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MaxNr(at)aol.com
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 Posted: Sun Jul 08, 2007 8:19 pm Post subject: How about a sliding canopy |
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The upside down scenario is enough reason to reject a slider. I still like the P38 type, but I will make the stock flip top model anyway.
do not archive
bob
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See what's free at http://www.aol.com. [quote][b]
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MaxNr(at)aol.com
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| Posted: Tue Jul 10, 2007 10:55 am Post subject: How about a sliding canopy |
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Do not archive
Last thoughts on canopies: Safety is paramount. A slider is convenient and cool, but may leak and be drafty. The "flip top" and side hinge have their drawbacks in high wind. I will confess to some formal training at Arizona State (Sun Devil U) way back in the last century. I was a military pilot then and Uncle Sam wanted me to be involved with R&D. The focus was on aircraft crash survival issues. Some notes on the 601XL: There is NO roll over protection such as a reinforced windshield bow or 4130 structure behind the seats. This adds weight but would be desirable for several reasons. Protects your head bone and allows shoulder restraints to properly lead UP and aft to an anchor. Not off your shoulders and down like some designs. (RV8.) That design guaranties two broken collar bones in a crash. You still need a fire ax or break out tool (screwdriver) to bust out. The rudder survives some roll overs although not designed for that. The BD5 swing up/back type shares the same draw backs. It was also used on a production twin, The WING Derringer now hq'ed in Mobile, AL. Years ago, watched some nerd in a Schweitzer 1-26 (side hinge canopy) land down wind and go over on his back. There was no post crash fire. We group of rubberneckers pushed it back upright and he could then open the canopy. It weighs about 350lbs empty. No damage. None. Well, some paint. The best way to leave an A/C in a hurry is through a side door or hatch. One on each side would be great. (Ercoupe, Swift, Cessna) Just some thoughts.
DO NOT ARCHIVE
Bob XL/Lyc
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See what's free at http://www.aol.com. [quote][b]
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planecrazydld(at)yahoo.co
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| Posted: Wed Jul 11, 2007 2:18 am Post subject: How about a sliding canopy |
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one of the issues address with my misguided??? attempt to implement a RV9 canopy on the XL was exactly that - to allow the aircraft that inverted in a low energy situation to rest on the engine case and the substantial built up roll bar structure that the Van's uses. Unfortunately, the mounting for the roll structure is not sound in the XL as it was never intended to carry any of those loads. Just another example of a "minor adaptation" that becomes a big deal when making a change to a well designed plane.
MaxNr(at)aol.com wrote:[quote] Do not archive
Last thoughts on canopies: Safety is paramount. A slider is convenient and cool, but may leak and be drafty. The "flip top" and side hinge have their drawbacks in high wind. I will confess to some formal training at Arizona State (Sun Devil U) way back in the last century. I was a military pilot then and Uncle Sam wanted me to be involved with R&D. The focus was on aircraft crash survival issues. Some notes on the 601XL: There is NO roll over protection such as a reinforced windshield bow or 4130 structure behind the seats. This adds weight but would be desirable for several reasons. Protects your head bone and allows shoulder restraints to properly lead UP and aft to an anchor. Not off your shoulders and down like some designs. (RV8.) That design guaranties two broken collar bones in a crash. You still need a fire ax or break out tool (screwdriver) to bust out. The rudder survives some roll overs although not designed for that. The BD5 swing up/back type shares the same draw backs. It was also used on a production twin, The WING Derringer now hq'ed in Mobile, AL. Years ago, watched some nerd in a Schweitzer 1-26 (side hinge canopy) land down wind and go over on his Looking for a deal? [url=http://us.rd.yahoo.com/evt=47094/*http://farechase.yahoo.com/;_ylc=X3oDMTFicDJoNDllBF9TAzk3NDA3NTg5BHBvcwMxMwRzZWMDZ3JvdXBzBHNsawNlbWFpbC1uY20-]Find great prices on flights and hotels[/url] with Yahoo! FareChase. [quote][b]
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