Screws vs quarter turn fasteners around the firewall

[Mark33]

I?m not at that point in the build yet, but I?m planning on SkyBolt quarter turns on the top cowling at the firewall and piano hinges everywhere else. On my first build I used the quarter turns everywhere on the cowling, but I wouldn?t do that again.

[dreed]

I'm doing Skybolts on the top cowl/firewall intersection and along the upper and lower cowl seam (horizontal). Using the hinges on the lower cowl.

I took the screws out of my grandfathers 170 and 172's enough times (manual) screwdriver) that I am looking forward to the sky bolts. Over time the holes seemd to enlarge and the nut plates would strip- I grew to hate them.

We used to use Dzus fastners in the racing applications so I have a fondness for the 1/4 turn stuff I guess.

[amerkarim]

Hi All,

Am building a 10 and am ready to fit the cowl soon

What do you attach the nut plates to if using screws?

Thanks

Amer

[bobnoffs]

to use the 1/4 turn fasteners an alum tab, .040-.062 is fastened to inside of one cowl half. fastener is riveted to the tab. tab is fastened to cowl half by countersunk solid rivets . countersink a little deep and they fill and sand nicely.
in less than flat places tab may need to be bent/ twisted a bit so it fits flat against both cowl pieces.