.ork File For Estes 2486 Flying Colours?

Discussion in 'Plans' started by Co-leader of the LRP, Nov 5, 2019.

Help Support The Rocketry Forum by donating:

  1. Nov 5, 2019 #1

    Co-leader of the LRP

    Co-leader of the LRP

    Co-leader of the LRP

    Active Member

    Joined:
    Oct 23, 2019
    Messages:
    35
    Likes Received:
    1
    Gender:
    Male
    Location:
    Rain City
    Does anybody have a .ork file for the Estes 2486 Flying Colours rocket? I am designing a scratchbuilt rocket about the same size as it, and something seems very off with the weight as it is much less than the weight listed in the catalog for the Flying Colours. I thought that a .ork file for this rocket would help me fix the issue.
     
  2. Nov 5, 2019 #2

    K'Tesh

    K'Tesh

    K'Tesh

    OpenRocket Chuck Norris

    Joined:
    Mar 27, 2013
    Messages:
    12,814
    Likes Received:
    431
    I don't have any info on the fin can for that kit... I'm not going to be able to help.
     
  3. Nov 5, 2019 #3

    Co-leader of the LRP

    Co-leader of the LRP

    Co-leader of the LRP

    Active Member

    Joined:
    Oct 23, 2019
    Messages:
    35
    Likes Received:
    1
    Gender:
    Male
    Location:
    Rain City
    That's ok, as long as somebody has it.
     
  4. Nov 6, 2019 #4

    neil_w

    neil_w

    neil_w

    When in doubt, add more rocket TRF Supporter

    Joined:
    Jul 14, 2015
    Messages:
    6,495
    Likes Received:
    918
    Location:
    Northern NJ
    The Estes Flying Colors has a plastic nose cone and plastic fin can, which add to its weight. What did you make yours out of, and what does it weigh?
     
  5. Nov 6, 2019 #5

    dhbarr

    dhbarr

    dhbarr

    Amateur Professional TRF Supporter

    Joined:
    Jan 30, 2016
    Messages:
    5,637
    Likes Received:
    570
    I don't have a sim, but 100g is about right. IMG_20191105_204154.jpg
     
  6. Nov 6, 2019 #6

    neil_w

    neil_w

    neil_w

    When in doubt, add more rocket TRF Supporter

    Joined:
    Jul 14, 2015
    Messages:
    6,495
    Likes Received:
    918
    Location:
    Northern NJ
    Hey I have that same scale. We're practically related!
     
    dhbarr likes this.
  7. Nov 6, 2019 #7

    Co-leader of the LRP

    Co-leader of the LRP

    Co-leader of the LRP

    Active Member

    Joined:
    Oct 23, 2019
    Messages:
    35
    Likes Received:
    1
    Gender:
    Male
    Location:
    Rain City
    Plastic nose cone, balsa fins. It says it weighs 47 grams, while the Flying Colours, of the same diameter but one inch longer, weighs 85. I don't think a plastic fin can would make 38 grams of a difference.



    Or would it? Hmmmmm... :confused:
     
  8. Nov 6, 2019 #8

    Co-leader of the LRP

    Co-leader of the LRP

    Co-leader of the LRP

    Active Member

    Joined:
    Oct 23, 2019
    Messages:
    35
    Likes Received:
    1
    Gender:
    Male
    Location:
    Rain City
    IMG_2120.jpg
    Strange, the catalog says it weighs 85 g
     
  9. Nov 6, 2019 #9

    dhbarr

    dhbarr

    dhbarr

    Amateur Professional TRF Supporter

    Joined:
    Jan 30, 2016
    Messages:
    5,637
    Likes Received:
    570
    Well I'm pretty sure the FC has clay in the nose to allow for the 24mm add-on booster.
     
  10. Nov 6, 2019 #10

    Co-leader of the LRP

    Co-leader of the LRP

    Co-leader of the LRP

    Active Member

    Joined:
    Oct 23, 2019
    Messages:
    35
    Likes Received:
    1
    Gender:
    Male
    Location:
    Rain City
    Maaaaaaaaybe, but I would still like a file to experiment with and compare.
     
  11. Nov 7, 2019 at 10:09 AM #11

    caveduck

    caveduck

    caveduck

    semi old rocketeer

    Joined:
    Jun 6, 2011
    Messages:
    1,202
    Likes Received:
    58
    If you built your scratch model from balsa, it is going to weight a lot less; plastic fin units are usually quite heavy by comparison.

    The Estes catalog weight and dimension data from that era are riddled with errors. I would rely on actual measurements for the Flying Colors. Source: have investigated a lot of discrepancies for my OpenRocket parts database, but unfortunately not this one.
     
  12. Nov 7, 2019 at 1:50 PM #12

    neil_w

    neil_w

    neil_w

    When in doubt, add more rocket TRF Supporter

    Joined:
    Jul 14, 2015
    Messages:
    6,495
    Likes Received:
    918
    Location:
    Northern NJ
    Exactly what nose cone are you using? If I judge correctly, the Flying Colors uses the same (or approximately the same) nose cone that the ESAM uses (among many others). It's nearly 8" long, and weighs, according to K'Tesh's ESAM ORK file, almost 37g all by itself.

    So your total of 47 grams suggests that you're probably using a much lighter nose cone. What does yours weigh?

    Also, there is no reason you can't make an OR file of your own rocket, and just see if it all makes sense. The Flying Colors, like most of Estes RTF models, uses an assortment of construction techniques in the fin can/motor mount that are very different from what you would do on your own. So you wouldn't necessarily expect your scratch build to match the weight of the kit.

    Does your rocket have shock cord and parachute installed yet? Those add some weight, particularly the shock cord.

    In addition to the fins, the whole fin can is plastic (as mentioned by caveduck above). That's still more weight.

    So, my conclusion is that there's mostly likely nothing strange here. RTF construction is heavier than what you would normally do on your own, plus that nose cone is a big contributor.
     
  13. Nov 7, 2019 at 3:19 PM #13

    Co-leader of the LRP

    Co-leader of the LRP

    Co-leader of the LRP

    Active Member

    Joined:
    Oct 23, 2019
    Messages:
    35
    Likes Received:
    1
    Gender:
    Male
    Location:
    Rain City
    My nose cone is 6.75 inches long including the shoulder, and weighs 21 grams. I also hadnt added the parachute. I did that and it makes much more sense. Thank you for your help, everybody.
     
  14. Nov 7, 2019 at 3:21 PM #14

    Co-leader of the LRP

    Co-leader of the LRP

    Co-leader of the LRP

    Active Member

    Joined:
    Oct 23, 2019
    Messages:
    35
    Likes Received:
    1
    Gender:
    Male
    Location:
    Rain City
    What do you mean from that era? That's the 2019 catalog.
     
  15. Nov 7, 2019 at 3:21 PM #15

    neil_w

    neil_w

    neil_w

    When in doubt, add more rocket TRF Supporter

    Joined:
    Jul 14, 2015
    Messages:
    6,495
    Likes Received:
    918
    Location:
    Northern NJ
    Yeah, so 16 grams saved on nose cone, many more grams saved on fin can, minus parachute (which weighs very little) and shock cord (which weighs more) and it sounds like you're in the right ballpark.
     
  16. Nov 7, 2019 at 3:36 PM #16

    Nytrunner

    Nytrunner

    Nytrunner

    Master of Rivets

    Joined:
    Oct 15, 2016
    Messages:
    5,145
    Likes Received:
    1,075
    Gender:
    Male
    Location:
    Huntsville AL
    Hey me too! (
    I was going to use it to measure out ejection charges for this weekend, but I'm unsure I'll even be able to take that rocket if I have to transport launch equipment instead...)
     
  17. Nov 8, 2019 at 8:12 PM #17

    caveduck

    caveduck

    caveduck

    semi old rocketeer

    Joined:
    Jun 6, 2011
    Messages:
    1,202
    Likes Received:
    58
    heh that looked like the layout of some older catalogs...on the face of it it's a reasonable weight for a fin-can model of that size, but I'd still take the catalog kit data with a grain of salt. I confess to not having looked very hard at the last couple of catalogs since there's little useful parts info anymore.
     

Share This Page