On Friday 02 April 2004 09:41, Vivian Meazza wrote:
The Spitfire also had a drag-reducing radiator. I think the key
_was_ the
wing section. The Spitfire was eventually fitted with a Mustang-like
laminar flow wing, which enabled the aircraft to reach 450+ mph.
Pardon my lack of
The Mustang was one of the first aircraft to use an airfoil designed for
longer runs of laminar flow. The Spit and FW190 did not - at least in the
early versions. The upper surface of the wing should have been able to
support a laminar flow with transition occurring as far back as half the
On Friday 02 April 2004 13:33, Jon Berndt wrote:
[...]
drag coefficient of the aircraft. The P-51 was also the first aircraft to
utilize the NACA laminar-flow airfoil sections, discussed earlier. Although
it is doubtful that any significant laminar flow was achieved on production
versions of
Gunnstein Lye wrote
On Friday 02 April 2004 13:33, Jon Berndt wrote:
[...]
drag coefficient of the aircraft. The P-51 was also the
first aircraft
to utilize the NACA laminar-flow airfoil sections,
discussed earlier.
Although it is doubtful that any significant laminar flow
was
On Fri, 2 Apr 2004 00:39:34 -, Jim Wilson
[EMAIL PROTECTED] wrote:
snip
Is it fair to say that the 400lbs of drag returns at approach speeds though?
That number isn't apparent there. BTW YASim is reporting that the p51d is
putting out about 2000 lb.+ maximum, which seems like a lot.
I
Rick Ansell wrote:
I think that the article was referring to net thrust from the
propellor-powerplant combination. 2000lb of engine ;power' doesn't
necessarily make for 2000lb of thrust from the prop.
Actually, 2000 pounds of thrust doesn't sound that far off. To start
with an intuitive
On Thu, 1 Apr 2004 18:52:03 -0600, Jon Berndt [EMAIL PROTECTED]
wrote:
BTW I never said 'whole aircraft drag' - always just the drag
due to the cooling system. In this article we have some better
numbers: 350lb of additional thrust on an aeroplane generating
c. 1000lb of thrust via the prop.
On Fri, 2 Apr 2004 08:41:02 +0100, Vivian Meazza
[EMAIL PROTECTED] wrote:
snip
The Spitfire also had a drag-reducing radiator. I think the key _was_ the
wing section. The Spitfire was eventually fitted with a Mustang-like laminar
flow wing, which enabled the aircraft to reach 450+ mph. it was to
On Fri, 2 Apr 2004 08:22:49 +0100, Vivian Meazza
[EMAIL PROTECTED] wrote:
Not only the clever radiator, but also the ejector exhausts ... They have
both been exercising my mind recently. I think both could be modelled within
the existing Yasim framework. They are both a source of additional
Jim Wilson wrote
Vivian Meazza said:
The P51d YASim file appears to have the following typo: wing ...
flap1 start=0.543 end=0.94.5 lift=1.3 drag=1.4/
^^
/wing
Makes the model interesting in roll!!
Hi Vivian,
Someone more
Vivian Meazza said:
Jim Wilson wrote
Vivian Meazza said:
The P51d YASim file appears to have the following typo: wing ...
flap1 start=0.543 end=0.94.5 lift=1.3 drag=1.4/
^^
/wing
Makes the model interesting in roll!!
On Thu, 1 Apr 2004 04:14:23 -, Jim Wilson
[EMAIL PROTECTED] wrote:
Hi Vivian,
Someone more familiar with parser might know how this is read. Maybe as 0.94?
In that case it wouldn't have any major affect on anything. This error has
been in there a while.
The biggest problem I have with
Rick Ansell wrote:
I don't think Yasims solver is set up to account for this sort of
strange behaviour.
It's not, but then again it's also not set up to model some much more
important power effects, like prop wash on the control surfaces. You
hear about this magical radiator design an awful
On Thu, 01 Apr 2004 14:18:08 -0800, Andy Ross
[EMAIL PROTECTED] wrote:
Rick Ansell wrote:
I don't think Yasims solver is set up to account for this sort of
strange behaviour.
It's not, but then again it's also not set up to model some much more
important power effects, like prop wash on the
Andy Ross said:
Jim Wilson wrote earlier:
it seems like I'll get the thing nicely trimmed for landing so that
you have to apply a little power to keep it on approach and above
stall speed. It feels right. Then once I get above the runway
(still above ground effect height), it just
On Thu, 1 Apr 2004 22:59:03 -, Jim Wilson
[EMAIL PROTECTED] wrote:
snip
As for the thrust from the oil cooler, I'm skeptical of that as well.
Estimates I've seen have been more modest anyway. This article might account
for the 80% figure since it's reference claims that the p51d duct
Rick Ansell said:
On Thu, 1 Apr 2004 22:59:03 -, Jim Wilson
[EMAIL PROTECTED] wrote:
snip
As for the thrust from the oil cooler, I'm skeptical of that as well.
Estimates I've seen have been more modest anyway. This article might account
for the 80% figure since it's reference
On Friday 02 April 2004 01:39, Jim Wilson wrote:
Rick Ansell said:
On Thu, 1 Apr 2004 22:59:03 -, Jim Wilson
[EMAIL PROTECTED] wrote:
snip
As for the thrust from the oil cooler, I'm skeptical of that as well.
Estimates I've seen have been more modest anyway. This article might
BTW I never said 'whole aircraft drag' - always just the drag
due to the cooling system. In this article we have some better
numbers: 350lb of additional thrust on an aeroplane generating
c. 1000lb of thrust via the prop. Or 400lbs worth of drag
reduced to 50lbs.
The Spitfire MkIX wasn't a
Rick Ansell wrote
Hi Vivian,
Someone more familiar with parser might know how this is
read. Maybe
as 0.94? In that case it wouldn't have any major affect on
anything.
This error has been in there a while.
The biggest problem I have with the p51d is that something
seems to
Rick Ansell wrote
On Thu, 1 Apr 2004 22:59:03 -, Jim Wilson
[EMAIL PROTECTED] wrote:
snip
As for the thrust from the oil cooler, I'm skeptical of
that as well.
Estimates I've seen have been more modest anyway. This
article might account
for the 80% figure since it's
The P51d YASim file appears to have the following typo:
wing ...
flap1 start=0.543 end=0.94.5 lift=1.3 drag=1.4/
^^
/wing
Makes the model interesting in roll!!
Regards
Vivian Meazza
___
Flightgear-devel mailing
Vivian Meazza said:
The P51d YASim file appears to have the following typo:
wing ...
flap1 start=0.543 end=0.94.5 lift=1.3 drag=1.4/
^^
/wing
Makes the model interesting in roll!!
Hi Vivian,
Someone more familiar with parser might know how this is
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