Converting EDF to turbines - Page 44 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 01-13-2021, 01:17 PM   #431
Wingnutz
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Re: Converting EDF to turbines


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Quote:
Originally Posted by Angus View Post
Looks like it is a non-ideal fill point, looks like some old tubing found in a scrap box. A weak set up even for a test stand. Too many joints should be a bit cleaner of an install. Will it work? probably, could you have a air leak causing a flame out? possibly.

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Quote:
Originally Posted by EricD View Post
Looks like the tank filler. There is no shut off valve in the system. If a fuel solenoid is leaky it could fill the turbine with fuel when re-fueling.
Thanks guys
Take it there might be better ways to “plumb” my X-45, especially tank to pump.
Can either of you outline a better way or direct me to a photo or instructions of a good X-45 “plumb”?
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Old 01-13-2021, 04:12 PM   #432
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Re: Converting EDF to turbines

A shutoff valve should be between the fill point and turbine pump so no movement of fuel into the turbine when refueling plus no residual pumped into the turbine when shutdown . In either case ; a good chance of a hot start on the next run which you don’t want especially in a foamie !
Here are couple of Festo valve holders I get made up. The new version on the left screws down with a couple of #2 screws .
https://www.rccanada.ca/rccforum/sho...ighlight=Festo
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Old 01-14-2021, 11:48 AM   #433
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Re: Converting EDF to turbines

Quote:
Originally Posted by stegl View Post
A shutoff valve should be between the fill point and turbine pump so no movement of fuel into the turbine when refueling plus no residual pumped into the turbine when shutdown . In either case ; a good chance of a hot start on the next run which you don’t want especially in a foamie !
Here are couple of Festo valve holders I get made up. The new version on the left screws down with a couple of #2 screws .
https://www.rccanada.ca/rccforum/sho...ighlight=Festo
I’ve ordered the festo ball valve shut-offs and holders and will hook up fuel to myX-45 on test bed once the parts arrive.
Below is a fuel flow diagram I plan to follow...
Question: if I hook up as per the diagram, do I plug the fill port or leave it unplugged as a vent?
Is there a better way?
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Old 01-14-2021, 02:01 PM   #434
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Re: Converting EDF to turbines

The guys on the X-icoy thread on RCGroups recommended below.
Better?
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Old 01-14-2021, 03:10 PM   #435
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Yes, the tank needs to be vented while filling or running. If you decide to use an air trap, place the trap between the tank and the valve, move your fill line to the trap.
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Old Today, 08:12 PM   #436
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Is there a downside to an airtrap?

A couple of posts in this thread advocate NOT using an airtrap/ header tank/UAT (am I correct in concluding these all perform the same function?) between the tank and turbine. The instructions with my Xicoy urge the use of a second tank to trap bubbles...
“A bubble-trap type hopper tank system is highly recommended“ (p.15).
1. Beyond space and the added potential for leaks, is there a downside to using a bubble/header/UAT/ tank?
2. The brass tubing supplied with the HAB conversion kit is 5/32” or 6mm od and there’s no way 4mm poly tubing is going on there. Is there a safe, simple way to make the change?
I have received my 4mm festo ball valve...would a shutoff with 6mm one end, 4mm the other end work?
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