"Perfect" clunk tank

**Cribbs74** Sun Feb 19, 2012 7:52 pm

I got tired of their not being any sub 1oz clunk tanks on the market so like others I decided to make my own.

I used a 3/4 oz perfect tank to do the mod with. Pretty straight forward take a look!

Before the mod.........

[img]

[/img]

[img]

[/img

and after..........

[img]

[/img]

[img]

[/img]

I have noted two problems with this mod, 1 you can"t clean it out easily so you should probably run a filter and 2 you can't replace the hose easily. There you have it! real easy to do and it looks good. I like perfect tanks cause they look like real fuel tanks Wink

**Cribbs74** Thu Feb 23, 2012 7:46 am

Nobody? C'mon I need my ego stroked!

I suppose you could bruise my ego as well..... lol!

John Goddard Thu Feb 23, 2012 7:50 am

cribbs74 wrote:Nobody? C'mon I need my ego stroked!

I suppose you could bruise my ego as well.....

Looks good to me big guy.
Very Happy

**RknRusty** Thu Feb 23, 2012 8:42 am

What position are you going to mount it in?

**Cribbs74** Thu Feb 23, 2012 8:56 am

John Goddard wrote:
cribbs74 wrote:Nobody? C'mon I need my ego stroked!

I suppose you could bruise my ego as well.....

Looks good to me big guy.

Thanks John,

I am sure I am not the first to do this. I wanted to have a clunk tank for a future .020 RC model. Guys like yourself having been around the hobby for a while are always coming up with something new. The perfect tanks are a bit heavier as they are more of a CL/FF tank but, they look good and there is a really wide selection of sizes available.

**Cribbs74** Thu Feb 23, 2012 8:58 am

RknRusty wrote:What position are you going to mount it in?

Rusty,

I am planning to mount it vertical as shown, it really could be mounted in any position as the clunk hits all sides. Do you forsee a problem?

**RknRusty** Thu Feb 23, 2012 9:11 am

cribbs74 wrote:
RknRusty wrote:What position are you going to mount it in?

Rusty,

I am planning to mount it vertical as shown, it really could be mounted in any position as the clunk hits all sides. Do you forsee a problem?

No, it should be fine as long as the clunk moves freely. It will suck air in a nose down attitude, but they all do that.

John Goddard Thu Feb 23, 2012 9:29 am

Only when it's stopped Rusty, don't forget as long as there's forward motion the fuel will sit at the rear of the tank.
Very Happy

**Cribbs74** Thu Feb 23, 2012 9:30 am

RknRusty wrote:
cribbs74 wrote:
RknRusty wrote:What position are you going to mount it in?

Rusty,

I am planning to mount it vertical as shown, it really could be mounted in any position as the clunk hits all sides. Do you forsee a problem?
No, it should be fine as long as the clunk moves freely. It will suck air in a nose down attitude, but they all do that.

Yeah I can see that, I guess pressure feed would alleviate that. I have a question for you! Seeing as you are a hard core CL guy how in the world did the combat flyers/stunters of yester year ever keep the engines running with these "perfect" and "veco" tanks? I have been watching some CL combat vids on youtube and those planes are all over the place. Sometimes I wonder how they even do it as the planes move so fast that I can barely see them and they dart in all directions. The guys flying them are not young men either!

GermanBeez Thu Feb 23, 2012 9:32 am

this tank looks more like it's intended for c/l flying, it has that wedge shape to it.
but it looks really good. btw, how thick is that sheet metal its made out of?
it always looks very flimsy to me when i see one of those...

**Cribbs74** Thu Feb 23, 2012 9:44 am

GermanBeez wrote:this tank looks more like it's intended for c/l flying, it has that wedge shape to it.
but it looks really good. btw, how thick is that sheet metal its made out of?
it always looks very flimsy to me when i see one of those...

It was intended for CL but, I modded it for RC. I have not measured the thickness of the metal. I can say it is not flimsy, actually it is pretty robust! If you really screwed the model into the ground I am sure it would ding but, probably wouldn't rupture.

**Cribbs74** Thu Feb 23, 2012 9:47 am

cribbs74 wrote:
GermanBeez wrote:this tank looks more like it's intended for c/l flying, it has that wedge shape to it.
but it looks really good. btw, how thick is that sheet metal its made out of?
it always looks very flimsy to me when i see one of those...

It was intended for CL but, I modded it for RC. I have not measured the thickness of the metal. I can say it is not flimsy, actually it is pretty robust! If you really screwed the model into the ground I am sure it would ding but, probably wouldn't rupture.

Not sure if it's sheet metal either as it takes solder quite well regular sheet metal and led/tin solder do not play together well. Maybe it is tinned brass or copper.

GermanBeez Thu Feb 23, 2012 9:47 am

it has the "retro" look Very Happy

btw, awesome tire brand you got there, LOL!

**Cribbs74** Thu Feb 23, 2012 9:58 am

GermanBeez wrote:it has the "retro" look

btw, awesome tire brand you got there, LOL!

Hey! Lay off my tires! lol!

They are a cheap brand for sure. They are old and dry rotted but, still get me down the road. I have put 17,000 miles on them and they still have tread. The ones on the rear are even older and who knows how many miles same brand well over 17k on those.

That's my daily driver '72 dodge D100.

GermanBeez Thu Feb 23, 2012 9:59 am

lol, i just love the name "road hugger" Very Happy

**Cribbs74** Thu Feb 23, 2012 10:03 am

Yeah, it does sound lame. I'll give you that........

**RknRusty** Thu Feb 23, 2012 10:04 am

John Goddard wrote:Only when it's stopped Rusty, don't forget as long as there's forward motion the fuel will sit at the rear of the tank.

The only way the fuel stays in the rear when it's nose down is if the plane is accelerating at more than 1g. That's good for loops, but not a slow final approach in an R/C plane.

GermanBeez Thu Feb 23, 2012 10:05 am

ok, back to topic...
how are you gonna fasten the thing? i don't see any mounting lugs.
i'd probably go the unprofessional way and zip-tie its *ss on there.

**Cribbs74** Thu Feb 23, 2012 10:27 am

GermanBeez wrote:ok, back to topic...
how are you gonna fasten the thing? i don't see any mounting lugs.
i'd probably go the unprofessional way and zip-tie its *ss on there.

Wedged inside foam padding.......? Not sure. If I were to use a sullivan clunk tank it would be the same, actually come to think of it what tanks have mounting lugs? I would think direct bolt to the frame would not be desireable due to vibrations (foaming) unless you had rubber mounting pads or something.

GermanBeez Thu Feb 23, 2012 10:42 am

sounds, good, you could also use some of that metal band with holes in it like this:
"Perfect" clunk tank 2217_0

i bet that would make it really sturdy.

**Cribbs74** Thu Feb 23, 2012 10:46 am

GermanBeez wrote:sounds, good, you could also use some of that metal band with holes in it like this:

i bet that would make it really sturdy.

Ahh good ol plumbing/muffler tape. Thanks for the suggestion.

GermanBeez Thu Feb 23, 2012 10:53 am

yup, that in combination with your foam padding should work great!

dankar04 Thu Feb 23, 2012 10:55 am

Ron, good job on tank. It should work fine for you.
Dan

PV Pilot Thu Feb 23, 2012 11:08 am

The only thing I could see is if the inner clunk tube was to fold forward and somehow get kinked/stuck, as if you were to flip inverted on a almost empty tank. You would have to deadstick in and then shake the tank to get the clunk back down where it is supposed to be.

But for simple daydream flying, it looks to be a very good setup, Congrats!

**Cribbs74** Thu Feb 23, 2012 11:19 am

PV Pilot wrote:The only thing I could see is if the inner clunk tube was to fold forward and somehow get kinked/stuck, as if you were to flip inverted on a almost empty tank. You would have to deadstick in and then shake the tank to get the clunk back down where it is supposed to be.

But for simple daydream flying, it looks to be a very good setup, Congrats!

Thanks PV,

I never thought of that! Although the clunk sits at the back of tank and the tank is about an inch wide sitting vertically so if the clunk was to fold on itself it wouldn't have much room to do so. Unless, a really hard jarring was involved and if that happened I would be having bigger problems! Smile

Sponsored content

"Perfect" clunk tank

"Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Perfect tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank

Re: "Perfect" clunk tank