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  1. #91
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    31st December 2009
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    Las Cruces, NM
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    1,443
    Quote Originally Posted by ksaves2 View Post
    Ahhhhhhhh, I think motor dimensions aren't really an issue out in the open, but agree that the "inner workings" would best be left to the Research section if one doesn't want to be censored.

    Cripes anyone can buy any size motor casing they want. Without a C-card or their own private venue to make propellant they're out of luck as far as filling the case with something that works.

    Kurt
    Ummm, you should read my message again. "Copying the casing is the easy part". If anyone wants to start a Research thread on the topic, I'll discuss the not-so-easy and not-so-obvious parts.

    Even if someone has a "C-card", whatever that is, and a venue to make propellant, 9 out of 10 they'll junk a lot of hardware trying to clone these long reloads.

    -John

    NAR/TRA L3
    My LinkedIn Profile

  2. #92
    Join Date
    21st January 2009
    Location
    Glendale, Arizona
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    1,813
    Since John doesn't know either I will ask.
    What is a C-card?

    M


  3. #93
    Join Date
    27th July 2014
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    south beloit, IL
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    2,291
    Quote Originally Posted by jsdemar View Post
    If anyone wants to start a Research thread on the topic, I'll discuss the not-so-easy and not-so-obvious parts..
    done
    NAR# 99285
    Tripoli# 16283
    L1- 4/26/2015 Madcow Cowabunga- H123SK
    L2- 11/1/2015 Wildman Darkstar 2.6- J355RL
    L3- 11/3/2017 Wildman V2 6" - M1780NT
    Woosh
    QCRS

  4. #94
    Join Date
    30th January 2016
    Location
    US > OK > NE
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    3,493
    Quote Originally Posted by jsdemar View Post
    Old thread brought back to life?

    There was an I800 in 29mm.
    Quote Originally Posted by pyrovette20 View Post
    Or try a little J motor.
    Quote Originally Posted by pyrovette20 View Post
    No idea how fast .It is a Kosdon J604 slow propellant.The fast comes in around a J1000. Just a 5' fiberglass tube and fins. Now I gotta make a tower for it.
    Was the i800 36in long?

    Last edited by dhbarr; 11th January 2018 at 04:10 AM.

  5. #95
    Join Date
    31st December 2009
    Location
    Las Cruces, NM
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    1,443
    Quote Originally Posted by dhbarr View Post
    Was the i800 36in long?
    I don't know of any Kosdon stock 29mm case that was 34" long. I think the I800 case was ~29" long. That would be one more grain longer (5" grains).
    -John

    NAR/TRA L3
    My LinkedIn Profile

  6. #96
    Join Date
    8th December 2009
    Location
    CA
    Posts
    1,910
    Kosdon I800...







    Tony
    Attached Files Attached Files
    Last edited by tfish; 11th January 2018 at 05:28 PM.

  7. #97
    Join Date
    18th January 2009
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    1,495
    Quote Originally Posted by jsdemar View Post
    9 out of 10 they'll junk a lot of hardware trying to clone these long reloads.
    hehe, yeah. I've seen guys who made motors for years have to reconsider what they think they know.

  8. #98
    Join Date
    27th July 2014
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    south beloit, IL
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    What's going on with the ends of these grains? Are they inhibited, or just some funky casting going on?

    Click image for larger version. 

Name:	1-11-2018 10-29-37 AM.png 
Views:	54 
Size:	510.2 KB 
ID:	335927
    NAR# 99285
    Tripoli# 16283
    L1- 4/26/2015 Madcow Cowabunga- H123SK
    L2- 11/1/2015 Wildman Darkstar 2.6- J355RL
    L3- 11/3/2017 Wildman V2 6" - M1780NT
    Woosh
    QCRS

  9. #99
    Join Date
    8th December 2009
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    CA
    Posts
    1,910
    see post 43 in this actual thread...

    http://www.rocketryforum.com/showthr...42#post1437242

    Tony

  10. #100
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    31st December 2009
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    Las Cruces, NM
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    Quote Originally Posted by djs View Post
    What's going on with the ends of these grains? Are they inhibited, or just some funky casting going on?

    Click image for larger version. 

Name:	1-11-2018 10-29-37 AM.png 
Views:	54 
Size:	510.2 KB 
ID:	335927
    You haven't been reading the details of my posts. That is the inhibitor/insulator on the end of the bottom grain(s) in Kosdon's long motors. Think of it as a shock absorber. In Burnsim, you need to inhibit one end of the grain.
    -John

    NAR/TRA L3
    My LinkedIn Profile

  11. #101
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    27th July 2014
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    south beloit, IL
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    Quote Originally Posted by jsdemar View Post
    You haven't been reading the details of my posts. That is the inhibitor/insulator on the end of the bottom grain(s) in Kosdon's long motors. Think of it as a shock absorber. In Burnsim, you need to inhibit one end of the grain.
    Gotcha- I assumed the insulator/inhibitor was some sort of separate piece- like a smaller (phenolic?) version of seal disc the on AT motors.
    NAR# 99285
    Tripoli# 16283
    L1- 4/26/2015 Madcow Cowabunga- H123SK
    L2- 11/1/2015 Wildman Darkstar 2.6- J355RL
    L3- 11/3/2017 Wildman V2 6" - M1780NT
    Woosh
    QCRS

  12. #102
    Join Date
    26th February 2012
    Location
    Poultney , Vt
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    914
    Quote Originally Posted by dhbarr View Post
    Was the i800 36in long?

    That would be a 29mm J motor .

    Eric
    You must always push your limits , because if you never fail , you will never succeed .

  13. #103
    Join Date
    18th January 2009
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    Savannnah, Ga
    Posts
    7,732
    Quote Originally Posted by MClark View Post
    Since John doesn't know either I will ask.
    What is a C-card?

    M
    "Credit" card.
    Jim Hendricksen
    L-3 Tripoli 9693
    [ICBM, Orangeburg,SC R.I.P.] - QCRS ,Princeton ILL - MDRA , Price Maryland - Woosh, Bong Wisconsin- ROCC, Charlotte NC , ICBM Camden SC
    "Made" member of Chicago & Carolina Rocket Mafia
    Rocketry...........an exact science.......but not exactly !!!

  14. #104
    Join Date
    31st May 2017
    Location
    Houston, TX
    Posts
    146
    Quote Originally Posted by blackjack2564 View Post
    "Credit" card.
    Lol that IS the most important part of buying motors nowadays!
    TRA #17256
    Tripoli Houston
    L1 - 7/8/17

  15. #105
    Join Date
    21st January 2009
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    Glendale, Arizona
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    Quote Originally Posted by blackjack2564 View Post
    "Credit" card.
    I was thinking way to hard coming up with "C" words.

  16. #106
    Join Date
    26th November 2009
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    4,952
    Quote Originally Posted by MClark View Post
    Since John doesn't know either I will ask.
    What is a C-card?

    M
    Certification. Can't buy an M load without an L-3 certification. Sure if they have a cert project waiting they can buy one M load. If one owns a venue and obtains a waiver they can fly whatever they want. They can make whatever motor they want although if they don't know what they're doing they indeed will likely blow Hardware. Kurt

  17. #107
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    31st December 2009
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    Las Cruces, NM
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    Quote Originally Posted by ksaves2 View Post
    Certification. Can't buy an M load without an L-3 certification. Sure if they have a cert project waiting they can buy one M load.
    With a business or university address, you can buy any motor using your credit card without the other C-card.

    Quote Originally Posted by ksaves2 View Post
    If one owns a venue and obtains a waiver they can fly whatever they want. They can make whatever motor they want although if they don't know what they're doing they indeed will likely blow Hardware. Kurt
    In the day when there were no mentors and only a few people making apcp, I was that guy. It is much easier now with experienced mentors, online resources, and TRA research launches. But people still blow stuff up.
    -John

    NAR/TRA L3
    My LinkedIn Profile

  18. #108
    Join Date
    26th November 2009
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    4,952
    Quote Originally Posted by jsdemar View Post
    With a business or university address, you can buy any motor using your credit card without the other C-card.



    In the day when there were no mentors and only a few people making apcp, I was that guy. It is much easier now with experienced mentors, online resources, and TRA research launches. But people still blow stuff up.
    Yup, Sure is. I was merely pointing out what is possible with an individual not to infer it was wise to attempt.
    A school or business would have to get an appropriate site to play at. Anyone can scope out sources on their own
    whether or not they know what they're doing. Kurt
    Last edited by ksaves2; 12th January 2018 at 02:29 PM.

  19. #109
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    30th January 2016
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    US > OK > NE
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    3,493
    mispost, please ignore

  20. #110
    Join Date
    9th April 2011
    Location
    Plano, TX
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    2,563
    Quote Originally Posted by 3stoogesrocketry View Post
    That would be a 29mm J motor .

    Eric
    Hubba freaking hubba. That just popped my noodle.
    Jarrett Dorough

    Most people are average

  21. #111
    Join Date
    22nd September 2017
    Posts
    642
    How many Newton Seconds in that i800 casing? Was there ever a certified load?

  22. #112
    Join Date
    26th November 2009
    Posts
    4,952
    Quote Originally Posted by blackjack2564 View Post
    "Credit" card.
    Fer cripes sake when I got my Junior Diver's card in 1968. C-card = "Certification" card so one could go rent s.c.u.b.a. tanks.
    I was 12 and my brother was 10 when we took lessons. When we were ready to go to the deep end of the pool the instructors put standard
    (for the time) 70cu ft. tanks on us and we promptly sank to the bottom of the 12 foot deep pool. We took our fins off, walked around for awhile then
    walked up the slope to the shallow end. They laughed and said, "O.K., we got some tanks for you guys." They pulled out some 50's (50cu.ft.) and we were perfectly
    neutral buoyant with them. In fact "Mike Nelson" in the 50's T.V. show "Sea Hunt" with Lloyd Bridges used "twin 50's". By ages 13 and 11 we continued on with the PADI advanced diver course took the written exam and passed. I think I got a 98% back then. I was stoked for decompression dives/repetitive dives using tables etc. but to get the advanced "C-card" we had to take 7 open water dives and that was hard to do when you can't drive. My father just barely put up with us when we disappeared under in a water filled stone quarry but worried like crazy.

    So that's where I get "C-card" from. If one "doesn't" have an L3 "C-card" (certification card) they can't buy an M load from a reputable dealer. Kurt

  23. #113
    Join Date
    21st January 2009
    Location
    Glendale, Arizona
    Posts
    1,813
    Quote Originally Posted by ksaves2 View Post
    Fer cripes sake when I got my Junior Diver's card in 1968. C-card = "Certification" card so one could go rent s.c.u.b.a. tanks.
    I was 12 and my brother was 10 when we took lessons. When we were ready to go to the deep end of the pool the instructors put standard
    (for the time) 70cu ft. tanks on us and we promptly sank to the bottom of the 12 foot deep pool. We took our fins off, walked around for awhile then
    walked up the slope to the shallow end. They laughed and said, "O.K., we got some tanks for you guys." They pulled out some 50's (50cu.ft.) and we were perfectly
    neutral buoyant with them. In fact "Mike Nelson" in the 50's T.V. show "Sea Hunt" with Lloyd Bridges used "twin 50's". By ages 13 and 11 we continued on with the PADI advanced diver course took the written exam and passed. I think I got a 98% back then. I was stoked for decompression dives/repetitive dives using tables etc. but to get the advanced "C-card" we had to take 7 open water dives and that was hard to do when you can't drive. My father just barely put up with us when we disappeared under in a water filled stone quarry but worried like crazy.

    So that's where I get "C-card" from. If one "doesn't" have an L3 "C-card" (certification card) they can't buy an M load from a reputable dealer. Kurt
    I watched Sea Hunt. I will NEVER scuba dive, someone always swims up from behind and cuts your airline.

    M


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