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    Re: Kollsman Periscopic Bubble Adjust
    From: Jeff Gagnon
    Date: 2019 Aug 6, 20:50 -0700

    The LC-130H2 and LC-130H3's flown by the NY Air National Guard were built in the late 80s and early 90s.  The 8 bladed props were a modification the AF is testing to increase efficiency.  The J's have 8 bladed props and have no nav or flight engineer, however, special ops 130s retain navs, now called Combat Systems Operators.  Same wings.   LC-130s use navigators because the onboard INS has limitations above 70N and below 70S.  Navigators use grid navigation at those latitudes along with cel.  

    The cockpit of the Ski bird at Oshkosh may have looked relatively new because Guardmen take care of their planes.  My unit had brand new C-130H2's when I joined the unit in the early 90s.  20 years later  they were in great shape.  The 20 year old E models I flew on active duty not so much.  I think the fact is because the crews and maintainers at a Guard unit spend most of their career with their planes.

    Regarding the bubble issue, thanks for all the info.  I'm going to keep adjusting it but in the end I think its a fluid issue.  Picked up an A-12 to teach folks cel nav.  

       
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