Re: KR> Carburetor throttle cable screws and how are other guys securing it
If you use flexible hose from the hard fuel line to engine etc. 1) ask for "Fuel injection" type fuel hose. (Stronger ,better, etc) 2) use a tubing flaring tool. And a little ways from the end "swedge a slight bulge to help prevent the hose from sliding off.When using a tubing flaring tool, position the proper sized die as if you were going to form a double walled 45° flare. Stop when the proper sized bulge first appears around the circumference. Clean up where the tool grabbed the pipe with a fine tooth file and your fineshed. You tube shows the process nicely. Good luck and i hop this helps.Regards, Bill Jacobs, Daytona Beach Florida ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Carburetor throttle cable screws and how are other guys securing it
You may also want to check high performance auto sources for methanol rated braided stainless steel reinforced fuel lines with AN fittings. If it works on pro-stock and top fuel cars (nitro methane) with their associated vibration and stress, it will probably work on your KR. A typical set up is rigid up the firewall with a fitting similar to the first link that Larry posted, followed by braided SS with a loop to allow for motion while minimizing flex issues at each end of the hose. Mark W. N952MW >-- Larry Flessner wrote: These of correct size are good for fuel line. http://www.aircraftspruce.com/catalog/appages/ms21919clamps.php?clickkey=3764 The flex hose from gascolator to carb should be mostly self supporting to allow for movement. https://www.dropbox.com/s/r0tppoor96tl9yz/IMG_9046.JPG?dl=0 See what length you need and go to a local race shop.. ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Carburetor throttle cable screws and how are other guys securing it
On 7/30/2018 6:22 PM, Jeff York via KRnet wrote: I am just curious about better clamps and or line that some may have used. In small 1/4 inch hose clamps a lot of what the auto parts stores sell is pretty low quality. These of correct size are good for fuel line. http://www.aircraftspruce.com/catalog/appages/ms21919clamps.php?clickkey=3764 The flex hose from gascolator to carb should be mostly self supporting to allow for movement. https://www.dropbox.com/s/r0tppoor96tl9yz/IMG_9046.JPG?dl=0 See what length you need and go to a local race shop and have them make you one. Make sure to get the correct angle flare fittings and the metal sleeve hose would be nice. Cover it with fire-sleeve also. Make sure it is alcohol resistant if using auto fuel with alcohol. Larry Flesner ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Carburetor throttle cable screws and how are other guys securing it
thanks Larry, I have my aluminum hard lines still in good shape. I am looking at specifically the soft line required for running to the carb from the gascolator. Because of engine movement, it of course needs to be flexible. Whatever that blue line was that I used the last time, I will not use it again. I am most likely going to use standard 1/4 inch automotive fuel line. I am just curious about better clamps and or line that some may have used. In small 1/4 inch hose clamps a lot of what the auto parts stores sell is pretty low quality. I have had them fail on cars and not to interested in having one fail in the air. Just really looking to do it the best way, not just the easy or cheap way. Jeff York On Mon, Jul 30, 2018 at 6:42 PM, Flesner via KRnet wrote: > > Jeff, > > Good to hear you're getting back in to flying shape. See you at the > Gathering? > > I can't help with the carb cable safety as I run a Marvel-Schebler on the > 0-200. As for fuel lines I use 3/8" aluminum from tank to gascolator and > flex hose from there to the carb. Many types of plastic(?)/ rubber/ > flexable line are used in experimentals but aluminum would be the most > durable, in my opinion, and is used in "certified-factory built aircraft". > Basically, any hold down that secures the line from movement or vibration > and does not itself chafe or damage the line is satisfactory. It's not > rocket science. I used mostly rubber padded "Adel" clamps where possible. > Some plastic clamps go brittle with age. Do not route electrical lines > along or tied to fuel lines. Some builders use a short section of hose > with clamps for line connections but I used flair fittings throughout. > Consider the "failure mode" at each point and do your best to eliminate > it. Go with best practice where possible. I've not had to touch my fuel > system in 14 years and 680 hours so I must have done something right. > > > Larry Flesner > > > ___ > Search the KRnet Archives at https://www.mail-archive.com/k > r...@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Carburetor throttle cable screws and how are other guys securing it
Jeff, Good to hear you're getting back in to flying shape. See you at the Gathering? I can't help with the carb cable safety as I run a Marvel-Schebler on the 0-200. As for fuel lines I use 3/8" aluminum from tank to gascolator and flex hose from there to the carb. Many types of plastic(?)/ rubber/ flexable line are used in experimentals but aluminum would be the most durable, in my opinion, and is used in "certified-factory built aircraft". Basically, any hold down that secures the line from movement or vibration and does not itself chafe or damage the line is satisfactory. It's not rocket science. I used mostly rubber padded "Adel" clamps where possible. Some plastic clamps go brittle with age. Do not route electrical lines along or tied to fuel lines. Some builders use a short section of hose with clamps for line connections but I used flair fittings throughout. Consider the "failure mode" at each point and do your best to eliminate it. Go with best practice where possible. I've not had to touch my fuel system in 14 years and 680 hours so I must have done something right. Larry Flesner ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Carburetor throttle cable screws and how are other guys securing it
Hey KR folks, As I have been recovering from foot injuries for more then 5 years and getting in a place to get my KR back to flight status, I have been reviewing things like throttle cable securing screw, the choke securing screws and a few other items that dont have a simple ability to secure with aircraft safety wire. I have the typical Zenith updraft 12992 Carb on a Great Plains 2180 VW conversion. I am also curious about fuel line and securing it as I am going through my entire fuel system since my plane has been idle for a few years. After finding contamination in my gascolator and ugly deterioration in my fuel line from the gascolator to the carb, I also decided to go through my carb and rebuild it. After taking the fuel bowl off, I found that the gascoator filter kept anything from contaminating the carb, since I pulled the bowl off and needed new gaskets, it made sense to rebuild it anyway. This brings me to my question of fuel line and what type everyone is using. I had this blue line I think I got from aircraft spruce and it was in terrible shape. In fact, it crumbled when I touched it. So, is everyone just using lock tite on the throttle cable securing screws ? Are you using any specific fuel line ? Are you using any specific type or style of fuel line hose clamps ? I apologize if my questions seem very newbie but, after seeing the contamination and fuel line condition, it has made me think about how I probably didn't do it exactly right the first time and how I should do it better. Especially considering how important fuel is to flight. I have been perusing photos on the KRnet but have not run across anything with good enough details. Sorry again if this seems elementary but, fuel starvation, fuel leaking or fuel contamination is the last thing any of us need and our aircraft. Jeff York KR2 ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
