Today's Message Index:
----------------------
1. 10:30 AM - Re: Grumman airfoil (Bob Steward)
2. 12:38 PM - Re: Grumman airfoil (Deems Herring)
3. 08:22 PM - Re: Re: Grumman airfoil (Gary Vogt)
4. 08:22 PM - Re: Grumman airfoil (Gary Vogt)
Message 1
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| Subject: | Re: Grumman airfoil |
>The Socata Trinidad airfoil is an RA 1643 or RA 16.3c3
>
>The Avions Transport Regional ATR-72 uses an RA 1843 airfoil. This
>is a NACA 43018 Mod.
>
>It's my guess that the RA 16.3c3 is the Grumman airfoil. Now all we
>need are lift/drag curves.
Based on your transposition of the digits in the ATR-72 airfoil
(which has been shown to have a dangerous proclivity to build ice
that destroys the lift...), one would surmise that the "RA1643"
airfoil is a "43016" (mod?) airfoil.
I haven't seen this overlayed on the Grumman bastardization of the
NACA laminar flow airfoil used on the Yankee, but would say that if
it is a close match, then the L/D curves would at least point us in
the right direction of understanding the Grumman modded airfoil.
Are you basing your suggestion of identicallity on actual plots
overlaid, or on the relative appearance of 2 smaller samples compared
side by side?
Damn little info found through Google on either the RA 1643 or the RA
16.3c3, other than some listings of which planes they have been used on.
--Bob Steward
Message 2
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If someone can provide a .dat coordinate file I can provide the lift/drag c
urves.
Deems
From: teamgrumman@yahoo.com
Subject: TeamGrumman-List: Grumman airfoil
The Socata Trinidad airfoil is an RA 1643 or RA 16.3c3
The Avions Transport Regional ATR-72 uses an RA 1843 airfoil. This is a NA
CA 43018 Mod.
It's my guess that the RA 16.3c3 is the Grumman airfoil. Now all we need a
re lift/drag curves.
Message 3
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| Subject: | Re: Grumman airfoil |
I cannot find any L/D curves for any RA airfoils.=0A=0AThe RA 1843 is an ol
der NACA airfoil. -It wasn't that good then. -We need to find a compara
ble '6' series airfoil.=0A=0A=0A________________________________=0A From: B
ob Steward <n76lima@mindspring.com>=0ATo: teamgrumman-list@matronics.com
=0ASent: Thursday, January 12, 2012 10:25 AM=0ASubject: TeamGrumman-List: R
d <n76lima@mindspring.com>=0A=0A=0A> The Socata Trinidad airfoil is an RA 1
643 or RA 16.3c3=0A> =0A> The Avions Transport Regional ATR-72 uses an RA 1
843 airfoil.- This is a NACA 43018 Mod.=0A> =0A> It's my guess that the R
A 16.3c3 is the Grumman airfoil.- Now all we need are lift/drag curves.
=0A=0ABased on your transposition of the digits in the ATR-72 airfoil (whic
h has been shown to have a dangerous proclivity to build ice that destroys
the lift...), one would surmise that the "RA1643" airfoil is a "43016" (mod
?) airfoil.=0A=0AI haven't seen this overlayed on the Grumman bastardizatio
n of the NACA laminar flow airfoil used on the Yankee, but would say that i
f it is a close match, then the L/D curves would at least point us in the r
ight direction of understanding the Grumman modded airfoil.=0A=0AAre you ba
sing your suggestion of identicallity on actual plots overlaid, or on the r
elative appearance of 2 smaller samples compared side by side?=0A=0ADamn li
ttle info found through Google on either the RA 1643 or the RA 16.3c3, othe
r than some listings of which planes they have been used on.=0A=0A--Bob Ste
====================
Message 4
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| Subject: | Re: Grumman airfoil |
Sadly, I can't find that either.=0A=0A=0A________________________________
=0A From: Deems Herring <dsleepy47@hotmail.com>=0ATo: teamgrumman-list@matr
onics.com =0ASent: Thursday, January 12, 2012 12:35 PM=0ASubject: RE: TeamG
rumman-List: Grumman airfoil=0A =0A=0A =0AIf someone can provide a .dat coo
rdinate file I can provide the lift/drag curves.=0A=0ADeems=0A=0A=0A=0A=0A_
_______________________________=0ADate: Wed, 11 Jan 2012 20:08:10 -0800=0AF
rom: teamgrumman@yahoo.com=0ASubject: TeamGrumman-List: Grumman airfoil=0AT
o: teamgrumman-list@matronics.com=0A=0A=0AThe Socata Trinidad airfoil is an
RA 1643 or RA 16.3c3=0A=0AThe-Avions Transport Regional ATR-72 uses an R
A 1843 airfoil. -This is a NACA 43018 Mod.=0A=0AIt's my guess that the RA
16.3c3 is the Grumman airfoil. -Now all we need are lift/drag curves.=0A
List" target="_blank">http://www.matronics.com/Navigator?TeamGrumman-List
=0Ahttp://forums.matronics.com=0A="_blank">http://www.matronics.com/contr
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