This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Aviation: Aircraft This article is within the scope of the Aviation WikiProject. If you would like to participate, please visit the project page, where you can join the project and see lists of open tasks and task forces. To use this banner, please see the full instructions.AviationWikipedia:WikiProject AviationTemplate:WikiProject Aviationaviation articles This article has been checked against the following criteria for B-class status: Referencing and citation: criterion not met Coverage and accuracy: criterion met Structure: criterion met Grammar and style: criterion met Supporting materials: criterion met This article is supported by the aircraft project. Military history: Aviation / British / European / World War II C‑class This article is within the scope of the Military history WikiProject. If you would like to participate, please visit the project page, where you can join the project and see a list of open tasks. To use this banner, please see the full instructions.Military historyWikipedia:WikiProject Military historyTemplate:WikiProject Military historymilitary history articles C This article has been rated as C-class on the project's quality scale. This article has been checked against the following criteria for B-class status: Referencing and citation: criterion not met Coverage and accuracy: criterion met Structure: criterion met Grammar and style: criterion met Supporting materials: criterion met Associated task forces: /  Military aviation task force British military history task force European military history task force World War II task force

"To properly fit the skin to the frame, a tuning fork had to be used." I'd love to know more about this. —Preceding unsigned comment added by 219.78.87.74 ( talk) 00:37, 11 February 2011 (UTC) reply

It's called pre-stressing. The skin needs to be pulled tight in particular directions, and so there will be a precise acoustic resonance, much like a guitar string. The B29 was the first such construction. The wing frames were pushed downwards in a jig and then the skin riveted on. When the jig was removed the wings became straight although the bottom skin tension meant they would not bend upwards very far. 203.87.118.239 ( talk) 00:00, 17 February 2018 (UTC) reply