Author Topic: Australian BOOMERANG in 1/56  (Read 300 times)

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johnnytodd

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Australian BOOMERANG in 1/56
« on: May 09, 2017, 05:58:18 AM »
My next project is the Australian Commonwealth Boomerang.  Its a plane I've loved since I was a kid - always wanted the Airfix model but never got around to buying one.    After comparing a couple different measured drawings - of course none of the measurements agree - I've settled on this set.  They are sized to my peculiar 1/56 scale.
« Last Edit: May 11, 2017, 06:03:02 PM by johnnytodd »

lastvautour

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Re: Re: Johnny Todd Models
« Reply #1 on: May 09, 2017, 08:35:18 AM »
Looking forward to your Boomerang.

Lou
« Last Edit: May 09, 2017, 02:40:10 PM by lastvautour »

johnnytodd

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Re: Re: Johnny Todd Models
« Reply #2 on: May 10, 2017, 05:02:30 PM »
Made a few photocopies of my plan, glue to the wood and then band saw through:


lastvautour

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Re: Re: Johnny Todd Models
« Reply #3 on: May 11, 2017, 03:45:36 AM »
Moving along nicely. May I suggest you move this Boomerang project to its own post. I will move it if you wish.

Lou

johnnytodd

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Re: Re: Johnny Todd Models
« Reply #4 on: May 11, 2017, 12:43:30 PM »
Today I started shaping the fuselage with my favorite tool:  This is a 1x4x24" board with 60 grit emery cloth (belt sander belt) glued to one side and 100 grit to the other side.  My technique is to drag the piece along removing quite a bit of material with each pass.  As I get closer to the desired thickness measurement I'll switch to finer grit on smaller sanding blocks.  Not much blade work in my method. As I sand I keep replacing the horizontal registration pencil marks to maintain the symmetry.

« Last Edit: May 11, 2017, 12:48:54 PM by johnnytodd »

lastvautour

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Re: Re: Johnny Todd Models
« Reply #5 on: May 11, 2017, 05:51:23 PM »
Keeping those reference lines can make or break the model. Good work.

Lou

johnnytodd

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Re: Australian BOOMERANG in 1/56
« Reply #6 on: May 13, 2017, 05:08:21 PM »
Progress today - fuselage is pretty much done and got the horizontal stabilizer glued.  Wing has correct airfoil shape - now need to set the angle for the dihedral. 
« Last Edit: May 15, 2017, 11:16:17 AM by johnnytodd »

johnnytodd

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Re: Australian BOOMERANG in 1/56
« Reply #7 on: May 15, 2017, 11:15:07 AM »
Over the weekend I got the four main pieces assembled and wing fillets done.  I use 2 part epoxy putty for fillet and for filling in all the seams.

lastvautour

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Re: Australian BOOMERANG in 1/56
« Reply #8 on: May 15, 2017, 12:15:45 PM »
Looks great John. I use wood filler for my filets.

Lou

johnnytodd

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Re: Australian BOOMERANG in 1/56
« Reply #9 on: May 16, 2017, 11:04:45 AM »
Doing a bit of excavating today.  I use a dremel to hollow out the cockpit and front of the engine cowl - no bloody fingers yet!  Still deciding if I want to build this with landing gear up or down. Also, not sure yet how to simulate the boomerang's "porcupine" exhaust baffle...

« Last Edit: May 16, 2017, 11:07:03 AM by johnnytodd »

lastvautour

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Re: Australian BOOMERANG in 1/56
« Reply #10 on: May 17, 2017, 10:36:43 AM »
Love it so far.

Lou

Model Maker

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Re: Australian BOOMERANG in 1/56
« Reply #11 on: May 17, 2017, 06:06:50 PM »
Model is looking great!!

I have the same problem with the porcupine exhaust for the Halifax models I am currently working on. I've been pondering this for a while and have come up with three possible approaches.

1) Placing some "dabs" of body filler onto either a piece of brass tubing or a wooden dowel and then filing / shaping the "dabs" to a uniform shape. I'm not sure how well the dabs will adhere  to the dowel / tubing long term, so this may not be a viable option

2) Crank up the Dremel with a cut off disc and grind diagonals into an oversized dowel. Alternately a triangular file could be used to cut in the diagonals / final shaping on the oversized dowel.

3) Use a wood burner / soldering iron with a wood burning tip to burn away material from an oversized dowel.

Not sure which would be best approach, but hopefully the above may provide you with some options for consideration.

-ken
« Last Edit: May 17, 2017, 06:08:38 PM by Model Maker »

johnnytodd

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Re: Australian BOOMERANG in 1/56
« Reply #12 on: May 17, 2017, 07:05:47 PM »
Ken,

I had one last idea regarding the porcupine exhaust which involved filing/dremeling cross hatch through the threads of a brass wood screw...  :o but in the end I wimped out and decided on the early style straight exhaust pipe...   

Model Maker

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Re: Australian BOOMERANG in 1/56
« Reply #13 on: May 18, 2017, 05:35:36 PM »
The concept of a threaded "something" to assist with establishing a uniform pitch is certainly a great idea. I will have to do some pondering, but I'm thinking of a jig using a large diameter bolt with a course thread rotated through a correspondingly sized nut to advance / reverse  a wooden dowel attached to the bolt. A wood burner held stationary would then to burn away the excess material. Will have to do  some experimenting.

I'll keep you advised. - thanks - ken

johnnytodd

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Re: Australian BOOMERANG in 1/56
« Reply #14 on: May 19, 2017, 05:01:48 AM »
Just about finished.  Now on to the primer.  I use a spraybomb sandable auto primer, with some 220 grit sanding between coats 1&2