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  1. #61
    Join Date
    15th February 2011
    Posts
    964

    re

    second session of fin fillets completed
    2 down and 2 to go

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  2. #62
    Join Date
    15th October 2015
    Location
    Minnesota
    Posts
    1,368
    Black Brants are always cool!

    Quick question: Looks like the motor mount might be a tight fit. Have you tested the fit with a motor yet?

    NAR L1 - Optima 3" upscale/CTI H133 @ NYPower 20, May 28, 2016
    My YouTube channel

  3. #63
    Join Date
    15th February 2011
    Posts
    964
    Cabernut

    Not yet but I have used a dummy engine casing to check fit

    Bobby

  4. #64
    Join Date
    15th February 2011
    Posts
    964

    re

    Third session of fin fillets completed
    3 down and 1 to go :-)

    Need to get some launch lugs, shock chord material, screw eyes,
    and some MicroScale decal film to treat the decal sheet.

    Bobby
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  5. #65
    Join Date
    15th February 2011
    Posts
    964

    re

    well all fin fillets are done. now for launch lugs and the payload sections. screw eyes and paint
    The shock cord and parachutes will be last
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  6. #66
    Join Date
    15th February 2011
    Posts
    964

    re

    Finally got 2 coats of paint on 2 of the 4 models today .
    Kind of windy and 64 degrees but no problems with the paint .
    1 model did get 2 small runs but a bout with sandpaper and a light coat of paint and all will be well.

    The 2 payload sections and nosecones will be painted silver after a base coat of white .
    The reason for the silver is the black paint was removed from the payload and nosecone sections of these 2 vehicles.
    an example is attached below
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  7. #67
    Join Date
    26th January 2010
    Location
    Northern California
    Posts
    13,461
    Getting closer!
    NAR 91107, Level 2

    I really, really hate bugs.

  8. #68
    Join Date
    15th February 2011
    Posts
    964

    re

    white paint added now needs some sanding on 2 small runs and another coat of white paint
    launch lugs will not be added on the 2 white models until the roll pasterns have been painted

    Bobby
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  9. #69
    Join Date
    15th February 2011
    Posts
    964

    re

    Finally got my order of microscale will probably be placing decals on the solid black colored Black Brant soon,
    but I half to add some liquid decal film to the decals first.

    And I corrected the 2 runs I got in the white paint and gave the 4 payload sections another coat of white paint

    Bobby
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  10. #70
    Join Date
    26th January 2010
    Location
    Northern California
    Posts
    13,461
    Are you planning a drag race with all four?
    NAR 91107, Level 2

    I really, really hate bugs.

  11. #71
    Join Date
    15th February 2011
    Posts
    964

    re

    Nah

    I like to fly 1 at a time that way I can keep my eyes on them

    Bobby



    Quote Originally Posted by qquake2k View Post
    Are you planning a drag race with all four?

  12. #72
    Join Date
    15th February 2011
    Posts
    964
    Got to applying a layer of microsol decal film on a scrap section of decal to see if I may have any problems.
    No problems thus far. The instructions say let the film dry for 15 minutes before using decal.
    I am gonna wait till the next morning. Tomorrow after lunch I will be applying the deacal to a scrap section of black airframe .


    If you zoom in on the decal you can see it's detail.. The mixing cups were from the dollar tree sold a disposable "shot" glasses
    the brush came from Hobby Lobby , Masters Touch pony hair small mop-oval series 425 size 1/2 item number 100289 $5 on sale for 50% off
    I used the 40% off coupon for a pack of Estes D12-5 motors :-)

    Bobby
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  13. #73
    Join Date
    15th October 2015
    Location
    Minnesota
    Posts
    1,368
    That's what I use for epoxy mixing cups. Dollar store packs of plastic shot glasses. They work great for many things and they're cheap.
    NAR L1 - Optima 3" upscale/CTI H133 @ NYPower 20, May 28, 2016
    My YouTube channel

  14. #74
    Join Date
    10th July 2007
    Location
    Melbourne, Australia
    Posts
    1,468
    That's what I use for epoxy mixing cups. Dollar store packs of plastic shot glasses. They work great for many things and they're cheap.

    +1. For a little bigger mix, the takeout food containers from the same shops are great. You can even mix in the lids for small quantities.
    TRA 13430, Level 3

    "Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)

  15. #75
    Join Date
    15th February 2011
    Posts
    964

    re

    Well I could not wait so I started a tad early :-)
    the scrap decal I used was just like the original one I was gonna use but the scrap decal bottom section was a tad to tall or side to side in the photo.
    With no BT55 airframe on hand to use I settled for a left over section of 4 inch diameter tube that was painted black

    the decal is supposed to be a complete wrap around for an Estes BT55 tube

    All I can say is not bad not bad !!
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  16. #76
    Join Date
    19th February 2017
    Location
    The world, probably
    Posts
    664
    Any plans of trying some small composites in these? Seems like they would really move on an F21, and they're plenty strong to handle it...
    NAR #104043, Jr L1 - 3/18/18
    www.crmrc.org

    Director of Impressive Titles, ArdIU Flight Computer Project:
    lithosphererocketry at gmail dot com

  17. #77
    Join Date
    15th February 2011
    Posts
    964
    One of my earlier models has an "E" engine mount where I may use a "E" or "D" motor.
    Gonna try "D" first then later an "E"

  18. #78
    Join Date
    19th February 2017
    Location
    The world, probably
    Posts
    664
    Quote Originally Posted by bobby_hamill View Post
    One of my earlier models has an "E" engine mount where I may use a "E" or "D" motor.
    Gonna try "D" first then later an "E"
    Composite E and baby F motors are D sized... High end F motors are E sized... Just sayin'.

    Now that I look, apparently AeroTech no longer makes the F21. However, you can still get the black smoky version of the motor, the F30:
    http://www.thrustcurve.org/motorsearch.jsp?id=944
    NAR #104043, Jr L1 - 3/18/18
    www.crmrc.org

    Director of Impressive Titles, ArdIU Flight Computer Project:
    lithosphererocketry at gmail dot com

  19. #79
    Join Date
    15th February 2011
    Posts
    964
    I will be sticking with "D" sized "E" and baby "F" for now
    If I use a high end "E" or "F" it will be later on with a bigger diameter airframe as the airframe I am
    using now is just an Estes BT-55

  20. #80
    Join Date
    15th February 2011
    Posts
    964

    re

    what I have simed so far is

    D12-5 = 977 feet

    E30-7 =1,640 feet


    Small diameter chute or maybe a streamer

  21. #81
    Join Date
    15th February 2011
    Posts
    964

    re

    finally got a chance to get some decal work done on the airframe
    the payload section decal is next
    then some clear coat
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  22. #82
    Join Date
    15th February 2011
    Posts
    964
    Build on hold till January 1 2018

    Merry Christmas
    Happy New Year

    Y' All

  23. #83
    Join Date
    15th February 2011
    Posts
    964

    re

    OK

    Sorry for the long delay.

    The weatherman here in North Carolina is calling for 64 degrees Sunday and 60 degrees on Monday
    Sooooo I need to get the 2 Black Brants I have that are painted white masked off to give it it's black roll pattern and
    checkerboard pattern on the fins . This way I can spray them outside. ( don't have a spray booth yet )

    That will give me something to do while the 4 inches of snow falls that is supposed to hit Wednesday PM

    Will keep everyone posted on my progress

    Bobby
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  24. #84
    Join Date
    15th February 2011
    Posts
    964

    re

    I finally got one of the airframes lined up and almost ready for masking
    I used open rocket to print out a fin alignment guide for 8 fins on a BT-55 airframe.
    With the airframe being 16 inches long each one of the roll patterns are 4.75 inches long.
    The roll pattern ends just forward of the center line of the fins. If you look at one of the
    attached photos you can see that you take the forward section of the fin and divide it by 4.

    The end of the roll pattern ends 1/4 of these section before you get to the center of the fin

    Bobby
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  25. #85
    Join Date
    15th February 2011
    Posts
    964

    motor fitment

    No problems experienced
    I didn't expect any motor wise

    Bobby




    Quote Originally Posted by Cabernut View Post
    Black Brants are always cool!

    Quick question: Looks like the motor mount might be a tight fit. Have you tested the fit with a motor yet?
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  26. #86
    Join Date
    15th February 2011
    Posts
    964

    re

    marking and measuring fin roll patterns

    cutting the masking tape Correctly to mask the fin roll patterns

    But the fin checker board roll patterns look sweet when done correctly
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  27. #87
    Join Date
    26th January 2010
    Location
    Northern California
    Posts
    13,461
    That's some great tape work there.
    NAR 91107, Level 2

    I really, really hate bugs.

  28. #88
    Join Date
    15th February 2011
    Posts
    964

    re

    Thanks for the complement
    attached is a better view

    Bobby


    Quote Originally Posted by qquake2k View Post
    That's some great tape work there.
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  29. #89
    Join Date
    26th January 2010
    Location
    Northern California
    Posts
    13,461
    That's going to look great when it's done!
    NAR 91107, Level 2

    I really, really hate bugs.

  30. #90
    Join Date
    15th February 2011
    Posts
    964

    re

    After 4+ hours all 4 fins are finally masked on the first white rocket. "whew"

    Gonna take a cat nap and get up at 230 and watch Outlaw Star on Toonami cable channel then
    finish the roll pattern on the airframe

    Bobby

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