| Thorp Air Command - T18.net http://t18.net/thorpforum/ |
|
| Is this fuel line routing safe? http://t18.net/thorpforum/viewtopic.php?f=19&t=7235 |
Page 1 of 1 |
| Author: | Ryan Allen [ Sun Mar 03, 2013 5:45 pm ] | ||
| Post subject: | Is this fuel line routing safe? | ||
I now have a fuel pump on my engine and the gascolator is in the same location as before (at about the cross bar on the landing gear). I have attached a photo for reference. The angle from the gascolator to the fuel pump seems excessive. Its about a 51 angle to be exact. Is this safe, normal, etc?
|
|||
| Author: | Rich Brazell [ Sun Mar 03, 2013 11:15 pm ] |
| Post subject: | Re: Is this fuel line routing safe? |
Hard too tell with the living room barko lounger in the way !  I assume you are going to use SS fuel line vs the "Cheech and Chong" rubber hose ? "I can not sign thee papars as you have broken all my fingers !"  With the appropriate Aeroquip fittings (multiple angles) you should be able to keep the hose bending/angles to a minimum .  RB 
|
|
| Author: | Ryan Allen [ Mon Mar 04, 2013 7:55 am ] |
| Post subject: | Re: Is this fuel line routing safe? |
Dang, you sound like my wife, always giving me grief about my lounger! She's been wanting to throw that thing out since I brought it home. The current hoses are just water hose lines cut to length. I plan to order the appropriate pre-made hoses once I get the correct lengths. I am just concerned about how steep the fuel has to travel from the firewall to the fuel pump (the hose that I am holding in the picture). |
|
| Author: | dan [ Mon Mar 04, 2013 8:21 am ] |
| Post subject: | Re: Is this fuel line routing safe? |
You going to run a backup pump arent you Ryan? It would appear that the only time that might give you a little trouble is if that pump gave up. I dont run a fuel pump so Rich and those that use them would know more about it than I.......Dan |
|
| Author: | Pacer 20 [ Mon Mar 04, 2013 10:36 am ] |
| Post subject: | Re: Is this fuel line routing safe? |
I dont want to restart a discution but the design is a gravity feed system. So no fuel pump needed. For my part I have the same fuel pump on my engine, a electric fuel pump too and when is the time I removed all this extra stuff. If I dont need it, I dont want it! My 2 cents! |
|
| Author: | Fraser MacPhee [ Mon Mar 04, 2013 10:49 am ] |
| Post subject: | Re: Is this fuel line routing safe? |
If I had a fuel system that would benefit from, or necessitated a fuel pump, I would have it. So far, neither T-18 I have owned has had one, and neither has ever exhibited a characteristic that gave me pause to think of installing one. I'm a good KISSer. (Tierry - means Keep It Simple Stupid) Ryan - my lounger, having drawn the ire of my wife for several years, graces Homey's and my hangar better than Ethan Allen could ever hope. |
|
| Author: | Ryan Allen [ Mon Mar 04, 2013 1:09 pm ] |
| Post subject: | Re: Is this fuel line routing safe? |
I do have an electric fuel pump on the firewall that feeds that uphill run of fuel line. I will be curious to see what my fuel rate tests come out to be with this setup. I hope it passes because the only other thing to do is raise the level of where the fuel line passes through the firewall. |
|
| Author: | Rich Brazell [ Mon Mar 04, 2013 5:42 pm ] |
| Post subject: | Re: Is this fuel line routing safe? |
I have my fuel pressure sender on the oulet port of the mechanical pump . With the Facet pump on (engine off) I get about 4-6 psi on the gauge . No real difference with the engine running . I turn the Facet pump off after T/O (turn it back on for landing) and still get 5-6 psi from the engine pump . As a side note when I was having carb problems I disconnected the fuel line to the carb and with the fuel valve on (no boost pump on) I was getting an amazing amount of gravity flow thru the Facet pump and the engine driven pump (check valves) ! I think we have beat to death the gravity flow vs pump issue . I just like having positive pressure" to the carb . BOOM ! I don't think you need to raise the fuel level . RB
|
|
| Author: | Ryan Allen [ Mon Mar 04, 2013 8:14 pm ] |
| Post subject: | Re: Is this fuel line routing safe? |
Thats where I plan to put my fuel pressure sensor so thats a good reference. |
|
| Author: | dan [ Mon Mar 04, 2013 10:53 pm ] |
| Post subject: | Re: Is this fuel line routing safe? |
Bingo!!!! there you go Ryan, Thanks Rich, we have a wealth of info here and I just knew the answer would surface!! This is the premier spot for systems on a Thorp, if you need info on how to,or info on how not to, it's all right here and all one has to do is ask.......Dan |
|
| Author: | leewwalton [ Tue Mar 05, 2013 12:18 pm ] |
| Post subject: | Re: Is this fuel line routing safe? |
In the end the carb is still below the bottom of the fuel tank. You have fuel pumps, don't worry about the routing/angle etc. If you've ever flown a low wing (fuel in wings ... RV for example) their pumps are working a lot harder than in a Thorp. Gravity is gravity, the fuel will end up at the lowest point regardless of routing. We are mostly concerned with routing in a pure gravity feed system to maintain the correct PSI to the carb, again as you have fuel pumps you do not need to be as concerned. |
|
| Author: | Ryan Allen [ Tue Mar 05, 2013 1:52 pm ] |
| Post subject: | Re: Is this fuel line routing safe? |
You are right Dan, this is all good info for me. Seeing as how this is my first foray into the experimental thing, I greatly appreciate all you guys with the "know how" chiming in. |
|
| Page 1 of 1 | All times are UTC - 6 hours [ DST ] |
| Powered by phpBB® Forum Software © phpBB Group https://www.phpbb.com/ |
|