Plastic Model Conversions

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georgegassaway

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FWIW - a Plastic Model Conversion article I wrote as part of a NARAM Tips series. A lot of generic tips plus a few examples of specific models.

Use THIS link first

A revised version is on the NAR website, with different photos. But it only shows the thumbnail images of drawings, not the enlarged version if you click them. See the original link above first.

Stuff like converting the 1/144 shuttle orbiter.

And the F-16.

And Jupiter-C and Saturn-V.

This is one of the most useful generic tips, for ANY model. Usually, not enough room in PMC's to store bulky cloth chutes. But normal chutes often have the shroud lines pull off too easily. Unless the lines are run across the top:

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Ez2cDave

Well-Known Member
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They only have PMC at NARAM every once in a while. It's a prang festival; competitors grumble about it, spectators love it...for the same reason!
That is why "PMC" ( Plastic Model Conversion ) has earned the nicknames "Plastic Model Destruction" and "Plastic Death" . . . Personally, I love PMC !

Dave F.

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Alan15578

Well-Known Member
nice! I have not been to a NARAM or built a PMC in many years. I was wondering how PMC competition may have evolved with LMR, up to 1500 g. Can you show any more examples?

rcktnut

Well-Known Member
Thanks for reviving, never knew it existed.

Ez2cDave

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TRF Supporter
Thanks for reviving, never knew it existed.
Plastic Model Conversion and Scale ( Precision Scale & Sport Scale ) should be revived . . . Recently, it seems that there is renewed interest in BOTH . . . Let's GO ! ! !

Dave F.

Alan15578

Well-Known Member
Thanks, I rarely peek into the gallery. I saw two or three kits that I would like to add to my collection. I loved the MMX conversions and photo documentation, cardboard cutout and all. However, it did not adress my questiono of PMC in the LMR world.

Daddyisabar

Oddrocs Rule!
TRF Supporter
Well, the reason that ban exists is that Harry Stine happened to see a poorly done submarine crash. Game over. Personally I think they should be fairly easy, you just need enough fin and some nose weight. Back then people were tempted to rely on the very small maneuvering planes in the prototypes, which were not really sufficient, even if you added a bunch of weight. Dynamic stability was not well understood by the rocket crowd in those days.

BTW putting rocket motors in the nacelles of an SR-71 is not a good idea. I've seen a number of attempts over the years and probably 3/4 of them have crashed due to unbalanced thrust and/or non-simultaneous ignition. In competition I think that is not allowed anymore.
I seen a numerous successful clusters with the Estes kit. Should not be that hard on a PMC. Like submarines, an over confident yet inexperienced "rocket scientist " gets in a competition, crashes the odd rocket and gets everyone scared. That leads to a good old fashioned banning. Idiots.

Ez2cDave

Well-Known Member
TRF Supporter
Thanks, I rarely peek into the gallery. I saw two or three kits that I would like to add to my collection. I loved the MMX conversions and photo documentation, cardboard cutout and all. However, it did not adress my questiono of PMC in the LMR world.
That Chinese CHANG-ZHENG CZ-2F weighed about 2-2.5 lb. , at liftoff.

The problem with higher power rocketry is mainly that there are no suitable plastic models that are large enough.

This Revell / Monogram 1/48 kit of the Lancer B-1B Bomber is the largest "convertible" kit I have ever seen.

https://www.ebay.com/itm/Vintage-c1998-Revell-Monogram-1-48-Scale-B-1B-Bomber-Lancer-Extras-Open-Box/184390565058

As I recall, it's about 3 feet long, when built.

20 years ago, that kit could be had for about $50 -$60 . . . Not anymore !

Here is the LINK to the INSTRUCTIONS . . .

https://www.scalemates.com/products/img/8/2/3/1181823-72-instructions.pdf

Dave

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Cape Byron

The BAR formerly known as Skippy-2
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Maybe something here from an Oz manufacturer. A WRESAT Redstone could be fun.

Some photo-etched parts too.

jqavins

Helpful Smartass
TRF Supporter
Nice models. Postage to here in Not-Oz? Well, there are the rwo-at-a-time combos that it says have free postage...

Cape Byron

The BAR formerly known as Skippy-2
TRF Supporter
You can buy Horizon kits directly from Amazon if you're in the US.

Interesting review of the Mercury Atlas here showing the decals under and over the LOX pipe. A lot of attention to detail:

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mach7

Well-Known Member
The Horizon kits are nice! A bit pricy, but very nice.

I'm wanting to do a PMC to the Bandai UFO Interceptor, but I also want to build the kit as a conventional kit.

I. Vac formed the body:

Here is what the kit built looks like:

I figure I can put a BT-5 inside the fuselage, make 3 fins from the rear landing gear and vertical stab.
The front missile will have to be figured out, I think a BT-20 will be too big.

Cape Byron

The BAR formerly known as Skippy-2
TRF Supporter
I'm wanting to do a PMC to the Bandai UFO Interceptor, but I also want to build the kit as a conventional kit.
Keep us in the loop with this project. I've always wanted a flying Interceptor. And a UFO. And a Lunar Carrier...

Ez2cDave

Well-Known Member
TRF Supporter
A little "mood music" . . .

Dave F.

mach7

Well-Known Member
Keep us in the loop with this project. I've always wanted a flying Interceptor. And a UFO. And a Lunar Carrier...
I'll probably have to start a build thread on it.

I have an idea on how to do the UFO.

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jqavins

Helpful Smartass
TRF Supporter
The front missile will have to be figured out, I think a BT-20 will be too big.
Would a BT-5 fit through the narrowest spot? If so, you could run one with a pair of centering rings forward and a pair of bulkheads with holes (cousins of centering "rings") behind. That would hold it connected and withstand bending loads at the junction. You might even fit a streamer inside the missile.

mach7

Well-Known Member
Excellent Interceptor! That looks too big to be the Bandai kit. Is it a resin kit?

It looks like you have a bit of a UFO display in the background? Any more photo's?

Ez2cDave

Well-Known Member
TRF Supporter
Excellent Interceptor! That looks too big to be the Bandai kit. Is it a resin kit?

It looks like you have a bit of a UFO display in the background? Any more photo's?

Alas, I am not the builder. The modeler who created that beautiful model, Romano De Marco, sent me those images, several years ago ( circa 2008, I think )..

If I recall correctly, I believe that it is either scratch-built or, possibly, a kit made by ENA Models ( about 27-29 inches long ) . . . Great talent !

Dave F.

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mach7

Well-Known Member
Would a BT-5 fit through the narrowest spot? If so, you could run one with a pair of centering rings forward and a pair of bulkheads with holes (cousins of centering "rings") behind. That would hold it connected and withstand bending loads at the junction. You might even fit a streamer inside the missile.
I like how your thinking here!
The BT-5 is actually slightly to wide to fit well in the fuselage. Surgery will need to be done.

mach7

Well-Known Member
Alas, I am not the builder. The modeler who created that beautiful model, Romano De Marco, sent me those images, several years ago ( circa 2008, I think )..

If I recall correctly, I believe that it is either scratch-built or, possibly, a kit made by ENA Models ( about 27-29 inches long ) . . . Great talent !

Dave F.
Great talent indeed!

RocketT.Coyote

Well-Known Member
Did conversions on Revell 1:32 F-104C and MiG-21MF. Also Monogram 1:144 Saturn V and 1:72 Hawk/Testors XF-92A. The latter being a test subject with inverted balsa t-tail for stability and flown on an MPC B3-3m.