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  1. #31
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    20th June 2015
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    +1 on the payloadbay.com
    Print it out and glue it to a piece of $2.99 foam board from Wal-Mart.

    Jim V

    Champlain Region Model Rocket Club
    CRMRC
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    NAR #101467
    L1 - 5/21/16 Estes Mega Der Red Max H128W to 1,021'


  2. #32
    Join Date
    27th December 2014
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    Seattle, WA
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    Quote Originally Posted by Incongruent View Post
    How do you know it's going to fly minimum diameter and high velocity? Haven't you heard the terms: "You can always adapt down" and "confetti doesn't fly fast"? (Okay, I made the second one up.)

    And rockets, I have picked up a lot of shoddy advice over the years... well, months. Anyways, you can ask me so you have a scapegoat when things fail. Just no lawsuits please!
    Well, he said it was minimum diameter 29mm and flying an H, so that kinda adds up to attempting to fly fast. If I may say so, I've seen a lot more good and supportive advice on this forum than the other kind. If anything, they trend toward the codependent.

    To the OP, a 38mm rocket with a 29mm motor mount will let you practice many of these skills in a slightly less difficult way. It looks like you need some work on building skills before trying to break Mach.

    NAR L1 "Cheeto Dust", scratch 54mm, H54R (before it became a G54), Mansfield, WA
    L2 "Arc Light", Madcow 2.6" Arcas, J285CL, Mansfield, WA, recovery by snowshoe

  3. #33
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    25th October 2016
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    Quote Originally Posted by boatgeek View Post
    Well, he said it was minimum diameter 29mm and flying an H, so that kinda adds up to attempting to fly fast. If I may say so, I've seen a lot more good and supportive advice on this forum than the other kind. If anything, they trend toward the codependent.
    My point is that since they fly with a club, if it flys at all with the current fins it'll be with a smaller motor.

  4. #34
    Join Date
    5th August 2015
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    Quote Originally Posted by rockets View Post
    Oh, boy I think I'm going to need some HELP!
    Attachment 316305Attachment 316306
    The first two fins were good, but the last fin didn't go over too well. I redid the simulation on RockSim with the canted fin. It still was stable. But, I want a second opinion. What are your guys ideas??
    Thanks,
    Snap it off. Then get a fin guide from the internet (payloadbay.com) and use it to make proper fins. EDIT; nvm, just saw your other post.
    trffan has been retired

  5. #35
    Join Date
    5th August 2015
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    Ok, honestly, i think you are going to have to start over on this build. Buy a new tube and instead of plywood, get a 1/16" fiberglass sheet. They arent expensive and will hold up better to the mach+ speeds. As for fin alignment, i too would suggest the foam board method, it works pretty well and as long as you cut it properly you cant really go wrong with it.

    Also, i noticed in your original post that you didnt have a tracker in your rocket. If that thing is going over 8K ft you're going to need one.

    Also, if you are looking to get the highest altitude possible with your motor, i would suggest stuffing the recovery systems in the nose cone and shortening the body tube as much as possible. Also, that nose cone is not what you want for getting high altitude. This one is better. http://www.rocketryforum.com/showthr...44#post1510344
    trffan has been retired

  6. #36
    Join Date
    26th October 2014
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    North of Seattle
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    570
    29mm MD + H195 + cardboard rocket = a need for tracking. If it stays together, it is going to disappear except in the bluest sky conditions.

    Give some thought to your launch space. Can you recover this thing? An H-195 is a AT reloadable case, no? What would a 3 mile drift do to your odds of finding the thing?

    I have a 29mm MD carbon fiber rocket (heavier than cardboard and wood fins but stronger) that gets way up there (2000'?) on Estes F motors. If I used 4 times the motor (H) I would expect to never see it again without some kind of tracking device. Smart Launch app says 9974'. You might get to see all the powder plus various other parts released at a much lower altitude when the 60+ Gs tests some joint to failure.
    Kyndel
    Bradford’s Law – restated for dummies: There are exponentially diminishing returns on doubling down on stupid.

  7. #37
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    18th November 2014
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    Quote Originally Posted by Igotnothing View Post
    29mm MD + H195 + cardboard rocket = a need for tracking. If it stays together, it is going to disappear except in the bluest sky conditions.

    Give some thought to your launch space. Can you recover this thing? An H-195 is a AT reloadable case, no? What would a 3 mile drift do to your odds of finding the thing?

    I have a 29mm MD carbon fiber rocket (heavier than cardboard and wood fins but stronger) that gets way up there (2000'?) on Estes F motors. If I used 4 times the motor (H) I would expect to never see it again without some kind of tracking device. Smart Launch app says 9974'. You might get to see all the powder plus various other parts released at a much lower altitude when the 60+ Gs tests some joint to failure.
    I have "6 tracking devices" I have my older brother, he can see a tiny rocket thousands of feet high. Second, I have a parachute that will shine from the sun, (it's silver & sparkly) Third, you will probably hear the ejection charge, you can track it that way. Fourth, the altimeter will beep, I tested it, it is ear piercing loud! Fifth, you should be able to see it in the corn because it will be red & blue. Sixth, I usually put glitter in my MD rockets, or rockets that will go high.
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  8. #38
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    18th November 2014
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    Everyone, I fixed the fin problem!
    I ripped off the fin, and glued it back on, in a different area. It isn't perfect, but it is a LOT better. I'll post pics later. Today or tomorrow I will paint it. Then I might take a video of myself holding it and explaining how it should work.
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  9. #39
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    18th November 2014
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    Click image for larger version. 

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    Looking better.
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  10. #40
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    5th August 2015
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    1,206
    Looks fine.
    trffan has been retired

  11. #41
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    13th October 2014
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    SouthEastern, WA
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    Quote Originally Posted by rockets View Post
    Click image for larger version. 

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    Looking better.
    Thanks,
    Fins look good on alignment at first glance, of larger concern to me is the mach limit of cardboard...
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  12. #42
    Join Date
    22nd July 2011
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    Where ever the the boss sends me...
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    2,807
    We learn to walk by falling down. At the age of 13/14/15 we are/were all invincible & bullet proof.

    Rockets: better use that super power to solve world hunger while you still know everything. As you get older it goes away.....

    You will NOT see a rocket that small over 1k feet, smoke trail yes, rocket no, but then I wear glasses. You will NOT hear the ejection above about 700feet, but then I have tinnitus.
    I would suggest a few trial flights on a smaller motor, like a D or E, and see how it goes. But then I have lost my mind over time, so what do I know........

    There is a lot of experience on this forum and if you take the time to take it in, you might learn a thing or 2. Fall down if you must, but it hurts a lot less if you use what is between your ears.
    Terry

    NAR L1
    L2 is on hold, maybe never

  13. #43
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    27th December 2014
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    Quote Originally Posted by rockets View Post
    I have "6 tracking devices" I have my older brother, he can see a tiny rocket thousands of feet high. Second, I have a parachute that will shine from the sun, (it's silver & sparkly) Third, you will probably hear the ejection charge, you can track it that way. Fourth, the altimeter will beep, I tested it, it is ear piercing loud! Fifth, you should be able to see it in the corn because it will be red & blue. Sixth, I usually put glitter in my MD rockets, or rockets that will go high.
    A quick reality check:
    I launched a 38mm machbuster to about 4000-5000 feet with a few dozen people watching. The only person who saw it eject had binoculars. He was able to track the chute, but nobody else saw it. It landed in pretty much bare dirt and some low grass. It was over a hill from the launch area, so we lost visual before it hit the ground. I searched for an hour with a good bearing and didn't find it. Someone else looking for another rocket brought it in, from about half a mile from the launch site. The chute had shredded (long story) so it fell pretty fast. On another occasion, I was able to track an altimeter that had ejected from a rocket on a mowed grass field. I could hear it from about 30' away, out in the grass with no rocket to muffle it.

    You're sending a smaller rocket to 8-10 thousand feet. You won't see it at apogee. You MIGHT see the chute, but I think it's unlikely unless it's a super-calm day. You won't hear the ejection charge, other than a muffled thump that won't help you locate it. You won't see the rocket in anything more than knee-high grass, and even that might be a stretch. If it's in corn, you'll never find it unless you can get within 50 or so feet. Your rocket will land a mile or more away, so you won't be able to get a good bearing to get you that close.

    I've launched a rocket that I didn't expect to find again, but I did that on a single-use motor. If you fly this, you'll be buying a new casing. Seriously, do your savings a favor and fly it on a D and then an F single use. If you think you can still find it on an H, go for it. I would be surprised if you can find it on the F.
    NAR L1 "Cheeto Dust", scratch 54mm, H54R (before it became a G54), Mansfield, WA
    L2 "Arc Light", Madcow 2.6" Arcas, J285CL, Mansfield, WA, recovery by snowshoe

  14. #44
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    18th November 2014
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    Quote Originally Posted by boatgeek View Post
    A quick reality check:
    I launched a 38mm machbuster to about 4000-5000 feet with a few dozen people watching. The only person who saw it eject had binoculars. He was able to track the chute, but nobody else saw it. It landed in pretty much bare dirt and some low grass. It was over a hill from the launch area, so we lost visual before it hit the ground. I searched for an hour with a good bearing and didn't find it. Someone else looking for another rocket brought it in, from about half a mile from the launch site. The chute had shredded (long story) so it fell pretty fast. On another occasion, I was able to track an altimeter that had ejected from a rocket on a mowed grass field. I could hear it from about 30' away, out in the grass with no rocket to muffle it.

    You're sending a smaller rocket to 8-10 thousand feet. You won't see it at apogee. You MIGHT see the chute, but I think it's unlikely unless it's a super-calm day. You won't hear the ejection charge, other than a muffled thump that won't help you locate it. You won't see the rocket in anything more than knee-high grass, and even that might be a stretch. If it's in corn, you'll never find it unless you can get within 50 or so feet. Your rocket will land a mile or more away, so you won't be able to get a good bearing to get you that close.

    I've launched a rocket that I didn't expect to find again, but I did that on a single-use motor. If you fly this, you'll be buying a new casing. Seriously, do your savings a favor and fly it on a D and then an F single use. If you think you can still find it on an H, go for it. I would be surprised if you can find it on the F.
    OK, thanks for the tips!
    Oh, bye the way I'm flying a DMS motor, so no casing.
    If I lose it, so what. There is nothing really expensive other than the $30 altimeter. I've lost a altimeter in a rocket similar to this. I got the rocket back, but the nose cone separated. Unless I can find a tracker that is really small & cheap, it will have to go "tracker less."
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  15. #45
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    18th November 2014
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    RECORDBREAKERII 001
    This a video of me explaining everything. Sorry if the audio isn't bad. I had a lot of ugh, and umms in there. Sorry.
    RECORDBREAKERII 003
    This video is a up-close of my MD rocket. :-)
    RECORDBREAKERII 004
    And there is my launch pad, from PVC. Each piece is 3 ft. long.
    Is there a good finish for this rocket? Something that will make it shine & smooth??
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  16. #46
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    Quote Originally Posted by rockets View Post
    RECORDBREAKERII 001
    This a video of me explaining everything. Sorry if the audio isn't bad. I had a lot of ugh, and umms in there. Sorry.
    RECORDBREAKERII 003
    This video is a up-close of my MD rocket. :-)
    RECORDBREAKERII 004
    And there is my launch pad, from PVC. Each piece is 3 ft. long.
    Is there a good finish for this rocket? Something that will make it shine & smooth??
    Thanks,
    Hmm, the video URL's aren't working. I guess I will have to stick to pictures for now.
    Click image for larger version. 

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    some nice lookin' rocket! I really like it! the launch pad is pretty sweet! BTW, that white part is supposed to be there. It's kinda supposed to be Red, White, & Blue. It's supposed to represent the USA!
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  17. #47
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    25th October 2016
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    For finishing, what did you paint it with? That determines which finishing techniques to use.

  18. #48
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    1st July 2011
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    Pittsburgh, PA
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    I never did a mach breaker or used a launch tower. Maybe some of the other that have will give their thoughts. I think the space between the PVC for the fins is too much. With that as the only guidance, it looks like there is too much slop for the rocket to move around.

    I remember back in the late 80s my bother and I flew an Estes rocket with a G42. It was not min diameter, but the rocket was unstable and not very strong. It shredded, it made a fairly tight circle for a rocket, and smashed into the windshield of my brother's station wagon. Windshield was cracked pretty bad and there were burn marks on the center part where it hit (motor was still burning). Nobody was hurt at least.

    Do your best to get a good, solid rocket for min diameter with a large motor. Practice safe distances from houses, people, etc. Have a decent controller allowing some distance between you and the rocket just in case. The rocket may be expendable, but you are not!
    Kevin Wuchevich
    Tripoli Pittsburgh
    TRA 12238

  19. #49
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    29th July 2012
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    Northern Michigan
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    Quote Originally Posted by rockets View Post
    OK, thanks for the tips!
    Oh, bye the way I'm flying a DMS motor, so no casing.
    If I lose it, so what. There is nothing really expensive other than the $30 altimeter. I've lost a altimeter in a rocket similar to this. I got the rocket back, but the nose cone separated. Unless I can find a tracker that is really small & cheap, it will have to go "tracker less."
    Thanks,
    inexpensive tracker if you have a ham license there is a $20.00 2 meter RF kit that can be found

    http://www.jbgizmo.com/page30-i.htm
    Last edited by michigander; 4th April 2017 at 01:52 AM. Reason: added link
    L2

    2018 Plan on burning lvl 3 NS :)

  20. #50
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    13th June 2014
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    Quote Originally Posted by michigander View Post
    inexpensive tracker if you have a ham license there is a $20.00 2 meter RF kit that can be found
    Got a link to that deal?
    Tim
    L3 NAR 98225

  21. #51
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    29th July 2012
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    Northern Michigan
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    Quote Originally Posted by timbucktoo View Post
    Got a link to that deal?

    trip to the garage to find , mine is inbuilt yet , I bought 1 last summer some time quick shipping btw

    http://www.jbgizmo.com/page30-i.htm
    L2

    2018 Plan on burning lvl 3 NS :)

  22. #52
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    Just my $0.02 USD: since you seem dead set on this course of action, at least think about doing your maiden flight on a 29mm BP. An E16 ought to fit the bill.

  23. #53
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    Quote Originally Posted by dhbarr View Post
    Just my $0.02 USD: since you seem dead set on this course of action, at least think about doing your maiden flight on a 29mm BP. An E16 ought to fit the bill.
    Hmm, I might, I'm considering. I'm kinda on a budget so I'm not sure.
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  24. #54
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    Quote Originally Posted by timbucktoo View Post
    Got a link to that deal?
    That maybe a good idea with some test flights I want to do 2 stage 29mm BP but it Sims to 6500 and less than mach 1
    Recertification coming soon
    Member of Indiana rocketry joining again

    Tripoli 14704 L2
    L1 mwp 11 XS on a H 250
    L2 mega Hi flyer on J285
    Staring my L3 build a 10" sono tube fin 10.50' tall



    I scratch build .

  25. #55
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    27th December 2014
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    Quote Originally Posted by rockets View Post
    Hmm, I might, I'm considering. I'm kinda on a budget so I'm not sure.
    Thanks,
    You can get a package of E or F motors for less than the cost of the altimeter you're willing to lose with this flight. If you're on a budget, save the money on replacing the altimeter.
    NAR L1 "Cheeto Dust", scratch 54mm, H54R (before it became a G54), Mansfield, WA
    L2 "Arc Light", Madcow 2.6" Arcas, J285CL, Mansfield, WA, recovery by snowshoe

  26. #56
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    So when are you going to fly this? Be sure to post pics & videos.
    Tim
    L3 NAR 98225

  27. #57
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    18th November 2014
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    Quote Originally Posted by timbucktoo View Post
    So when are you going to fly this? Be sure to post pics & videos.
    Hopefully this month. Yes, I will bring my video camera!
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  28. #58
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    25th February 2014
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    Quote Originally Posted by boatgeek View Post
    You can get a package of E or F motors for less than the cost of the altimeter you're willing to lose with this flight. If you're on a budget, save the money on replacing the altimeter.

    this is a very good suggestion. I have a couple 29mmd rockets- some apogee aspire clones- one for speed and one for altitude- and plan on a couple flights with lower altitudes and speed. basically workin my way up to the speed and altitude.
    im not sure,andrew, what your budget is, but theres some 24 mm and 29 mm lower thrust F and G motors from aerotech. the estes f motors are pretty wicked,too. not sure if the cato thing was fixed with the E9 engines.
    also, apogee has an f10. cool long burn motor.
    I think I saw something about a mylar chute, which is a good idea, but at the high altitude I think your going to get from that H motor, I don't think it would be able to be seen. have you thought about a mylar streamer? apogee has a good video on making monster mylar streamers. I made mine 24" wide and about 4' long and they pack easily into my mmd rockets. and the mylar came from a survival blanket I bought for about $3 on amazon and I have a lot left over for more streamers.

  29. #59
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    Quote Originally Posted by dhbarr View Post
    Just my $0.02 USD: since you seem dead set on this course of action, at least think about doing your maiden flight on a 29mm BP. An E16 ought to fit the bill.
    Don't the E16s CATO alot?
    trffan has been retired

  30. #60
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    Quote Originally Posted by TRFfan View Post
    Don't the E16s CATO alot?
    Think you are referring to the E9!

    Tim
    L3 NAR 98225

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