VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics

  #11  
Old 01-01-2019, 02:27 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 1,211
Default

What is dimension of "designed opening"? Are you able to lay down and stick your head/arms/shoulders through the opening?

Maybe someone can show a pic of the entire bulkhead with the opening...
__________________
-
Jim Stricker
Hinckley, Ohio
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 406

LSRM-A Certificate 2016
Special Thanks to EJ Trucks
Reply With Quote
  #12  
Old 01-01-2019, 02:46 PM
Tony_T's Avatar
Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,238
Default

Quote:
Originally Posted by Piper J3 View Post
What is dimension of "designed opening"? Are you able to lay down and stick your head/arms/shoulders through the opening?

Maybe someone can show a pic of the entire bulkhead with the opening...
Section 10 shows the access opening in the bottom skin.



As I said, you could get one hand through the opening.
__________________
Tony
RV-12 #202 -- Flying

Last edited by Tony_T : 01-01-2019 at 02:53 PM.
Reply With Quote
  #13  
Old 01-01-2019, 02:51 PM
Tony_T's Avatar
Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,238
Default

Quote:
Originally Posted by rvbuilder2002 View Post
I'm not sure what you mean by "get to all of this". Everything you see can be reached through the designed opening. For those that want to stand behind the pumps when working on them, you will have to remove the tail cone I guess.....

The only item that needs to be removed during inspections is the black Andair prefilter.

The silver Rotax filter (up near the top) gets changed initially at 100 hrs and then 200 hr intervals after that. It would be difficult to change working through the bottom access hole, so that is best done through the baggage bulkhead opening.
I am not a young guy anymore but I have had no problem accessing it that way. In our shop we have a piece of plywood that fits the baggage floor. Because of the different fuel tank design, with the seats removed, it is possible to climb into the baggage area and sit on the baggage floor while accessing the fuel pump assembly (may require a tail stand to prevent he fuselage tilting onto the tail).
OK, thanks, questions answered. I think they were pertinent questions; ease of maintenance is a valid concern.
__________________
Tony
RV-12 #202 -- Flying
Reply With Quote
  #14  
Old 01-01-2019, 03:26 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 1,211
Default

Quote:
Originally Posted by Tony_T View Post
Section 10 shows the access opening in the bottom skin. As I said, you could get one hand through the opening.
No, I mean the "Designed Opening" in the baggage bulkhead. Can you lay down in the baggage compartment and stick your head/arms/shoulders thru the opening so you can see and work on the plumbing?
__________________
-
Jim Stricker
Hinckley, Ohio
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 406

LSRM-A Certificate 2016
Special Thanks to EJ Trucks
Reply With Quote
  #15  
Old 01-01-2019, 03:38 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 1,211
Default

Another question… with all those hose clamps… wouldn’t it be a good idea to safety wire so they don’t loosen?





__________________
-
Jim Stricker
Hinckley, Ohio
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 406

LSRM-A Certificate 2016
Special Thanks to EJ Trucks
Reply With Quote
  #16  
Old 01-01-2019, 03:38 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,958
Default

Quote:
Originally Posted by Piper J3 View Post
No, I mean the "Designed Opening" in the baggage bulkhead. Can you lay down in the baggage compartment and stick your head/arms/shoulders thru the opening so you can see and work on the plumbing?
It is the same as the ULS RV-12
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #17  
Old 01-01-2019, 03:45 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,958
Default

Quote:
Originally Posted by Piper J3 View Post
Another questionÖ with all those hose clampsÖ wouldnít it be a good idea to safety wire so they donít loosen?





In all my years working on aircraft professionally, I have never seen a screw type hose clamp loosen, so I am not sure how to answer that question.

Some would say why not? I guess my answer would then be, if it makes you feel better, then safety wire them, but that line of thinking would also make ever using a self locking nut a bad choice.

Bottom line.... use of safety wire is not deemed necessary so it is not specified in the KAI, but if it makes someone feel better, there is nothing wrong with doing it.
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #18  
Old 01-02-2019, 08:03 AM
Azjulian Azjulian is offline
 
Join Date: Dec 2015
Location: Scottsdale, Arizona
Posts: 142
Default

Thanks for posting those pictures I was curious about the size of the pumps etc for the injection engine.

Great job on the lines that looks super clean !

Iím not sure why the negative comments because that looks very simple to me considering you have two pumps and itís all in one place to inspect, thatís a great design.
Reply With Quote
  #19  
Old 01-02-2019, 09:03 AM
Mark33 Mark33 is offline
 
Join Date: May 2010
Location: Baton Rouge, La.
Posts: 472
Default

Iím not a 12 builder, but that sure looks like a lot of plumbing. Why wouldnít you guys use a duel fuel pump setup from SDS or EFII? The way the fuel pumps are mounted in their manifold would really clean things up for you guys. Walbro fuel pumps along with an SDS or EFII duel fuel pump manifold and simple pre and post pump Holly reusable filters would surely clean all of that plumbing up. Iím installing an electronic fuel injection setup with a duplex fuel selector valve with return lines on my -7 build and Iím using the SDS/EFII fuel pump/manifold and it really works well and simplifies things.

Mark
Reply With Quote
  #20  
Old 01-02-2019, 09:54 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,958
Default

Quote:
Originally Posted by Mark33 View Post
Iím not a 12 builder, but that sure looks like a lot of plumbing. Why wouldnít you guys use a duel fuel pump setup from SDS or EFII? The way the fuel pumps are mounted in their manifold would really clean things up for you guys. Walbro fuel pumps along with an SDS or EFII duel fuel pump manifold and simple pre and post pump Holly reusable filters would surely clean all of that plumbing up. Iím installing an electronic fuel injection setup with a duplex fuel selector valve with return lines on my -7 build and Iím using the SDS/EFII fuel pump/manifold and it really works well and simplifies things.

Mark
The RV-12 and 12iS are certified airplanes. The Rotax 912iS is a certified engine package.

The parts and all of the associated plumbing you see in the photo is either specified for and supplied with the engine by Rotax or is designed to meet a long list (many pages) of engineering requirements for the engine installation.

Bottom line.... Eyeball engineering is not allowed in this situation, and knowing the complexity of the 912iS engine, even if it was it would not be a good idea.
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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 06:19 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.