If you're concerned about getting a front-hinged canopy out of the way in a hurry should you need to bail out, you may want to look at the "emergency quick-release" jettison setup on a factory Pitts with the two-place bubble. It's side-hinged, but the concept would be the same. Basically, the emergency release unlatches the canopy latches and pulls the hinge pin(s) out with the same single-hand lever motion. Many gliders have front-hinged canopies, and also have their instrument panels attached to the canopies. They have a "hook" kind of thing at the top rear edge of the canopy frame that engages with the airframe at that point. When the jettison release is pulled, the hook keeps the rear of the canopy in place just long enough to let air get under the front, so the front rises first and the canopy flips up and away. Keeps the pilot from getting smacked in the head by the hard and heavy panel. If I can find some pics of either of these I'll post them but a search will probably turn some up quickly enough.
Chris On 5/13/2015 4:55 AM, colin hales via KRnet wrote: > Canopy hinge, > Hi Paul. > My canopy is hinged at one hinge on the front. You can climb in and work on > the plane also if necessary from both sides. If you leave the canopy open and > try to take off, the canopy gets sucked open about 1 inch but then blown down > in equilibrium. I did tests to see what would happen. I taxi about with my > canopy open for better cooling and i look out the side for better vision in > my tail dragger KR2.In my mind there is no decision to be made. So many side > lifting canopy latches are inadequate. If the canopy opens in flight it gets > torn off, the turbulence over the tailplane then removes function of elevator > and rudder and you are in trouble. Forward lifting canopy can not do this.I > ware a parachute on all my Kr flights in Britain. It just gives another > option incase of a midair in our congested skies. If you really want to get > out, I carry a hammer, but no need really. The perspex is bonded on and 4mm > thick. I could put my fist straight through it if I so desired. If I needed > to get out, a fist and upward body motion would see me through the canopy in > seconds if that, remember, you just need to get your upper body out and pull > the cord, the chute will pull the rest of you out. My one forward main hinge > with forward and rear locking pins incase that forward hinge debonds in > flight? The design is easy and so simple to use and available from me > approved by our LAA govening body.Like I said, I don't say much unless I > think it important, if I had my way, all Kr's would be forward hinging. We > all have the Kr' aircraft operation, function and design reputation to > protect. Regards Colin Hales. > I'm trying to decide on which way to hinge my canopy. I know the currant > trend is to mont it from the front. ?But I can't get over the inability to > open the canopy in flight if you need to jump out.Is anyone putting with a > side hinge in or is everyone hinging from the front?Paul ViskBelleville > Il.618-406-4705 > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > >
