Good one. That's pretty much what I recall seeing as Da Vinci's helicopter drawing.

Good one. That's pretty much what I recall seeing as Da Vinci's helicopter drawing.

Sorry, I've enjoyed your other ones but I can't really see it. Actually, if you squint a bit, it looks like the cross section of a slow cooker with a rubbish lid!!

Sorry, I've enjoyed your other ones but I can't really see it. Actually, if you squint a bit, it looks like the cross section of a slow cooker with a rubbish lid!!

Comes pretty close. nice job

Comes pretty close. nice job