Turbine
Turbine
[Megan is talking to a wind turbine.] Megan: I'll hold up a big kite, and you blow air at me until I lift off! Megan: What do you think of that idea? Wind turbine: I'm not a huge fan.

A wind turbine uses wind to rotate its blades in order to generate electricity. It is visually very similar to an (electric) fan which however does the exact opposite: it uses electricity to rotate its blades in order to generate wind. The complementary nature of these two machines was previously highlighted in 1119: Undoing .
The punchline of this comic is a pun on the other meaning of the word " fan " which qualifies someone as liking or supporting something (here, an idea). Megan suggests to have the turbine blow air at her so she could lift off with a kite, something which would be conceivable with a huge fan, but is impossible here precisely because the turbine is not a fan and therefore can't generate wind. So the ( anthropomorphically -speaking) turbine's response is twofold: 1) it's a turbine and not a huge fan, which makes the idea impossible, and 2) for this very reason it doesn't like the idea - i.e. it is not a fan of the idea.
The title text alternatively suggests building a makeshift trebuchet . The idea is that when the kite's string gets tangled in the turbine's blades, the kite will be spun around and it will fling the attached rock (this setup is more similar to a traction trebuchet than to the more common counterweight trebuchet).
[Megan is talking to a wind turbine.] Megan: I'll hold up a big kite, and you blow air at me until I lift off! Megan: What do you think of that idea? Wind turbine: I'm not a huge fan.
