Monday, September 2, 2019

New Estes Black Brant II, Changes Part 2, Antennas

In the previous version of the kit, you surface or end glue toothpicks to the outside of the upper body tube. It's recommended that this antenna assembly be used for display, you were given another length of BT-55 without antennas for flight.
These 1" long toothpick antennas could break off very easily.

Be careful if you drill the antenna holes with an X-Acto knife tip. The diameter of the hole can easily end up too large. Spin drill a little, check the fit then repeat. You want the tube hole to fit fairly tight around the antennas.

In the new kit you are provided with plastic tapered toothpicks. In the instructions, the end is cut off leaving a 2" length. The second picture shows the ends being glued to the tapered base shoulder of the nose cone.
(Don't the antennas cut to length yet - Read the next paragraph)

GOTCHA: The 2" long plastic toothpick antennas don’t touch the bottom of the nose cone shoulder as shown in the instruction drawing. The nose cone shoulder doesn’t go down far enough to contact the toothpick base ends. 

Left Picture: With the toothpicks extending 1" outside of the body tube section (using the 1" measurement from the previous BBII kit instructions) the toothpicks cross and hit each other inside the tube. With the ends inside ends crossed up it effects the angle of all three antennas.
Right Picture: If the toothpicks are cut to 1 11/16" the ends will touch and give you a triangle center gluing point. Place a drop of plastic cement where the three ends meet. When glued at the center you should end up with the proper downward angle and exposed length outside the body tube.





Here's the finished antenna/body tube segment. 
At the 1 11/16" length, the toothpicks will extend 1" outside the tube.

3 comments:

  1. How strong are the plastic toothpicks, Chris? That seems like a place where they could break pretty easily.

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    Replies
    1. Hi Metal,
      They are just as strong as the old wooden toothpick antennas, more flexible, too.
      These are like any other small detail you'd find on a scale model. There's a chance they could break off.
      This new thru the wall attachment is much better than the old end glued toothpicks.

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    2. I like the way Rocketarium did the antennae on the Jayhawk I just finished. They call for sections of paper clips as antennae. That would work ok, maybe better than wood or plastic, but they would still bend. I used music wire instead, like is used for RC plane control rods and landing gear. It's a little flexible, but it's not bending anywhere.

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