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  #1  
Old 04-28-2020, 02:30 PM
harleyl harleyl is offline
 
Join Date: Oct 2005
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Default Smoke oil question

Is there something you can add to smoke oil to make different colors. I have a friend that is planning something for the 4th of July. He has 3 nozzles and is trying to do red,white, and blue.
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  #2  
Old 04-28-2020, 03:31 PM
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RV7A Flyer RV7A Flyer is offline
 
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Ah, the Holy Grail of smoke systems for reciprocating engines.
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  #3  
Old 04-28-2020, 05:30 PM
SMRacer SMRacer is offline
 
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Default Smoke

http://novaspecialties.com/colored-aerobatic-smoke/

Colored smoke in a piston looks possible, but requires an additional injector closer to exhaust exit.
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  #4  
Old 04-28-2020, 08:11 PM
RVStudent RVStudent is offline
 
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Exclamation Caution !!!

Their website shows the flashpoint at only 86 degrees F.
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  #5  
Old 04-28-2020, 08:43 PM
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Wasn't there also some concern about this staining paint? I may be misremembering, but I think this came up before in a discussion.
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  #6  
Old 04-28-2020, 10:14 PM
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scrollF4 scrollF4 is offline
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Harley,
I discussed this with Marvin at www.Smoke-System-Helper.com (a VAF advertiser). He said trying to dye smoke oil for heating in the exhaust pipe just burns the oil and gives you white smoke, no matter what color it was going in. Colored smoke requires colored dye injected way downstream in the cooler part of the exhaust pipe. Rather than "burn", it stays wet and is a cooler aerosol additive to the 'burned' smoke. Naturally, this requires an additional storage tank and spray apparatus (complexity and weight).

Marvin, does that sound about right?
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  #7  
Old 04-29-2020, 03:59 AM
harleyl harleyl is offline
 
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Thanks for the replies everyone. I'll pass this info on.
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  #8  
Old 04-29-2020, 06:29 AM
N733JJ N733JJ is offline
 
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Location: Wappingers Falls, NY
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Default Dr Smoke

We have a gentleman here that used to fly air shows in his SF-260. He had multiple colored smoke, controlled the various dyes with valves in the cockpit. His full time job was as an oral surgeon, show name was Dr Smoke.

He spent a lot of time experimenting with dyes Nd has never given out his formula as far as I know.

https://m.youtube.com/watch?v=fvDveutiVTE

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  #9  
Old 04-29-2020, 07:27 AM
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SeanB SeanB is offline
 
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Check the massive squadron that overflew Arrowhead Stadium a few years back. They used pink smoke. I recall something being mounted on the wingtips.
See Post 42...http://www.vansairforce.com/communit...stadium&page=5
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Last edited by SeanB : 04-29-2020 at 07:30 AM.
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  #10  
Old 04-29-2020, 01:46 PM
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Quote:
Originally Posted by SeanB View Post
Check the massive squadron that overflew Arrowhead Stadium a few years back. They used pink smoke. I recall something being mounted on the wingtips.
See Post 42...http://www.vansairforce.com/communit...stadium&page=5
That's more in the pyrotechnic regime. Not smoke oil, AFAIK.
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