|
Mailed it to you direct, TJ. Its right at the limit
for the list.
Ed
----- Original Message -----
Sent: Tuesday, July 17, 2007 12:29
PM
Subject: [FlyRotary] Re: Duct Coordinates
was : [FlyRotary] Re: Oil cooler duct.
If the file is not too big, please mail it to the
list..
....or a copy to my email, if you don't mind: thjakits@gmail.com
THanx,
TJ
On 7/16/07, Richard
Nadig <blueren@yahoo.com>
wrote:
Ed,
Could you send a copy of the coordinate graphs
to me at my email address? May redesign my oil cooler duct.
Thanks, Rich
-----
Original Message ---- From: Ed Anderson <
eanderson@carolina.rr.com> To: Rotary motors in aircraft < flyrotary@lancaironline.net> Sent: Monday, July 16,
2007 4:42:29 PM Subject: [FlyRotary] Duct Coordinates was : [FlyRotary]
Re: Oil cooler duct.
Too Late, Bobby, I calculated based on a 19" width
{:>)
I have sent the coordinate graphs to your e mail as
they are a tad larger than Marv permits. I had to embed them in a MS
word document - tried converting to jpeg with PaintBrush but it didn't work
out.
So the one with Height data is looking at the duct
from the side (assuming the core is mounted with the core face perpendicular
to the direction of flight). The Width data is looking at the duct from
top/bottom. So if you shaped a foam core to these coordinates and then
rounded the edges to smooth corners, this should give you a good duct for
your core.
Things come together at the inlet around 8-9" with a
10" wide opening and a 3" wide opening - for cosmetic reasons you could make
the opening slightly wider and height slightly less just so they give you an
opening around 30 sq inches. So that looks like about 1.5"
above/below center line for a 3" total and 5" left/right of center line for
a 10" width at about 8-10" out from the core.
The streamline duct is to be preferred over my Pinched
duct where possible, but once you start getting shorter than about 6" the
truncated Streamline duct starts to show a lot of the core to the airstream
and it is my opinion the drag goes up considerably. The pinched duct
is basically a compromise duct for those with very short 3-6" duct runner
space.
Hope this helps.
Ed
-----
Original Message -----
Sent:
Monday, July 16, 2007 5:26 PM
Subject:
[FlyRotary] Re: Oil cooler duct.
Ed,
My
notes say 18".
Bobby
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net ] On Behalf Of Ed
Anderson
Sent: Monday, July 16, 2007 1:24 PM
To:
Rotary motors in aircraft
Subject: [FlyRotary] Re: Oil cooler
duct.
Hi Bobby,
You actually have sufficient distance to probably
come pretty close to a streamline duct. Tell me how wide the
core you may use from Ed - the same 19" as the stock or different?
I'll see what I can come up with.
Ed
-----
Original Message -----
Sent:
Monday, July 16, 2007 3:30 PM
Subject:
[FlyRotary] Oil cooler duct.
Ed,
It looks like I have about 10-12
inches of duct between the chin scoop and oil cooler face. The cooler is
a stock mazda but I am considering a slightly larger one that Ed K.
makes. 6.5" tall vs 5" Any suggestions on how you would shape this
duct using the pinched duct approach?
Thanks.... Bobby
-----
Original Message -----
Sent:
Monday, July 16, 2007 5:26 PM
Subject:
[FlyRotary] Re: Oil cooler duct.
Ed,
My
notes say 18".
Bobby
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net ] On Behalf Of Ed
Anderson
Sent: Monday, July 16, 2007 1:24 PM
To:
Rotary motors in aircraft
Subject: [FlyRotary] Re: Oil cooler
duct.
Hi Bobby,
You actually have sufficient distance to probably
come pretty close to a streamline duct. Tell me how wide the
core you may use from Ed - the same 19" as the stock or different?
I'll see what I can come up with.
Ed
-----
Original Message -----
Sent:
Monday, July 16, 2007 3:30 PM
Subject:
[FlyRotary] Oil cooler duct.
Ed,
It looks like I have about 10-12
inches of duct between the chin scoop and oil cooler face. The cooler is
a stock mazda but I am considering a slightly larger one that Ed K.
makes. 6.5" tall vs 5" Any suggestions on how you would shape this
duct using the pinched duct approach?
Thanks.... Bobby
--
Homepage: http://www.flyrotary.com/
Archive and
UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html
Bored stiff? Loosen up...
Download and play hundreds of games for free on Yahoo!
Games.
|