24mm MD

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Lister
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Re: 24mm MD

Postby Lister » Wed Mar 23, 2016 4:32 pm

Too easy. I'll get the orange and see how it looks.. I think a buzzer would be a good way to find these.. they are very small in a big sky.

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Happy Heyoka
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Re: 24mm MD

Postby Happy Heyoka » Wed Mar 23, 2016 10:39 pm

Lister wrote:I think a buzzer would be a good way to find these.. they are very small in a big sky.


Which reminds me - what kind of battery are you planning to use for the EasyMini... maybe it's possible to kill two birds with one stone and keep the weight down too.

If you check out jaycar (search for "buzzer") there are a couple of them that are 20mm or less that don't need driver circuits (some will require an oscillator - that's not hard it's just a little circuit but more weight etc) which could just be hooked up to the main battery and beep continuously when it's installed.

You would just need to make sure your pyro battery is right voltage to also run buzzer... (eg: A23)

oh, and this has been done before - there's a thread about buzzers and recovery:
http://www.ausrocketry.com/forum/viewtopic.php?t=964

Jaycar have one of those personal alarms for about $10 - but it's about 30mm wide and about 30g; maybe it could be shaved....
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Lister
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Re: 24mm MD

Postby Lister » Thu Mar 24, 2016 8:23 am

I havent decided.. still waiting on stuff to arrive from the u.s before I can test fit it to see what space I have to work with.. would the buzzer and altimeter sharing a battery cause problems for the altimeter?

I can already see this isnt going to be ready for april unless the electronics arrive soon.

I have to order a few things from jaycar so I might as well get a couple of buzzers and the personal alarm and have a play

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Re: 24mm MD

Postby Lister » Thu Mar 24, 2016 3:39 pm

Viking wrote:Orange could be a goer!

:?:
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Viking
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Re: 24mm MD

Postby Viking » Thu Mar 24, 2016 4:42 pm

Lister wrote: :?:

Yes please! :D
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Re: 24mm MD

Postby TRFfan2 » Fri Mar 25, 2016 12:52 am

Lister wrote:
Viking wrote:Orange could be a goer!

:?:


That would be perfect! :D

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Re: 24mm MD

Postby Lister » Fri Mar 25, 2016 8:31 am

Too easy. Ill get some more orange then :)

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Re: 24mm MD

Postby Lister » Thu Apr 07, 2016 11:42 am

The MD from Charlie arrived today. It also had a little extra piece.. a shock mount that screws into the charge holder on the motor, Noel and I had the idea to do a very similar thing for the 24mm so it will be very handy.

Also my electronics for this arrived along with the rocket so now I just have to work out how to fit everything into such a small nose cone
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SpaceManMat
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Re: 24mm MD

Postby SpaceManMat » Thu Apr 07, 2016 12:41 pm

What motor case is it designed for? Can you show some picks?
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Lister
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Re: 24mm MD

Postby Lister » Thu Apr 07, 2016 2:00 pm

Its for 24 mm cti. The screw bites into the hole in the base of the charge holder.. holds it very well.
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jase
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Re: 24mm MD

Postby jase » Thu Apr 07, 2016 2:06 pm

Looks good 8)

Something to consider - how are you going to find this beast after she rips a hole through space and time? I reckon you need a tracker in there buddy. :wink:

Where you say gel coat, what type of gel coat are you using? Or am I missing something?
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Re: 24mm MD

Postby Lister » Thu Apr 07, 2016 2:24 pm

Im using a streamer and a 91db piezo to help find it. I couldnt find a tracker small enough except the teli mini but atlus metrum was out of stock when I ordered my electronics so I have the easy mini altimeter for it and dean is making me a circuit for the on off cycle for the piezo.

gel coat is a tinted coat of wests 105/206.. in regards to the blush we were talking about, the wests I have is clear.. there is no yellowness to the hardener at all and when it cures its transparent so have been using that to give me a layer of resin to wet sand and polish.

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jase
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Re: 24mm MD

Postby jase » Thu Apr 07, 2016 3:00 pm

Lister wrote:Im using a streamer and a 91db piezo to help find it. I couldnt find a tracker small enough except the teli mini but atlus metrum was out of stock when I ordered my electronics so I have the easy mini altimeter for it and dean is making me a circuit for the on off cycle for the piezo.


Cool, I used a REALLY loud buzzer once - still couldn't find it!!!

Lister wrote:gel coat is a tinted coat of wests 105/206.. in regards to the blush we were talking about, the wests I have is clear.. there is no yellowness to the hardener at all and when it cures its transparent so have been using that to give me a layer of resin to wet sand and polish.


Hrmm, I think you are confusing a 'process' and a type of 'product'. Gel Coat is typically a polyester resin and MEKP catalyst.

This crusty old video will demonstrate:



What I'm seeing, essentially, is you getting a gel coat type finish but not in fact using a Gel Coat.
Me and my rockets run on Moonshine.

Lister
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Re: 24mm MD

Postby Lister » Thu Apr 07, 2016 3:39 pm

I cant think of another word to describe what it is.. and from what I understood from the FG book i read when i started working wirh FG a gel coat can be anything that adds a resin layer to the surface.. doesn't need to be a specific product just a resin that gives a nice glossy finish. https://en.m.wikipedia.org/wiki/Gelcoat

But your right, its not a true gel coat, but until I get the real stuff this will do :)

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jase
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Re: 24mm MD

Postby jase » Thu Apr 07, 2016 3:52 pm

Hey, Wiki don't fly rockets son!!!

...come on now, who ya gunna trust more, me or wiki?
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