Edward Klepeis wrote:
Dear Paul
Gates rubber has an article on that subject and also says do not use
tap water in your car (which for use would in an aircraft) the water
contains salt and chlorene which reacts with alum parts of the eng and also
rots the rubber hoses from the inside out.The hose might look OK on the outside
but it is an accident looking for a place to happen. Use distilled water you
can buy it at wal mart for 60 cents a gal.- cheap insurance for safe flying.
Also there is a way of checking for electrolysis.use a 12volt digital
voltmeter set for 12volts attach one test lead to the neg battery post and
insert the other test lead into the rad coolent ,make sure the test lead
doesn't touch the filler neck or rad core.a reading above 0.3 volts
indicates stray current.you can find which accessory is the problem by
switching it on and off and watching the volt meter when the needle jumps
you found the acc. with the poor ground puts an end to electrolysis.
Regards
Ed
techwelding@comcast.net
I ran into an engineer at OSH that works for Cummins I think.
He did not have a card on him but hopefully he will join
up as I gave him my card.
He told me the life limiting factor on a diesel engine is the cooling
system. When the antifreeze gets old it turns acidic.
When that happens black low cost automotive hose becomes part of a battery
because of the conductive carbon in it. You can actually measure
the voltage with a digital voltmeter by putting one probe
on the hose and the other on the hose barb. The black hose
loses carbon to the mixture. This causes a reduction in strength
of the hose. The answer is silicone rubber hose and changing your
coolant once a year. This could be a factor in the two crashes
we have had due to cooling hose joint failures. In both cases the
people had been flying their rotary powered airplanes for several years.
Paul Lamar
The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/
Copyright 1998-2004 All world wide rights reserved.