"Not gonna fly" in the Present Tense?

"Not gonna fly" means something that is being proposed or discussed isn't going to work. In the present tense you might say "it doesn't fly" but it's not really the same idea. In your ditty, "pie in the sky" is a fake or hollow promise. It doesn't go well with an actual baked pie that doesn't fly. It reads as more of a mixed metaphor.

Yeah. “He tries convincing his parents to let him go to the concert but it doesn’t fly”

Yes, it works and I understand what you meant, although I personally have never used this idiom in the present tense.

The dictionary says an informal definition of "fly" is "be successful". I honestly never thought of it as an idiom, and I think what you said sounds right. Maybe it's just because I've heard it more in conversation than in narratives, but something like "Around here, *that* doesn't fly" sounds more natural to me.

It doesn’t really make sense. And mixing literal with actual

It's a slight stretch, but when you're doing poems, you can make these sorts of slight stretch. Imagine someone in full steam anger mode. 'I WON'T ACCEPT THIS SORT OF BEHAVIOUR, IT DOES NOT FLY!' the meaning is clear, and it flows fine.

He works toward fulfilling his fantasy. It doesn't succeed. He is disappointed. If you used "not gonna fly" it would predict rather than report failure. Then the crying would be due to the prediction or need to become a prediction of crying.

that's an amazing pun and I'm sure it's fine to use here. Elsewhere I'm not so sure about.

Stop right now! That behavior doesn't fly in my classroom. Hey! That language doesn't fly around here. This is a workplace. Enough! Your bullsh!t excuses don't fly with me.

Hi OP, I'm an American and a writer. Your poem uses what's called the *historical present tense*; and is perfectly acceptable English. Another example of this tense in colloquial use could be, "So I walk into the bar and Bob says..." to describe something that happened in the bar at a previous time. This tense is used fairly frequently in storytelling and poetry, but ought to be avoided in other academic or scholarly works. Well done.

'Not gonna' is actually 'Not going to' so I guess it's in the future tense

“It doesn’t fly” works. It don’t fly That plan don’t fly That thought don’t fly I grew up in deep south Florida and it was common to hear stuff like this from people.

The rhyme is pretty clever, but especially following "pie in the sky", putting the idiom in present tense makes me read it literally. Which makes for a fun nursery rhyme! I like moving from the metaphor of pie in the sky to literally a pie flying through the air. But I would not make the connection to "not gonna fly" if you hadn't explained it in the post.

“It doesn’t fly” is technically correct. I don’t see this idiom used in this particular context often though. When something “flys” I think of it as just barely getting by, “that didn’t fly” means you tried but it just about didn’t work. So I don’t often think of it in the context of a competition. But for a silly rhyme it does get the point across and makes a fun story.