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UAT Installation Orientation
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UAT Installation Orientation
About to install a UAT in my Futura and had a general question for you guys.
I have always installed UATs at 45degrees but it's trickier to install like this. I just wondered how many people simply install them horizontally or vertically? Are there any perceived disadvantages to doing so?
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Cheers,
Mark
I have always installed UATs at 45degrees but it's trickier to install like this. I just wondered how many people simply install them horizontally or vertically? Are there any perceived disadvantages to doing so?
Vote away above and comment away below
Cheers,
Mark
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RE: UAT Installation Orientation
it's vertical in my bobcat with no problems and 45 deg in everything else i've had. Have you seen the new baby bottle version Ali is selling?
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RE: UAT Installation Orientation
Dunc, is it easier to see an air pocket when at 45 degrees than upright? The bubble collects nicely right in the corner that is most visible when at 45deg (if you know what I mean).
Yeah, they're the PST ones - I asked him to get hold of one for me for my Tommy Hawk to avoid the 200 potentially collapsing a non rigid UAT.
Again, this is a 160 install and I've had no issues in any of my installs in the past with this size turbine. I will err on the side of caution with the 200SX Tommy Hawk and go 3/16" bore tygon throughout and rigid UAT.
M
Yeah, they're the PST ones - I asked him to get hold of one for me for my Tommy Hawk to avoid the 200 potentially collapsing a non rigid UAT.
Again, this is a 160 install and I've had no issues in any of my installs in the past with this size turbine. I will err on the side of caution with the 200SX Tommy Hawk and go 3/16" bore tygon throughout and rigid UAT.
M
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RE: UAT Installation Orientation
It's easier to see it when it's at 45 deg, the cap kind of hides them when you have it upright. Plus at 45 the bubbles are around the fill and in lines, which has got to be better than having it anywhere near the out for the fuel pump??
Dunc
Dunc
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RE: UAT Installation Orientation
Hi Mark
Heres my opinion. We all know a UAT will work in any orientation because that’s what happens when we fly. The advantage of putting it at 45 is that is purges the air when fuelling. The only other thing to consider is that a vertical half empty UAT will draw air when even a Supersport is at full power so your P-200 has no chance and I guess that restriction in the fuel system will only make this situation worse. A half empty horizontal UAT will not draw air. Of course if you have no air in the UAT there’s no problem.. The big nipple UAT I made really works well especially as none of the fittings, tube or clunk are less that 4mm I.D.
Jason
Heres my opinion. We all know a UAT will work in any orientation because that’s what happens when we fly. The advantage of putting it at 45 is that is purges the air when fuelling. The only other thing to consider is that a vertical half empty UAT will draw air when even a Supersport is at full power so your P-200 has no chance and I guess that restriction in the fuel system will only make this situation worse. A half empty horizontal UAT will not draw air. Of course if you have no air in the UAT there’s no problem.. The big nipple UAT I made really works well especially as none of the fittings, tube or clunk are less that 4mm I.D.
Jason
#9
RE: UAT Installation Orientation
Kero start turbines are so tolerant of air in the lines, I have got rid of mine and use an Orbit clunk this has a bag and felt filter combined, had not problems with my Elan or Rookie no matter what orientation I put them into, just one opinion and on the vote looks like the only one.
Mike
Mike
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RE: UAT Installation Orientation
Mike,
Have you got a link to the clunk?
Also, what do you mean about kero start being tolerant to air in the lines? Not heard this before. I thought air was bad news to any turbine??
M
Have you got a link to the clunk?
Also, what do you mean about kero start being tolerant to air in the lines? Not heard this before. I thought air was bad news to any turbine??
M
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RE: UAT Installation Orientation
Jeremy, the only thing I don't like about that is that you can't see what's going on inside it which is the first thing I want to be able to see on the ground during tests etc
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RE: UAT Installation Orientation
PMSL, someone else told me that a certain make of turbine were tolerant to air in the fuel lines, right after they had crashed a model, i laughed then too (about the air comment, not the crash)
What difference does it make if a turbine is kero start? that would only make a difference in the start sequence surely and not in flight??
What difference does it make if a turbine is kero start? that would only make a difference in the start sequence surely and not in flight??
#14
RE: UAT Installation Orientation
ORIGINAL: DelGatoGrande
its doesnt matter in flight mate.
plane can turn everyway.
it matters only in fueling to take the air out so niple goes to the main tanks must the higher point.
my 2 c
its doesnt matter in flight mate.
plane can turn everyway.
it matters only in fueling to take the air out so niple goes to the main tanks must the higher point.
my 2 c
Here is a pic of a simple box I made to keep mine oriented the correct way Plus its easily removable by removing the rubber band that keeps it in place. It can be glued anywhere and works really well.
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RE: UAT Installation Orientation
I was told that Hawk turbines tolerate bubbles, they just loose a small amount of power should one be 'swallowed', they use significantly less fuel than most other turbines = less fuel per flight = less weight and do not require any form of UAT = less weight + less hassle.
Seems worthy of consideration to me.
marcs
Seems worthy of consideration to me.
marcs
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RE: UAT Installation Orientation
Marc,
I was thinking more of how to mount my UAT than replace my turbine
The Hawk turbines do seem very interesting though as we saw at JetPower.
M
I was thinking more of how to mount my UAT than replace my turbine
The Hawk turbines do seem very interesting though as we saw at JetPower.
M
#17
RE: UAT Installation Orientation
ORIGINAL: marc s
I was told that Hawk turbines tolerate bubbles, they just loose a small amount of power should one be 'swallowed', they use significantly less fuel than most other turbines = less fuel per flight = less weight and do not require any form of UAT = less weight + less hassle.
Seems worthy of consideration to me.
marcs
I was told that Hawk turbines tolerate bubbles, they just loose a small amount of power should one be 'swallowed', they use significantly less fuel than most other turbines = less fuel per flight = less weight and do not require any form of UAT = less weight + less hassle.
Seems worthy of consideration to me.
marcs
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RE: UAT Installation Orientation
Hi Marc
i wasn't refering to the Hawk turbines, i didn't know about them. It was a referance to a semi private joke with Mark
Duncan
i wasn't refering to the Hawk turbines, i didn't know about them. It was a referance to a semi private joke with Mark
Duncan
#19
RE: UAT Installation Orientation
ORIGINAL: schroedm
Mike,
Have you got a link to the clunk?
Also, what do you mean about kero start being tolerant to air in the lines? Not heard this before. I thought air was bad news to any turbine??
M
Mike,
Have you got a link to the clunk?
Also, what do you mean about kero start being tolerant to air in the lines? Not heard this before. I thought air was bad news to any turbine??
M
In my experience Its just that, during the start sequence if you have bubbles in the fuel feed it just seems to eat them without missing a beat, the pump then has no air to pick up as its been purged during the start, not having a UAT you don't have a bubble sitting there waiting to get into the fuel line either, it just seems to be that way, I know the editor of JI does not use a UAT as well, but uses a pleated paper filter which he makes himself.
Mike
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RE: UAT Installation Orientation
ORIGINAL: Duncan
Hi Marc
i wasn't refering to the Hawk turbines, i didn't know about them. It was a referance to a semi private joke with Mark
Duncan
Hi Marc
i wasn't refering to the Hawk turbines, i didn't know about them. It was a referance to a semi private joke with Mark
Duncan
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RE: UAT Installation Orientation
Do the Hawks have screw on tailpipes? Looks like they are threaded at the end.
marcs
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RE: UAT Installation Orientation
ORIGINAL: BaldEagel
not having a UAT you don't have a bubble sitting there waiting to get into the fuel line either,
Mike
not having a UAT you don't have a bubble sitting there waiting to get into the fuel line either,
Mike
How's that then? I thought the idea of a UAT was that it trapped the air and stopped bubbles getting to the engine??
Also I don't think them Orbit type filters are too good. I've had one or two and seen loads that although they look clean, over time become restrictive and actually cause fuel pump cavatation followed by flames outs.
Jason
#24
RE: UAT Installation Orientation
ORIGINAL: jason
How's that then? I thought the idea of a UAT was that it trapped the air and stopped bubbles getting to the engine??
Also I don't think them Orbit type filters are too good. I've had one or two and seen loads that although they look clean, over time become restrictive and actually cause fuel pump cavatation followed by flames outs.
Jason
ORIGINAL: BaldEagel
not having a UAT you don't have a bubble sitting there waiting to get into the fuel line either,
Mike
not having a UAT you don't have a bubble sitting there waiting to get into the fuel line either,
Mike
How's that then? I thought the idea of a UAT was that it trapped the air and stopped bubbles getting to the engine??
Also I don't think them Orbit type filters are too good. I've had one or two and seen loads that although they look clean, over time become restrictive and actually cause fuel pump cavatation followed by flames outs.
Jason
Like any filter you need to clean them occasionally, if you have a filter clunk and fill from the UAT you are filling on the wrong side of the filter clunk, you should have an additional filling point on your main tank to fill from rather than through the UAT IMO.
I have used the Orbit clunk now for about two years without any problems on 120 size and under, but have heard of some problems with large turbines of 160 size and over, not having that size turbine I can't comment, but what I have tried is drawing fuel out of the tank with my fill station at max speed without any cavitation and the fuel was taken out down to the last few onz, it was very strange to watch fuel being drawn out of the tank from below the top of the Orbit clunk without any air in the line.
Mike
#25
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RE: UAT Installation Orientation
ORIGINAL: BaldEagel
Kero start turbines are so tolerant of air in the lines, I have got rid of mine and use an Orbit clunk this has a bag and felt filter combined, had not problems with my Elan or Rookie no matter what orientation I put them into, just one opinion and on the vote looks like the only one.
Mike
Kero start turbines are so tolerant of air in the lines, I have got rid of mine and use an Orbit clunk this has a bag and felt filter combined, had not problems with my Elan or Rookie no matter what orientation I put them into, just one opinion and on the vote looks like the only one.
Mike
I thrilled that u are not expreiencing any issues, truly. But I don't think that your case is typical ???