afterburner effect

MrNobudy · Post by **MrNobudy** » Tue Mar 24, 2009 10:36 am

any ideas on how to create an afterburner effect? not just smoke, but the appearance of the burn? i thought about celephane or cling wrap colored, but wasnt sure if anyone else had any ideas.

Lichtbringer · Post by **Lichtbringer** » Tue Mar 24, 2009 10:46 am

Form the shape with some Aves, use it to make a mold - and cast it with clear resin?

Chacal · Post by **Chacal** » Tue Mar 24, 2009 4:52 pm

Best-and-impracticable idea: Aerogel. Too bad you have to pay an arm and a leg to get a sliver of it. But hey, if you've got the money, and you need just a small piece (say for a 1/72 engine)...

Rocketeer · Post by **Rocketeer** » Fri Mar 27, 2009 8:32 am

The exhaust flames on this model were cast using clear epoxy resin, tinted with casting resin dyes (bought from a craft store) in a rubber mold made off of an old Hawk Atomic Bomber exhaust flame. Worked well enough, although my scrappage rate was atrocious.

http://coffincorner.proboards.com/index ... 839&page=1

Godfather · Post by **Godfather** » Fri Mar 27, 2009 10:38 am

How'bout expanding foam, like the one used for sealing & insulating?

Home Despot has some: Linky!

MrNobudy · Post by **MrNobudy** » Fri Mar 27, 2009 11:20 am

Godfather wrote:How'bout expanding foam, like the one used for sealing & insulating?

Home Despot has some: Linky!

not a bad idea. just have to get it into a 'conical' shape.

Godfather · Post by **Godfather** » Thu Apr 02, 2009 12:36 pm

Hmm... this stuff takes a bit to cure, so maybe you can manipulate it (wear gloves, this stuff is caustic) to the shape you want?

bluesman · Post by **bluesman** » Tue Apr 07, 2009 4:10 pm

Can yuo sculpt the foam after it cures?

Whiteraven_2001 · Post by **Whiteraven_2001** » Wed Apr 22, 2009 6:00 am

Godfather wrote:How'bout expanding foam, like the one used for sealing & insulating?

That is a wicked diorama.... is it yours? And if it is, why haven't you shared before?

elend · Post by **elend** » Wed Apr 22, 2009 6:49 am

Wow. Most realistic explosions I have seen yet. I demand more and bigger pictures!

Joseph C. Brown · Post by **Joseph C. Brown** » Wed Apr 22, 2009 10:51 am

That was "Shadow Attack", by David Arzapalo, won a Silver at Wonderfest 2002:

http://www.starshipmodeler.com/events/w ... _shad1.JPG

modelnutz · Post by **modelnutz** » Wed Apr 22, 2009 11:07 am

Expanding foam can indeed be carved when it's cured.
The only issue is the open cell structure of the foam does not paint up very well without a ton of surface prep ( putty,sand,repeat)

A slightly off beat idea is.... use ice cubes to control the shape as the foam is expanding.

Sounds crazy...I know...but foam is a heat cured material and the cold of the ice slows the reaction and can therefore control the final shape of the foam.

Just putin'it out there...that's all.

Joseph C. Brown · Post by **Joseph C. Brown** » Wed Apr 22, 2009 12:34 pm

Possibly spray the foam into shaped objects, like say, balloons? Allow to cure, dispose of balloon. Old plastic salad bowls, maybe?

I know - help with the original request - you'd think the hard-core aircraft modelers would have come up with some thing useful by now...

walter · Post by **walter** » Sat May 23, 2009 5:18 pm

I have seen jets mounted on clear rod from the engine, you could paint the flame on the rod.

Old Wombat · Post by **Old Wombat** » Mon May 25, 2009 12:01 pm

walter wrote:I have seen jets mounted on clear rod from the engine, you could paint the flame on the rod.

Or hollow out a cone down the centre of the rod & paint it using thinned clear paints (to get that transparent red/orange/green/blue afterburner effect)?

Chacal · Post by **Chacal** » Mon May 25, 2009 3:45 pm

Get an UV LED shining down the rod from the base, have the part near the model painted with some glow in the dark paint.

B@F · Post by **B@F** » Wed May 27, 2009 6:19 am

A cotton wool could do the effect too:
http://papergallery.ic.cz/foto/pr-modul1.jpg
http://papergallery.ic.cz/foto/pr-modul2.jpg
(whole diorama can be seen here)
When made fluffy and airy and suspended in open space (I used my hair for this), it looks almost like a smoke. And after painting by water-based color markers (yellow, orange, red) resembles a flame. The drawbacks are that it's very fragile (windproof display case is a must) and I don't know whether it's applicable in larger scales (that shuttle is no more than 15 mm long).

Jeff · Post by **Jeff** » Wed May 27, 2009 7:56 pm

As far as smokey or misty effects go I like to use the fiber fill that they sell at aquarium stores. it works really great.

One of the best effects of after burner flame was a model mounted on acrylic rods. It had red lights in the model and the rods were hollow and they fed water up through the center and down the out side of the tubes. The model sat on a base that had a water reservoir and a small pump. The effect was so realistic it looked really great.

NNYGamer · Post by **NNYGamer** » Sun Aug 02, 2009 8:08 am

Chacal wrote:Best-and-impracticable idea: Aerogel. Too bad you have to pay an arm and a leg to get a sliver of it. But hey, if you've got the money, and you need just a small piece (say for a 1/72 engine)...

I just found you can get Aerogel at Unitednuclear plus radioactive ores.

Kylwell · Post by **Kylwell** » Sun Aug 02, 2009 11:39 am

NNYGamer wrote:
Chacal wrote:Best-and-impracticable idea: Aerogel. Too bad you have to pay an arm and a leg to get a sliver of it. But hey, if you've got the money, and you need just a small piece (say for a 1/72 engine)...
I just found you can get Aerogel at Unitednuclear plus radioactive ores.

And did ya look @ the prices for same? In block form?