Blackburn B-48 'Firecrest'?

Hi

Does anyone have any pictures of the Blackburn B-48 (or YA-1) built in
1948ish? There were only two made before the project was cancelled....

TIA
Richard

"MacMan85" wrote in message
...
Hi

Does anyone have any pictures of the Blackburn B-48 (or YA-1) built in
1948ish? There were only two made before the project was cancelled....

TIA
Richard

There's a nice one @ http://www.apda61.dsl.pipex.com/RBavpic4.htm
~~
Dingo ;~)

Try this. It is from Wikipedia.
http://upload.wikimedia.org/wikipedi..._Firecrest.png


"MacMan85" wrote in message
...
Hi

Does anyone have any pictures of the Blackburn B-48 (or YA-1) built in
1948ish? There were only two made before the project was cancelled....

TIA
Richard

DAN wrote:
here is one in flight

Let me go off on an OT tangent, if I may (and if I may not, ignore me, or
point me to group where that stuff is on-topic, please):

In a lot of in-flight pictures of prop planes, the props are slightly bent
backwards at the tips. Why is that? Since the prop is pulling the plane, I
would expect the thing to bend forward, if anything.

Michael.

Michael - my thought is that it is caused by the camera - perhaps shutter
speed or other issues. Here is an image of the same plane or type showing
the opposite, with the prop tips swept forward, for what it is worth.

Randy

"Michael Huber" wrote in message
...
DAN wrote:
here is one in flight

Let me go off on an OT tangent, if I may (and if I may not, ignore me, or
point me to group where that stuff is on-topic, please):

In a lot of in-flight pictures of prop planes, the props are slightly bent
backwards at the tips. Why is that? Since the prop is pulling the plane, I
would expect the thing to bend forward, if anything.

Michael.

Thanks! I've not seen that one before. I am really after actual photos
though, I have been planning a flying model of this aircraft for some
20 years and it's the detail that's elusive.
I did have the opportunity to look over the surviving works drawings a
long time ago, some of which I managed to photograph, but drawings
only give you the size of the parts!

On Sat, 26 Jan 2008 11:10:06 -0800, "Pete"
wrote:

Try this. It is from Wikipedia.
http://upload.wikimedia.org/wikipedi..._Firecrest.png


"MacMan85" wrote in message
.. .
Hi

Does anyone have any pictures of the Blackburn B-48 (or YA-1) built in
1948ish? There were only two made before the project was cancelled....

TIA
Richard

Nice to see both those pictures on ther 'net. I have them both
already, though. RT651 is the version I'm trying to model.

On Sat, 26 Jan 2008 20:06:20 +0100, DAN wrote:

MacMan85 wrote:

Does anyone have any pictures of the Blackburn B-48 (or YA-1) built in
1948ish? There were only two made before the project was cancelled....

Richard

here is one in flight

dan

Thanks! VF172, the MkII 'go-faster' version! (it has less dihedral on
the outer wing panels.)

On Sat, 26 Jan 2008 15:46:59 -0000, "Dingo"
wrote:


"MacMan85" wrote in message
.. .
Hi

Does anyone have any pictures of the Blackburn B-48 (or YA-1) built in
1948ish? There were only two made before the project was cancelled....

TIA
Richard

There's a nice one @ http://www.apda61.dsl.pipex.com/RBavpic4.htm
~~
Dingo ;~)

John Smith wrote:
Are you actually seeing the prop blade "bent" forward, or simply
interpreting the blade pitch as the prop being bent forward?

I would say they look bent forward, especially the lowest one.

Michael Huber wrote in news:fnhpoe$2pq$00$1
@news.t-online.com:

John Smith wrote:
Are you actually seeing the prop blade "bent" forward, or simply
interpreting the blade pitch as the prop being bent forward?

I would say they look bent forward, especially the lowest one.

I believe what you are seeing is an artifact of the camera shutter. Most
camera shutters that lie on the film plane (just above the film) consist
of a pair of horizontal or vertically moving curtains that are spring
loaded to zip across the film to make the exposure.

It takes a small, but not infinite, fraction of a second for each curtain
to cross the distance; they are timed so that each particular point on the
film receives light for the desired time, but with very short exposures
under bright conditions such as a sunlit sky, this results in the actual
distance between the leading and trailing shutter curtains being very
small, much smaller than the width of the film.

In effect, there is a narrow slit that moves across the film exposing it
as it goes. While the shutter speed may be set to only 1000th of second,
it could well take ten times that long for the slit to cover the full
frame of film. If something in the scene like a propeller is moving very
quickly, it can move visibly during that time, resulting in the apparent
warping of the propeller.

Older cameras especially can show this effect, as their shutters move more
slowly than most modern cameras.

Bob ^,,^