Now for the motor mount.
The parts:
Semroc includes a thick walled engine mount tube, which was a pleasant surprise. However, they made up for this initial joy by including a damaged tube- there was a small tear in it as if some clown had dropped an x-acto on it at the Semroc factory. (No offense intended) This can be repaired by putting toothpaste in the area and allowing it to dry.
There is also an engine hook. It turns out that Legos aren't the worst thing one can step on that's lying around on the floor. That honor goes to land mines, but engine hooks are close following.
The engine block is extra long for that much needed tail weight, but in order to provide proper ducting action you might consider using an 18mm motor with the engine block knocked out instead. Don't worry about skywriting, I think stability can be purchased separately but Semroc doesn't have it listed so it's probably out of stock.
Semroc also includes a sheet of 6 pop-out wedding rings, because you're gonna need all of them and more. Well,
you might not. But yours truly may. It's always good to know that the rocketry manufacturers have your romantic interests in mind, however fruitless they may be. You may want to consider CAing them to your fingertip, so you can get them back for reuse.
It is, however, unfortunate that amid all these thoughtful and considerate gifts, Semroc forgot the four centering rings that create the ridges on the motor tube. Don't worry, they're easy to cut out. Hopefully you still have the first aid kit from the previous step. You can cut them with pliers and a ripsaw if you're blind to faults, but for the best results, I recommend using many light passes with sharpened pencil. You'll get there.
This goes together as usual: cut slit for engine hook, insert engine hook, push engine block in through rear, apply glue to engine block's destination, find out motor doesn't fit anymore, cut off tab, end up friction fitting. Then glue on four centering rings. Use the cover card as a reference, it doesn't matter where they go though since the model will end up in the kindling bucket anyways. I mean, it'll end up stuck in a tree or dangling from a power line. Then wrap making tape around where the engine hook goes into the body tube until it matches the inner diameter of the 24mm tube.
It's quite difficult to come up with bad things to say. Next post I'll post what I did, but I'm too tired now and have some barbed wire to make. Don't ask unless you're curious about it, because if you do ask, Google AdChoices will likely hammer you with "Barbed Wire Choker" ads, should they exist. Also, for those not forced to spend about 8 hours a day with fashion obsessed middle schoolers, a choker is a piece of jewelry that people wrap around their necks. I don't know why either.
Attached is a picture of my modified engine mount inside the other piece. Not glued yet, as per instructions (I followed them to the gist).
op:
