Learjet 45 Simulator Project

The shaping is nearly complete. I’m finally cutting around the edges so the panels will come loose again. The pattern on the panels gives the shell a different look. It reminds me of something that happened a long time ago in a galaxy far far away…

Learjet 45 Simulator Shell

I’m making great progress with the final shaping. Unfortunately, the foam putty I’m using is hard to get locally and in limited supply online too. I have to order it and wait for the next batch to arrive in order to progress further. I’m also being my usual perfectionist self, so that doesn’t help either.

It’s looking good though and there are only a few rough spots I need to clean up on the sides and the top, so sealing and painting will happen soon. I wasn’t as careful with applying the putty, and it got in the spaces that it shouldn’t have, so I’ll need to carve around the edges to get the panels to pop out like they’re supposed to. I’m not worried about that at all. It’s just one more thing on my list.

Learjet 45 Simulator Shell Side View Close-up

Learjet 45 Simulator Shell Front View

Um, yea. This sanding bit is taking much longer than I expected. Big surprise huh?

If I do this right, I shouldn’t have too much touch-up work after this sanding pass.

Learjet 45 Simulator Cockpit Shell Port Side Foam Putty Skim Coat

The rough shaping and sanding is done. Final sanding requires a guide coat, so I found some old acrylic paint I had sitting around and used that. What, you thought I wanted a purple plane? Only if I was Prince or a rabid Vikings fan.

Learjet 45 Simulator Shell with Sanding Guide Coat Applied

Just a quick update on my progress:

Phase 1: Rough trimming -Complete
Phase 2: Rough shaping -In progress
Phase 3: Foam putty (Fill in bubbles and other voids) -In progress
Phase 4: Final shaping (Various automotive block sanders) -Not started
Phase 5: Foam hardener -Not started
Phase 6: Paint -Not started

Learjet 45 Shell Foam Shaping Progress

…took longer than expected, but the Bondo finally cured, and I was able to fill the shell wall voids with foam. It was more than a little surprising that it took so many cans to get it done- 12 in all. The clerks at the local hardware store where I was buying all this spray foam were, not surprisingly,  giving me the twenty questions routine. I’ve learned that telling the truth in these situations is not always the best policy.

It needs to stabilize for a few days before I can start trimming and sanding it down.

Learjet 45 Simulator Cockpit Shell with Foam

Smelly and messy is all I can say about that stuff. Make sure you get some ventilation and/or wear a respirator when working with it.

In preparation for the foaming process, I am filling the grooves (fluting) I made in the outside of the hardboard wall pieces with Bondo to help strengthen and keep their shape if  things ever need to be disassembled. The filler foam will be sprayed on top of that and then shaped with hand tools and automotive finishing sanding blocks (used for body fenders and such).

Learjet 45 Shell (Now with Bondo!)

I decided to take a break from the interior for now. I’m just getting over a nasty virus and I need something to do where I don’t have to think too hard about it.

I’m attaching cardboard to the frame voids so the spray foam doesn’t stick to it. The foam sticks to the panels installed on the inside and they are removable.

I feel like I’m back in art class playing with toothpicks and glue.

Learjet 45 Simulator, Shell