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.


Go Back   VAF Forums > Model Specific > RV-7/7A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 02-27-2021, 03:08 PM
Draker's Avatar
Draker Draker is offline
 
Join Date: Jun 2016
Location: Livermore, CA
Posts: 487
Default Purpose of tricycle gear cowl hole + metal closeout?

Trying to better understand the purpose of this piece, from the tri-gear kit:



Vans has you cut an enormous hole in the cowl for the nose gear, then for some reason close most of it off with a metal plate. Any clue as to the purpose of this? Obviously you need a small hole for the nose gear, and to make it a little large to allow for removal of the lower cowl, but the gear doesn't go that far forward. Why would Vans call out a hole "Approx 15.5 inches" long, particularly when you just cover most of it up with a metal plate?
__________________
Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/31/2020
RV-7A (N12VD): Empennage and wing kits complete minus fiberglass. Fuselage, wiring, and canopy complete. IO-360-M1B mounted. Cowl, baffles, induction mostly done.
Reply With Quote
  #2  
Old 02-27-2021, 03:14 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 7,356
Default

When you remove the lower cowl with the prop installed, the prop spinner will prevent any significant forward movement of the cowl, so you need that long slot to clear the nose strut as you lower the cowl straight down for 7Ē or so. The screwed in Ďcoverí helps restore the strength of the cut out.
Reply With Quote
  #3  
Old 02-27-2021, 03:15 PM
bjdecker's Avatar
bjdecker bjdecker is offline
 
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 636
Default

Quote:
Originally Posted by Draker View Post
Trying to better understand the purpose of this piece, from the tri-gear kit:



Vans has you cut an enormous hole in the cowl for the nose gear, then for some reason close most of it off with a metal plate. Any clue as to the purpose of this? Obviously you need a small hole for the nose gear, and to make it a little large to allow for removal of the lower cowl, but the gear doesn't go that far forward. Why would Vans call out a hole "Approx 15.5 inches" long, particularly when you just cover most of it up with a metal plate?

So you can get the bottom cowl off?
__________________
Brian Decker
Retired Firmware Guy and Airplane Builder

2020 RV-14 QB -- Under construction - Tailcone & Empennage Complete.
2018 RV-7 QB -- Built, Flying
2007 RV-7 QB -- Built, Drowned, Resurrected and flying
1998 RV-8 QB -- Started, Sold
1986 Mooney 205SE
1980 Mooney 231

Aided and abetted building a number of other RV's.
Reply With Quote
  #4  
Old 02-27-2021, 03:15 PM
Fred.Stucklen's Avatar
Fred.Stucklen Fred.Stucklen is offline
 
Join Date: Oct 2006
Location: Brooksville, FL
Posts: 407
Default Front Gear leg cowl hole

Having the gear leg hole that long allows you to more easily take the cowl off, especially if you have a three bladed prop.... Once you put the cowl back in place, the plates are used to cover up the hole for better air flow through the cowl, and enhance engine cooling.


Quote:
Originally Posted by Draker View Post
Trying to better understand the purpose of this piece, from the tri-gear kit:



Vans has you cut an enormous hole in the cowl for the nose gear, then for some reason close most of it off with a metal plate. Any clue as to the purpose of this? Obviously you need a small hole for the nose gear, and to make it a little large to allow for removal of the lower cowl, but the gear doesn't go that far forward. Why would Vans call out a hole "Approx 15.5 inches" long, particularly when you just cover most of it up with a metal plate?
__________________
Fred Stucklen
wstucklen1@cox.net
RV-7A N924RV Flying (1870 Hrs & counting)
RV-6A N926RV 875 Hrs (Sold)
RV-6A N925RV 2008 Hrs (Sold)

2021 Contribution done
Reply With Quote
  #5  
Old 02-27-2021, 04:15 PM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Southwest
Posts: 1,417
Default 3 blade prop

I was hesitant of getting a 3 bladed propr because of the pain getting the cowl off. With this new configuration, is removing the cowl with a 3 bladed propr easier now?
__________________
John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

Dues paid 2021, worth every penny

RV9A- Status:
Tail 98% done
Wings 98% done
Fuselage Kit 98% done
Finishing Kit 35% canopy done for now
Electrical 85% in work
Firewall Forward 5% in work
Fiberglass 0%, thought i was building in metal?
www.pilotjohnsrv9.blogspot.com
Reply With Quote
  #6  
Old 02-27-2021, 04:20 PM
Draker's Avatar
Draker Draker is offline
 
Join Date: Jun 2016
Location: Livermore, CA
Posts: 487
Default

Ahh this all makes sense. So far Iíve only taken the lower cowl off without the spinner present, which is easy. It makes sense that Iíd have to drop it down with the spinner on, and that much hole makes it possible.
__________________
Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/31/2020
RV-7A (N12VD): Empennage and wing kits complete minus fiberglass. Fuselage, wiring, and canopy complete. IO-360-M1B mounted. Cowl, baffles, induction mostly done.
Reply With Quote
  #7  
Old 02-27-2021, 06:13 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 7,356
Default

In case it wasnít clear, this slot extension is an upgrade to the original plans, based on what many builders ended up doing off-plan.
Reply With Quote
  #8  
Old 02-28-2021, 10:41 AM
rightrudder rightrudder is offline
 
Join Date: Mar 2014
Location: Laguna Hills, CA
Posts: 1,846
Default

Quote:
Originally Posted by Draker View Post
Ahh this all makes sense. So far Iíve only taken the lower cowl off without the spinner present, which is easy. It makes sense that Iíd have to drop it down with the spinner on, and that much hole makes it possible.
When you complete the lower cowling and it's painted, you might want to apply some clear 3M Stone Guard film to the semicircle in back of the spinner. The paint is easily chipped here during cowling removal/installation and this will help a lot.
__________________
Doug
RV-9A "slider"
Flew to Osh in 2017, 2018 & 2019!
Tail number N427DK
Donation made for 2021
You haven't seen a tree until you've seen its shadow from the sky -- Amelia Earhart
Reply With Quote
  #9  
Old 03-01-2021, 02:03 PM
Raymo's Avatar
Raymo Raymo is offline
 
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,324
Default

This is a new addition to the plans since I built in 2015-2017 that I will be incorporating prior to paint. My cowls is very difficult to remove (3 blade Catto).

I also purchased some neoprene knee supports to cover the lower 2 blades for protection.
__________________
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)
Reply With Quote
  #10  
Old 03-01-2021, 02:31 PM
ty1295 ty1295 is offline
 
Join Date: Aug 2011
Location: Jeffersonville, IN
Posts: 454
Default

Quote:
Originally Posted by PilotjohnS View Post
I was hesitant of getting a 3 bladed propr because of the pain getting the cowl off. With this new configuration, is removing the cowl with a 3 bladed prop easier now?
I have a 3 blade, and once you increase the slot length it isn't really a big issue. I did make some socks to go over the prop blade if I need to do it by myself, with help you can avoid those even.
__________________
Jeff Scott
RV9A First Flight 9/30/19
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 06:13 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.