Another option is camlock fasteners. ? ? ? ? ? ? ? ? 1/4 turn and it's on. ?A little pricey after you get all the parts together. This is how Cessna cowlings are attached. ?
Paul Visk Belleville Il 618 406 4705 Sent on the new Sprint Network from my Samsung Galaxy S?4. <div>-------- Original message --------</div><div>From: Mark Langford via KRnet <krnet at list.krnet.org> </div><div>Date:10/13/2014 9:19 PM (GMT-06:00) </div><div>To: KRnet <krnet at list.krnet.org> </div><div>Subject: Re: KR> Two questions.... </div><div> </div>Phill Hill wrote: >>Saw several examples using hinge sections, while nice, looks to me to be a hassle if not pretty straight. I'm not exactly into the impractical. For whatever reason, many RV guys choose to force the hinge pins that fasten top to bottom cowling halves through the tight curve at the front, installing them by pushing them aft from prop toward the tail. I put a screw on each side of the spinner to hold the halves together at the very front (into nutplates riveted into the cowling), then insert the hinge pins from the fuselage side toward the spinner. The hinge pin stops just before the sharp curve in the cowling, but goes just far enough for it to tighten so it won't slide out. But until it hits the curve, it's very easy to install. Then I secure the hinge pin with a #4 wood screw into the edge of the firewall (the hinge pin is looped on the end...heat to red with propane torch and bend around some needle nose pliers). Inserting the pin from front to back has the added hazard of the potential of the pin backing out during flight. Sounds improbable, I know, but I saw a $13k prop have all three blades damaged for that very reason. I don't even bother fastening the bottom of the cowling to anything...I'd get dirty undoing things. I've toyed with a tongue and groove thing to support the bottom of the cowling during installation, but I quickly learned the right order of things to reinstall the cowling bottom by myself with no real effort. The vertical hinge pins are pure child's play, as they just bottom out at the sharp curve in the bottom and stop, tucked neatly inside the cowling before the top cowling half is put on. Best of all, there are no unsightly screw heads showing on the sides, along with the drag they create. Like I said, three times quicker than screws, and even more effective because the hinge pins are continuous support. It's dirt simple, very effective, light, and super fast to remove and replace compared to screws...but what do I know...I've only flown them both. I guess "impractical" is in the eye of the beholder. The beauty of hinge pins is that they can be done later as a retrofit, so try the screws, and after you get tired of that gig, you can rivet piano hinges in place and see for yourself... -- Mark Langford ML at N56ML.com http://www.n56ml.com _______________________________________________ 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
