Loc black brandt X

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Scott Nokes

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Hi everyone thank you for all the help given to me recently.
I have about 1 inch space between the base of them tube and the motor centering ring.
I've been brain storming, is that too small amount to build a terrier booster for it. I looked at pictures of the real thing and saw the booster and I thought that would need an awesome addition thank you
 

heada

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It could be possible but I usually use 1 body tube width as a minimum length for a coupler for staging (4" minimum on this 4" diameter rocket). You might be able to build a custom inter-stage coupler that is strong enough in that 1 inch but I wouldn't. This is one of those modifications that needs to be planned for before any building starts.

On the 2.2" version of this kit, LOC has 2 options, a 38mm with the aft ring installed higher and custom fins to support a inter-stage coupler and then the 3" terrier booster and also a 29mm option with the standard aft ring placement and fins that wont support the inter-stage coupler and terrier booster.
 

thzero

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This isn't a LOC build, its based on BT-60 fiberglass tubes from Mach1 Rocketry that is planned to be dual stage - it uses approx the tube width as the min. length for the coupler as heada mentioned.

 

Scott Nokes

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I have another question guys. The wood the fins are made from is really nice but I'm not wanting any wood grain showing. I know in small models,I used to apply sanding sealer. What are alternative methods on big boys like the 4 in loc BBX
thank you
 

thzero

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Bondo or other filler... Variety of opinions here. Sanding. :).

You can also paper the fins, there are variety of techniques there.

Or fiberglas them.
 

teepot

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I like Elmer's color changing wood filler. It's easy to sand smooth.
 

heada

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Sand with 180, prime, sand with 180 again, prime again and then sand with 220. Then when painted with color (black for BBX) no grain will show.
 

heada

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Duplicolor is ideal. It coats very well, dries to the touch in just a few minutes and fully in less than an hour and sands well. Its also hard to find and more expensive. I've used Krylon ColorMax grey as a distant second. It doesn't coat as well, takes longer to dry and doesn't sand as well...but its available nearly everywhere and is much cheaper.

edit: Krylon ColorMax white primer is worse than worthless. Its the consistancy of water, runs horribly and takes 4 coats to equal 1 good coat of just about anything else.


 

Bruiser

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Duplicolor or Rustoleum filler and primer. It's found in the automotive area of Walmart

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-Bob
 
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