Home > VansAirForceForums

-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

Old 06-21-2015, 08:13 AM
nbachert nbachert is offline
Join Date: May 2012
Location: California, MD
Posts: 321
Default Dehydrator plug question

I put the beads in the oven for an hour at 250 degrees and they were all blue. I took them out of the oven and they turned pink in a few seconds. Do I need to be really quick getting them back in the plugs, maybe bake them longer or hotter, or just buy new beads? Anyone know? Thanks,

Reply With Quote
Old 06-21-2015, 08:33 AM
Flyguytki's Avatar
Flyguytki Flyguytki is offline
Join Date: Jun 2007
Location: Fairbanks AK
Posts: 758

Nick, heres what I did. You can order a quart of new beads from amazon for $17. When my beads were turning pink i would just replace them and not worry about it.

Where are you at in enterprise? I finished my 7 just over 2 years ago but had to sell it before coming down here to fly 60's. How far along are you?

RV-7 N87DX Built, Flown, and Sold!
Reply With Quote
Old 06-21-2015, 09:20 AM
cfiidon's Avatar
cfiidon cfiidon is offline
Join Date: Apr 2008
Location: California
Posts: 652
Default Radar Range

Microwave works well for drying beads also.

Use a glass jar, dry them, then cap until needed.

RV-8 QB Titan ECi 191HP XIO-360
WW200RV Dynon D180 HS34 AP74
GNS430 SL30 GTX327 PS8000B Uavionix Echouat
"Pilots are alchemists... we turn gold into lead."
Reply With Quote
Old 06-21-2015, 10:17 AM
pilotkms's Avatar
pilotkms pilotkms is offline
Join Date: Mar 2007
Posts: 454
Default Bag em

I baked mine for 10 minutes at 175 without preheating. They turned blue so pulled them out and they sat on the counter while i did something else. Half hour later they were "used up" again. So i repeated the same time & temp but baggied them out of the oven. Still blue the next morning then refilled the "spark plug". All still good a week later.
RV 7A RV #9700 May 2017
N325KS the Flying K
Built in SoCal KCCB, now in GA @ KPXE
600+ Hours & 7X cross the USA
OSH flyin 2018 & 2019 & Petit Jean 2019
Reply With Quote
Old 06-21-2015, 01:01 PM
g zero g zero is offline
Join Date: Jun 2007
Location: palm coast fl.
Posts: 945
Default Beads

I used a metal pan and a heat-gun , blowing the hot air into the pan directly on the beads .
N 666 TA
First Flight 2-3-2015 🚀
2017 donation paid
Reply With Quote
Old 06-21-2015, 05:07 PM
RV7A Flyer's Avatar
RV7A Flyer RV7A Flyer is offline
Join Date: Jul 2013
Location: US
Posts: 2,367

Reminder to be cautious when using them around your cylinders...Lycoming says somewhere that if you end up spilling them in the cylinder, it has to be pulled.

No, I didn't have that happen to me, thank heavens...
Reply With Quote
Old 06-21-2015, 05:34 PM
BillL BillL is offline
Join Date: Sep 2007
Location: Central IL
Posts: 5,742

Sorry, I don't have the reference, but you can google.

What I recall is the color is an indicator and it is the last step in absorbing water. The beads need to be baked for more time. I do mine for several hours at 300F in the oven. It is not as humid as LA (Lower Alabama) in the summer.

Lord Kelvin:
I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.
Reply With Quote
Old 06-21-2015, 06:29 PM
xblueh2o xblueh2o is offline
Join Date: Apr 2011
Location: SF East Bay
Posts: 859

I have small plastic containers full of desiccant in each drawer of my tool box that are gold when dry and green when wet. I heat them at 250 for 3 hours to recharge them. I noticed when I did a shorter heat cycle they started to change back from gold to green before I got them back to the airport.
RV-8 with the Showplanes Fastback conversion
Emp completed except for glass work
Wings completed except for bottom skin and glass work
Fuselage underway
N18451 reserved
Reply With Quote
Old 06-21-2015, 08:40 PM
nbachert nbachert is offline
Join Date: May 2012
Location: California, MD
Posts: 321

Thanks for the replys guys. I'll try baking longer.
Reply With Quote
Old 06-28-2015, 06:46 PM
219PB 219PB is offline
Join Date: Aug 2014
Location: Victoria, Tx
Posts: 455

One thing is that if you are using an oven to bake the desiccant you must open the oven door about every ten minutes just for a couple of seconds to let the moisture escape. An oven is designed to keep the moisture in for baking purposes. Heating the desiccant beads to 350F for one hour is sufficient. Mare sure that they are not more than 2 or 3 beads deep. I stir them around about half way through. After one hour you can take them out and let them cool and place in a sealed plastic container. I open the container every 3-4 weeks and recharge my desiccant filled spark plugs. Once the whole jar is exhausted I will recharge the lot.
Paul Bonorden
RV-6A Flying
My Builders Website
Victoria, TX
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 04:52 PM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.