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HelicopterMain Discussion › Why don't more people use uniflow?
12-04-2005 05:53 PM  12 years agoPost 41
ESWLFSE

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Liberty Hill, TX

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OK I'll do it. Whats the best way to add the nipple for the extra clunk on a Raptor tank? If you've done it 7 times you're the master.

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12-04-2005 06:00 PM  12 years agoPost 42
Al Magaloff

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Master of nothing. I've used these since the beginning of Xcell helis. Still tough to beat! http://www.ronlund.com/Merchant2/me...uct_Code=MA0403 Some people will just drill a hole in the tank, smaller than the diameter of the line, and stretch the line through the hole, forming it's own seal. I like the fitting method, but it does require you to buy something extra.

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12-04-2005 06:04 PM  12 years agoPost 43
Al Magaloff

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I also use these clamps on the three lines. http://www.ronlund.com/Merchant2/me...uct_Code=KSJ975

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12-04-2005 07:08 PM  12 years agoPost 44
ESWLFSE

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Got clamps, ordering fittings. How about a two-hole clunk? Would joining the two clunks together offer any benefits? If there are two in there maybe they should just move around as one?

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12-04-2005 11:12 PM  12 years agoPost 45
GMPheli

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In order for it to work best they should be tied together. This would ensure that they are as close to the same head pressure as possible

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12-04-2005 11:57 PM  12 years agoPost 46
Al Magaloff

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There's a guy in the UK that made a dual clunk pick-up. It was expensive. I'm not sure if he's still making it, but it was very nicely done. In my limited experience, two separate clunks do just fine. I put the second fitting in the same face of the tank that the main fitting is in.

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12-05-2005 12:45 PM  12 years agoPost 47
GMPheli

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I tied them together with small tie wraps. Make sure you don't use the ones that have a metal tang inside them as they will rust. I used a tie wrap on each clunk line with a tie wrap going between (under each of) them. Then I wrapped another tie wrap around the tie wrap in the middle, if that makes any sense.

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12-05-2005 02:10 PM  12 years agoPost 48
ChristianM

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Oslo, Norway

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Mine are not tied together and they work like a charm.

Christian

Burn fuel, be happy

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12-05-2005 05:28 PM  12 years agoPost 49
Al Magaloff

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Mine are not tied together either. Shortly after birth, they dropped down into their own little bag.

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12-05-2005 06:27 PM  12 years agoPost 50
crowfly

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Pleasant View, TN U.S.A.

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Al,,,,,,,,,,,you ain't right.

If God had meant for man to fly, he would have given him more money

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12-05-2005 11:37 PM  12 years agoPost 51
GMPheli

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I know it will work if not tied together, but the whole idea is for them to be at the same level in the tank all the time. I doubt this will happen during wild 3D.

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12-06-2005 12:10 AM  12 years agoPost 52
Al Magaloff

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Al,,,,,,,,,,,you ain't right.
I know! And now I got a bozo( aimmaker, or something like that) telling me I'm not loved either!!!!

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12-06-2005 12:15 AM  12 years agoPost 53
Al Magaloff

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GMP, you're probably right, but I've always had thoughts, that if the two clunks were too close to one another, then the exhaust bubble could get sucked directly into the pick-up line. Others have had the same thought, and staggered the clunks, one short line, one longer. As far as wild 3D goes, I'm thinking the clunks are going to follow gravity, where ever that is.

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12-06-2005 02:46 AM  12 years agoPost 54
ESWLFSE

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Liberty Hill, TX

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OK so who is going to post the first dual clunk video so we can see what is really going on in there?

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12-06-2005 12:36 PM  12 years agoPost 55
GMPheli

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They probably will both just follow gravity/centrifigal force. I was afraid that they might somehow get tangled, or vibrate together and cause noise

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12-06-2005 05:47 PM  12 years agoPost 56
Al Magaloff

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might somehow get tangled
I thought the same. Before I ran the set-up the first time, I outfitted a tank with the dual clunks/lines, and sat watching TV while shaking the tank like a spray can. Any time the lines would foul, they seemed to easily slide apart, so I was comfortable with it. The noise is an interesting thought ! These types of discussions are cool. Everyone looks at the same thing differently!

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12-06-2005 08:36 PM  12 years agoPost 57
nivlek

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Norfolk England

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I would think that the fact the clunks are in fuel would minimise/prevent any chance of metal to metal noise being created . (The fuel would effectively electrically tie both clunks together).

At the end of the day , it gets dark .

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12-06-2005 09:27 PM  12 years agoPost 58
huntmaester

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Monroe, LA

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ViperHawk fixed me up with Uniflow. You can tell a difference. Nigel's write up was a little complex but if you can follow the underlying priciple it makes sense.

The point is that fuel pressure at the carb stays the same. I know that you must think me a novice at heli's but I did graduate with a physics degree and understand the priciple. If you want to test yourself, the easiest thing to do is take a water bottle, open the top, an poke a hole in the bottom. You will notice that the stream of water will no shoot out as far as the bottle empties.

Now, if you have a pump or use the case pressure, you don't need it. Also, if ain't broke don't fix it.

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12-06-2005 11:03 PM  12 years agoPost 59
Al Magaloff

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(The fuel would effectively electrically tie both clunks together).
When my boys bang together, there's some pain, but no RF as far as I know.

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HelicopterMain Discussion › Why don't more people use uniflow?
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