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TeeDeeVooDoo- my current project

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Re: TeeDeeVooDoo- my current project

Post  balogh on Sat Mar 24, 2018 4:14 pm

Thanks Mauricio . I really like it and find one of my fastest planes. It flies very straight thanks to the very accurate build of the fiber reinforced fuselage and wings. I had initially problems with the Tarno carburetor but after I have eliminated the air leakages around the needle valve it now works fine. I will try this plane with the COX Black Lynx I won here on CEF. I assume that the unmuffled Lynx will pull it quicker than the muffled TD049.
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Re: TeeDeeVooDoo- my current project

Post  MauricioB on Sat Mar 24, 2018 4:32 pm

balogh wrote:Thanks Mauricio . I really like it and find one of my fastest planes. It flies very straight thanks to the very accurate build of the fiber reinforced fuselage and wings. I had initially problems with the Tarno carburetor but after I have eliminated the air leakages around the needle valve it now works fine. I will try this plane with the COX Black Lynx I won here on CEF. I assume that the unmuffled Lynx will pull it quicker than the muffled TD049.

It will be a nice experience to try the Black Lynx I, but before removing the Tee Dee what I would do is remove the exhaust chamber, place an accelerator ring, logically eliminate the carburetor and place the original venturi, an APC 5.7 and a glow High compression plug and your plane will be lightning!
I mention this to you, from my own experience, here a picture, that engine flies! Thumbs Up



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Re: TeeDeeVooDoo- my current project

Post  balogh on Sat Mar 24, 2018 4:36 pm

I agree Mauricio and will do. The TD with muffler unloads in air at near 20k. Without muffler it will rev the 5x4 prop unloaded up to 24k. At least this is what I measure on my Toucan RC plane.
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Re: TeeDeeVooDoo- my current project

Post  MauricioB on Sat Mar 24, 2018 4:57 pm

balogh wrote:I agree Mauricio and will do. The TD with muffler unloads in air at near 20k. Without muffler it will rev the 5x4 prop unloaded up to 24k. At least this is what I measure on my Toucan RC plane.

You will have one more experience before completely removing the engine, I believe that your Tee Dee will seduce you in many high speed flights, that model of airplane is esquicito in aerodynamic lines added to the Tee Dee with those changes and you will have to put on your seatbelt haha ! Damn! Very Happy Thumbs Up
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Re: TeeDeeVooDoo- my current project

Post  1/2A Nut on Sat Mar 24, 2018 9:20 pm

Congratulations on your speedy Voo Doo!!!!

Front induction Cox engines always make more power then the reedie
It makes good power with the Nelson glow plug considering the
exhaust is choked down by that muffler type. I would not run the reedie.
Just try it without the exhaust restriction, see if you can live with the goo.
Do not try a 5.7x3 waste of time no speed there.

Best brief peak pass noted 87 mph



This is the best prop for that engine on that plane without any mods:

https://www.getfpv.com/hqprop-5x4-5-ccw-propeller-2-blade-2-pack-black-carbon-composite.html?utm_source=google&utm_medium=cpc&adpos=2o2&scid=scplp4109&sc_intid=4109&gclid=EAIaIQobChMInorD07eG2gIV07jACh0edQ4hEAYYAiABEgIES_D_BwE


HQ Prop Carbon 5x4.5  must be the carbon speed tip prop will hit 160 kph easy enough down wind passes.

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Re: TeeDeeVooDoo- my current project

Post  MauricioB on Sat Mar 24, 2018 10:19 pm

Good friends, I have no experience with the propeller Brad indicates, but if Brad indicates that 5 x 4.5 should not hesitate. Here there is not much to choose from, that APC 5.7, has given me many satisfactions and joys, it was just my shared experience.
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Re: TeeDeeVooDoo- my current project

Post  1/2A Nut on Sat Mar 24, 2018 11:02 pm

The APC 5.7x3 is a great prop for sport flying Thumbs Up

Small Cox Logo Easter Bunny RC Plane Cant Resist The Bunn Small Cox Logo
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Re: TeeDeeVooDoo- my current project

Post  balogh on Sun Mar 25, 2018 12:52 am

Thanks for the comments Brad and also for the greenie Mauricio. I did not expect it to hit such a speed that Brad indicated and the best flight was not even the one I posted but the last one that was cut short by the micro SD card in the camera getting full mid-air DAMMIT! . Even though I added a silicon tube to seal the NV and prevent "auto-adjustments" due to possible vibrations it is still rather chancy if I can find the sweet spot setting on the ground that will secure an even performance in the air through the last drop of fuel. (The tube not only acts like a lip sitting on the threads of the NV stem and spraybar but  also knocks tight against the face of the NV dial knob.)



The TeeDee is surely the strongest COX049 in my fleet but I found the Black Lynx I won also a very powerful engine so out of curiosity I will also give it a try....possibly next weekend because I seem to have caught influenza and the flights in 3-4C weather yesterday just made it worse.
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Re: TeeDeeVooDoo- my current project

Post  1/2A Nut on Sun Mar 25, 2018 1:49 am

Your most welcome the plane is clean so it can build up speed well. Cool

That is a locking NV (drag nut) it can produce drag on the NV threads to help keep it's setting.
I oil the needle valve to help seal from leaks.

The problem is:
Your balloon tank when full it puts pressure on the feed line as the engine runs down
the fuel pressure is less. This requires you to set a bit rich to launch so it does not
run too lean / ( erratic fuel feed) later in the flight this is not a issue with hard tanks.

Hard tanks give you a steady run throughout the flight.

For me I do not like balloon tanks because of that issue. I do not like bladders
even though they can make the engine scream that last portion of the run the
fuel feed is weak and the engine stutters around for a min.+ or so.

If using a muffler a pressure tap is always worth setting up.

Will a 1oz (30cc) round tank fit? How about 3/4th oz (20cc) round tank?

Per this pic it looks like you put a black plastic plug in the refueling line:

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Re: TeeDeeVooDoo- my current project

Post  balogh on Sun Mar 25, 2018 1:56 am

Yes Brad your observations are correct. I even use a small O ring in that locking nut and oil it when assemble to limit wear and improve sealing.. I try not to overfill the balloon so that when full it still does not force flow of fuel into the carb so in principle it is just engine suction that drives the fuel until the tank is empty.

With a hard cylindric tank I would need a heavy clunk for aerobatics and a vent line. With yhe balloon these complications are saved.. Very Happy  I agree though chances for an even run are higher with a pressurized hard tank. Yes the plug is a black plastic one.
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Re: TeeDeeVooDoo- my current project

Post  1/2A Nut on Sun Mar 25, 2018 2:24 am

I am happy you have it working your project was a conciderable
investment in regards to the composite plane. Beer Cheers

Do you think as the fuel leaves the air tight thick walled rubber
balloon the engine's carb has to work harder to collapse the balloon
in order to draw the last of the fuel?
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Re: TeeDeeVooDoo- my current project

Post  balogh on Sun Mar 25, 2018 2:30 am

Sure Brad it was not cheap but is worth it plus I do not have the skills and tools for planes built from skratch. RC Plane
Until the last say 5 seconds when the balloon collapses the fuel feed is even. Then unfortunately a 5 sec lean run ends the flight... (it is not long to cause damage). When I open my planes with balloon tanks right after the flight the tanks are always found collapsed and sucked to almost dry..I use perforations along the syphon inside the tank to make sure fuel should find its way out even if the syphon end slightly sucks in the balloon bottom. And the balloon material is thin...this is a toy party balloon only.
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Re: TeeDeeVooDoo- my current project

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