Fuel/Water, Bearing/Rust--More Action

[Ed Miller]

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 present
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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