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Tango-Bravo
Topic Author
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Joined: Sun Jun 17, 2001 1:04 am

Bulge On Canadian Pacific DC-6B?

Tue Oct 19, 2010 9:02 pm

What is housed by the bulge on the lower forward fuselage of the Canadian Pacific Airlines DC-6B pictured below?
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Photo © Mel Lawrence

 
KELPkid
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RE: Bulge On Canadian Pacific DC-6B?

Tue Oct 19, 2010 9:49 pm

ADF antenna? Just a guess  
 
ImperialEagle
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Joined: Sat Jan 14, 2006 10:53 am

RE: Bulge On Canadian Pacific DC-6B?

Tue Oct 19, 2010 11:21 pm

Good question. Looks like about station 104, Can't say as I ever saw that before.
I can't tell if it is a tarp or something hanging down from the forward cargo compartment on the right side or not, but the way the sun casts a shadow on it makes it look like a bulge on the underside.
Some sort of early ground- proximity warning gear or radar maybe? Or hiding camera equipment?
 
Viscount724
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RE: Bulge On Canadian Pacific DC-6B?

Wed Oct 20, 2010 12:09 am

Quoting ImperialEagle (Reply 2):
Can't say as I ever saw that before.
I can't tell if it is a tarp or something hanging down from the forward cargo compartment on the right side or not,

No it's some type of antenna. Another photo of the same aircraft here at YVR in 1963.
http://www.flickr.com/photos/[email protected]/2606152518/

That aircraft was blown up by a on-board bomb at cruising altitude about 170 miles north of YVR en route to Prince George (YXS), the first of 4 stops en route to Whitehorse, Yukon (YXY), on July 8, 1965, killing all 52 aboard.

Another CP DC-6B with the same bulge.



Most CP DC-6Bs did not have that feature, like the two below. However there appears to be 2 smaller antennas in the same location. I'm guessing the "bulge" was some type of fairing over those smaller antennas.


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Photo © Mel Lawrence

 
ImperialEagle
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RE: Bulge On Canadian Pacific DC-6B?

Wed Oct 20, 2010 12:58 am

Maybe they needed to protect those antennas from ice accumulation.
 
411A
Posts: 1788
Joined: Mon Nov 12, 2001 10:34 am

RE: Bulge On Canadian Pacific DC-6B?

Wed Oct 20, 2010 1:43 am

That particular item is the housing for (the antenna) of a particular model of a High Range Radio Altimeter, which was used for pressure pattern navigation.
The unit is question was manufactured by Collins Radio Corporation, and fitted by Douglas (SMO) at customer request.
In addition, on some installations, the housing also contained the antenna for dual Bendix Doppler Navigators.

[Edited 2010-10-19 19:04:39]
 
ImperialEagle
Posts: 2372
Joined: Sat Jan 14, 2006 10:53 am

RE: Bulge On Canadian Pacific DC-6B?

Thu Oct 21, 2010 11:05 am

411A, thanks for advising us. One of those rather obscure things from years gone by. I could not recall ever seeing a Doug with this installation.

Are you related to a Cessna Skywagon at all? Just curious about the registration.
 
411A
Posts: 1788
Joined: Mon Nov 12, 2001 10:34 am

RE: Bulge On Canadian Pacific DC-6B?

Thu Oct 21, 2010 12:34 pm

Quoting ImperialEagle (Reply 6):
Are you related to a Cessna Skywagon at all? Just curious about the registration.

Negative

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