VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 02-27-2019, 06:41 PM
dreed dreed is offline
 
Join Date: Nov 2016
Location: Camas, WA
Posts: 370
Default Instrument fans

Any arguments pro/con instrumentation fans in top of the glare shield. If pro, any recommendations on the fans?

Advanced is building my panel which will be Dual 5600's, 1 dynon comm, but planning for a Avidyne 540 in the future.

Thanks!
dan
__________________
Dan Reed
Camas, WA
RV-7A - Slider in progress - N167DR (reserved)
Sitting in the paint booth, then final assembly/inspection time
2018 and 2019 VAF dues paid
Reply With Quote
  #2  
Old 02-27-2019, 08:29 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
Default Defrost fans

Pros...Also functions as defrost. Actually I don't know first hand. Mine isn't flying yet.
I bought two fans and grills from Steinair. My hope is that they tested them.
Two 3" holes and screw holes were cut before painting the glareshield. Fingers crossed.
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
Reply With Quote
  #3  
Old 02-27-2019, 09:25 PM
dreed dreed is offline
 
Join Date: Nov 2016
Location: Camas, WA
Posts: 370
Default

Thanks Larry- that is sort of my thinking too on defrost. I live in the PNW, so they may come in handy
__________________
Dan Reed
Camas, WA
RV-7A - Slider in progress - N167DR (reserved)
Sitting in the paint booth, then final assembly/inspection time
2018 and 2019 VAF dues paid
Reply With Quote
  #4  
Old 02-27-2019, 10:23 PM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
Default

Quote:
Originally Posted by dreed View Post
Thanks Larry- that is sort of my thinking too on defrost. I live in the PNW, so they may come in handy
I couldn't get a fan on the glare shield, as the 6 is shorter (my fan is from below for avionics cooling). The canopy only frosts up on the ground when temps are well below freezing. The moist air that I exhale condenses on the canopy. Opening the canopy for about 5 seconds clears it for a few minutes. Never experienced interior frost while flying all sorts of different temps down to -15.

Larry
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
Reply With Quote
  #5  
Old 02-28-2019, 03:00 AM
maniago's Avatar
maniago maniago is offline
 
Join Date: Aug 2014
Location: Bowie MD
Posts: 886
Default

I have four fans - two 1.5"x1.5" under the glareshield pointed at opposite sides of my center avionics stack, and two 1x1 fans to pull any hot air from below the shield to above. I doubt any of it is really needed, but my fans were from other projects so easy to do, and I have them on a separate breaker so I can kill them as necessary. Lots of 12v computer fans to be had of all sizes, and even the small ones will move a boat load of air, so dont get caught up on size, just look at CFMs. These are the little ones I used http://www.frozencpu.com/products/19...-189BK-2B.html

IMHO you can forget any auto type defrosting from whatever air is generated by the avionics, but as noted by someone else, just moving the air around above the shield may give you some benefit.

If you really think you want or need warm defrosting, then you ought to consider plumbing engine heat to the windshield (which will get you internal defrost, but prob not any external) or put in a hot plate if youre really gonna get after it meaningfully.
__________________
Mani
Busby MustangII (FoldingWing) Pending DAR.
Don't be a hater; I'm a cousin with thin wings!
N251Y (res)

Last edited by maniago : 02-28-2019 at 03:09 AM.
Reply With Quote
  #6  
Old 02-28-2019, 05:20 AM
SeanB's Avatar
SeanB SeanB is offline
 
Join Date: Dec 2006
Location: Colorado Springs
Posts: 576
Default

If a tipper canopy, make sure you locate far enough forward so you don't get interference where the frame and panel meet.
__________________
SEAN BLAIR V7
Colorado Springs, CO
http://www.mykitlog.com/sblair
2020 VAF SUPPORTER
Reply With Quote
  #7  
Old 02-28-2019, 08:54 AM
dreed dreed is offline
 
Join Date: Nov 2016
Location: Camas, WA
Posts: 370
Default

Thanks All-

The vents and plates from Stein look very reasonable and install should be relatively easy at this point (slider). I did add a couple extra switches on the panel so I should be good there too.

Dan
__________________
Dan Reed
Camas, WA
RV-7A - Slider in progress - N167DR (reserved)
Sitting in the paint booth, then final assembly/inspection time
2018 and 2019 VAF dues paid
Reply With Quote
  #8  
Old 03-03-2019, 03:05 PM
flyvansrv7 flyvansrv7 is offline
 
Join Date: Apr 2018
Location: bellevue,Nebraska
Posts: 20
Default here is what I did

I mounted two 5" computer muffin fans with grills and filters all from amazon.
I originally cut the holes two far forward not sure what I was thinking so then had to add backing plate and move them aft otherwise I think it should work well. I will have to cut holes in whatever I use as a glare shield mat for these two fans and the 3 GPS antennas that sit up there as well as compass. Fans are controlled with a panel mounted switch labeled avionics fans. I have 2 GDU460, GTN650, GTR200, GMA245, GMC307, G5, IBBS back up battery, and VPX pro under panel so I think some airflow is a must.

The fan grills are 3 pcs, the fixed grilled that is bolted thru the skin and holds the fan and then a snap on grill with foam filters that are easily removable.

https://photos.app.goo.gl/cwGVSC4tWF4tD7VS9
__________________
John Price
Bellevue NE
N717HV RV7 flying 10-28-19

flyvansrv7@gmail.com

Last edited by flyvansrv7 : 03-03-2019 at 03:08 PM.
Reply With Quote
  #9  
Old 03-06-2019, 08:19 AM
Raymo's Avatar
Raymo Raymo is offline
 
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,189
Default

Another vote for the computer fan(s). I pulled some out of some old HP servers but only installed one for circulation / defrost.

__________________
Ray
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)

Last edited by Raymo : 03-06-2019 at 08:22 AM.
Reply With Quote
  #10  
Old 03-19-2019, 08:58 AM
n4322b n4322b is offline
 
Join Date: Jul 2014
Location: Scotland
Posts: 24
Default

Does anyone have an ok indication from vans on the fan apertures in the forward cover ?
I?m planning the same and it might placate the authorities here
Cheers
Ian
__________________
Fuji FA200 / 160 - sold
Sonex - Aerovee - Sold
RV7 in build
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 03:45 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.