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  #1  
Old January 23rd 17, 04:06 AM posted to rec.photo.digital,alt.photography
PeterN
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Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg

--
PeterN
  #2  
Old January 23rd 17, 06:37 AM posted to rec.photo.digital,alt.photography
android
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In article ,
PeterN wrote:

Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg


The guy that made that model got the paintwork backwards! ;-ppp
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teleportation kills
  #3  
Old January 23rd 17, 08:13 AM posted to rec.photo.digital,alt.photography
Savageduck[_3_]
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On 2017-01-23 03:06:42 +0000, PeterN said:


Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg


Nice!

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Savageduck

  #4  
Old January 23rd 17, 10:35 PM posted to rec.photo.digital,alt.photography
Eric Stevens
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On Sun, 22 Jan 2017 22:06:42 -0500, PeterN
wrote:


Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg


That's a good shot. What lens did you use and did you crop by much?

.... and why does he not have his radiator open?
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Eric Stevens
  #5  
Old January 23rd 17, 11:59 PM posted to rec.photo.digital,alt.photography
Savageduck[_3_]
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On 2017-01-23 21:35:19 +0000, Eric Stevens said:

On Sun, 22 Jan 2017 22:06:42 -0500, PeterN
wrote:


Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg


That's a good shot. What lens did you use and did you crop by much?

... and why does he not have his radiator open?


If you are refering to the rear vent on the belly radiator nacelle,
that would be closed when landing, as the P-51 is not going to need the
additional thrust from the "Meredith Effect".
Note he has the flaps down for landing.
https://en.wikipedia.org/wiki/Meredith_effect
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Regards,

Savageduck

  #6  
Old January 24th 17, 02:05 AM posted to rec.photo.digital,alt.photography
PeterN[_6_]
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On 1/23/2017 4:35 PM, Eric Stevens wrote:
On Sun, 22 Jan 2017 22:06:42 -0500, PeterN
wrote:


Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg


That's a good shot. What lens did you use and did you crop by much?


Thank you. I used my Nikkor 70-200 on a D300. I am too lazy to see how
much it was cropped, but my guess is that it was not severe.


... and why does he not have his radiator open?

?

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PeterN
  #7  
Old January 24th 17, 02:37 AM posted to rec.photo.digital,alt.photography
Eric Stevens
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Posts: 13,611
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On Mon, 23 Jan 2017 14:59:19 -0800, Savageduck
wrote:

On 2017-01-23 21:35:19 +0000, Eric Stevens said:

On Sun, 22 Jan 2017 22:06:42 -0500, PeterN
wrote:


Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg


That's a good shot. What lens did you use and did you crop by much?

... and why does he not have his radiator open?


If you are refering to the rear vent on the belly radiator nacelle,
that would be closed when landing, as the P-51 is not going to need the
additional thrust from the "Meredith Effect".
Note he has the flaps down for landing.
https://en.wikipedia.org/wiki/Meredith_effect


My understanding is that the rear vent is the radiator control and is
open at low speeds and altitude to get the maximum air flow through
the radiator. See
http://c8.alamy.com/comp/BF87DY/nort...sex-BF87DY.jpg
or http://tinyurl.com/z9o4ehy and
http://h7.alamy.com/comp/B6G3M8/p-51...ane-B6G3M8.jpg
or http://tinyurl.com/hqhshew
The additional cooling from the open vent is not needed at low power
settings but will be needed if the approach is aborted the aircraft
has to climb away. Approaching with the vent closed is OK as far as it
goes but it gives the pilot one more thing to (forget?) to do in the
event an emergency suddenly calling for full power.

The thrust (from the radiator acting as a ramjet) can amount to about
30 pounds at high power and speeds at medium altitudes but as you say
it can be ignored under approach and landing conditions.

Anyway, that guy in Peter's photograph should have had the radiator
open. :-)
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Regards,

Eric Stevens
  #8  
Old January 24th 17, 04:43 PM posted to rec.photo.digital,alt.photography
PeterN
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Posts: 3,039
Default Welcome Back Duck

On 1/23/2017 8:37 PM, Eric Stevens wrote:
On Mon, 23 Jan 2017 14:59:19 -0800, Savageduck
wrote:

On 2017-01-23 21:35:19 +0000, Eric Stevens said:

On Sun, 22 Jan 2017 22:06:42 -0500, PeterN
wrote:


Just proof I don't manipulate everything.

https://dl.dropboxusercontent.com/u/97242118/P51.jpg

That's a good shot. What lens did you use and did you crop by much?

... and why does he not have his radiator open?


If you are refering to the rear vent on the belly radiator nacelle,
that would be closed when landing, as the P-51 is not going to need the
additional thrust from the "Meredith Effect".
Note he has the flaps down for landing.
https://en.wikipedia.org/wiki/Meredith_effect


My understanding is that the rear vent is the radiator control and is
open at low speeds and altitude to get the maximum air flow through
the radiator. See
http://c8.alamy.com/comp/BF87DY/nort...sex-BF87DY.jpg
or http://tinyurl.com/z9o4ehy and
http://h7.alamy.com/comp/B6G3M8/p-51...ane-B6G3M8.jpg
or http://tinyurl.com/hqhshew
The additional cooling from the open vent is not needed at low power
settings but will be needed if the approach is aborted the aircraft
has to climb away. Approaching with the vent closed is OK as far as it
goes but it gives the pilot one more thing to (forget?) to do in the
event an emergency suddenly calling for full power.

The thrust (from the radiator acting as a ramjet) can amount to about
30 pounds at high power and speeds at medium altitudes but as you say
it can be ignored under approach and landing conditions.

Anyway, that guy in Peter's photograph should have had the radiator
open. :-)


Hey! I have enough problems getting a reasonably decent image. I am not
going to tell the pilot that he's flying it wrong. ;-)

--
PeterN
 




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