No problem. I said how to sub because some people don't know how. Glad you do! And that's how I made mine

@amoldymuffin that is the way I do it, there are several.

thanks man, i knew how to save subs, but i think i kinda figured out how to clip them while trial and erroring a design i am working on using fuselages. correct me if im wrong, but it appears that i should place a fuselage and prop, the lengthen saidfuselage to add the second prop without disturbing the first?

It is a conta rotating prop. They are fairly easy to make, as long as you know how to clip parts. mine use them if you want. Know how to subassembly parts? It lets you place parts that you have saved. To do it, put your cursor over the part. Then click the arrow. Then click the triangle and blocks. Enter a name and click save. Voilà!