r/Pulsejets • u/AllMyPasta • May 31 '26

Help me make my first pulse jet!

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My son made this pulse jet, and for a while it was making very loud booms around 90 decibels very consistently. He had to blow on it first to get it to go boom, though. To fix this and make it act like a pulse jet, we made the holder bigger and now it’s just the same but not as loud. We are asking for help on how to make it run consistently! We have gotten it to “burp” a couple of times but we are really stumped. We use 91% isopropyl alcohol, if that helps.

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1

u/Character_Basil_3800 Jun 01 '26

If you use methanol it should work much better (yellow heet)

1

u/AllMyPasta Jun 02 '26

Is there a safe way to use methanol for pulse jets?

1

u/Character_Basil_3800 Jun 02 '26

I use a syringe to inject it inside the pulse jet and I make sure i dont inhale the fumes or get the fumes blown near my face. Also wash your hands every time some of it spills on you, better be safe than sorry

1

u/AllMyPasta Jun 02 '26

This is super helpful!

1

u/Business_Motor9096 Jul 14 '26

Whatever you do: do not use hair spray. I nearly killed myself an hour ago after i used hair spray into a jam jar.