When I used to work at an FBO we had these arosal type cans with a tube that would go into the fuel tank.  We would put the fuel de-ice additive in the tank while we were pumping the Jet-A.  We would even do it during the summer months.  Although it might be 80 degrees on the ground, once the jets would climb to cruise altitude, it could get to below freezing.

Ah those were the days of a ramp rat.  Everyone should try it sometime in their youth....

Thanks for the compliment Falcon .

Please do not underestimate your teachers.  Experience is one thing however it only comes with knowledge.  Any person who feels that they can survive with experience alone is only fooling themselves.  A person no matter what trade or profession they are in must always continue to seek knowledge. 
Teachers are the finest exporters/conveyors of facts and knowledge and you would probably find many have experience in the specialized field that they teach in.

After 40 year of flying I realize I am not the quickest bunny in the woods any more...BUT...I learned over the years to make contacts and to ask questions.  Since I gave all my trade manuals to the museum I can still pick up the phone and call them or people like those at SPAR, Air Canada, people still serving in the Armed Forces and yes some Teachers.

And Falcon this Forum is full of very very knowledgeable folks from all walks of life...so don't ever be afraid to ask a question and that goes for anyone.

Just ask Hagar every time the poor fellow posts...who always has a question...that dam flying trucker LOL

Cheers...Happy Landings...Doug

This is a very intresting thread.  Its always nice to learn more about these old birds

i can offer a little bit of knowledge  

i currently work at an FBO and we use several types of de-icing fluids.  there are types 1-4,  type one is Propylene Glycol,usually mixed 50/50 with water, is kept heated( about 110 degrees F.) and sprayed on the surface to melt off thin layers of snow and ice. if the ambient temp. is below freezing or it is still snowing heavily or there is freezing rain, it will allow 15-20 minutes of effectiveness to get you off the ground.

type 4 ( i'm not sure of the chemical compound, 'cause we don't use it ) is used for longer holdover periods.  it is sprayed on after type 1 to keep water from freezing to the de-iced aircraft for about an hour.  using type 1, followed by type 4 is a process called Anti-icing.

type 2 is TKS.  aircraft like Hawkers use this method because they don't have bleed air heated leading edges or pnuematic boots.  TKS is held in a reservoir just behind the copilot and is fed to a mesh on the wing that soaks and allows the fluid to pass over the wing in flight keeping ice from forming.

i don't know what type 3 is, i've never seen it.
you can tell the types apart by color, they all smell sweet like anti-freeze.   1 is orange, 2 (TKS) is clear, 4 is green.

all prop planes i've seen no longer use the alchohol method for the prop de-ice.  they have electrtic heated boots.  even the vintage planes still used to haul cargo have ben retro fitted because it's more cost effective. the only planes that might still use it are ones restored to factory for airshows and exhibits.

for Codered:   the fluid in the aerosol cans is called PFA55MB or PFA56MB ,( also known as Prist )  it keeps ice crystals from forming in jet fuel and clogging filters.  it's almost always premixed now because almost every jet aircraft needs it.   Prist also helps to keep bacteria from growing in the fuel,  and they use in the summer too because at 30,000ft it's below freezing

Hi ruekesj:

Great information..Thanks!

Now...I am a bit rusty on the recovery of glycol...perhaps you could inform us...Most Military and Civil Airfields recover glycol and store it to be shipped back and recycled.
At what per-centage (the strength when tested on the ground) is that done?
Also I understand that which is not recovered from the ground is released usually to a sewage  treatment section on the airfield and actually feeds the bacteria.
Am I correct in stating that?
I also see now hot air as well as de-icing fluid can be used by the glycol spray trucks...I take it this is a cost saving as well as environmental procedure.
We have some members writing I believe term papers that your input might be interesting to them as how we are helping the environment by not releasing these chemicals directly into the environment.

Would look forward to your input....Thanks for Posting

Cheers...Happy Landings...Doug