10 shot cake and bp rocket(plug blew out).wmv

here is a 10 shot cake and bp rocket,the rocket didnt reach my expectations because if you didnt realise,the nozzle blew out and thats why it didnt reach its full height,when i had a look after i found the rocket casing and i just as i thought there was no nozzle,but at least no1 else noticed :p plus they all enjoyed it(as you can hear lol)

Category:

Howto & Style

Tags:

• twitch738
• fireworks
• pyro
• pyrotechnics
• rocket
• bp rocket
• 10 shot cake

[HENNESSYthe1]

tried ta mek em luk gd by wrappin christmas paper round em ahaha, sik though

[twitch738]

@HENNESSYthe1 yehh lol cant beat wrapping paper :),thankss

[gandelff999]

really good fella, shame about the end plug, think the pressure is too much though as per your cato, try using a drill size 1mm larger for your next ones though, header was really good on the rocket though, great vid all in all, loved the cake too

[twitch738]

@gandelff999 i will do next time,how big do you think the nozzle should be?

[twitch738]

I was way of with the weight it turned out to be around 157grams which is about 5 oz i think

[pyr0ph1L]

Wow. That was really nice! sad with the rocket, but even though it didn't work as planned it was really beautiful! :P .. And the cake was awesome.

[vanalec]

Sickk one (H)

[firewheelmanpsl]

shit happens wont be the last,dont stop now mate

[gandelff999]

finally dont worry too much on the stick balancing thing, the rocket is heavy at ground level, by the time its thrust has half gone its straightened out, me personally i wouldnt of bothered with that second stick and just accepted a slightly top heavy rocket,there the best ones, when you dont know where there going to end up ha ha ha(though i'm sure i will burn in hell for that last statement)

[gandelff999]

the bulkhead rule of thumb is half the size of the inner diameter in length for the thickness of the plug, and use the 2mm drill bit for the header fuse though you already have this sussed i take it

[gandelff999]

depends on the size of tube your using for the motor, if its the 3/4" one form the shop then the length of the plug/exhaust nozzle should be that of the diameter of the tube,so if its 3/4" inner diameter make the nozzle 3/4" on length, and for the nozzle use a 8mm drill bit ,just mark off from the tip of the drill using white pvc tape or masking tape the 60mm point, you need to give the gases chance to escape but at the same time letting them build up ,bit trail and error at times

[murdoch2486]

very impressive mate

the audience seemed pleased!

5*