Why does the Huey have this weird hump as shown in the picture? For some system? Why not remove it?
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$\begingroup$ Because the main rotor shaft and associated equipment (gearboxes) does not end at the outer fuselage skin. I am sure someone more versed in the arcane version numbers of the UH-1 will be able to weigh in regarding when the area around that "hump" was made available. $\endgroup$– AEhere supports MonicaFeb 18, 2020 at 8:43
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$\begingroup$ @AEheresupportsMonica Comments are not for providing partial answers. $\endgroup$– boglFeb 18, 2020 at 9:20
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2 Answers
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A copy of the original image can be found here, which is about 5 'pagedowns' down this page, which has a number of other excellent Huey-model photos.
It's a bit of structure to guide the rotor forces into the rest of the airframe, it would not be good if this bit went missing.
Fwd/aft, left/right, up/down. The rotor provides the lifting forces and driving forces and these are quite concentrated around the rotor axis. Picture the airframe like an empty beer can - some panels are required to cope with the forces while remaining in shape.
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$\begingroup$ @Freeman found it while searching for a structural image for the Huey, seems to be unclear if the original site still exists. Could not find a clear reference address for it. $\endgroup$– KoyovisFeb 18, 2020 at 23:20
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2$\begingroup$ Providing a source for the image would be strongly recommended, then. $\endgroup$– FreeManFeb 19, 2020 at 15:31
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It's where the main rotor transmission and control servos are housed. The forward bulkhead of the "hump" WAS the entire aft cabin bulkhead of the original Huey models. Starting with the D model (I Think) the cabin was extended around the transmission tunnel to form what are called the right and left alcoves. The original shorter body Hueys were adapted to the gunship roles.
