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Scratchbuilt Grumman Tiger, 1/20


John Everett

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Greetings LSP,

About a week ago I posted a completed Cessna in 1/20 over on the Ready For Inspection forum. I enjoyed building that model so well that I decided to have a go in the same scale with the Grumman Tiger, AA-5B. This is actually a really great topic for scratchbuilding due to it's boxy design which minimizes compound curves and the fact that the airplane was glued together and doesn't require any rivet surface detail.

I began work on this back about four months ago and have now decided to pick up the model again.
53-A14439-0115-4-A43-9772-C97-C12-E12705

 

FB4377-BD-FB0-D-4-E51-AEB2-22-B008-DC04-

 

E72779-AE-D573-4-E53-A443-1279-B0-B55346

 

C01-D91-CC-D35-F-4569-9659-EF3-D5-B2-B0-

 

1179-FD8-C-C669-4323-8-E9-C-ADB229455-A6

 

8-CAB192-E-2-A04-4-BB4-9562-DF62-CA1672-

 

The first few tests in vacuuforming. I knew these would be rejects. But it let me know what I needed to change on the form (buck).

9452-A270-279-E-4-D40-AFF3-B3650-EB4624-

 

37934-D79-6027-4106-BFFC-F75-C0-CACC540.

 

IMG-20181215-225603488.jpg

 

And where it stands as of this evening:

IMG-20181216-230836512.jpg

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  • 2 months later...

With the Cessna finally finished I've been able to turn more attention back to the long languishing Grumman Tiger (1/20).

 

I've been making good use of the Silhouette Cameo cutter for wings and control surfaces.

IMG-20190314-141005262-HDR.jpg


IMG-20190314-141647619-BURST000-COVER-TO


IMG-20190315-202707855-BURST000-COVER.jp

 

.015" styrene in the Cameo


IMG-20190316-120136064.jpg

 

Repeating shapes are laminated into a solid whole.


IMG-20190316-160055491.jpg


IMG-20190316-160247385.jpg


 

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Wow, so it does cut thru .015" ??  I tried it with .005 and couldn't get a clean cut.

If you don't mind my asking, what are your  Speed , Force and Pass settings ?

Is that a Premium blade ?

 

Very nice work by the way  :speak_cool:

 

 

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12 hours ago, MikeMaben said:

Wow, so it does cut thru .015" ??  I tried it with .005 and couldn't get a clean cut.

If you don't mind my asking, what are your  Speed , Force and Pass settings ?

Is that a Premium blade ?

 

Very nice work by the way  :speak_cool:

 

 

Thanks for your interest and for following the build.

It wont go all the way through. There's still the need to break the sheet along the scribed line.

Depth: about 8-9. This doesn't matter so much. Just so long as it's anything greater than about 7.

Speed: slow. I set speed to 1. I have lots of time. 

Force: Middle. I use about 15 or 20. It is just plastic and doesn't require too much to cut.
Passes: 2 or even 3. Two seems to be best. 3 or even 4 (I tried that once) doesn't seem to make much difference.

Yes - Premium blade. The blue top blade is sold as a "durable" or "tough" blade. (It's also almost twice the price.) It does seem to last longer than the standard. And, obviously, a new blade is better than an old one. 

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Hi John,

 

What a great subject!

I learned to fly in it and for a long time I had the idea to scratchbuild one too.

But looking at my stash I shelved the idea. 

 

Great start and I will follow. :)

Keep up the good work!

 

Cheers,

 

Peter

 

 

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