that a lot of washout does not hurt. The experience using SD7003 and RS004A showed that it works, inspite of cm0 =-0.04. In addition to this there is something else: Some of these models had problems around pitch axis (elevator). Pilots complained about stability problems, some designs of this period had been unstabile.
And just this is an interesting point: I do not know F3B-Tailless designs which aim the middle between these before mentioned design concepts: cm0 =-0.02. Which does not or just partially work with cm0 =-0.04, could work with cm0 =-0.02!!! And in my opinion TL54 is just the right choice for this!
(Don't talk about C Wings! This is a hidden h-stab!!!)
The only disadvabtage of TL54 is the thickness of about 10% from my point of view. Light models might fly a little bit restless in gusty conditions. I would advise you to reduce thickness around 9%. Same time you should decamber the TL54 to get the before mentioned long laminar run on lower surface inspite of reduced thickness.
Result: My personal favourite for the next season!"
My personal favorite part: "Let's talk about something else: the zero lift moment coefficient (cm0) is around cm0 =-0.017 and this is unstable..."
Oy.
I notice there are a grand total of ZERO females in the entire world that are into this crap.
Anyone else smell the scent of bachelors?
Is there some kind of AA group?
Can anyone refer me to one of those deprogramming groups to scoop up my boy in a van and fix him before it's too late?
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slablizard
Nov 21, 2006, 5:00 PM
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ask one of the DZ guys for a tandem ski-dive, He'll love that!
Better
Ask one of the DZ chicks for a tandem ski dive..he'll love that even more.
How old is your son?
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justthemaid
Nov 21, 2006, 5:02 PM
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In reply to: ask one of the DZ guys for a tandem ski-dive, He'll love that! Better Ask one of the DZ chicks for a tandem ski dive..he'll love that even more. How old is your son?
He's 33.
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devils_advocate
Nov 21, 2006, 5:04 PM
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That's just crazy... I always keep my zero lift moment coefficient below -0.02
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slablizard
Nov 21, 2006, 5:16 PM
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In reply to: In reply to: ask one of the DZ guys for a tandem ski-dive, He'll love that! Better Ask one of the DZ chicks for a tandem ski dive..he'll love that even more. How old is your son? He's 33.
Oh. I see.
call drop zone NOW! :)
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the_climber
Nov 21, 2006, 5:18 PM
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[insert]dizzy confused smiley[/insert]
People like that exist.... in the real world.... I though it was only in those corny disney straight to TV movies. :wtf: <----I miss this smiley!
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justthemaid
Nov 21, 2006, 5:18 PM
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In reply to: That's just crazy... I always keep my zero lift moment coefficient below -0.02
Egads.
Is this some kind of secret geek code?
You just warned him that the van is coming, didn't you??
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vertical_reality
Nov 21, 2006, 5:28 PM
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Maybe you should try asking him why he's into stuff like that. You might actually learn something new about him.
A few years ago I bought a particular Transformer off eBay and my wife made fun of me. I told her that when I was young my family didn't have enough money for me to get it (close to $50 in the early 80's) and it was the one that I really wanted but could never afford. Now that I make more money then I know what to do with I thought it'd be fun to fulfill a childhood fantasy. She didn't say a thing when I bought the Millenium Falcon.
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arrettinator
Nov 21, 2006, 5:36 PM
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I'm an astronomy/telescope geek, myself. I'm building a 6" f6 Dobsonian with a custom focuser which, when finished, will have less than .5" profile and 4"+ travel and will will fit .965" - 2" eyepieces. I'm also customizing an 11mm - 70mm zoom eyepiece from an old video camera lense. Eventually I will build a GoTo system for it, where the curcuitry and software/database to run it will be my own work.
Just remember, it could be worse.
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j_ung
Nov 21, 2006, 5:46 PM
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And you sleep with this guy?
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mynameisnobody
Nov 21, 2006, 7:51 PM
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He has zero lift coefficient. Sleeping is probably all they do.
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devils_advocate
Nov 21, 2006, 9:02 PM
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In reply to: He has zero lift coefficient. Sleeping is probably all they do.
:D
...I'm taking it back. Way back, to the ASCII smileys.
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justthemaid
Nov 21, 2006, 9:29 PM
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QUOTE: "Maybe you should try asking him why he's into stuff like that. You might actually learn something new about him.
A few years ago I bought a particular Transformer off eBay and my wife made fun of me. I told her that when I was young my family didn't have enough money for me to get it (close to $50 in the early 80's) and it was the one that I really wanted but could never afford. Now that I make more money then I know what to do with I thought it'd be fun to fulfill a childhood fantasy. She didn't say a thing when I bought the Millenium Falcon"
Ahem. all I can say is...
"DORK"
QUOTE:"I'm an astronomy/telescope geek, myself. I'm building a 6" f6 Dobsonian with a custom focuser which, when finished, will have less than .5" profile and 4"+ travel and will will fit .965" - 2" eyepieces. I'm also customizing an 11mm - 70mm zoom eyepiece from an old video camera lense. Eventually I will build a GoTo system for it, where the curcuitry and software/database to run it will be my own work.
Just remember, it could be worse."
"DOUBLE DORK!"
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justthemaid
Nov 21, 2006, 9:39 PM
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Jung said:"And you sleep with this guy?"
Well, when we started dating he actually climbed rocks. With trad gear. Like a real man. Now it's all about the servos and what colored plastic crap will patch up the holes this week.
*(Moan)*.
What the hell happened?
How did it come to this?
mynameisnobody said:"He has zero lift coefficient. Sleeping is probably all they do."
*(cough)* *(gasp)*
That made me choke up my soda.
I'll have to plead the 5th on my BF's behalf.
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shorty
Nov 21, 2006, 10:49 PM
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In reply to: Jung said:"And you sleep with this guy?" Well, when we started dating he actually climbed rocks. With trad gear. Like a real man. Now it's all about the servos and what colored plastic crap will patch up the holes this week. *(Moan)*. What the hell happened? How did it come to this? mynameisnobody said:"He has zero lift coefficient. Sleeping is probably all they do." *(cough)* *(gasp)* That made me choke up my soda. I'll have to plead the 5th on my BF's behalf.
I suspect that it might be too late to salvage the aforementioned geeks' (yes, plural) grasp on reality. Should your bf get back into climbing, his trad climbing will almost certainly include color-coordinating and racking and gear according to their coefficents, standard deviations, and moduli of BFD, POS, and WTF. This is sad -- truly sad. He must be immediately immersed in get-back-to-caveman-basics therapy, less geekdom take a permanent hold.
Mongo like food. Mongo like drink. Mongo like gf. Mongo like yellow camalot -- it fit in in hand-size crack. Mmmm, Mongo happy.
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devils_advocate
Nov 21, 2006, 11:47 PM
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In reply to: Mongo like gf. Mongo like yellow camalot -- it fit in in hand-size crack. Mmmm, Mongo happy.
No comment >:)
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justthemaid
Nov 22, 2006, 12:52 AM
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Perhaps it's time for me to start seeing other people.
Anyone got Burt Bronson's phone #?
I think I'll ask him out.
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devils_advocate
Nov 22, 2006, 12:56 AM
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In reply to: Perhaps it's time for me to start seeing other people. Anyone got Burt Bronson's phone #? I think I'll ask him out.
Yeah I have it, just PM'd it to you.
Oh wait... that was mine >:)
(This post was edited by devils_advocate on Nov 22, 2006, 1:17 AM)
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brent_e
Nov 22, 2006, 1:03 PM
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In reply to: In reply to: Jung said:"And you sleep with this guy?" *(Moan)*. obviously someone is sleeping with you. i don't know how many of you read the whole initial blurb......i couldn't...
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justthemaid
Nov 22, 2006, 1:35 PM
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Hey...geeks need love too.
Truth be told- I didn't read the whole thing either. Itallics were placed for your scrolling pleasure.
With witty commentary like that, I can see how Brent has managed to have his own talk show for like 10 seasons
At least you passed the dork test if you lost interest after about three words of that thing.
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robbovius
Nov 22, 2006, 1:42 PM
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So because your boyfriend has developed an interest in the science of aerodynamics, using model aircraft as a venue to explore this interest - which is certainly more easily realized than building fullsize aircraft - you're calling him a dork?
HE should dump YOU.
(This post was edited by robbovius on Nov 22, 2006, 1:42 PM)
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justthemaid
Nov 22, 2006, 1:58 PM
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...and yet another preacher steps up to the pulpit.
Tell ya what- I'll send you the BF's # and you boys can go play with your toy airplanes. while I go climbing with Burt.
(This post was edited by justthemaid on Nov 22, 2006, 1:59 PM)
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lagr01
Nov 22, 2006, 2:24 PM
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A girlfriend that doesn't understand her boyfriend's passion for a hobbie... I've been there. Although horses may not appear as geeky as model airplanes at first, once you start talking about pedigrees and genetics it may sound somewhat nerdy. I didn't mind being called a pedigree geek by her, but not being understanding to my spending most my wage on boarding, trainer and tack... and even worst, daring to say "why do you spend so much on an oversized pet?"... I wonder how she's been doing 
(This post was edited by lagr01 on Nov 22, 2006, 2:25 PM)
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robbovius
Nov 22, 2006, 3:30 PM
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In reply to: ...and yet another preacher steps up to the pulpit. Tell ya what- I'll send you the BF's # and you boys can go play with your toy airplanes. while I go climbing with Burt.
yeah yeah, yeah. It's plain that you can't understand it - either the science, or your BF's fascination -and we're all laughing at you, because you're having this online tantrum about it.
"wah wah, my BF has a an interest I dont' get, so me must be a geek, wah!"
exactly who's the dork here? ;-)
(This post was edited by robbovius on Nov 22, 2006, 3:31 PM)
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mynameisnobody
Nov 22, 2006, 3:59 PM
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I'll wager that Robovirus and lagsbehind1 are -- that's right, SINGLE or soon to be single, and have no idea how they got that way, Bwahahahahahahahahaha!.
Ohhh, testy, angry geeks, I'm sure the maid is just trembling in her tight little rock booties.
Poor maid, her BF is interested in mechanical aeronautaics, when he SHOULD be interested in organic hydraulics.
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