Fuel/Water, Bearing/Rust--More Action

[Bob Pastorello]

http://www.hobby-lobby.com/fueltank.htm
is one place.

Bob Pastorello, Oklahoma
NSRCA 199, AMA 46373
rcaerobob at cox.net
www.rcaerobats.net


----- Original Message ----- 
From: "Ed Miller" <edbon85 at optonline.net>
To: <discussion at nsrca.org>
Sent: Sunday, December 07, 2003 2:40 PM
Subject: Re: Fuel/Water, Bearing/Rust--More Action


> George, is there a website we can view the Graupner tanks ??
> TIA...Ed M.
> ----- Original Message -----
> From: "george kennie" <geobet at gis.net>
> To: <discussion at nsrca.org>
> Sent: Sunday, December 07, 2003 1:03 PM
> Subject: Re: Fuel/Water, Bearing/Rust--More Action
>
>
> > Miniature Aircraft, (the helicopter people) makes a clunk that does not
> appear
> > to be brass, but I don't know if it's stainless. This thing has a very
> long
> > taper to the pick-up orifice allowing the tank to be drained allmost
> completely
> > dry, especially if you use something like a Graupner tank with the
recess
> in the
> > bottom of the tank.I've used these tanks in a lot of pattern models with
> very
> > satisfactory results.The 17 ounce size is just about perfect for 2&1/2
> times
> > thru the Masters sequence.
> > Georgie
> >
> > Bob Pastorello wrote:
> >
> > > On a whim, I just removed the MK tank from my Viper.  Alas, it hasn't
> seen
> > > any fuel in awhile, tank was empty except for just what can't be
drained
> > > through the klunk system.
> > >     So I took it apart, and the first discovery was a tarnished (but
not
> yet
> > > corroded) brass klunk.
> > >     The Second discovery was the unmistakable odor of acetic acid ON
the
> > > klunk.  Sniff test of the tank confirmed the same smell.  A VERY small
> > > amount of fuel remains- I'm talking a 1/4 oz or less...and that odor
was
> > > unmistakable.  Just like the smell from curing RTV, except not as
> > > pungent/strong.
> > >
> > > Theory - if all this chemistry is valid (and I don't have a clue) -
the
> > > large amount of air in the empty tank, with whatever moisture is prese
nt
> in
> > > it, does react with the exposed klunk material and the remaining fuel
> > > (methanol/nitro/oil) that was in the back of the tank.
> > >     At least it sure did smell like acetic acid and NOT "nitro"....as
> far as
> > > I know Ritches' Brew doesn't include acetic acid in it's additives.
> > >
> > > Interesting stuff.  So I installed a new, undamaged, shiny plated
> > > klunk....we'll see...
> > >
> > > Bob Pastorello, Oklahoma
> > > NSRCA 199, AMA 46373
> > > rcaerobob at cox.net
> > > www.rcaerobats.net
> > >
> > >   ----- Original Message -----
> > >   From: Rcmaster199 at aol.com
> > >   To: discussion at nsrca.org
> > >   Sent: Saturday, December 06, 2003 1:19 PM
> > >   Subject: Fuel/Water, Bearing/Rust--More Action
> > >
> > >   Joe Wagner, similar to Clarence Lee of RCM, has given sage advice
over
> the
> > > years.For what its worth, I unwittingly used aluminum tubing in my
Webra
> > > set-up from the start since that's all I had at the time. It's been
> almost
> > > 400 flights so far and the bearings still feel like new. It may be
> > > coincidence since the webra has larger bearings than the OS and Joe
> could be
> > > mistaken, but it's easy to test the proposed concept.
> > >
> > >   I intend to use the information he passed on more completely, and
see
> for
> > > myself. I urge others to do the same covering all engine flavors. I
will
> use
> > > teflon or aluminum tubing everywhere possible , and use a teflon block
> as
> > > clunk. Can't replace the brass spray bar and nipples without machining
> > > capability, but the other changes should reduce brass contact at least
> > > fourfold.
> > >
> > >   Mine will be Webra and Mintors, and since both are AAC constructed,
it
> > > automatically eliminates a possible source of catalysis
> > >
> > >   we'll see
> > >
> > >   Matt K
> > >
> > >   Bob Pastorello, Oklahoma
> > >   NSRCA 199, AMA 46373
> > >   rcaerobob at cox.net
> > >   www.rcaerobats.net
> > >
> > >   ----- Original Message -----
> > >   From: Rcmaster199 at aol.com
> > >   To: discussion at nsrca.org
> > >   Sent: Saturday, December 06, 2003 1:19 PM
> > >   Subject: Fuel/Water, Bearing/Rust--More Action
> > >
> > >   Joe Wagner, similar to Clarence Lee of RCM, has given sage advice
over
> the
> > > years.For what its worth, I unwittingly used aluminum tubing in my
Webra
> > > set-up from the start since that's all I had at the time. It's been
> almost
> > > 400 flights so far and the bearings still feel like new. It may be
> > > coincidence since the webra has larger bearings than the OS and Joe
> could be
> > > mistaken, but it's easy to test the proposed concept.
> > >
> > >   I intend to use the information he passed on more completely, and
see
> for
> > > myself. I urge others to do the same covering all engine flavors. I
will
> use
> > > teflon or aluminum tubing everywhere possible , and use a teflon block
> as
> > > clunk. Can't replace the brass spray bar and nipples without machining
> > > capability, but the other changes should reduce brass contact at least
> > > fourfold.
> > >
> > >   Mine will be Webra and Mintors, and since both are AAC constructed,
it
> > > automatically eliminates a possible source of catalysis
> > >
> > >   we'll see
> > >
> > >   Matt K
> > >
> > > =====================================
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> >
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> >
> >
>
>
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