I used a plastic face dead-blow hammer to set the blind nuts into place, and then I use medium CA to secure the wings of the blind nuts. For this plane the bolts are 6-32 cap-head machine screws so 6-32 blind nuts from the hobby shop are being used.
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Drill out the holes and then install blind nuts for the inner landing gear bolts. Use the cutaway part of the lite ply spacer and glue to the underside of the plate centered on the inner attachment bolts holes. Make sure not to get any glue inside the recess area. Red Baron Adhesives Medium CA and accelerator is being used here. You also have to add a little extra length to the spacer piece so it overlaps the fuselage sides.Ĭut away the center section the gear will fit into and use a sanding stick to clean up the cutouts to fit the gear.Ĭarefully glue the spacer on top of the plywood plate aligning the openings with the guidelines you previously drew on the plate. Now use the new plate and trace out a lite ply spacer to form the recesses the landing gear will fit into after the repair is complete. Here’s the final bolt holes and gear guide lines.
Once they are properly aligned, tighten the two outer bolts and then drill out the inner bolt holes. If there is a light misalignment, you can drill a slightly larger hole fto provide clearance.īolt the landing gear in place as show above and use a straightedge stick to make sure the gear are straight and square to the fuselage centerline. Test fit the new plate and lightly bolt it into place to make sure the bolts align with the threaded parts of the underlying metal angle supports.
Sand the ends to the proper length and angle to match the fuselage sides and then drill out the bolt holes on either end of the new plywood plate. Accurately transfer the outer bolt hole locations as well.Ĭut the new plate out with a band saw then use a belt sander to smooth out the cuts to the pencil guidelines. Place the old plate over some 1/8 inch Aircraft grade plywood and trace its outline. After the glue dries, remove the old plate. This gives you an accurate template for making the replacement plate. To maintain the proper bolt spacing, bolt the damaged parts of the landing gear plate back into place and glue them together. This will allow the new balsa sheeting to make a strong bond. Remove the broken landing gear attachment plate and set aside.įinish cleaning up the underlying structures and sand the edges smooth with a sanding bar.
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I find a razor plane works great for removing cracked and split sections of wood from the underlying structure. Remove the rest of the damaged sheeting from the repair area. Here you see the aluminum support angle that ties the landing gear to the internal structure. Remove all the damaged sheeting with a sharp hobby knife.Īs you remove the damaged wood, be sure to inspect the internal structure and make sure that there are no other damaged parts deeper in the fuselage and that all the glue joints are sound. If you have any fuel dots or drain/vent fittings, simply remove the fuel lines and remove them and the surrounding sheeting.Ĭlean off any glue and you can reuse the fittings Peal it away and when you get to the undamaged parts of the sides, use a sharp hobby knife to make clean cuts in the covering so you can make straight repair seals. It will over heat quickly and begin to lift up from the wood. Use a Covering Heat Gun set on high to heat the covering. Once the gear and engine cowling is removed, you have to remove the covering. Of course since the propeller is also busted, remove the cowling and check the engine, firewall and engine mount. I always like to use a foam work stand like the ones from Robart Mfg. Unbolt the gear and use a tray or pan to keep all the hardware and screws together so you don’t lose anything or have it get under your plane to cause hangar rash! The Damage isn’t terrible but to do a proper repair you have to first examine the plane and remove all the damaged parts. Here are some tips to make this all too common repair, it can be done on various other ARF models with bolt on landing gear. So he settled the plane into the tall grass at the end of the runway with a broken prop and badly tweaked landing gear for his trouble. Test Pilot and MAN contributor Aaron Ham was doing an inverted pass when the plane went dead stick heading downwind and too low for a safe 180 turn. While flying a 30cc Ultimate biplane from Aeroworks, an engine out on the downwind gave us a bad case of landing gear down.
Damaged landing gear caused by landing off-field is probably the single most common repair needed during an RC model’s lifespan.
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