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  1. #1
    Join Date
    31st December 2013
    Posts
    302

    Quick 1340 mock-up flyer

    I also put together a quick Enerjet 1340 mock-up last night - which is to say an overbuilt BT-56 Eliminator with a payload section and 29mm motor tube. I'm still getting the hang of working with the NCR tube cutter.

    I made the motor tube flush, though later noticed the 1340 diagram has it extending out a bit. It will be friction fit, as per tradition. I also have not done anything to simulate the plastic coupler, but I may. And the purple payload section needs a decal or two, or something. Would probably look better with the yellow nose cone, though I am trying to conserve them, so will fly it with the black.

    Planning to fly it later this month, with the Estes altimeter inside. And thinking about maybe getting a Jolly Logic too.

    Click image for larger version. 

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    Last edited by Tramper Al; 11th January 2017 at 04:19 AM.

  2. #2
    Join Date
    19th February 2009
    Location
    Auburn, WA USA
    Posts
    1,829
    If you fly the Estes altimeter, be sure to have generous static ports in the payload section. The Estes unit seems to need a faster decrease in pressure to detect a launch than many other altimeters. If you get a reading, it will likely be pretty good. But I've had more than a few flights that came back with the altimeter still reading zero.

    The Jolly Logic units (all three of them) are far less fussy.

    I did a 1340 from an Eliminator as well. Neat model. So far it's only flown on 24mm motors (via the Estes adapter). I need to go over to the the other side of the state to fly it on a 29mm E or F. Maybe this year.

    Bernard Cawley
    NAR 89040 L1
    AMA 42160
    KG7AIE

  3. #3
    Join Date
    31st December 2013
    Posts
    302
    Quote Originally Posted by BEC View Post
    If you fly the Estes altimeter, be sure to have generous static ports in the payload section.
    Thank you for that tip, I have not used it before. I will put some pretty good holes in the payload section, and that will change the look too!

    Our big field is a couple of hours away too, in the next state. And highly seasonal, it being a lake!

  4. #4
    Join Date
    15th October 2016
    Location
    Huntsville AL
    Posts
    824
    For what its worth, I've tripped the altimeter with 3 just three holes about the size of a pencil lead (evenly spaced).

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