Phil Nelson
A&P-IA, Maintenance Instructor
KF 5 Outback, Cont. IO-240
Flying since 2016
I looked at my pics and I wrapped the fabric around the side of the cap-strip of #10. I remember wondering about that but I recall that I sanded the epoxy varnish to roughen it up a little before applying the fabric and taking extra care to make a good glue bond of the fabric and then shrinking it so that it was good and flat against the underside of the cap-strip. I then bonded the aluminum with 3-M and rivets. I used nut plates for holding the wing tips on for reasons stated by Papua.
I don't know about cutting the fabric off. There's only 1" of surface on the cap-strip for bonding too. That idea crossed my mind but with the ironing of the fabric to shrink it, the idea of the strength of wrapping around the cap-strip was more appealing to me. With all the bonding and rivets holding the aluminum strips on, I don't feel concerned that the wing tips will go anywhere.
EAA, AOPA
KF5 (N49FK & N36KJ)
Phoenix, AZ
This is how I done mine.
First dry fit the aluminum strip to the cap strip before fabric covering and drill the rivet holes, Countersink the cap strip for the rivet that will be installed later.
Apply the fabric and tuck it /glue it under the cap strip. Heat iron and shrink as normal.
Install the aluminum strips. No need for "bonding" you will be bonding to the fabric = no structural strength.
Rivet the strips in place with countersunk rivets. Use soft rivets or you may be damaging the rib cap strip.
When everything is secure fit the wing tip and drill pilot holes for where the Rivnut is going to be riveted. You need a tool for aligning the holes for the Rivnut.
Use countersink washers if you want to use countersink screws, or pan head screws.
Use a little beeswax on the threads of the screws. Makes easier removal from rivnut.
Last edited by taff; 02-06-2021 at 10:52 PM.
Completed my Classic 4, May 2003. It had std wings. speedster tail.
912 UL Rotax. Sold to a person in Spain.
Completed a Skybolt December 2018
Yeah, I suppose wrapping the fabric makes sense to prevent it from lifting at the end of the wing, and given the number of rivets holding the attachment strip in place, the adhesive is probably superfluous anyway.
Thanks, everyone.
Eric Page
Building: Kitfox 5 Safari | Rotax 912iS | Dynon HDX
Member: EAA Lifetime, AOPA, ALPA
ATP: AMEL | Comm: ASEL, Glider | ATCS: CTO
Map of Landings