| Author | Message | ||
     Hans Georg Schmid New member Username: Hgschmid Post Number: 27 Registered: 02-2001 |
I am building an EXPRESS 2000 and I am about to install the wings to the fuselage. Talking to several builders here and in the US I was always advised to take the following measurements which were confirmed by entries in the forum: Horizontal stabilizer: Incidence – 0.7 to – 0.8° (nose down) Wings: Incidence + 2.0° (nose up), dihedral 5° (bottom of spar) / 4° (top of spar) In the EXPRESS 2000 manual, the following measurements are prescribed: Horizontal stabilizer: Incidence 0° Wings: Incidence + 1.5°, dihedral 5° (bottom of spar) / 4° (top of spar) The incidence of the horizontal stabilizer is already set at – 0.7°. The installation of the wings has not started yet. I wonder whether anybody has an idea of whether the wing incidence in the EXPRESS 2000 may be set at + 2° (with the given incidence of the horizontal stabilizer) or whether I should change the incidence of the horizontal stabilizer to 0° and set the wing incidence to + 1.5°. Any educated guesses would be highly welcome. Knowledge even more so… Thanks. Hans Georg Schmid Switzerland | ||
| Ted Gaston (Unregistered Guest) Unregistered guest |
Hans, Which wing do you have? The actual S2000 wing or the S2000 v2.0 wing? All of the Horizontals I set up at the factory 12+ were set at 0 deg except 512EA. Since it started out life as a S90 the Horizontal was set at -1deg. All of the R.G.s were set at nuetral but with a little negative incidence you will tolerate it a bit better if you are loaded a littla aft. Hope that helps. | ||
| Hans Georg Schmid New member Username: Hgschmid Post Number: 28 Registered: 02-2001 |
Ted, I do have the original Express 2000 wings. At which incidence did you install those wings? Thanks HG | ||
| Kevin Dennes New member Username: Kdennes Post Number: 96 Registered: 01-2001 |
Greetings Hans. I set our 2000 according to "the book" (i.e. 0 deg on the horizontal) and it flys and handles very well. We have tested it in all of the weight and balance limits and it performs as we would like it. I would not make any comment about your wing settings if you do not have the horizontal set at neutral. Others may have some experience on that. Regards. Kevin (from 'Downunder') | ||
| Ted Gaston (Unregistered Guest) Unregistered guest |
Hans, That wing was always set at 0deg incidence. How are you gauging the reading you have now. Maybe this is a tool issue. | ||
| Hans Georg Schmid New member Username: Hgschmid Post Number: 29 Registered: 02-2001 |
Ted, Not talking about the horizontal stabilizer (it may easily be changed to 0°) I wonder that you set the wings at 0° as the manual clearly mentions 1.5° for the Express 2000 wing. Did I get anything wrong? Talking to my engineer of aerodynamics here in Switzerland who knows the design well he slept over it and crunched obviously some numbers and recommended today to stick to the +1.5° incidence for the wings. Best regards and thanks HG | ||
| Chris M (Unregistered Guest) Unregistered guest |
HG - If memory serves correct, your set of wings (original S-2000 wing w/the NLF airfoil) should be set at +1.5° incidence. It's not often you find an airplane with a 0° main wing incidence - especially high-perforance ones. Hope that helps... - Chris | ||
| Ted Gaston (Unregistered Guest) Unregistered guest |
Sorry, I wasn't clear, the wing is set at +1.5 and the horizontal is set at 0 when associated with that wing. | ||
| Jerry Sjostrand New member Username: Jerry Post Number: 63 Registered: 08-1999 |
Question to Chris and Ted (or others that might know). What is the NASA# for the airfoil on the S-2000. Cheers, Jerry | ||
| Anonymous |
Could someone please clear up for me the timeline and differences of the different wings? | ||
| Ted Gaston (Unregistered Guest) Unregistered guest |
Since the profile was unchanged in the S2000 Re-tooling. The NASA# should be the same for the Wheeler, Auriga, EDI and EAC S2000 v1.0 wing. The R.G. or S 2000 V2.0 wing has a completely different profile. The production break point was around mid year 2003 although a number of S2000 V1.0 skins were produced to cover the transition period. I don't know who got what as far as wings go but if your spar is taller than normal you got an v2.0 wing. Alan Roe might be able to shed some more light on that since he was there up till the doors closed Oct 2004. | ||
| Brian McKinney New member Username: Bmckinney Post Number: 89 Registered: 05-2000 |
Jerry, Here's some information from the old website.  | ||
| Chris M (Unregistered Guest) Unregistered guest |
Jerry - As you can see by the chart Brian posted, the original Express airfoil was the NASA NLF(1)-0215(F) section (but it had the trailing edge cusp removed/flattened on the bottom surface). The new airfoil on the S-2000 v2.0 wing was designed to use the same tooling as the original wing, is a very similar to the NACA 747A-315 section. There's also about 10 more sq. feet of total wing area on v2.0 - Chris | ||
| wayne (Unregistered Guest) Unregistered guest |
I'm no engineer, but the low tail planes I have seen all seem to need plenty of up trim, mine did to , so I removed my H stab and shimmed it nose down a degree or 2. now the elevator flies fair with the stab with 4 people and the tab is more neutral. By the way, my tab is about half the size of the stock 2000. what ever the "manual" says, is how I originally had it. There was no noticable speed gain by the way. | ||
| wayne (Unregistered Guest) Unregistered guest |
I am no engineer, but every low tail I have seen needed up trim, mine did too. So I remeved my Hstab and shimmed the nose down a degree or 2. now the elevator flies fair with the stab, with 4people/cruise. What ever the "maunual" says is how I originally set it. BTW there was now noticable speed gain. |