Tettra bubble less tank in a Nobler??
 

Hi!
Any using Tettra "Bubble less" tank in a old classic Nobler?? Or in CL in general?

Hi Jaka, yes and yes. I do infact use Tetra 5.5 Tetra bubbless in my Nobler .35AX and my Magician .40FP. Both are throttled engines and I now use Hitec 2.4 systems rather than my old Young over the wire system.

In both ships I find using the bubbless give me the best and most uniform engine runs possible and far better than the old unflow methods. I now can make and entire flight of touch and gos If I want and the engine response is perfect.

I Prefer using a syringe method for fueling with the bubbless and in my case I us a Dub Jett Tanker left over from my active pylon days. I would highly recommend the Tetra or Jett bubbless systems for any controlline use. I would post pictures but cannot yet with this new forum setup.

Johnhttp://www.rcuniverse.com/forum/atta...mentid=1906955http://www.rcuniverse.com/forum/atta...mentid=1906956


Well hot diggity I finally got some photos posted:)

OK I have hunted and hunted on various vendors sites. I don't find them.
All the CL planes above 1/2a that I build from now on will have a 2.4ghz for throttle.
Where in heck do you find Tetra bubbless tanks?

Ken

Hi Ken good speaking with you agine. I believe Central Hobbies is the only major supplier of Tetra but not sure perhaps some of the cottage industry pylon specific suppliers do. Anyway here they are and be careful they also sell Tetra conventional tanks that look almost the same so just be sure you order "Bubbless". They are not cheap but for controlline or some problematic RC types especially throttled engines they are more than worth it.

http://www.centralhobbies.com/Fuel/fueltnk2.html

John

http://www.rcuniverse.com/forum/atta...mentid=1907027http://www.rcuniverse.com/forum/atta...mentid=1907028


Here is an older shot of the Magician with the Tetra and here is one of my old vidios flying the Magician with the tetra and you will hear the steady running as well as throttling. Watch my feet 13 seconds into the vidio:)


http://www.youtube.com/watch?v=7zJ1oHc2QIo

Hey thanks John.
That is a supplier I did not know about.
You are right, they are a little spending, but it takes what it takes.

Take care

Ken

PS what are you using for a throttle servo? I think what I used in my last plane is heavy for the job at 16 grams.

Ken both of those ships have Hitec Minis Hs 225's. If you wanted to save a few more grams then I have also used Hitec Hs 85's on many airplane throttles.

John

I get my Tettra tanks from Darrol Caddy. www.darrolcady.com .......Gene

The cons of bubbless for CL use may be that it cannot be set up as uniflow.
Aki

There is one con to using a bubbless system for controlline but its certainly not "uniflow". That con is I believe the weight may be marginally higher. That's something I am definitely willing to pay for given the tremendous advantages over conventional or uniflow. That includes effortless setups without all the testing and angonizing over uniflow.

Now if one uses throttle such as scale folks or those gimpy folks like myself the bubbless is far superior. I also use them on some problematical rc airplanes. For example I have one four engine and one six engine airplane that during certain manuvers such as a roll the outboard engines surge in and out due to all the weird forces way out there on the wings. Originallly used conventiona tanks but replace all with Tetra's and that problem went away like magic.

In my opinion the bubbless systems by either Jett or Tetra is far superior to any conventional type and that includes all the uniflow schemes.

Being a pylon racing fan at heart for nearly 33 years I use Tettra "Bubbleless" tanks were ever possible in my R/C racers,and not only in my racers.Tettra tanks improve engine settings for all engines/models.

I started building this Nobler 1975 when I was 21 years old and last year thought about finnaly finnish it.
Soo how large Tettra tank should I use? The "Nobler" is supposed to be powered by an OS LA .40 engine.

Hi Jaka,
You will need 150cc because 110cc is not enough for LA40.
But it MAY be impossible to use a bubbless because of narrow fuse Nobler. I do not know for sure.
Aki

Jaka as a long time Pylon flyer then you certainly know the advantages of Bubbless and as am I. Also I understand your desire to try it, good for you. For whatever reason controlline traditionlist always seems to put it down and say it won,t work, well balonny it works great.


I also know that they 'Will' fit into a Nobeler, that is because as I posted above the I have been flying mine just fine with a Tetra bubbless for several years now. The only possible difference I can think of is mine is an ARF version and of course yours is not and to be honest I seriously doubt that the outline have been changed. No doubt as a pylon enthusiast you will have plenty of the 5.5 ounce (150cc) on hand and it can easily be measured to see for yourself.

By the way the 5.5 ounce/150cc Tetra bubbless is the size that I have been using a long time in both my Nobeler OS .35AX as well as my Magician OS .40FP.

Good luck and please lets hear of your success:)

John

Hi!
Do you think a Tettra 110cc will be enough for competition in the FAI (F-2A) class? I have plenty of 150cc and 170cc Tettra tanks too as we use these in Q-500 and FAI pylon, but if the 110cc tank will suffice that would be nice.

I am sorry Jan I don,t fly competitive controlline and I do not know your needs for F-2A. I do know that while I have never have tested any times since using the 150's it does sure seems like a have a lot of fuel left over every time and that of course is not very definitive (at least two times my average flight) it's enough for me to spend the cost of one tank finding out.

Of course using the 110's would make installation even easier.


John

Hi Jan san,
110cc is just on the boundary line for LA40. Some are OK, others need 120 or 130cc for F2B.
And, does your Nobler have deeper tank room (= shaved mounts) to accept a deeper tank?
Aki