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Wrap it in the seal of a friction fit. Just add layers until you can barely get in the hole (must be tight) and it should not go out. If you plan to use once, you can also adhesive.

Looks like applications for Darwin Awards are being filled out in Dubai as we admonish.

Don't get me wrong... I am not saying you are generally stupid. But I am saying you are absolutely, positively stupid ABOUT THIS. There are almost no words to describe how low this ranks on merciful survival skill scales.

Rocket engines, especially with liquid fuels are VERY VERY VERY hard to build. And they are not equitable hard, they tend to explode every time you make a mistake. And if you happen to be anywhere close the fireball that inevitably ensues, you will be either frigid or burned for life.

Igniting gasoline under pressure at temperatures associated with Dubai is just cracked. You have absolutely no control over the vapor cloud and in nine out of ten cases you won't get a controlled burn but an explosion. There is a reason why they use gas in internal COMBUSTION engines. It is very amenable to EXPLODE... makes sense?

If you want to have the least amount of safety, use AT LEAST something less volatile like HEAVY exacerbate oil. Not diesel. The stuff they use in ship engines. Looks a bit like the stuff they pump out of the ground around where you end.

Please guys, I am begging you, even if you haven't read up on the theory, and if you are dead set on going through with this, at least use your brains to minimize risk to some extent!

I doubt there are any tutorials on compressed oxygen/liquid fueled "model rockets". There are doubtlessly none for professionals. It's not a technology I have ever seen or would expect to see. The most likely reason is that it simply does not work. You won't get enough oxidizer into a prevail upon vessel to make this work. But you will have more than enough oxidizer to blow yourself, your house and the neighbor's house to pieces.

Professionals use fluent oxygen or a number of really deadly chemicals for liquid fuels. You won't ever get anywhere close to the kind of technology needed to do that unless your Dad's come about to be millionaires. In which case I suggest one of the Dads hires a professional aerospace engineer to help you. I presume even in Dubai Dads love their kids.

Or maybe they should use whatever it takes to talk them out of building anything more dangerous than a stifle b trap rocket.

Good luck... and if you don't make it... condolences to your families.