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Fuel system questions

Old 05-30-2021, 01:27 AM
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jerrybern
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Default Fuel system questions

Hello, I have posted in the past about festo fittings, I have the fittings I need.They are 4 mm tubing, my question is How do I hook up tygon fuel tubing to these fittings?The gas start is a no brainer, however the liquid fuel is the problem, what size tygon do I use? The turbine is a older Jet Central Rhino
thanka, Till next Time
Jerry B
Old 05-30-2021, 01:58 AM
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Dansy
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Festo fitting…guessing your talking about the quick, tygon doesn’t work with those, use either barb or Festo line available in different sizes
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Old 05-30-2021, 03:55 AM
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Len Todd
 
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I use a barbed fitting to connect the festo type fuel line to the tygon fuel line. Then the festo type fuel line goes into a festo fitting. Depending on the size of your tygon fuel line, you may need an adapter (e.g. 6mm to 4mm). Tygon tubing will not work well when placed directly into a festo fitting.
Old 05-30-2021, 07:47 AM
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jerrybern
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Originally Posted by Len Todd View Post
I use a barbed fitting to connect the festo type fuel line to the tygon fuel line. Then the festo type fuel line goes into a festo fitting. Depending on the size of your tygon fuel line, you may need an adapter (e.g. 6mm to 4mm). Tygon tubing will not work well when placed directly into a festo fitting.
Thank you ,
now what size tygon tubing do a I use,then I need 4 to 6 mm barbs?
Old 05-30-2021, 07:57 AM
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If I recall correctly, use 3/16" tygon and it fits on a 6mm barbed fitting.

Smaller O.D. tygon may fit on a 4mm x 4mm barbed fitting.

Also, I wire tie all connections to barbed fittings.
Old 05-30-2021, 08:03 AM
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jerrybern
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Originally Posted by Len Todd View Post
If I recall correctly, use 3/16" tygon and it fits on a 6mm barbed fitting.

Smaller O.D. tygon may fit on a 4mm x 4mm barbed fitting.

Also, I wire tie all connections to barbed fittings.
I have been looking on a few sites since your reply, I am still somewhat confused, the ones on Aeropanda are metal and they plug into the festo fitting? and the tygon goes over the barb end. Do I understand this correctly?
thanks
Jerry B
Old 05-30-2021, 08:17 AM
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Len Todd
 
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Take a look at this fitting. Festo 6mm – 4mm connector – Dreamworks Model Products – #1 in Radio Controlled Jets and Accessories (dreamworksrc.com)
Old 05-30-2021, 10:58 AM
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Originally Posted by jerrybern View Post
I have been looking on a few sites since your reply, I am still somewhat confused, the ones on Aeropanda are metal and they plug into the festo fitting? and the tygon goes over the barb end. Do I understand this correctly?
thanks
Jerry B
Tygon into the 6mm side and Festo out of the 4mm side…

https://www.aeropanda.com/collection...tor-8mm-to-6mm
Old 05-30-2021, 11:00 AM
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Originally Posted by jerrybern View Post
I have been looking on a few sites since your reply, I am still somewhat confused, the ones on Aeropanda are metal and they plug into the festo fitting? and the tygon goes over the barb end. Do I understand this correctly?
thanks
Jerry B
Tygon into the 6mm side and Festo out of the 4mm side…

https://www.aeropanda.com/collections/festo/products/festo-barbed-tubing-connector-4mm-to-3mm (It’s actually 6 to 4mm)
Old 05-30-2021, 11:20 AM
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jerrybern
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Originally Posted by Dansy View Post
Tygon into the 6mm side and Festo out of the 4mm side…

https://www.aeropanda.com/collections/festo/products/festo-barbed-tubing-connector-4mm-to-3mm (It’s actually 6 to 4mm)
does the metal barb go directly into the festo or do you use tubing in the festo?
thanks
Jerry B
Old 05-30-2021, 11:23 AM
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Originally Posted by jerrybern View Post
does the metal barb go directly into the festo or do you use tubing in the festo?
thanks
Jerry B
‘Directly into the Festo (either 4 or 6mm) they basically replace the quick one…..or into tygon….
Old 05-30-2021, 12:21 PM
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Originally Posted by jerrybern View Post
does the metal barb go directly into the festo or do you use tubing in the festo?
thanks
Jerry B
FESTO is the name of the company that makes the two types of fittings. One fitting is the quick connect type and the other is the double barb type. The quick connect type uses the "festo" type of fuel line and the barbed type can use that and/or Tygon. The double barbed fittings suggested above can be used to connect the two types of fuel line.
Old 05-30-2021, 12:28 PM
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Originally Posted by causeitflies View Post
FESTO is the name of the company that makes the two types of fittings. One fitting is the quick connect type and the other is the double barb type. The quick connect type uses the "festo" type of fuel line and the barbed type can use that and/or Tygon. The double barbed fittings suggested above can be used to connect the two types of fuel line.
iI guess I'm not understanding it, on my fuel solenoid there is a 4mm festo fitting ,. I understand that tje barb is reducing the diameter of the tygon. Do you use a piece of tubing in the festo and that connects to the barb or does the barb plug into the fitting directly? Sorry about all of the questions.
Old 05-30-2021, 12:31 PM
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The barb does not go into the quick connect. Only tubing goes on the barb and only hard tubing goes into the quick connect. So yes, a piece of tubing goes into the quick fitting and then to the barb.

Last edited by causeitflies; 05-30-2021 at 12:33 PM.
Old 05-30-2021, 01:32 PM
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Zeeb
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Originally Posted by Len Todd View Post
If I recall correctly, use 3/16" tygon and it fits on a 6mm barbed fitting.

Smaller O.D. tygon may fit on a 4mm x 4mm barbed fitting.

Also, I wire tie all connections to barbed fittings.
Rather than wire ties on Turbine fuel systems, might I suggest that double wrapped Safety wire might be a better option?
Old 05-30-2021, 01:40 PM
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Originally Posted by jerrybern View Post
iI guess I'm not understanding it, on my fuel solenoid there is a 4mm festo fitting ,. I understand that tje barb is reducing the diameter of the tygon. Do you use a piece of tubing in the festo and that connects to the barb or does the barb plug into the fitting directly? Sorry about all of the questions.
What turbine? To and from the valve would normally be 4mm od (2.5mm I’d) Clear SMC tube rather than Festo. This presumes the pump has 4mm out and turbine 4mm in.


Old 05-30-2021, 01:53 PM
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No wire ties, and no Tygon unless you want headaches and problems, and possibly a ruined airplane/equipment.

Festo fuel line and safety wire in place of wire ties.
Old 05-30-2021, 02:32 PM
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jerrybern
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Originally Posted by Dave Wilshere View Post
What turbine? To and from the valve would normally be 4mm od (2.5mm I’d) Clear SMC tube rather than Festo. This presumes the pump has 4mm out and turbine 4mm in.
I have a older Jet Central Rhino, gas start
Old 05-30-2021, 09:03 PM
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OK, so what is the plumbing order for you to need the step down around the valve?
Old 05-30-2021, 09:31 PM
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jerrybern
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Originally Posted by Dave Wilshere View Post
OK, so what is the plumbing order for you to need the step down around the valve?
Here is what ai have







Here is what I have Thanks Jerry B
Old 05-30-2021, 10:35 PM
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Using a hopper tank? You just need to step between the last tank and fuel pump. Everything else is 4mm SMC tube

Dave
Old 05-31-2021, 04:45 AM
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jerrybern
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Originally Posted by Dave Wilshere View Post
Using a hopper tank? You just need to step between the last tank and fuel pump. Everything else is 4mm SMC tube

Dave
Thanks, David
I ordered a VAT from Chief Aircraft,Now What is SMC tubing? Please forgive all of my questions, this is my first Turbine and there are not my turbine flyers at our local field.
I plan on going to a few jet events this summer just to see there set ups
Old 05-31-2021, 05:21 AM
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SMC is just another brand. They sell similar products to festo but seem to be a bit cheaper (well here in Australia anyway).
Old 05-31-2021, 06:49 AM
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Yes, different brand, harder tube, usually clear.
Old 06-01-2021, 04:48 AM
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We sell specialized fuel tubing for the UAV industry:

https://www.ultimate-jets.net/collec...ct-fuel-tubing

This is directly compatible with with push-to-connect Pisco fittings:
https://www.ultimate-jets.net/collections/fuel-hardware

Even on the suction side of the pump. This makes plumbing a lot easier.
Check this article out:

https://www.ultimate-jets.net/blogs/...nnect-fittings

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