VansAirForceForums  
Home > VansAirForceForums

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

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.






VAF on Twitter:
@VansAirForceNet


Go Back   VAF Forums > Model Specific > RV-12/RV-12iS
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 01-05-2023, 09:33 PM
aturner's Avatar
aturner aturner is offline
 
Join Date: Jan 2005
Location: Clarion, Pennsylvania
Posts: 585
Default

The problem in the northern states is bit more difficult than in the south. The floor of an unheated hanger freezes up hard and the airplane sitting over that frozen concrete will lose radiant heat to the cold floor. Airframe temp can remain below air temp, and dew point, day after day after day. Circulating air through the room just results in more condensation. I've think that throwing a bit of heat into the airframe and engine compartment is the only solution, short of heating the entire hangar. I also throw some thin styrofoam sheets and rugs under the airplane to create a thermal break between the airframe and floor. Not sure if it helps much, but it can't hurt.
__________________
-Andy Turner
RV-10 N784JC
Reply With Quote
  #12  
Old 01-05-2023, 11:29 PM
jliltd's Avatar
jliltd jliltd is offline
 
Join Date: Sep 2013
Location: Rancho San Lorenzo
Posts: 1,390
Default

Great idea about the box fan. That's similar to what citrus farmers do with fans mixing the varying ambient air to protect their trees from frost. If you own your hangar you might investigate spraying the ceiling and walls with spray-in foam. We did 2" on the walls and bifold door and then 2.5" on the ceiling. You can feel the difference just walking in from the outside. Add an air circulation box fan like Dan mentioned and things ought to stay nice. With the insulation a small space heater or electric oil-filled radiator could be added. Another benefit with spray-in foam in a metal building is getting all the cracks sealed to keep wind-blown dust out in the Spring.
__________________
Jim Ivey
RV-8
Reply With Quote
  #13  
Old 01-06-2023, 05:59 AM
Amadeus's Avatar
Amadeus Amadeus is offline
 
Join Date: Nov 2020
Location: Basalt, CO/Lexington, KY
Posts: 193
Default

Quote:
Originally Posted by DennisRhodes View Post
Maybe a heat blanket or other source of heat inside the cabin could minimize this? Especially for instrumentation. Or better yet an outside the cabin heat source with duct routed to the inside. That's a lot of condensation.
I use a pet bed heater.

A heated blanket (for human beds) would be nicer and cover more area but they all have switches that cannot be turned on by my SwitcheOn box. I've considered cutting the cord on a heated blanket and installing a plug so that I could use one of these but I wasn't certain if the switch contained some sort of regulator.

Example:
https://www.petco.com/shop/en/petcos...pet-bed-heater
__________________
Jayson
RV-12iS
E-LSA
Donated
“Never feel sorry for a man who owns a plane.” -Charles Morse (Anthony Hopkins) Movie - "The Edge" https://youtu.be/dJD0lB4zRes
"...except during the month of Annual Condition Inspection." -Me (in the hangar)
"My first wife didn't like airplanes." - Gordon Baxter
Reply With Quote
  #14  
Old 01-06-2023, 07:49 AM
DaveO DaveO is offline
 
Join Date: Dec 2012
Location: Greenfield, IN
Posts: 386
Default

Keeping the air temp and the building temp close to the same temp. is the key to moisture build-up. I have concrete floor, no insulation and no problem with moisture. I have abundant air vents in the hanger ceiling. Just keep the air temp the same as the outside.
__________________
Dave

RV-7A N1243A Sold
Reply With Quote
  #15  
Old 01-06-2023, 08:01 AM
bobnoffs bobnoffs is offline
 
Join Date: Jul 2012
Location: n. wi
Posts: 980
Default

when i get this moisture and i happen to be at the hangar i set up a box fan and feed it from a timer that is set to go off in 12 hrs. at least that gets rid of it when i run into it. in the spring the floor sweats a lot as the frost is going out. again, the box fan helps warm the floor up to oat and evaporate the water.
__________________
Bob Noffs
n. wi.
dakota hawk/jab 3300 built and flying. sold 6/18.getting serious about the 12. in the hangar now as of 10/15/19
RV-12 kit as of 9/13
RV-12 airworthiness cert. 11/30/2021
first flight 7/25/2022
Reply With Quote
  #16  
Old 01-06-2023, 08:02 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,856
Default

I’m still looking at options to heat cabin interior to prevent condensation. I found a 12V 100W heater with a small fan that might do the job.

My PC680 battery is connected to an Odyssey OBC-6A battery charger 24/7 whenever the airplane is in the hanger. I can easily run this heater off the airplane battery and the charger will top off as necessary. A small 12V temperature controller can be set for 70F shutoff. The heater would be fused for safety…
-
Attached Thumbnails
Click image for larger version

Name:	Screenshot 2023-01-06 at 8.52.57 AM.png
Views:	40
Size:	971.4 KB
ID:	36301  Click image for larger version

Name:	Screenshot 2023-01-06 at 8.56.06 AM.png
Views:	36
Size:	219.1 KB
ID:	36302  Click image for larger version

Name:	Screenshot 2023-01-06 at 8.59.54 AM.png
Views:	27
Size:	2.29 MB
ID:	36304  
__________________
-
Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 830

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
Reply With Quote
  #17  
Old 01-06-2023, 08:26 AM
MacCool's Avatar
MacCool MacCool is offline
 
Join Date: Aug 2020
Location: central Minnesota
Posts: 1,482
Default

Quote:
Originally Posted by DaveO View Post
Keeping the air temp and the building temp close to the same temp. is the key to moisture build-up. I have concrete floor, no insulation and no problem with moisture. I have abundant air vents in the hanger ceiling. Just keep the air temp the same as the outside.
If I heat my hangar at all, I get ice on the roof melting, which runs off to the ground in front of my hangar, then freezes. Best case….a 6 foot strip of ice and ice ridge just outside the bifold making it difficult or impossible to get the plane out. Worst case…the door freezes to the ground and won’t open. I know this from experience with a couple of bullet heaters a couple of years ago while doing a winter avionics project.

If one doesn’t have an insulated and heated hangar, best/simplest solution in this climate is to manage condensation by decreasing humidity in the engine. Fortunately (or unfortunately) up here the dew point and ambient temps in the winter are generally far enough apart that condensation on the airplane and in the cockpit doesn’t happen.
__________________
RV-9A, 2011, bought flying
IO-320D1A (factory new), C/S
Dual Pmags
IFR equipped
AFS 5400/3500, G5, IFD440 navigator,
bunch of other stuff
Reply With Quote
  #18  
Old 01-06-2023, 09:52 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,856
Default

I’m still working this problem and have decided to just monitor the situation before taking any action... I just ordered two recording temp/humidity sensors and will place one in the airplane cabin and leave one out in the hanger. By comparing the two stored temp/humidity readings I should be able to tell if the cabin is getting condensation. It’s a starting point…
-
Attached Thumbnails
Click image for larger version

Name:	Screenshot 2023-01-06 at 10.48.11 AM.png
Views:	32
Size:	527.3 KB
ID:	36311  Click image for larger version

Name:	IMG_4649.jpg
Views:	31
Size:	237.3 KB
ID:	36312  
__________________
-
Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 830

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H

Last edited by Piper J3 : 01-06-2023 at 09:55 AM.
Reply With Quote
  #19  
Old 01-06-2023, 11:00 AM
JonJay's Avatar
JonJay JonJay is offline
 
Join Date: Jan 2007
Location: Battleground
Posts: 4,390
Default

Metal building insulation is relatively cheap when installed during construction. They make products simply called “metal building insulation”, a roll of fiberglass faced with a vapor barrier. It’s rolled out before the sheet steal is screwed down. Unfortunately, many hangars are built just like the one shown on the opening page that is for rent. Nothing.
Insulation and venting avoids the condensation problem. Adding insulation to an existing metal building is doable but not easy or economical.

On the Coast, I heat with forced air to 60deg. F and have a commercial dehumidifier. Electricity is cheap here but it is still an expensive bill in the winter. I keep the hangar at 50% or better humidity. Nothing corrodes and I don’t need to preheat! Not an option for everyone especially those in cheaply built rental hangars.
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.

RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.

Last edited by JonJay : 01-06-2023 at 11:03 AM.
Reply With Quote
  #20  
Old 01-06-2023, 01:05 PM
rv6n6r's Avatar
rv6n6r rv6n6r is offline
 
Join Date: May 2007
Location: Gearhart Oregon
Posts: 576
Default Air Dryr 1000

I too get condensation in the hangar sometimes (OR coast). I have one of these that I keep on the floor of my cockpit in the winter. No fan just some low heat. I honestly don't know if it does any good but I feel like it can't hurt. It does mean the seats aren't so hard when I first get in
Attached Thumbnails
Click image for larger version

Name:	air_dryr_1000.jpg
Views:	41
Size:	90.9 KB
ID:	36318  
__________________
Randall Henderson
RV-6 / O-360 / CS, 1600+ hrs, 1st flight Sept. 1999
Outstanding Workmanship OSH 2000, Craftsmanship award AWO 2000
Airport committee chair & AOPA ASNV for Seaside, OR Municipal (56S), www.seasideairport.org
Last Donated December 2022
Reply With Quote
Reply


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 12:36 AM.


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.