Trick to keep castor in solution?

[Rudy Formanek]

Thought the additive was amyl acetate, not sure of the acetate part, but pretty sure of the amyl part!! I'm pretty sure some of the synthetic oils will help pull the caster into solution. Had good luck upping the Klotz 20% caster to 50% caster with 60% nitro. My local chemical supply house carries amyl acetate.

 

[Terry Keeley]

Thought the additive was amyl acetate, not sure of the acetate part, but pretty sure of the amyl part!! I'm pretty sure some of the synthetic oils will help pull the caster into solution. Had good luck upping the Klotz 20% caster to 50% caster with 60% nitro. My local chemical supply house carries amyl acetate.

By golly I think that's it!

I was thinking amyl nitrate but turns out that's a drug called "poppers": https://en.wikipedia.org/wiki/Poppers

Amyl acetate smells like bananas, that's where the "banana oil" was coming from somewhere deep in my hard drive: https://en.wikipedia.org/wiki/Amyl_acetate

Got something to work with, thanks a bunch!

 

[Rudy Formanek]

Was going to go back and add that I thought it was also called banana oil, but you had already replied to my post. You might also consider going 50/50 with an alcohol mixing polyalkyl ester oil like Redline alky or Motul micro??

 

[Terry Keeley]

Was going to go back and add that I thought it was also called banana oil, but you had already replied to my post. You might also consider going 50/50 with an alcohol mixing polyalkyl ester oil like Redline alky or Motul micro??

Thanks, already running 8% synthetic, only 4% castor.

Can't find much Googling around, might havta consult with some "'ol timers" I know...

 

[dave roach]

Terry

Using poppers will make your fuel hard. LOL

 

[Geraghty]

Yes it is amyl acetate.... Wisniewski at K&B told be about this about 30 years ago...

I don't remember the mixing ratio on how much you use.....

Thought the additive was amyl acetate, not sure of the acetate part, but pretty sure of the amyl part!! I'm pretty sure some of the synthetic oils will help pull the caster into solution. Had good luck upping the Klotz 20% caster to 50% caster with 60% nitro. My local chemical supply house carries amyl acetate.

 

[Rudy Formanek]

Gotta love E-bay!

http://www.ebay.com/itm/Amyl-Acetate-1000ml-in-a-Poly-Bottle-/111645698713?hash=item19fe9a2a99:g:4~YAAOSw7PBToc4m

 

[Marty Davis]

I sent a message to Ackerman. He will know and the ratios too.

 

[Terry Keeley]

Thanks guys, just the info I was looking for.

This place is great!

 

[Terry Keeley]

Just dragging this old thread up with an update.

Talked the folks at Blendzall and they put a very small amount of amyl acetate in their castor as a "blending agent".

They thought more might help, they're sending me some to try.

Anyone have any idea how much to use? Did you hear back from Ackerman Marty?

 

[henry velasco]

What Eric said

If I mix it any other way , with or without castor it seperates

 

[Jim Allen]

Terry,

Nitro Benzine will keep the castor in solution.

Jim Allen

 

[Dan Kramer]

mom always gave us 2 tablespoons full

 

[KenOlvis]

Best to shake not stir

 

[Terry Keeley]

Another update to this old thread.

Been having the same issues so did some testing. The amyl acetate seems to have no effect on keeping the castor in solution. I mixed up to 5% of it in my 70% fuel and with or without it the fuel started to cloud up at exactly 25*C (77F), that was with Blendzall castor. Warm it above that temp and it cleared right up.

I mixed some fuel with Sig AA castor and it stayed clear to 22C (72F). I'm not positive if the brand of oil is the difference, it might be the length of time sitting around that has something to do with it. The Blendzall fuel was six months old while the Sig was mixed fresh.

 

[Jeff Lutz]

Another update to this old thread.

Been having the same issues so did some testing. The amyl acetate seems to have no effect on keeping the castor in solution. I mixed up to 5% of it in my 70% fuel and with or without it the fuel started to cloud up at exactly 25*C (77F), that was with Blendzall castor. Warm it above that temp and it cleared right up.

I mixed some fuel with Sig AA castor and it stayed clear to 22C (72F). I'm not positive if the brand of oil is the difference, it might be the length of time sitting around that has something to do with it. The Blendzall fuel was six months old while the Sig was mixed fresh.

. Terry, Jim Allen spelled it wrong but he is correct. Nitro Benzene is what you need. If your fuel is milky white, pour some in and it goes crystal clear. My Dad learned that from the controlline speed days. ****, y'all keep it up and there will not be any secrets left. This thread shows a lot of people (even fast guys) did not know of this. Problem is, it is very hard to get your hands on it. Jeff lutz

 

[Terry Keeley]

Another update to this old thread.

Been having the same issues so did some testing. The amyl acetate seems to have no effect on keeping the castor in solution. I mixed up to 5% of it in my 70% fuel and with or without it the fuel started to cloud up at exactly 25*C (77F), that was with Blendzall castor. Warm it above that temp and it cleared right up.

I mixed some fuel with Sig AA castor and it stayed clear to 22C (72F). I'm not positive if the brand of oil is the difference, it might be the length of time sitting around that has something to do with it. The Blendzall fuel was six months old while the Sig was mixed fresh.

. Terry, Jim Allen spelled it wrong but he is correct. Nitro Benzene is what you need. If your fuel is milky white, pour some in and it goes crystal clear. My Dad learned that from the controlline speed days. ****, y'all keep it up and there will not be any secrets left. This thread shows a lot of people (even fast guys) did not know of this. Problem is, it is very hard to get your hands on it. Jeff lutz

I'm sure it would work too but if I could get my hands on some I doubt I'd want to handle it or burn it in fuel.

It "is considered a likely human carcinogen by the United States Environmental Protection Agency" and is highly toxic.

https://en.wikipedia.org/wiki/Nitrobenzene

 

[Rudy Formanek]

The whole story from Wikipedia::

Nitrobenzene is highly toxic (Threshold Limit Value 5 mg/m3) and readily absorbed through the skin.

Prolonged exposure may cause serious damage to the central nervous system, impair vision, cause liver or kidney damage, anemia and lung irritation. Inhalation of vapors may induce headache, nausea, fatigue, dizziness, cyanosis, weakness in the arms and legs, and in rare cases may be fatal. The oil is readily absorbed through the skin and may increase heart rate, cause convulsions or rarely death. Ingestion may similarly cause headaches, dizziness, nausea, vomiting and gastrointestinal irritation, loss of sensation/use in limbs and also causes internal bleeding.[6]

Nitrobenzene is considered a likely human carcinogen by the United States Environmental Protection Agency,[8] and is classified by the IARC as a Group 2B carcinogen which is "possibly carcinogenic to humans".[9] It has been shown to cause liver, kidney, and thyroid adenomas and carcinomas in rats.[10]

It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.[11]

If you are going to use this stuff, let others know so we can leave the area. Not so much for me, but I sure don't want my son or pregnant daughter or granddaughter breathing this stuff!!!

 

[Jeff Lutz]

Another update to this old thread.

Been having the same issues so did some testing. The amyl acetate seems to have no effect on keeping the castor in solution. I mixed up to 5% of it in my 70% fuel and with or without it the fuel started to cloud up at exactly 25*C (77F), that was with Blendzall castor. Warm it above that temp and it cleared right up.

I mixed some fuel with Sig AA castor and it stayed clear to 22C (72F). I'm not positive if the brand of oil is the difference, it might be the length of time sitting around that has something to do with it. The Blendzall fuel was six months old while the Sig was mixed fresh.

. Terry, Jim Allen spelled it wrong but he is correct. Nitro Benzene is what you need. If your fuel is milky white, pour some in and it goes crystal clear. My Dad learned that from the controlline speed days. ****, y'all keep it up and there will not be any secrets left. This thread shows a lot of people (even fast guys) did not know of this. Problem is, it is very hard to get your hands on it. Jeff lutz

I'm sure it would work too but if I could get my hands on some I doubt I'd want to handle it or burn it in fuel.

It "is considered a likely human carcinogen by the United States Environmental Protection Agency" and is highly toxic.

https://en.wikipedia.org/wiki/Nitrobenzene

. Lol, so is gas . Unfortunately we have all been exposed to it (especially benzene) in many products made and used not related to model boating. It took 780 mg of nitrobenzene to kill a lab rat versus 940 mg of nitromethane to kill a lab rat, so yes it is a little more dangerous than nitro. You cannot hardly get it anymore anyway.

 

[Michael Costanzo]

Another update to this old thread.

Been having the same issues so did some testing. The amyl acetate seems to have no effect on keeping the castor in solution. I mixed up to 5% of it in my 70% fuel and with or without it the fuel started to cloud up at exactly 25*C (77F), that was with Blendzall castor. Warm it above that temp and it cleared right up.

I mixed some fuel with Sig AA castor and it stayed clear to 22C (72F). I'm not positive if the brand of oil is the difference, it might be the length of time sitting around that has something to do with it. The Blendzall fuel was six months old while the Sig was mixed fresh.

. Terry, Jim Allen spelled it wrong but he is correct. Nitro Benzene is what you need. If your fuel is milky white, pour some in and it goes crystal clear. My Dad learned that from the controlline speed days. ****, y'all keep it up and there will not be any secrets left. This thread shows a lot of people (even fast guys) did not know of this. Problem is, it is very hard to get your hands on it. Jeff lutz

i guess we won't even talk about POLY PROPYLENE

yes us fast Plane guy's know a bunch of secrets too!!