Author Topic: Novice - Shaping bubble canopy  (Read 184 times)

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lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #15 on: August 11, 2017, 04:20:19 PM »
"Mustang Mk IV Bubble Canopy"

I have elected to make a canopy section rather than the entire Mustang. I will transfer the Mustang build to my board.

First is to scale your drawing to the size you want. I used the side views and cross sections from http://drawingdatabase.com/north-american-p-51b-mustang/

Lou

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #16 on: August 11, 2017, 04:37:16 PM »
"Mustang Mk IV Bubble Canopy"

I measure 7cm from J forward and 15mm below the horizontal panel line. draw line A. Next draw a line B that sits just on top of the fuselage. This will be the fuselage portion. The block of wood is 7cm long and 20mm thick. The last photo show where the section fits on to a full fuselage.

Lou

« Last Edit: August 12, 2017, 03:31:04 PM by lastvautour »

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #17 on: August 11, 2017, 04:42:11 PM »
"Mustang Mk IV Bubble Canopy"

Next do the same on the reverse side and glue to the wood block.

Lou
« Last Edit: August 12, 2017, 03:31:23 PM by lastvautour »

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #18 on: August 12, 2017, 02:53:46 PM »
"Mustang Mk IV Bubble Canopy"

Glue canopy cutouts on both sides and shape to block state. Not the overlap of both pieces.

Lou
« Last Edit: August 12, 2017, 03:31:41 PM by lastvautour »

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #19 on: August 12, 2017, 02:58:43 PM »
"Mustang Mk IV Bubble Canopy"

Find a suitable top view (Note I did not) and glue to the bottom of the canopy and shape to block form. The green section in photo 2 will be removed later.

Lou

Note, the drawing shows a much earlier front panel.
« Last Edit: August 12, 2017, 03:31:59 PM by lastvautour »

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #20 on: August 12, 2017, 03:06:52 PM »
"Mustang Mk IV Bubble Canopy"

Photo 1 - I reversed the image and made a full cross section at E and J
Photo 2 - Glue the E cross section to the front of the block
Photo 3 - Glue the J cross section to the rear of the block.
Photo 4 & 5 - Work slow and remove the wood outside the cross section lines. I used a knife at first and followed with my favorite tool
Photo 6 - Once fuselage section is shaped, draw the canopy section. Note the curvature of the fuselage makes this painful.

Lou
« Last Edit: August 12, 2017, 03:32:17 PM by lastvautour »

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #21 on: August 12, 2017, 03:17:22 PM »
"Mustang Mk IV Bubble Canopy"

Photo 1 - incorrect shape to the forward panel
Photo 2 - correct shape but not quite right yet. I needed to be centered
Photo 3 - I draw contour line by placing my finger on the side of the wood and adjusting the pencil for different depths. Running on both sides give me a guide to follow. The trick is to take off small amounts of wood and finish shaping with my favorite tool
Photo 4 - Sand to shape and follow with sealer and paint later.
Photo 5 - My favorite tool for shaping. Sand paper and a hardware store paint stick.

Lou
« Last Edit: August 12, 2017, 03:32:35 PM by lastvautour »

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #22 on: August 12, 2017, 03:23:26 PM »
"Mustang Mk IV Bubble Canopy"

Now for the do or die section
Photo 1 - Remove the section of wood where the canopy will sit.
Photo 2 - Try to match the two pieces as close as possible. The smaller the gap the less filler you will need.
Photo 3 & 4. The bubble canopy tutorial is done. I hope this helps.

Lou

PS - Airliner/cargo next.
« Last Edit: August 12, 2017, 03:34:06 PM by lastvautour »

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #23 on: August 12, 2017, 03:44:00 PM »
In my haste I neglected to answer your comments.

Rafa - yes this would work great with an F-86.

John - you are absolutely correct in pointing out the separate piece does make a sharper join and better defines the canopy. I may change my wicked ways and start doing separate canopies after finishing what I have on the bench. I think Harvey's Bearcat may be something to try.

Lou

Rafael

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Re: Novice - Shaping bubble canopy
« Reply #24 on: August 12, 2017, 04:17:02 PM »
Thank you, Lou. This is brilliant work. Both methods are great. Now I'm itching to have my stuff at hand and get some pieces of wood to start chipping and sanding away.

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #25 on: August 12, 2017, 06:32:15 PM »
You are welcomed Rafa. I hope to see some progress soon.

Lou

Boomerang

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Re: Novice - Shaping bubble canopy
« Reply #26 on: August 13, 2017, 01:19:43 AM »

 Well Done Lou. Learned a bit.

Cheers
 Gordon

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #27 on: August 13, 2017, 05:10:18 AM »
Thank you Gordon.

I am wondering if I could splice this canopy/fuselage into my existing P-51 project???????

Lou

Boomerang

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Re: Novice - Shaping bubble canopy
« Reply #28 on: August 13, 2017, 02:21:43 PM »

 You should be able to.

 Cheers

 Gordon

lastvautour

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Re: Novice - Shaping bubble canopy
« Reply #29 on: August 13, 2017, 03:55:25 PM »
I will consider that option.

Lou