My understanding was that the eyebrow windows didnt last long. That the prototypes had them but then were later deleted on production aircraft. Other than the C-69 aircraft, I thought these all eventually disappeared (eyebrow windows.)
Post by volkerboehme on May 19, 2011 0:37:03 GMT -5
the eyebrow windows were present on the L-49, L-649 and L-749 but were removed from the C-121A and the subsequent L-649A/749A.
However, many earlier aircraft had the eyebrow windows removed sooner or later. It seems that TWA had that done quite early and some of the refurbished C-69 did not have them any more once converted to an airliner.
Post by volkerboehme on May 19, 2011 15:43:39 GMT -5
no, the Pima Connie certainly doesn't have them any more. I'm not quite sure when they went, possibly as early as the conversion from C-69 to civilian airliner.
It appears to me that TWA abandoned eyebrows quite early, while otheres retained them for a longer period. Seems like by the mid-fifties, most eyebrows were gone and I yet have to see a picture of a L-49 both with weather radome and eyebrow windows. Weather radar was compulsory by theearly '60s, but that was the period when most L-49's were just being retired.
It's all about saving weight and maintanance costs, I believe.
Any "seam" to the outside world is a pressurization nightmare to begin with. Making that seam with dis-similar materials such as glass and metal makes it harder yet again. So unless 100% necessary for safety of flight such things as crew view ports are deleted as soon as possible. All the older SWA 737s had their eyebrow windows deleted and the newer ones obviously do not have them to begin with.
I know that during the design of the latest tube liners at both Boeing and Airbus the teams at least discussed the possibility of building the new airplane without real windows.
But....in our wonderful world of bits and bytes we don't have to succumb to such mundane things as maintenance and cost. We can fly a 4 engined propliner to go for a $100 hamburger. And banking the L-049 and looking out the top for the runway to slip into view ...... it's just way cool ;D ;D
You aren't a man until you can handle three pieces of tail at one time !!
That's not fair Volker! I can't hold my breath much longer! I'm flying the 749 TWA right now so that's keeping me going for now. Actually I lied in the previous post I'm checking the forum at least twice a day. ;D