Aces High Bulletin Board
General Forums => Aircraft and Vehicles => Topic started by: Stoney on March 24, 2008, 11:16:04 PM
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Getting ready to run a series of evaluations on the 190D9 to illustrate effects of altitude on turning ability and need the tip chord to establish Clmax for tip stall behavior. I know the airfoil and thickness ratio, just need the tip chord to generate the Reynolds numbers.
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who what now
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See Rule #2
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Nah, lawyers speak gibberish, as far as I know aeronautical scientists don't have 42 words for the same thing, and don't argue over the meanings of "keep" and "is"... :D
That said, I have no idea what the tip chord on the RL Dora was Stoney.
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Getting ready to run a series of evaluations on the 190D9 to illustrate effects of altitude on turning ability and need the tip chord to establish Clmax for tip stall behavior. I know the airfoil and thickness ratio, just need the tip chord to generate the Reynolds numbers.
Can you do the arithmetic from a print?
I may have a 1:72 scale print here somewhere if it didn't get "lost". Actually it's an AutoCad.dwg file, so I may be able to pull the dims.
In the meantime, I'll look for it.
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Can you do the arithmetic from a print?
I can...I've got a 3-view source someone forwarded me in another thread. I'd rather not though, if someone has a resource that has the actual numbers.
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Rgr. I admire the quest for accuracy.
:rock
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I'll have a look in my archives to see if it's buried somewhere in there.
All I seem to have is the tip chord for the 190A
I have that listed as 48.6"
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I have 1200mm in the tip from DVL measurements ie straight lines along the leading and trailing edge are 1200mm from each other when the wing ends.
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All I seem to have is the tip chord for the 190A
Don't the 190D and 190A have the same wing?
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Don't the 190D and 190A have the same wing?
Don't you have classes to be attending?
WOOF!
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Hi Stoney,
You might click the contact tab of these folks and ask them. This is the company that is building Allison powered 190Ds. If they respond... then you'd think they would be able to give you whatever specs you want.
http://www.flugwerk.de/diary.shtm
All the best.
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I have 1200mm in the tip from DVL measurements ie straight lines along the leading and trailing edge are 1200mm from each other when the wing ends.
That converts to just over 47 inches. Given the tip chord listed for the 190A, I'll just use 48" as the tip chord.
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Don't you have classes to be attending?
WOOF!
Haha, are you confusing me with someone else in our squad? I'm at work.
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Haha, are you confusing me with someone else in our squad? I'm at work.
HA! Oops, don't you have work to do?
Congrats Stoney, and thanks for the hard work.
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Check with these guys:
http://www.nwrain.com/~newtsuit/gosshawkunlimited/index.htm
The D-13 they restored is absolutely gorgeous. :aok
http://www.cebudanderson.com/yellow10.htm
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Check with these guys:
http://www.nwrain.com/~newtsuit/gosshawkunlimited/index.htm
The D-13 they restored is absolutely gorgeous. :aok
http://www.cebudanderson.com/yellow10.htm
That might be one of the prettiest things I have ever seen.
Thank you Cthulu for posting that.
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<SNIP>Reynolds numbers.
reynolds numbers being? i know a math term, but specifcally.
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That might be one of the prettiest things I have ever seen.
Thank you Cthulu for posting that.
Thanks Messa. We have this skin in the game btw, though it's not technically a D9. I wish we actually had the D13, since 3x20mm's and I believe better performance @ altitude (Jume 213F) sounds awfully nice.
If you want a real attention grabber in your home, you might want to check this out, though it is a bit $$.
http://www4.mailordercentral.com/apollo/prodinfo.asp?number=7143
(I have to resist the urge to run around the house like an 8 yr old wth it :D)
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Don't the 190D and 190A have the same wing?
Sorry for the back to back posts, but I just found this:
From: http://www.fockewulf190.net/uk/fockewu/develuk/fwd9uk.htm
"The first version of indicated series Fw190D-9 was armed with 2 MG151/20 in the roots of wings and 2 MG131 with cap. This version was equipped with the wing and the majority of the equipment of the A-8 version."
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You might want to check this site out
http://www.albentley-drawings.com/plan_packs.htm
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reynolds numbers being? i know a math term, but specifcally.
Reynolds number (Rn) is a fluid dynamics term. In order to test airfoil profiles, you have to ensure that they are tested at the proper Rn. Generally speaking, you can approximate the sea level Reynolds number by multiplying the Velocity (in feet per second) X 9000 X lenth (in feet). The length would be the chord length. There are more technically accurate means to determine Rn (which I will use for this test) but this will get you in the ball park. So, for example, if the FW-190 tip chord is 4 feet, then the Rn at 200mph at sea level will be approximately 293 fps X 9000 X 4 = 10,548,000. This is often represented in a scientific format as 10.5E6. Most of the airfoil analysis software requires the Reynolds number to compute lift and drag numbers.
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So Rn is a quantifier for what? Viscosity of air, or something like that?
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It is the ratio between inertial force and the viscous force.