Aeropack Retainer Centering Rings

This is for all Australian Rocketry orders to RCS/Aerotech, PML, LOC/Precision, Always Ready Rocketry, G-Wiz Partners, Cesaroni pro-X, Animal Motor Works, Altus Metrum

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kopius
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Aeropack Retainer Centering Rings

Postby kopius » Thu Dec 05, 2013 8:14 am

Australian Rocketry is happy to announce we have started manufacturing specialised Centering Rings for Aeropack Universal Retainers.

Made from ~12.5mm/½" ply, these rings are machine cut to ease the installation of the 54mm, 75mm and 98mm Aeropack Retainers.

We have already had some great feedback on these items and they are available for immediate shipment: http://ausrocketry.com.au/centering-rin ... r-crs.html

Image

** Due to the threaded insert holes on the 75-54mm and 98-75mm centering rings being close to the edge, some cracking may appear. It is recommended that the ring is installed in the rocket before screwing in the the threaded inserts.
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Re: Aeropack Retainer Centering Rings

Postby matthew » Thu Dec 05, 2013 7:44 pm

Those look great, Blake. I'll be up for one, for sure. Just wondering if it's possible to get an 11.5"-98mm one with my other order. Also, do you have packs of inserts to go with them? :D
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Re: Aeropack Retainer Centering Rings

Postby CATO » Fri Dec 06, 2013 6:35 am

Matthew wrote:Also, do you have packs of inserts to go with them? :D

Matthew, whilst you receive a set of threaded inserts with the AeroPack Retainer, I raise the question, in an ongoing effort to reduce costs, is it possible to reuse the same AeroPack Retainer on multiple rockets just by unscrewing the retainer, and switching it to another rocket (i.e. can you get away without gluing the retainer to the MMT/CR)? If you can reuse the retainer then the questions stands, Blake, do you sell spare / replacement sets of threaded inserts for each AeroPack Retainer type?

Sorry if this seems like a dumb question, but I have never utilised a retainer that has holes for mounting before...
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Ns 17: 5,973; 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
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Re: Aeropack Retainer Centering Rings

Postby kopius » Fri Dec 06, 2013 7:22 am

matthew wrote:Those look great, Blake. I'll be up for one, for sure. Just wondering if it's possible to get an 11.5"-98mm one with my other order. Also, do you have packs of inserts to go with them? :D


Most definitely. The current machine has a 600mm/24" x 900mm/36" bed. I will also be releasing a custom cutting guide shortly too, so people can give specific details for special projects and clusters etc.

As CATO said, each retainer comes with the necessary screws and threaded inserts.

CATO wrote:I raise the question, in an ongoing effort to reduce costs, is it possible to reuse the same AeroPack Retainer on multiple rockets just by unscrewing the retainer, and switching it to another rocket (i.e. can you get away without gluing the retainer to the MMT/CR)? If you can reuse the retainer then the questions stands, Blake, do you sell spare / replacement sets of threaded inserts for each AeroPack Retainer type?

Sorry if this seems like a dumb question, but I have never utilised a retainer that has holes for mounting before...


No such thing as a silly question.

Firstly, with regards to switching Universal retainers, I personally would not like to do that as they can be touchy because they don't physically mount over the top of the MMT like traditional retainers. I guess you may also face the possibility of stripping a thread if you change them too many times. Because of this, I don't currently stock the threaded inserts separately, however in saying that, I am more than happy to look at this when I next replenish our Aeropack stock.
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Re: Aeropack Retainer Centering Rings

Postby cryoscum » Fri Dec 06, 2013 7:45 am

You could use modified T-nuts instead of the threaded inserts, but only if you have a lot of room on your centering ring (as opposed to boat tails and near-minimum diameter stuff).
The threads are finicky and I tend to not move the retainers around at all unless the rocket has been decommissioned. Besides, if you're building a rocket that will fly on a 4" motor, the cost of the retainer is less important.
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Re: Aeropack Retainer Centering Rings

Postby CATO » Fri Dec 06, 2013 10:01 am

Thanks guys....
"In thrust we trust"

AMRS 21 L3
TRA 07459 L3

Impulse:
2018: 14,767 Ns (44% N)
Ns 17: 5,973; 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
PB - Gorilla N2717WC, H: 10,260', S: 1.14M

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Re: Aeropack Retainer Centering Rings

Postby matthew » Fri Dec 06, 2013 6:32 pm

kopius wrote:Most definitely. The current machine has a 600mm/24" x 900mm/36" bed. I will also be releasing a custom cutting guide shortly too, so people can give specific details for special projects and clusters etc.

As CATO said, each retainer comes with the necessary screws and threaded inserts.


Excellent!
Matthew Small
AMRS #33 L3
TRA #11466 L3
QRS #133


http://australianrocketry.org


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