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Creating reliable fire onset

Jack

Jack's picture

Hi,

We're shooting a shot film in a couple of week's time and we need to create a reliable fire - the fire is actually in frame for several shots so we can't just use clever lighting - we need fire! We've been told that we need a "flamebar" (a metal pipe with holes in it that can be buried in the ground, you then feed gas into this pipe). I have several questions about this that I'd love some feedback on:

1) Where can I get hold of a flame bar?

2) Would it be safe to make our own?

3) Will the flame bar easily get smothered? Do we need to inject a mix of oxygen and gas so it doesn't get smothered?

Here's a picture I found on Google Images (from this page):

Our flamebar needs only be about a meter long at most!

Warmest regards,
Jack


Stephen W

Hi Jack,

I'm sure a lot of people (especially on SP) will tell you that this is incredibly dangerous and that you need a professional pyrotechnics expert etc. They'd be right too! However, my friends and I have been doing stuff-on-fire and stuff-blowing-up for years :)

Never actually tried a flame bar though - I imagine it'd be quite risky and personally I'dd err on the side of trying to do it CG instead. I used some CG fire in my last film and it worked quite well. Obviously, without details of what you're planning to do it's difficult to say if it'd work for you, but thought I might suggest it.

Let me know if I can be of any help.

-------------
Stephen
www.aefilms.co.uk
www.redcamera.net


Jack

Jack's picture

Hi Stephen,

Thanks loads for the reply. Hmm... we hadn't considered using CG fire. A concern I'd have with using CG fire is that our fire features quite heavily in the film and the actor's face will be lit by the fire for a lot of the film so the fire has to look very convincing in several close, lingering shots. Of course, I'm sure it would be possible to shoot with a flicker box and overlay the fire in post but my gut feeling is that it'd be easier to build a fire on set. I'm going to phone round SFX houses in the next few days and I'll report back with any findings.

I'm half thinking of hacking together my own flame bar but the rest of the crew aren't so keen!

Jack


edeverett

edeverett's picture

hmm...
What's the difference between a flame bare and a barbecue?

A gas powered barbecue might be a good starting point to hack a flame bar together from, they must have all the safety bits already?

But maybe this is just an evening in the pub over-taking my common sense.

Ed.


Zara

Zara's picture

As exciting as making your own flame bar may be, I there are probably some major health and safety /insurance issues which need to be considered...


Jack

Jack's picture

Yes, there definitely are health & safety issues to be taking into consideration. We'll have a CO2 fire extinguisher on set at all times and a first aider. And lots of water.


edeverett

edeverett's picture

Jack,

What happened/is happening with this? Did you ever make a flame bar?

How did you get on with managing the fire on set?


Jack

Jack's picture

We got a "proper" flame bar from a place in Pinewood Studios called "Effects Associates". It consisted of 19kg of gas + lots of rubber piping + a metal ring with holes in it. It produced some impressive flames! The whole lot only cost 60 quid for the weekend.


Jack

Jack's picture

Here's a pic of the flame bar we used:


edeverett

edeverett's picture

How did it work on the sausages?

Looks like it might cause charring.


Jack

Jack's picture

Er... never mind the sausages... it damn near singed my eye brows! The flame you see in the above picture was with the gas set at about one fifth of the maximum possible output!

Over the course of the two-day shoot we almost emptied an entire CO2 fire extinguisher (not because anything was getting out of control but just because we often needed to re-set the fire back to "unburnt" state for the filming).

You can see more stills from that shoot here:

http://www.jack-kelly.com/gallery/v/film_stills/mirrors/


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Those sausages must have been pretty damn charred!


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Thanks for sharing. I enjoyed watching it and I think it'll be really good when fully animated. Alicyn did a wonderful job on the voice over. I'm not extremely familiar with the context of the story (relationship to ILB) since I wasn't around back then and only have read snippets of it over time. I wish you the best of luck with this.


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