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.

  #41  
Old 10-27-2016, 07:27 AM
AlexPeterson's Avatar
AlexPeterson AlexPeterson is offline
 
Join Date: Sep 2005
Location: Ottertail, MN
Posts: 2,459
Default

Quote:
Originally Posted by Marc Bourget View Post

Do you have any data? Does your "full pressure" mean the dynamic pressure at the speed you were measuring?

mjb
Marc, yes, based on speed, temp, altitude, etc., it was very nearly full recovery. The data is probably in a stack of stuff in a safe place... It might even be somewhere in these forums, but I don't recall.
__________________
Alex Peterson
RV6A N66AP 1750+ hours
KADC, Wadena, MN

Last edited by AlexPeterson : 10-27-2016 at 07:31 AM.
Reply With Quote
  #42  
Old 10-27-2016, 07:29 AM
AlexPeterson's Avatar
AlexPeterson AlexPeterson is offline
 
Join Date: Sep 2005
Location: Ottertail, MN
Posts: 2,459
Default

Quote:
Originally Posted by rv8ch View Post
Thanks Alex, those are probably the most clear pictures of the way to do the baffles around the inlet that I've seen, and clear up a lot for me.
Mickey, I'm glad it helps. I just couldn't see putting a square peg in a round hole I don't recall how the plans said to deal (or not) with that area. I think I just used some .016" aluminum to make that fillet.
__________________
Alex Peterson
RV6A N66AP 1750+ hours
KADC, Wadena, MN
Reply With Quote
  #43  
Old 10-27-2016, 10:41 AM
rvsxer rvsxer is offline
 
Join Date: May 2007
Location: Inver Grove Hgts, MN
Posts: 358
Default

Alex, I agree. Those are very good pictures. I just changed all my forward baffling from "seal on the cowl" to "seal on the ramps". I remember asking Van's which way to go (wayyyy back when...) and they said either way will work. I also extended the lower cowl seal way up the sides. They didn't even go out past the "curve". Now everything looks like yours. I don't have a lot of time on the mod but it looks like CHT's 10-12 degrees lower and oil temp 5-10.
__________________
Mike Hilger
RV-6 N207AM w/G3X, 1,800 hours +
South St. Paul, MN (KSGS)
A&P, EAA Tech Counselor

We're all here because we're not all there...
Reply With Quote
  #44  
Old 10-27-2016, 11:31 AM
Marc Bourget Marc Bourget is offline
 
Join Date: Apr 2009
Location: Stockton, California
Posts: 338
Default

Quote:
Originally Posted by AlexPeterson View Post
Marc, yes, based on speed, temp, altitude, etc., it was very nearly full recovery. The data is probably in a stack of stuff in a safe place... It might even be somewhere in these forums, but I don't recall.
Alex, I am very interested in the data, but it's not something I need right now.

I understand from Zavatson that 60% is pretty good, but "very nearly full" would seem to be greater.

Next, where can I view photos of your efforts?

TIA

mjb
Reply With Quote
  #45  
Old 10-27-2016, 03:11 PM
f14av8r's Avatar
f14av8r f14av8r is offline
 
Join Date: Apr 2012
Location: Tampa (Wimauma actually)
Posts: 451
Default Big Curves

Hi Guys,
I have a question. I'm reworking my seals and need some advice. What size material should I use when working the curvy sections around the spinner and the back of baffled area. Should I just bend the **** out of 3" wide material or should I be using something wider?
__________________
Randy King
Tampa (Wimauma), Florida
RV-4 N212CS (sold)
RV-8 N184RK (sold)
Currently flying a Pitts S-2E

Exempt and gladly donating anyway - Current through March 2025
Reply With Quote
  #46  
Old 10-27-2016, 08:23 PM
crabandy crabandy is offline
 
Join Date: Jan 2010
Location: Ottawa, Ks
Posts: 2,309
Default

Quote:
Originally Posted by f14av8r View Post
Hi Guys,
I have a question. I'm reworking my seals and need some advice. What size material should I use when working the curvy sections around the spinner and the back of baffled area. Should I just bend the **** out of 3" wide material or should I be using something wider?
I wish I would've used a larger 1 piece around the curvy sections, instead I ended up using lots of short sections like most do to conform to the curves but leak at the overlaps.
Next time I would use a sheet of cheap vinyl or similar to mimic the baffle seal as I cut/trimmed and pieced together a pattern to make a 1 piece seal. The resulting pattern will tell you what size material you need. In the end I think it's faster and easier to make a 1 piece pattern to cut a finished piece of baffling than to fit lots of little pieces, not to mention a better seal. Just a theory but an easy one to try.....
__________________
RV 7 500 hours and counting
20 donation done
Reply With Quote
  #47  
Old 01-18-2017, 03:16 PM
Dreamin9 Dreamin9 is offline
 
Join Date: Aug 2016
Location: Near Buffalo, NY
Posts: 71
Default

From reviewing this thread it would appear my front/middle baffle seal is pointing the wrong way. It's edge is tucked under(behind) the wrap around portion of the top cowl. I thought maybe the pressure inside would be higher than the pressure behind the gear and keep the seal tight?

Or, does this seal need to be angled backwards for better seal? If so, does the seal where it curves backward need to be redone?

PS This RV-9A is new to me and runs hot.

Hope the picture compensates for my poor description.



Looks like I haven't figure out picture posting, maybe the following will help.

http://tinypic.com/m/jike8x/3

Last edited by Dreamin9 : 01-18-2017 at 03:19 PM. Reason: picture didn't show
Reply With Quote
  #48  
Old 01-18-2017, 03:42 PM
YellowJacket RV9 YellowJacket RV9 is offline
 
Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,330
Default

Definitely should be the other way around. I'm guessing if you reverse them it will help with your cooling issues, but would also guess that there may be other baffling problems too. Worth going over and making sure every possible place is sealed.

Chris
__________________
Chris Johnson
RV-9A - Done(ish) 4/5/16! Flying 4/7/16
Reply With Quote
  #49  
Old 01-18-2017, 08:51 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,320
Default

Quote:
Originally Posted by Dreamin9 View Post
Hope the picture compensates for my poor description.



Looks like I haven't figure out picture posting, maybe the following will help.

http://tinypic.com/m/jike8x/3
__________________
Bill

RV-7
Reply With Quote
  #50  
Old 01-18-2017, 09:11 PM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 10,348
Default

Quote:
Originally Posted by Dreamin9 View Post
From reviewing this thread it would appear my front/middle baffle seal is pointing the wrong way.
Yep, bass ackwards for sure.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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 05:51 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.