AeroTech Open Thread

Discussion in 'Propulsion' started by ATGM, May 16, 2015.

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  1. Feb 7, 2019 #2,821

    Nytrunner

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    They're probably filling vendor orders before their own web stock.

    Check Wildman, CSrocketry, OffweGo, etc....
     
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  2. Feb 7, 2019 #2,822

    Luzwingnut

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    Thanks, Nyrunner.

    Looked over the "Aerotech Open Thread" and found another forum member raising this very concern on/or about Jan. 25, 2019.

    https://www.rocketryforum.com/threads/aerotech-open-thread.125657/page-94

    Seems odd that a product such as the Aerotech 29mm hardware case, a mainstay in the MPR field with F, G, and baby H power systems, would NOT be better stocked and/or supply chain is not better managed.

    "We can sell you the rocket, but you'd like to purchase the motor, too??"
    (Kinda like going camping and forgetting the matches).
     
  3. Feb 7, 2019 #2,823

    Nytrunner

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    If you read over the thread (yeah that's big task lol), you'll learn more of why there's a hardware shortage. From fabricators exiting the business, to backed up vendor orders, etc...

    Most of their orders come through the vendors across the country, so it does make sense to try and keep them supplied as best they can. It's a small hobby with very unpredictable logistics, so some patience helps.
     
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  4. Feb 7, 2019 #2,824

    Luzwingnut

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    Fair enough.

    Nyrunner?
    May I share your reply and explanation on my current thread at "Aerotech 29/40-120 OOS?"
    Thanks.
     
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  5. Feb 7, 2019 #2,825

    Bungie64

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    Nytrunner, I have checked all sites I can find and no one has any. Apogee, Sirius rocketry, Wildman, Chris' rocket supply, balsa machining services, Off we go..etc
    They simply aren't producing any. For my 38/360 case I had to get the parts from 3 seperate sources at a higher cost juat to get what I needed. The case and adapter system I got from Apogee, the rear closure from Balsa machining services and the front closure and seal disk from a guy on facebook.
     
  6. Feb 7, 2019 #2,826

    3stoogesrocketry

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    Aerotech's main problem has been production of hardware for a while now. Why they have not found a shop that can keep up with production ( or AT pony up and by x amount of hardware ahead of time instead of waiting till y amount of orders are placed and then they are rushed to get z amount made ) is beyond me.
    Rant off , and no , this is not a bash against AT.
     
  7. Feb 7, 2019 #2,827

    jjwb22101

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    I try to be patient, but when my onsite vendor has had zero 29 or 38mm reloads for the last 6 months, and backorders take 6+ months to fill, I start to lose my patience. For example, my school placed an order in September for motors for our competition (6 G75's and 6 I600's), and the order just came in yesterday. This has pushed the schedule for this project back a full two months, and we are now going to be hard-pressed to get everything tested before the competition.
     
  8. Feb 7, 2019 #2,828

    afadeev

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    I keep re-reading the same complaint template in these threads: Vendor-X doesn't have everything I want, therefore it's AT (or CTI, or some other manufacturer's) fault.

    Have you explored online sources as an alternative?
    Vendor / supply-chain management is a skill, and going with the first one you find nearby may, or more frequently may not, be the best course of action.


    Perhaps, there is something not right with your onsite vendor?
    :rolleyes:

    Wildman, BMS, and Sirius both have G75 and I600 motors in stock:
    https://wildmanrocketry.com/search?q=G75
    http://www.balsamachining.com/
    https://www.siriusrocketry.biz/ishop/aerotech-g75j-10a-29mm-reload-kit-hazmat-303.html

    a
     
  9. Feb 7, 2019 #2,829

    Luzwingnut

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  10. Feb 7, 2019 #2,830

    rharshberger

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    Your link goes to a general blog header, not a specific section. The "shortage" complaint comes up frequently and usually someone is able to point the individual to a source that has X product available, maybe not at a cheap price but available. As to pricing the cost of materials has taken a jump over the last few years and it becomes necessary to raise prices. 10 year old prices are not viable for businesses even if its an entry level product for hobbyists.
     
  11. Feb 8, 2019 #2,831

    roytyson

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    Just got my 75/7680 and 54/1760 case from Wildman. Gave me goosebumps!
    [​IMG]
     
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  12. Feb 8, 2019 #2,832

    jnobels

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    “International” rocketeers often have very very few vendor options (I can can count my options on 2 fingers) and I seriosly doubt my vendor is the problem. It simply takes months or years for aerotech to fill orders and the quantities are limited when they do. Importing casings is possible, but really expensive.

    The struggle is real. I lost my only 29mm casing in the fall and procuring a cost effective replacement seems unlikely for this flying season.

    Disposables it is I guess. CTI is tempting, but (luckily for aerotech) the last time I checked their 29mm loads were pricier than the ~equivalent aerotech su motors.
     
  13. Feb 8, 2019 #2,833

    Bungie64

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    I lost my only 29/40-120 last june and just now found a replacement. I contacted Aerotech months back and was told it was a manufacturing problem. They were having issues with the company they were partnered with and were looking for a new manufacturer. So it is a supply issue on Aerotech's end.
     
  14. Feb 9, 2019 #2,834

    slothead

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    I really like the looks of those Dark Matter exhausts. It gives the impression of a real Sci-Fi movie! I'm going to be looking for Dark Matter motors in the future.
     
  15. Feb 10, 2019 #2,835

    slothead

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    Hey Charlie,
    How do I buy the forward seal disk O-ring (#00025) by itself? Otherwise I have to spend a minimum of $14.95 for a motor kit which seems a bit high for a 1.3" x 1/16" o-ring!
     
  16. Feb 10, 2019 #2,836

    jimzcatz

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    Which specific oring? I get mine from McMaster.
     
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  17. Feb 10, 2019 #2,837

    Dave A

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  18. Feb 10, 2019 #2,838

    slothead

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    It is the one Forward Seal Disk O-ring 1-5/16" x 1/16" 025, but Aerotech identifies it differently on the 38-720 motor assembly drawing. On that drawing it is described as find #10, part number 00025, (1.313" X 1/16"). The only real difference in the ident is the “1.313 (versus 1-5/16), but that’s pretty damn close if not exact. Thanks for the tip on McMaster.
     
  19. Feb 10, 2019 #2,839

    Rocketjunkie

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    O-rings come in standard sizes known as dash numbers. The last 3 digits of the Aerotech part number is the dash number, in this case -025. All dash numbers starting with 0 are 1/16" thick, 1 are 3/32" thick, etc. This McMaster page https://www.mcmaster.com/o-rings lists the O-rings in dash number order and gives the nominal and actual sizes. Click on the first entry, oil resistant Buna o-rings.
     
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  20. Feb 10, 2019 #2,840

    gldknght

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    Actually, when you compare the cost of At hardware (way very much higher) vs. the cost of Cti hardware, and the cost of At reloads vs. the cost of Cti reloads (slightly more expensive), the Cti systems are much less expensive overall.
     
  21. Feb 10, 2019 #2,841

    slothead

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    Thanks for this info rocketjunkie - I learn something (however minuscule) every day and thank everyone for their contribution. Thanks again, Tom
     
  22. Feb 11, 2019 #2,842

    Ez2cDave

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    ( 1 ) They could use multiple shops to produce hardware in sufficient number.

    ( 2 ) Perhaps there are "cash flow" problems at Aerotech . . . Not a good sign !

    Dave F.
     
  23. Feb 11, 2019 #2,843

    Ez2cDave

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    Outsource hardware manufacturing to China . . . Cheaper, faster, volume production would not be an issue !

    Dave F.
     
  24. Feb 11, 2019 #2,844

    3stoogesrocketry

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    Dave as a tradesman , I highly disagree , and believe this to be one of the biggest problems we are facing . Cash flow should not be a issue , look what has been spent developing the new abcd motors . Aerotechs main problem I will go out on the edge of this cliff , and just say , their machinists suck , bad . I will stop my rant before anybody thinks this is political or a bash against Aerotech.
     
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  25. Feb 11, 2019 #2,845

    Ez2cDave

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    The bottom line is that Aerotech is unable to supply hardware and reloads in sufficient quantity, and has been for quite some time.

    So, either they outsource, get numerous outside machine shops involved, or release the rights to the RMS hardware, so that "independent contractors" can produce the products.

    As for the insufficient number of reloads, that is another major problem.

    If "cash flow" isn't an issue, why aren't they "stockpiling" hardware, rather than waiting for enough, pre-paid, orders for a "batch run" to be made. Also, why are reloads in such short supply ?

    Dave F.
     
  26. Feb 11, 2019 #2,846

    tbonerocketeer

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    Aerotech hardware is selling faster than the machinist supply. I've heard from other places that the aluminum tubing is having a many month lead for Mill run....and by many month I mean 7 plus. I just visited Aerotech and they are wide open, working 6 days a week.
     
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  27. Feb 11, 2019 #2,847

    BF Rockets

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  28. Feb 12, 2019 #2,848

    Ez2cDave

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    What about the low availability of reloads ?

    Dave F.
     
  29. Feb 12, 2019 #2,849

    tbonerocketeer

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    What specific reloads?
     
    Last edited: Feb 12, 2019
  30. Feb 12, 2019 #2,850

    Ez2cDave

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    Here is one example . . . Look at the low number of reloads in stock, throughout the range.

    http://www.the-motorman.net/6473.html

    Dave F.
     

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