Estes Skytracer Clone #1361 Build, Part 2, Engine Mount

The original kit did not have an engine block. I added the engine block.

TIP: Instead of just cutting a slit 1/4" from the top (as shown in the instructions) I set the engine block beside the tube and mark the top edge with a sharp pencil. This puts the upper bend of the engine hook right above the bottom of the engine block. Quest kits are marked and slotted this way.

The centering rings were way too tight around the BT-20J engine tube. 400 grit sandpaper was wrapped around a finger and the inside burr was sanded down.

On the right, a notch was cut in the upper ring for the Kevlar and engine hook fit.

Here's a dry fit of the rings and engine hook. Kit  instructions typically have the upper ring even with the top of the engine tube.

TIP:  For a stronger mount - Position the upper centering ring down over the top bend of the engine hook.

TIP: Sand the face of the low centering ring flat before gluing onto the tube. That low face of the ring will be exposed on the finished model, when even with the end of the BT-50 main airframe tube. You'll want that flat surface smooth.

 

Fillets are applied to both sides of the rings leaving the Kevlar slot open.

Tie the Kevlar line around the tube. I lace the end under and over the loop a few times. You could use a knot but there isn't much room between the BT-20 engine mount and BT-50 body tube.

 

Cut off the excess and press the end into the wet glue fillet.

Mentioned earlier, a engine block was glued into the top of the mount even with the top of the tube.