Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropack

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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Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropack

Postby kopius » Sat Aug 03, 2013 11:27 am

Australian Rocketry now has stock of the much anticipated Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropack.

These are perfect for minimum diameter rockets or where you simply don't want to use a retainer. Be sure to grab the optional 5/16 Stainless Steel Machined Eye-Bolt that screws on top: http://ausrocketry.com.au/motor-retention/minimum-diameter.html
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby drew » Fri Oct 04, 2013 4:48 pm

FYI it's worth looking at your forward closure on your CTI reload beforehand when using these internal retainers (which are AWESOME btw). I've flown a couple of L1030's and if I would have wanted to use them with this system I would have had to use the Cesaroni Pro54 Delay/Eject-Closure Adapter as the reload wasn't threaded. The K300 I bought at Balls was threaded though. I'm not certain but I would expect the thread to match these internal retainers. Unfortunately I didn't realise this until I was there so I had to use the Closure Adapter anyway.

Blake, has there been a change with regards to CTI 54mm plugged closures being threaded recently?
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby kopius » Fri Oct 04, 2013 7:18 pm

drew wrote:Blake, has there been a change with regards to CTI 54mm plugged closures being threaded recently?


I'm not sure, but let me contact CTI and find out.
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby OverTheTop » Fri Oct 04, 2013 7:34 pm

I recently purchased one of the 54mm adapters for another project, but looking at it a couple of weeks ago when presented to an L640. I was wondering if it would self-thread if "encouraged" enough. It looked like it just might!

I didn't need it on the day so I just flew the motor without having to use that system in the rocket.
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby CATO » Fri Oct 04, 2013 7:45 pm

Hi Drew,

I have recently purchased a CTI Pro 54 2285K260-P Classic and the forward closure is threaded...

CTI_Pro54_2285K260-p_FWD_1.jpg

CTI_Pro54_2285K260-p_FWD_2.jpg
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby cryoscum » Fri Oct 04, 2013 8:36 pm

Do you know whether the L935 has the same threading?
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby CATO » Fri Oct 04, 2013 9:14 pm

So I think the question here is, are all the new CTI "Plugged" motors also tapped? I'm not sure, but as Blake quoted, he may need to obtain this information from CTI. http://www.pro38.com/products/pro54/motor.php
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby drew » Sat Oct 05, 2013 12:39 pm

Hey CATO, thanks for the pictures. That's exactly what my K300 looked like as well.

Nic, I suspect new batches of the L935 will also have the same threading. Here's hoping Blake can confirm.
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby vk2icj » Sun Jan 26, 2014 10:52 pm

Hello All

I have been looking at these for my new 54mm CTI set. I was on Aeropack's website

http://aeropack.net/min_dia_retainers.asp

and noticed that these are not to be used for recovery purposes. OR am I reading that wrong.

"Adapters are for retaining motors to Aero Pack bulkhead retainers only and not to be used for attaching recovery hardware."

If that is the case then. Do the Bulkhead retainers require the motor to be screwed in for use in a recovery or can they on thier own be used for an anchor point.

My application is a 54mm min diam bird "Hawk Mountain Transonic II" but that kit has a rear retainer so in my mind it does not need the bulkhead retainer. I do not like the idea of epoxying the kevlar cord to the inside of the BT for long term use as shown in the destructions for the kit. I have the 54mm starter kit and the 6gxl case from CTI for motor selections. I doubt I would ever put an L into this min diameter bird but then again why not so I would not want to epoxy in a bulkhead that would not allow the use of that motor at some point. I know there are extensions for smaller motors but are those based on CTI lengths or Aerotech?


Any thoughts?

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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby ROCKet STAR » Mon Jan 27, 2014 2:08 am

Hi Chris,

I reckon that they state that it should not be used for attaching recovery hardware, as they have no control over the rockets it is used in, and therefor no idea as to what loads it would be subjected to. For 54mm minimum diameter rocket, I would imagine that it wouldn't see large enough loads to pull the threaded insert out. If somebody has a spent forward closure, it could be worth testing it it up to find out how large a load it can handle before it fails.

I had the same issue with a rocket I built a couple of years ago. I wanted to fly it on 54mm CTI motors, but was stuck with when it came to attaching the recovery harness, as my preference is always attaching the harnes to the motor's forward closure.

What I ended up doing was making a delrin plug that fits inside a casing spacer, and attaching an eye bolt...

Image

Image

Image

It worked really well, however it means that you need to use a longer case than the reload is designed for, and as such could not be used with the largest reloads in the longest case.
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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby vk2icj » Mon Jan 27, 2014 3:05 am

Thanks Chris

Yeah it would be interesting to test the breaking force on this setup. With the Closure adapter I wonder if it has more to deal with the motor casing or the threads for the bolt? I am not talking about the standard plugged motors if they are tapped but the Closure adapter by Aeropack. I am quite certain I have seen others use the Aerotech version for direct connecting the recovery cord. Looking at the case design of the CTI makes me wonder about the forward section strength under load if one were to have a late ejection charge or early for that matter.

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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby CATO » Mon Jan 27, 2014 8:13 am

Hi Chris,

The threads are very fine, they do however seem to "bite" in very well. I believe the purpose of these are for motor retention only. Good luck with the testing, I would be interested in the outcomes (sorry about the quality of the pics).

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"In thrust we trust"

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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: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby vk2icj » Wed Jan 29, 2014 12:48 am

Hey Guys

Found this

http://www.pro38.com/pdfs/Retainer_Endorsement.pdf

and it's clear statement not to use for recovery. I imagine the more I think of it is that the motor tube on the CTI stuff is curved and probably not rated to withstand the forces of recovery. I can't see why the threads would be an issue.

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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby vk2icj » Mon Feb 03, 2014 8:05 pm

Blake

I am looking all over the your site do you have these?

Image

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Re: Cesaroni Pro38/54 Delay/Eject Closure Adapter by Aeropac

Postby kopius » Mon Feb 03, 2014 11:26 pm

Unfortunately I don't have those at the moment. I can get some in though if you specifically want any?
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