Micro-Hybrids

Discussions on hybrid rocketry including rockets, motors and technologies.

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Micro-Hybrids

Postby astroboy » Fri Apr 27, 2007 10:10 pm

Hey Avachovy, do you have any pics or drawings for your micro? There are a few people here who would be very interested in how it is dimensioned and put together. :lol:

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Postby Avachovy » Fri Apr 27, 2007 10:15 pm

well i dont personally have a micro as of yet, its going together soon. Ive got friends who own a engineering shop so im going to get them to do it

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Postby Avachovy » Fri Apr 27, 2007 10:19 pm

Image

thats the basic idea i was going on. I'm also going to try and design one that uses those new to aust 16g bulbs

oh yeah, the other handy thing is that this one uses snap rings and its a monotube design so it inserts like a regular motor

http://members.iinet.net.au/~fcollier/c ... 394918,s=0

that design uses screws which can be messy to try and put into a rocket. But its still a brilliant system

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Postby astroboy » Fri Apr 27, 2007 10:22 pm

I have a nice little program that will help size the injector and nozzle as well as culculate performance if you dont already have one....... The figures will only be approximate of course, but it gives good ball-park figures.
Flick me a PM if you want it. Although you may already have a copy, its floating around on the net.

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Postby Avachovy » Fri Apr 27, 2007 10:27 pm

is that the HDAS v1.6? its and excel spread sheet. Thats the one i have

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Postby astroboy » Fri Apr 27, 2007 10:53 pm

Yup! Cool, ive been playing around with that. It would be nice to see how close the sim is. Have you got a thrust stand?

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Postby Avachovy » Fri Apr 27, 2007 11:04 pm

yep, its real technical!

Image

:lol:

i havn't actually played with that sim yet, though i do have another hybrid motor just itching to be tested! all i need is a BOC accout to get some nitrous oxide

Image

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Postby astroboy » Sat Apr 28, 2007 12:02 am

Mmmmmm nice.............

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Postby astroboy » Sat Apr 28, 2007 12:08 am

Have you looked at the DATAQ ??. If you are registered to ebay you can build a data aquisition system for under $100 with loadcells..
I can build you an insrumentation amp if you need one, and pressure transducers for chamber pressure can be got for $20.

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Postby Avachovy » Sat Apr 28, 2007 12:56 am

i havnt really looked into electronic as of yet, not quite up to that stage yet. But it still would be handy to have

yeah, that hybrid that ive got, 70 pounds of thrust per second for 7 seconds, that thing is gunna send a rocket real high! just need to wait until NSW rocketry club sorts its stuff out

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Postby kopius » Sat Apr 28, 2007 10:51 am

That is very kewl.

Are they your pics on the other forum? or just linked to someone elses build?

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Postby Avachovy » Sat Apr 28, 2007 10:53 am

nope, they arnt mine. But that shows you the basic ideas/concepts of it

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Postby ~RR~ » Wed May 09, 2007 7:13 pm

I couldn't find any Krytox on the net here in Aust, but I did find this lubricant at my local hydraulic shop. On the promo box it said it is O2 safe, for dive masks.

Image
Image


It's not KRYTOX, but it only cost $6.25 for 30 grams. Here's the Aust web site.

http://www.inox-mx3.com/inox.htm

Under Products MX6, also there's MX8 both say they are High temp & pressure. Guess I wont know till I try it.

But It's not Krytox, I did find some on ebay, bit expensive though.

http://cgi.ebay.com.au/Krytox-Aerospace ... dZViewItem

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Postby Avachovy » Fri May 11, 2007 6:44 pm

i don't know why its so expensive! the only reason things are 'oxy' or N20 safe is because they wont burn. RVT silicone wont burn, and its way cheaper. But don't quote me on that one, thats just my understanding of it all

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Postby ~RR~ » Fri May 11, 2007 7:07 pm

Yeah i wouldn't use this stuff on a expensive commercial motor, on a micro i would.

have a read of number 4 on this link http://www.ukrocketman.com/rocketry/hybridhelp.shtml


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