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May 04, 2021, 03:35 PM
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Build Log

VOK 2021 - Baby Bombshell


This looks like fun, so I'm going to jump in! I'm really enjoying what Willy Nillies is doing with the sub-250g RC designs, but I really like pre-WWII designs, so I'm having a go at a shrunk down 1940 Baby Bombshell (which was itself a 1/2 size Buzzard Bombshell) using one of the WN power packs. I've already built one flyable but less than perfect prototype, so the new one should be much better.
Last edited by NX13688; May 16, 2021 at 10:09 PM.
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May 04, 2021, 03:51 PM
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After crunching some numbers, I arrived at a 32.4" wingspan to work with the Willy Nillies TD .020 power pack. That's 90% of the original Baby Bombshell (or 45% of the Buzzard Bombshell). I think this will make a nice full kit, so I drew a complete 1-sheet full size plan and laid out the parts for laser cutting.
Last edited by NX13688; May 04, 2021 at 03:56 PM.
May 04, 2021, 04:22 PM
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Easy bits first. I decided to use a single elevator to save a gram or 2. My first prototype flew just fine with that setup. I build on a magnetic board with fixtures that I designed and 3D printed. I wish I could have switched 20 years ago.
May 04, 2021, 04:32 PM
I'd rather be flying.....
JeffMac's Avatar
Looks like a really nice project !

Best regards,

Jeff
May 04, 2021, 09:01 PM
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Now on to the fuselage. There are a few formers and landing gear blocks to sub-assemble. Since my laser cutter is pretty small, I had to split the fuse sides and bottom into pieces. So those get joined, then doublers are added over the joints as well as at the front. Several formers are located between the sides, then the assembly is located into the slots in the fuse bottom.
Last edited by NX13688; May 25, 2021 at 09:11 AM.
May 05, 2021, 07:02 AM
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Army Grunt's Avatar
Looks good, "Watching"
May 05, 2021, 07:17 AM
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Now the rest of the formers go in, along with the battery platform. Then the landing gear blocks are installed, followed by 3 pieces of cross-grain sheeting.
May 05, 2021, 07:28 AM
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Originally Posted by NX13688
Now the rest of the formers go in, along with the battery platform. Then the landing gear blocks are installed, followed by 3 pieces of cross-grain sheeting.
Whos kit is it?
AG
Just looked ,an saw you cut the kit!!!">OUTSTANDING"<<
Last edited by Army Grunt; May 05, 2021 at 07:35 AM.
May 05, 2021, 08:38 AM
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Quote:
Originally Posted by Army Grunt
Whos kit is it?
AG
Just looked ,an saw you cut the kit!!!">OUTSTANDING"<<
Thanks! I had to talk the Mrs. into letting me buy a laser cutter, and part of my argument was "I can cut kits for other people with it. It'll practically pay for itself! Maybe. In a few years." So she rolled her eyes and said ok, and here we are.
May 05, 2021, 09:44 AM
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Army Grunt's Avatar
Quote:
Originally Posted by NX13688
Thanks! I had to talk the Mrs. into letting me buy a laser cutter, and part of my argument was "I can cut kits for other people with it. It'll practically pay for itself! Maybe. In a few years." So she rolled her eyes and said ok, and here we are.
>>>>>>>>>Sounds like a plan, KEEP IT GOING!!,,,,,
AG
May 05, 2021, 01:52 PM
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A few more miscellaneous pieces on the fuse. Servo tray, front wing dowel, upper cowl support, and turtleback stringers. Then the stringers are trimmed and the tailskid mount is put in.
May 05, 2021, 03:51 PM
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Landing gear. Main gear is soldered together from 2 pieces of .055 music wire that are bent to match flat patterns, then temporarily attached to the mounting blocks . I stripped a couple inches of hookup wire to get some fine copper wire that I wrapped around each joint before soldering with Stay-Brite flux and Bernz-O-Matic silver bearing solder. Being such a light plane, I'm sure using the old method of wrapping with heavy thread and glue would probably work OK too. I'm using laser-cut plywood wheel retainers that have a nice tight fit to the wire, so a drop of thick CA holds them on fine. Wheels are 1.5" GWS. The tailskid is a simple fixed .032 wire.
Last edited by NX13688; May 05, 2021 at 07:13 PM.
May 05, 2021, 04:16 PM
Thermals, Tom
RyanNX211's Avatar
The old BBB kit used to come with a cute decal.
Imagine a bomb cracking like an egg with a vulture chick
Emerging complete with helmet and goggles.
Latest blog entry: Steak and Old Timers
May 05, 2021, 04:31 PM
Thermals, Tom
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Found it.

http://www.thebuildingboard.com/2009...ll_02.html?m=1
Latest blog entry: Steak and Old Timers
May 05, 2021, 05:05 PM
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Originally Posted by RyanNX211
Thanks for finding that! I love the old logos. I redrew the original kit logo for my Scientific Commodore and made new ones in (simulated) gold leaf.
Last edited by NX13688; May 07, 2021 at 07:27 AM.


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