Comments by "Vikki McDonough" (@vikkimcdonough6153) on "Royal Navy Fleet Exercises - 1929 (Exercise MA & MZ)" video.

  1. In the interwar era and WWII, U.S. and Japanese aircraft carriers had open-sided hangars, while British carriers tended to have sealed hangars. The open-sided hangar provided ventilation, allowing aircraft to be started and warmed up in the hangar and thus allowing for a faster aircraft-launch cadence, but it constitutes a massive vulnerability if the carrier comes under attack (it's easy to imagine skip-bombing attacks, air-launched rockets, glide bombs, kamikazes, etc., sailing into the huge openings in the side of the hangar and making lots of flammable and explosive stuff down there go boom) and poses the risk of high seas coming in through the side openings and washing the hangar clean of aircraft; the British sealed hangar eliminated the huge vulnerable openings in the side of the hangar, but its greatly-reduced ventilation capacity required aircraft to be started and warmed up on the flight deck to avoid asphyxiating the hangar crew, which slowed down flight operations. Why didn't anyone use a sealed hangar with high-capacity mechanical ventilation, to avoid the massive drawbacks of the open-sided hangar while still allowing aircraft to be started and warmed up in the hangar? Mechanical ventilation systems with sufficient airflow capacity for internal-combustion-engined vehicles to safely operate in the ventilated space were already a mature technology by the time of WWII (for instance, consider that the Holland Tunnel opened in 1927).
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