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Parallel Saddle Tank Setup

I've gotten feedback from pilots who like using a parallel tank setup so here is that diagram. The advantages of parallel are really the flow rate. With both tanks feeding the header/UAT, there is less strain on the fuel pump. That said, it is ABSOLUTELY CRITICAL that the tube lengths from the two saddles are EQUAL. Uneven flow from the saddles will create a situation in which one of the saddles...

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Lama Refurbishment Journey

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It will be fun to watch…hope to meet you out should our schedules align.

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Vario Bell 429 Build, a pictorial journey

How People Feel About Chapter 176 pilots reacted

I wanted to share some pictures of my mechanics testing sled that I built. Right now it has a Roban 800 mechanics on it so I can test and make any necessary adjustments before I put it in the fuselage.

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Yes, I did around 8 flights last weekend with this setup and got everything dialed in. This will now do a thumbs off hover with so small a drift it is most likely a breeze pushing her. Once I get these mechanics back in the fuselage I should only have a minor adjustment.

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Robert E. Need Advice

I am in desperate need of some help.
Don't respond if you know me ha ha.
My vario helicopters have always been gas power and now I have Skyfox mechanics and there's not one picture of any install anywhere even a direction's have assembly of the mechanics but nothing about installing the electronics with that setup.
Somebody out here must have assembled the skyfox mechanics with an electrical call...

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Hello,
I would like change my gyro and install an Axon on my EC145 Vario 1/6 turbine
Where did you install the gyro in the fuselage?
I would like change too my tank fuel tank, install 2 fuel tank.
Have you got photos of the installation in the EC145
Thanks for your return
Gilles

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Hello Gilles, J'ai aussi rédigé un article sur l'Axon, en français, donc je le signale également !

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Pre-announcement of my new XXL dome mechanics for scale models starting about 2 meters.

The aim of development was inexpensive, uncompromising construction with high versatility as possible. Can be used on many large models at your own discretion. The following attributes are also documented in the pictures.
Alloy housing , steel gearbox secondary slanted and fully encapsulated , primary gearbox...

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How to build a Helicopter Refueling System

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Thomas, the accuracy is described in the manufacturer's data sheet. I can also say that it is absolutely reliable. You can draw good conclusions from the amounts of fuel refueled after each flight.

I don't offer it as a kit. But you can send me a PM. I'm sure we can find a good solution.

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Rene G. Need Advice

Hay gang, I building a starwood Lama, I've noticed that some people use a UAT in the fuel system. I'm not sure it is needed on this model as the fuel tank is large and no 3D flying will be done. Also I only use half the tank in a flight.

Thanks for your advice!

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Hey Rene, I ALWAYS use a header tank. Even a stall turn can create bubbles in the main tank. It's simply too smart/easy/cheap a safety alternative to NOT use.

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After the last flight I had to find out at home that the UAT was almost completely filled with air. The Emcotec tank filling valve has probably not closed completely. The air got in here due to the negative pressure. It was damn close to a turbine stop. To protect against a fall caused by such a stupid thing, I have now installed a locking valve.

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Very good your request. I have a wren 44i : Practical rpm range – 4,000 to 18,000rpm, 3.24Nm, 7hp (5.3Kw) (engine to max 195k rpm)

After several turbine stops in the past, I worked very intensively on the fuel system.

There is also a very good tutorial video - turbine technology for beginners part 3 hoses..filters..air bubbles

https://youtu.be/Df00xLpnUV4

But I didn't take the -Emcotec refueling valve- into account. The manufacturer has recently added this note to the description:

DANGER
In the case of jets with several tanks (hopper tank), air can be sucked in under certain circumstances due to the resulting negative pressure. In this case, a ball shut-off valve can be looped into the tank line, which enables it to be closed securely.

It is likely that pollution occurred as a result of careless refuelling. (see schematic description)

With this arrangement, I can check for leaks in the vacuum line while emptying.
But the tank valve is not included in this leak test. 😞

Photo from Uwe B.
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