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So I flew my first DMS today and really enjoyed it. I have always been a reload kind of guy ever since I started flying AT motors but lately I have been looking for the quick and easy. I flew a G72DM and what a treat it was. Super easy to prep for flight and the motor performed admirably. I will be flying more in the future for sure as I really enjoyed it.
 
Has anybody heard when the new aerotech rocket is coming out. I saw it in the Sport rocketry magazine and I think it's called the mega initiator with a 54 mm motor mount.
 
Good afternoon, i was wondering if anyone had access to the characterization numbers for AT propellants specifically for white lightning, i would like to plug them in to burn sim. I was also wondering about what are acceptable case pressures for reloadable motors. Any help would be appreciated.
 
Good afternoon, i was wondering if anyone had access to the characterization numbers for AT propellants specifically for white lightning

You can find the characterization numbers for each propellant under here:


https://www.rocketmotorparts.com/Propellant_Grains/cat1577810_1952798.aspx


For example- this one for white lightning:


https://d1f7geppf3ca7.cloudfront.net/origin/170652/rcs_8225w_propellant_data.jpg


Note- Aerotech tends to use some sort of plastic/phenolic nozzle which erodes a tiny bit as it burns..
 
Has anyone successfully ordered and received G8 (16.6 seconds burn time) motors this year?

I can't seam to find them at any of my usual HP vendors (WM, BPS, Sirius).

Have they been pulled from production?
Manufacturing constraints?

TIA
 
Has anyone successfully ordered and received G8 (16.6 seconds burn time) motors this year?

I can't seam to find them at any of my usual HP vendors (WM, BPS, Sirius).

Have they been pulled from production?
Manufacturing constraints?

TIA

They were decertified and anyone who bought them & still has them in possession can only use them at TRA research launches.
 
On a completely different note...
Does Aerotech make "demo" motors? Like a transparent or cutaway plastic motor? Something I could use to teach/demo with?

We have a really nice 54mm cut-away we have been using for educational purposes but just that one. We are currently exploring the production of 6-12 more of various sizes for this reason.
 
I'm planning a flight on a K535 disposable with a maximum delay of 14 seconds. A rough simulation puts my optimum delay at around 16 seconds. In this case is the best thing to do not use any ejection charge at all in the motor and just rely on the apogee charge from the altimeter? A backup would be nice but in this case looks like it might do more harm than good.

Your best shot would be electronics at this point. They're actually pretty fun eventually.
 
I know this question wasn't directed at me, but I had the same experience last year on my L3 flight, as a matter of fact. I also followed the directions carefully, but I believe there was an ambiguity in the instructions at the time where the instructions don't indicate how much the forward closure needs to be recessed into the motor case. It turns out, there needs to be at least a 1 inch thick ring of epoxy. Mine ended up being much less than that even though it felt like the forward closure was in as far as it would go.

What rocket were you using the motor in? I was flying a wildman extreme and used three centering rings. The forward closure failure failed with enough forced that it essentially deployed the ebay and everything "north" of it out of the way. The damage ended up being confined to the booster section forward of the forward-most centering ring, resulting in a fairly straightforward repair. Good luck!

The most common cause is that the closure isn't set all the way into the liner and therefore it's not sealed. We are updating the instructions so that the closure is seated in the liner before it is put into the casing. This allows the user to verify that the closure is sealed beforehand.

The other possibility is that the casing wind angle was not correct and the dealer did not include the motor in the casing recall so the flyer never got the notice.
 
I realize this question may have been asked previously, but since business policies can change I will ask at this time…. It has always been my understanding that AeroTech will replace a reload and its case, as necessary, if a reload fails (e.g. CATO) under warranty at no charge. Does this apply to “AeroTech by Dr Rocket” cases as well? Specifically Dr. Rocket cases imprinted the RMS Trademark?

Yes, we will supply the reload and any motor hardware as well assuming it was a manufacturing issue.
 
He drew the short straw for dealing with us yahoos

Man I love hanging out here with you guys...a lot of good stuff on here. During the launch season though it has become increasingly difficult to get on here like I used to. Will try and visit more often now that the season is over.
 
Hey ATGM-

I saw the M2200X pics from LDRS 38 on your Facebook page. Any estimate when this will be available?

I'm really looking forward to seeing the thrust curve too... :) How does it compare with the M1297 for total impulse?

We have heard that they are testing it at TMT this weekend! Should be available in January along with a handful of other loads.

The M2200X has a shorter burn time but it uses a higher ISP propellant so it has a bit more power. It really jumps your rocket off of the pad.
 
Hey Charlie,

Are there any plans for a 54 or 75 mm stainless steel seal disk? With the hotter loads AT has been putting out (read: ST and X), it seems my aluminum disks aren't lasting as long...

On a similar note, provided that the o-ring sealing surface on a seal disk isn't scratched, pitted, or otherwise compromised, are there any issues with flying beat-up seal disks? What should we be looking for that would indicate that it is time to replace?

Thx!
-e

The 75mm Stainless Steel Disc is in stock (P/N 75FSDSS) and we are looking at the 54mm next.
 
Has anybody heard when the new aerotech rocket is coming out. I saw it in the Sport rocketry magazine and I think it's called the mega initiator with a 54 mm motor mount.

Took a little longer than expected but they are shipping now. There's one dealer who preordered them so he has them in stock.
 
Charlie, how about 38mm hardware, I am still waiting on replacements from a I59 cato back in April/May? I know you guys have been backlogged. Curiousity on my part as you guys have always made good on warranty stuff.
 
Charlie, how about 38mm hardware, I am still waiting on replacements from a I59 cato back in April/May? I know you guys have been backlogged. Curiousity on my part as you guys have always made good on warranty stuff.

Hey Rich it looks like the end-burning closure is the hold up and those are being ran now.
 
I saw some cool static test videos on the AT you toob channel !

The J99 and the H238ST

Kenny
 
Your best shot would be electronics at this point. They're actually pretty fun eventually.
Thanks for the reply. The "K" motor flight is still in the future. So,with this motor just leave out the election charge and let the electronics handle the deployment?
 
Your explanation demonstrates your ignorance of the situation and failure to read the very posts you are chastising me about. First, I did not need an "immediate answer" and in fact said so. Second, while it's good to hear about others experiences it's not "official" and why I asked about "policy" in a public forum. One very well respected officer in TRA expected just the opposite of what Charlie has explained, so this is good news other may need to know. Third, I spoke in person with an AT employee (not Charlie) at LDRS and was not provided an answer at that time. So before you take it upon yourself to chastise customers and potential customers of AT, for no good reason, maybe you should read ALL the related post and make some private inquiries as you are not helping them sell rocket motor.

This thread, posts 3,133-3,153 Nothing wrong with your questions, just took your post # 3,205 as to blame Charlie for you missing out on the purchase of a case.
 
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This thread posts 3,133-3,153 Nothing wrong with your questions, just took your post # 3,205 as to blame Charlie for you missing out on the purchase of a case.

In an effort to be constructive ... the AeroTech warranty statement is silent on the industry practice of replacing motor hardware damaged by a defective reload. So Charlie is not "to blame" as you put it. Ideally AT should update the RMS™ Reload Kits section of the warranty statement to clarify what AT will do when a defective reload, under warranty, damages any case authorized for use (e.g. Dr Rocket, CTI cross loads, etc…).
 
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