AndyAndrews

Does anyone use these INSTEAD of a UAT? If so does it work better or the same or what? Seems to me that if it works just as good as a felt UAT then the benefits are less weight and potential leaks.

Andy
Link to clunk:
http://www.jetpowerus.com/shop/categ...m=cid%3D110%26

seanreit

My Feedback: (60)

This falls under "your mileage may vary." this has been disussed extensively, youshould look it up, someguys swear by it, and some swear by the other, uat's.

jason

My Feedback: (1)

UAT is certainly the way to go and the people who use a UAT are far less likely to have a fuel related flame out.

If there is one single item that has given reliability to turbine models then it's the UAT.

J

AndyAndrews

Yea, I just saw an ad in the back of this months Jet Power Mag and thought I would ask.

Woketman

My Feedback: (6)

A UAT may be better than one of these ceramic thingies, but it is certainly NOT better than the pleated paper filter.

jason

My Feedback: (1)

How interesting,

why do you think that?

Jason

AndyAndrews

yea , never heard that before.

causeitflies

It's what I use, in a hopper tank.

S_Ellzey

It has been a few years since this was explained. The filter acts as a fuel tension screen, once it is wet, air can not get through as long as some small portion is still in the fuel. This concept has been used in cruise missiles.
In the drawing below the system in placed in a 2 oz Sullivan tank, and should be let up right for best performance.

Steven

E.N.T.

My Feedback: (1)

Andy: See Treppas post about these people. They have 2 business names.


Hector

jason

My Feedback: (1)

I think most of us on here know the reasons why and how a UAT works but I am wondering why Woketman thinks a pleated paper filter is more effective than a UAT bearing in mind that the wetted area of the strainer in the UAT is larger than the paper type.

jason

seanreit

My Feedback: (60)

Jason, in times like this, I recognize that both Steve and Mark are real life rocket scientists, I hit my "I believe" button

jason

My Feedback: (1)

Sean

I'm not saying I don't believe it but it just seems wrong to me so I was hoping that a "real life rocket scientist" could explain why.

Jason

seanreit

My Feedback: (60)

I would then refer you to the search button where both of them have explained this before in great detail.

AndyAndrews

The "Search" engine in RC Universe SUCKS and you know it. I hate using it. Half the time you never get any good results and you end up spending wasted time finding something that can be answered rather quickly.

If they updated the search feature this board would probably be half as large.

causeitflies

Plus, he never said it was better than a UAT. He said the UAT was not better than the pleated paper.
The explanation given by S Ellzey was for the pleated paper filter, not the UAT.

G4guy

My Feedback: (13)

I have flown thousands of flight with Mercurys, Pegasus with nothing but a 4,6 or 8 oz hopper tank with a felt filtered clunk. I have never had a flame out. If it works, I stick with it!

Ron

seanreit

My Feedback: (60)

That's not true, here is a result, very specific once you take the time to learn how to use it, took me two seconds:
I will post others for a fee!
http://www.rcuniverse.com/forum/m_16...tm.htm#1689873

seanreit

My Feedback: (60)

Is this list search result too long for you? AGAIN, TWO SECONDS TO DO THE SEARCH.

http://www.rcuniverse.com/forum/sear...mitbutton=+OK+

jason

My Feedback: (1)

Sean

your RCU searching skills are truly amazing and thank you for taking the time out to do it for us.

Jason

Couch Potato

I was doing some tests on a Pegasus (NL) a few weeks ago.
I ran the fuel so low that the pump was pulling FOAM out of the UAT and onto the engine. It still ran fine although the pump was working hard.
I was amazed ! [X(] The Merc/Peggy/Olly family are very bubble tolerant.

Other (usually smaller) engines will quit with just one bubble.

AndyAndrews

sure you can get a bunch of half way related crap in 2 seconds. Now you have to weed through all of that to find any specifics. SUCKS I tell ya!

AndyAndrews

heres what you get with the "ceramic filter" search:

http://www.rcuniverse.com/forum/sear...D&sortMethod=d

I would have to open each and every thread to find what I am looking for. The search engine should pull out any word that says "ceramic" and point you to that post. Unless someone actually puts the word "ceramic" in the title it won't find it directly.

seanreit

My Feedback: (60)

nvrmind

Woketman

My Feedback: (6)

The reasons that I feel that the pleated paper is better than the UAT (and I have used both) are multiple: A) When I use the pleater paper, I mount it in a 20 or 24 oz. (Dubro, I think?) tank on a very thin walled Tygon tube with it weighted. It also then acts as a clunk and if there is an air leak or some other reason that air enters the hopper tank, you have a larger margin because the pleated paper also uses surface tension (as the UAT) but also follows the fuel around. B) its WAY cheaper! C) it allows me to use the 20 or 24 oz capacity of the hopper tank for a bit extra fuel volume D) no hassles of getting rid of bubbles.

That said, there are situations where a UAT is preferrable such as my Boomer Sprint where there really is no convenient spot for a 20 oz tank. I would have then made my own header, such as the MAP one (a small Nalgene bottle with a pleated paper filter in the middle, held rigidly), but I found a UAT laying around (I'm lazy!).