Engine Air Dryer

Brian Lawson · Post by **Brian Lawson** » Fri Feb 17, 2012 11:58 pm

Hey Dave,

Test information they supply makes sense. Impossible to do inside any
engine, but even just moving large quantities of air, as with a fan,
will dramatically reduce condensation on surfaces, if not eliminate it
entirely, along the same idea as bubbling air through water keeps the
water from forming ice. And the eternal change of
temperature/pressure definitely causes vacuum to form in undesirable
places, so dry air would sure help.

The other alternative is to keep everything heated, and heating would
certainly cost more than the 50 cents US$ quoted for a months supply
of electricity there in Florida. On the other hand that may well
extrapolate to 50 bucks CDN$ next year though, here in Ontario (VBG
-political statement intended).

If I had a doubt about their claim, it would be the 3 Watts to power
this thing, unless it's got some control electronics for flow. And
the cost of oven drying the desiccant every month isn't included.
Maybe that would be equivalent to a heater?

And the price shouts "Hey, I'm STC'ed, I reduce weight, and I'm ONLY
$ 189.99 US. ". Hard to pass up something THAT unusual, eh?

Take care.

Brian Lawson,
Bothwell, Ontario.
XXXXXXXXXXXXXXXXXXXXXXXXXX
On Sat, 08 Nov 2003 20:07:53 -n0400, you wrote:

Guys

What do you think of the air dryer this company (www.flyingsafer.com)

are also

offering on their site? The idea is to pump de-humidified air through

the

engine between flights to keep the moisture content low thus keep the

engine

from rusting. Anyone have any industrial experience that would say if

this

would work? Basically they are using a container of dessicant to dry

the air.

If it is for real, wouldn't this solve the corrosion problem for engines

not

flown a lot? Any flaws in the theory?

Cheers,

Dave

Alan Hepburn wrote:

I see there's a gear warning system for amphibians mentioned on p118

of

the Novemeber Sport Aviation. Details at www.flyingsafer.com.

Function

appears similar to the one Montana Floats are offering, and it's not
outlandishly priced ($430 US).

Al Hepburn

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klehman · Post by **klehman** » Fri Feb 17, 2012 11:58 pm

My concern about heat is that if you just leave a heat source under the
oil pan it might tend to drive moisture from the crankcase and oil up
into the camshaft and cylinders where it can do more harm.

I have been known to use a blanket and leave a 40 watt trouble light
under an engine that has to be left open (such as a removed oil pan) for
awhile though. Seems to stop visible condensation.

Ken

Brian Lawson wrote:

Hey Dave,

Test information they supply makes sense. Impossible to do inside any
engine, but even just moving large quantities of air, as with a fan,
will dramatically reduce condensation on surfaces, if not eliminate it
entirely, along the same idea as bubbling air through water keeps the
water from forming ice. And the eternal change of
temperature/pressure definitely causes vacuum to form in undesirable
places, so dry air would sure help.

The other alternative is to keep everything heated, and heating would
certainly cost more than the 50 cents US$ quoted for a months supply
of electricity there in Florida. On the other hand that may well
extrapolate to 50 bucks CDN$ next year though, here in Ontario (VBG
-political statement intended).

If I had a doubt about their claim, it would be the 3 Watts to power
this thing, unless it's got some control electronics for flow. And
the cost of oven drying the desiccant every month isn't included.
Maybe that would be equivalent to a heater?

And the price shouts "Hey, I'm STC'ed, I reduce weight, and I'm ONLY
$ 189.99 US. ". Hard to pass up something THAT unusual, eh?

Take care.

Brian Lawson,
Bothwell, Ontario.

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David Ricker · Post by **David Ricker** » Fri Feb 17, 2012 11:58 pm

Brian

I think you have hit on what the issues are with this system. It will depend
on how much air you can pass therough the engine (and what parts of it) and for
how long in order to displace enough (existing and infiltrating) moisture to
make a difference. I would wonder how long the dessicant would continue to be
effective, this would relate to what capacity it would have to absorb water and
how long it would take to saturate this quantity. Of course we could figure it
out by going to the dessicant data sheet and doing a few calcs. if we were
really serious.

Just take the absorbing capacity and compare that to the moisture load in "X"
CFM (cm3/minute) of air and you will find out how long the dessicant will
remain useful.

Sounds like a great idea but more backup data is needed to say if it is indeed
worth it.

Cheers,

Dave

Brian Lawson wrote:

Hey Dave,

Test information they supply makes sense. Impossible to do inside any
engine, but even just moving large quantities of air, as with a fan,
will dramatically reduce condensation on surfaces, if not eliminate it
entirely, along the same idea as bubbling air through water keeps the
water from forming ice. And the eternal change of
temperature/pressure definitely causes vacuum to form in undesirable
places, so dry air would sure help.

The other alternative is to keep everything heated, and heating would
certainly cost more than the 50 cents US$ quoted for a months supply
of electricity there in Florida. On the other hand that may well
extrapolate to 50 bucks CDN$ next year though, here in Ontario (VBG
-political statement intended).

If I had a doubt about their claim, it would be the 3 Watts to power
this thing, unless it's got some control electronics for flow. And
the cost of oven drying the desiccant every month isn't included.
Maybe that would be equivalent to a heater?

And the price shouts "Hey, I'm STC'ed, I reduce weight, and I'm ONLY
$ 189.99 US. ". Hard to pass up something THAT unusual, eh?

Take care.

Brian Lawson,
Bothwell, Ontario.
XXXXXXXXXXXXXXXXXXXXXXXXXX
On Sat, 08 Nov 2003 20:07:53 -n0400, you wrote:

Guys

What do you think of the air dryer this company (www.flyingsafer.com)
are also
offering on their site? The idea is to pump de-humidified air through
the
engine between flights to keep the moisture content low thus keep the
engine
from rusting. Anyone have any industrial experience that would say if
this
would work? Basically they are using a container of dessicant to dry
the air.
If it is for real, wouldn't this solve the corrosion problem for engines
not
flown a lot? Any flaws in the theory?

Cheers,

Dave

Alan Hepburn wrote:

I see there's a gear warning system for amphibians mentioned on p118
of
the Novemeber Sport Aviation. Details at www.flyingsafer.com.
Function
appears similar to the one Montana Floats are offering, and it's not
outlandishly priced ($430 US).

Al Hepburn

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--
David A. Ricker
Fall River, Nova Scotia
Canada

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