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Author Topic: Wing Loadings: Wet vs ECL vs FS  (Read 974 times)

Offline Rudy Taube

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Wing Loadings: Wet vs ECL vs FS
« on: March 13, 2008, 09:03:19 PM »
After adding Thierry's beautiful ECL plane to my SS list for comparison , I thought some of you might want to see how ECL stacked up against Wet CL planes? I put in a few of the Full Scale planes I have flown so that we can see the impact of the all important "Reynolds Number", (Re=68 x V x c) on our wing loadings. A 400 POUND Nobler? ;-) ..... It gives a new perspective on worrying about the difference between 13.9 and 14.3 oz/sq in in our CL planes! ;-)

As I, and others, have stated before: our CLPA planes can go up a little more in wing loading with no problems, as long as they have an INCREASE in power loading, like we now have with modern powerful wet engines and our very powerful E systems. :-)

Sorry the formating did not come across well, it looks perfect when I typed the post, but then it has a mind of it's own when it is sent to the forum. I hope it is still readable?

Feel free to send me your ECL planes data so we can all get a better idea of the range of wing loadings (and power loadings) that still works well in ECL.  TIA

The bomber is Will Moore's, the Diva is Phil Gs, the Impact E is Paul W's, the Elec Crate is Dennis As.


Aircraft   W Area   A/C wt   Wing Load        Engine
Name         sq in        oz.        oz/sq ft   
         
            
Diva      690          59          12.3        Mag .36
Impact E     750        67         12.9                  Orbit 30-12
Odyssy     700           65            13.4        ST .60
Cardinal    590           57            13.9        TT 4S .54
Nobler*      510          49               13.8        AT .36
Igor?         630            61             13.9               Saito .56
Firecrac      760         74              14.0         .66RE
PT-19       560          55       14.1             AXI 2826-10
Elec Crate  600         56              13.4             AXI 2820-8      
E P-40*     560         57             14.7      AXI 2826-10
E P-40*     560         60             15.4      AXI 2826-10
            
T-Bomber           750       75           15.4*            Two Hackers
            
Dewoitine           670        67          14.4     AXI 2826-10
            
35% Extra*      2,049     480           33.7          DA 100cc
            
Pitts S2B*   29,232   27,200    134.0        LYC 540
            
Extra 300L*   16,560   30,688    266.9       LYC 540
            
F4 Phantom*   76,320   928,000   1,750.9      Two J79-GE
« Last Edit: March 18, 2008, 10:03:18 PM by Rudy Taube »
Rudy
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Offline Dennis Toth

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Re: Wing Loadings: Wet vs ECL vs FS
« Reply #1 on: March 15, 2008, 04:40:58 PM »
Rudy,

Great stuff it would be interesting to add some prop and rpm data to your SS. My test ship (the "Electric Crate") is 56oz on 600sqin AXI2820/8 prop 11x5 APC-E, rpm 9600.

Best,             Dennis

Offline Rudy Taube

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Re: Wing Loadings: Wet vs ECL vs FS
« Reply #2 on: March 15, 2008, 09:31:10 PM »
Hi Dennis,

Thanks. Your right about the additional prop info., etc. being useful to all of us.  I have that in my SS, along with other info. (for some: lap times, AS, flight performance, Alt, Temps, etc.) It is too big for me to fit it into the forum format. The one I have posted is a shortend version to fit the space here. I also have a SS showing the comparison in CG change between Wet and ECL, and how to place the E equip. to keep the CG where it belongs.

If I get a burst of energy (a polite way of saying, when I stop being so lazy! ;-), I will reformat the SS info (reverse Col and Row) so that I can post more data for each plane on this forum.

Thank you for giving us your "Electric Crate" data. It is already part of the SS post. :-) I think it would prove useful to all of us to see what others are doing and what works. Other items like; E to E line length, and lap times are important too. Along with flight performance notes (great line tension overhead, or, had to bail out of OH 8s in the wind, or Solid great flight!, etc. ;-) I will try to get this set up so we can all easily enter and read the data. We have a link on our clubs web site with my SSs. I will look into using that here too?

I'm surprised that someone has not commented on the 400 POUND Nobler line?  ~^

Your 13.4 oz/sq/ft wing loading is impressive. I think you, Paul W, and Phil G, ALL use Helium in your planes. You guys just don't play fair!  LL~

Regards,  H^^
Rudy
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