 |
The
Pedal Division
stops for this instrument mostly borrow pipes from other
divisions in the organ. There are
only two actual ranks in the Pedal Division: First Double Open Diapason
and Contra Bourdon. Everything else is an extension or borrowed from
another rank.
In
this photo we see parts of both ranks! The smaller pipes of the First
Double
Open Diapason are on the left, and some of the Contra Bourdon are
directly in front.
|
 |
Here's a
slightly elevated view of
the same ranks of pipes. This gives an a look at the construction of
the top of the First Double Open Diapason rank. Note the piece on top
of the pipes used to tune the pipe. The large gray pipes is the wind
supply for the chamber. |
 |
On
the other side of
the First Double Open Diapason rank (seen on the left) is the Contra
Bourdon rank. Similar in construction, these pipes have stops in the
tops of the pipes. The stops serve to tune to the pipe, but also double
its resonant frequency. So a 2' pipe stopped will speak at the 4'
pitch. Again note the gray wind supply pipe entering a chest at top.
|
 |
Here's
a better view of the Contra Bourdon rank. This clearly shows the stop
in the top of the pipe. Note the wind chest and tremulant in the top of
the photo. |
|
The
biggest pipe in the organ is the CCC pipe of the First Double Open
Diapason rank. This pipe sits in the rear corner of the
chamber.
Using the notebook as a reference, the mouth of the pipe is about 10"
wide!
|
 |
This side
view of the bottom of the CCC pipe of the First Double
Open Diapason rank illustrates how much larger it is compared to the
pipe in front of it. |
 |
Looking
up we see the the CCC pipe of the First Double Open Diapason on the far
left side, as well as additional pipes of the same rank. Note the
construction similarity to the smaller pipes shown earlier in
other photos. |
 |
 |
| This
gives a view of some of the stacked bass pipes. Pipes from the Pedal
Contra Bourdon and Swell Bourdon ranks occupy this part of the chamber.
Note the subtle differences in pipe construction. While the pipes
themselves are fairly easy to tune, getting in a position to
tune them can be a challenge. |
